1 /* vi: set sw=4 ts=4: */
3 * Busybox main internal header file
5 * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
6 * Permission has been granted to redistribute this code under GPL.
8 * Licensed under GPLv2, see file LICENSE in this source tree.
23 #if defined __UCLIBC__ /* TODO: and glibc? */
24 /* use inlined versions of these: */
25 # define sigfillset(s) __sigfillset(s)
26 # define sigemptyset(s) __sigemptyset(s)
27 # define sigisemptyset(s) __sigisemptyset(s)
35 /* There are two incompatible basename's, let not use them! */
36 /* See the dirname/basename man page for details */
37 #include <libgen.h> /* dirname,basename */
39 #define basename dont_use_basename
41 #include <sys/ioctl.h>
43 #include <sys/socket.h>
46 #include <sys/types.h>
48 # include <sys/sysmacros.h>
53 #include <sys/param.h>
57 #ifdef HAVE_SYS_STATFS_H
58 # include <sys/statfs.h>
60 /* Don't do this here:
61 * #include <sys/sysinfo.h>
62 * Some linux/ includes pull in conflicting definition
63 * of struct sysinfo (only in some toolchanins), which breaks build.
64 * Include sys/sysinfo.h only in those files which need it.
67 # include <selinux/selinux.h>
68 # include <selinux/context.h>
69 # include <selinux/flask.h>
70 # include <selinux/av_permissions.h>
72 #if ENABLE_FEATURE_UTMP
75 #if ENABLE_LOCALE_SUPPORT
78 # define setlocale(x,y) ((void)0)
85 #if ENABLE_FEATURE_SHADOWPASSWDS
86 # if !ENABLE_USE_BB_SHADOW
87 /* If using busybox's shadow implementation, do not include the shadow.h
88 * header as the toolchain may not provide it at all.
93 /* Just in case libc doesn't define some of these... */
95 #define _PATH_PASSWD "/etc/passwd"
98 #define _PATH_GROUP "/etc/group"
101 #define _PATH_SHADOW "/etc/shadow"
103 #ifndef _PATH_GSHADOW
104 #define _PATH_GSHADOW "/etc/gshadow"
106 #if defined __FreeBSD__ || defined __OpenBSD__
107 # include <netinet/in.h>
108 # include <arpa/inet.h>
109 #elif defined __APPLE__
110 # include <netinet/in.h>
112 # include <arpa/inet.h>
113 # if !defined(__socklen_t_defined) && !defined(_SOCKLEN_T_DECLARED)
114 /* We #define socklen_t *after* includes, otherwise we get
115 * typedef redefinition errors from system headers
116 * (in case "is it defined already" detection above failed)
118 # define socklen_t bb_socklen_t
119 typedef unsigned socklen_t;
122 #ifndef HAVE_CLEARENV
123 # define clearenv() do { if (environ) environ[0] = NULL; } while (0)
125 #ifndef HAVE_FDATASYNC
126 # define fdatasync fsync
133 /* Some libc's forget to declare these, do it ourself */
135 extern char **environ;
136 #if defined(__GLIBC__) && __GLIBC__ < 2
137 int vdprintf(int d, const char *format, va_list ap);
139 /* klogctl is in libc's klog.h, but we cheat and not #include that */
140 int klogctl(int type, char *b, int len);
142 # define PATH_MAX 256
149 /* Busybox does not use threads, we can speed up stdio. */
150 #ifdef HAVE_UNLOCKED_STDIO
152 # define getc(stream) getc_unlocked(stream)
154 # define getchar() getchar_unlocked()
156 # define putc(c, stream) putc_unlocked(c, stream)
158 # define putchar(c) putchar_unlocked(c)
160 # define fgetc(stream) getc_unlocked(stream)
162 # define fputc(c, stream) putc_unlocked(c, stream)
164 /* Above functions are required by POSIX.1-2008, below ones are extensions */
165 #ifdef HAVE_UNLOCKED_LINE_OPS
167 # define fgets(s, n, stream) fgets_unlocked(s, n, stream)
169 # define fputs(s, stream) fputs_unlocked(s, stream)
173 /* Make all declarations hidden (-fvisibility flag only affects definitions) */
174 /* (don't include system headers after this until corresponding pop!) */
175 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
178 #if ENABLE_USE_BB_PWD_GRP
182 #if ENABLE_FEATURE_SHADOWPASSWDS
183 # if ENABLE_USE_BB_SHADOW
184 # include "shadow_.h"
188 /* Tested to work correctly with all int types (IIRC :]) */
189 #define MAXINT(T) (T)( \
192 : (T)~((T)1 << (sizeof(T)*8-1)) \
195 #define MININT(T) (T)( \
198 : ((T)1 << (sizeof(T)*8-1)) \
201 /* Large file support */
202 /* Note that CONFIG_LFS=y forces bbox to be built with all common ops
203 * (stat, lseek etc) mapped to "largefile" variants by libc.
204 * Practically it means that open() automatically has O_LARGEFILE added
205 * and all filesize/file_offset parameters and struct members are "large"
206 * (in today's world - signed 64bit). For full support of large files,
207 * we need a few helper #defines (below) and careful use of off_t
208 * instead of int/ssize_t. No lseek64(), O_LARGEFILE etc necessary */
210 /* CONFIG_LFS is on */
211 # if ULONG_MAX > 0xffffffff
212 /* "long" is long enough on this system */
213 typedef unsigned long uoff_t;
214 # define XATOOFF(a) xatoul_range(a, 0, LONG_MAX)
215 /* usage: sz = BB_STRTOOFF(s, NULL, 10); if (errno || sz < 0) die(); */
216 # define BB_STRTOOFF bb_strtoul
217 # define STRTOOFF strtoul
218 /* usage: printf("size: %"OFF_FMT"d (%"OFF_FMT"x)\n", sz, sz); */
221 /* "long" is too short, need "long long" */
222 typedef unsigned long long uoff_t;
223 # define XATOOFF(a) xatoull_range(a, 0, LLONG_MAX)
224 # define BB_STRTOOFF bb_strtoull
225 # define STRTOOFF strtoull
226 # define OFF_FMT "ll"
229 /* CONFIG_LFS is off */
230 # if UINT_MAX == 0xffffffff
231 /* While sizeof(off_t) == sizeof(int), off_t is typedef'ed to long anyway.
232 * gcc will throw warnings on printf("%d", off_t). Crap... */
233 typedef unsigned long uoff_t;
234 # define XATOOFF(a) xatoi_positive(a)
235 # define BB_STRTOOFF bb_strtou
236 # define STRTOOFF strtol
239 typedef unsigned long uoff_t;
240 # define XATOOFF(a) xatoul_range(a, 0, LONG_MAX)
241 # define BB_STRTOOFF bb_strtoul
242 # define STRTOOFF strtol
246 /* scary. better ideas? (but do *test* them first!) */
247 #define OFF_T_MAX ((off_t)~((off_t)1 << (sizeof(off_t)*8-1)))
249 /* Some useful definitions */
251 #define FALSE ((int) 0)
253 #define TRUE ((int) 1)
255 #define SKIP ((int) 2)
258 #define MTAB_GETMOUNTPT '1'
259 #define MTAB_GETDEVICE '2'
261 #define BUF_SIZE 8192
262 #define EXPAND_ALLOC 1024
264 /* Macros for min/max. */
266 #define MIN(a,b) (((a)<(b))?(a):(b))
270 #define MAX(a,b) (((a)>(b))?(a):(b))
273 /* buffer allocation schemes */
274 #if ENABLE_FEATURE_BUFFERS_GO_ON_STACK
275 #define RESERVE_CONFIG_BUFFER(buffer,len) char buffer[len]
276 #define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char buffer[len]
277 #define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
279 #if ENABLE_FEATURE_BUFFERS_GO_IN_BSS
280 #define RESERVE_CONFIG_BUFFER(buffer,len) static char buffer[len]
281 #define RESERVE_CONFIG_UBUFFER(buffer,len) static unsigned char buffer[len]
282 #define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
284 #define RESERVE_CONFIG_BUFFER(buffer,len) char *buffer = xmalloc(len)
285 #define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char *buffer = xmalloc(len)
286 #define RELEASE_CONFIG_BUFFER(buffer) free(buffer)
290 #if defined(__GLIBC__)
291 /* glibc uses __errno_location() to get a ptr to errno */
292 /* We can just memorize it once - no multithreading in busybox :) */
293 extern int *const bb_errno;
295 #define errno (*bb_errno)
298 #if !(ULONG_MAX > 0xffffffff)
299 /* Only 32-bit CPUs need this, 64-bit ones use inlined version */
300 uint64_t bb_bswap_64(uint64_t x) FAST_FUNC;
303 unsigned long long monotonic_ns(void) FAST_FUNC;
304 unsigned long long monotonic_us(void) FAST_FUNC;
305 unsigned long long monotonic_ms(void) FAST_FUNC;
306 unsigned monotonic_sec(void) FAST_FUNC;
308 extern void chomp(char *s) FAST_FUNC;
309 extern void trim(char *s) FAST_FUNC;
310 extern char *skip_whitespace(const char *) FAST_FUNC;
311 extern char *skip_non_whitespace(const char *) FAST_FUNC;
312 extern char *skip_dev_pfx(const char *tty_name) FAST_FUNC;
314 extern char *strrstr(const char *haystack, const char *needle) FAST_FUNC;
316 //TODO: supply a pointer to char[11] buffer (avoid statics)?
317 extern const char *bb_mode_string(mode_t mode) FAST_FUNC;
318 extern int is_directory(const char *name, int followLinks, struct stat *statBuf) FAST_FUNC;
319 enum { /* DO NOT CHANGE THESE VALUES! cp.c, mv.c, install.c depend on them. */
320 FILEUTILS_PRESERVE_STATUS = 1 << 0, /* -p */
321 FILEUTILS_DEREFERENCE = 1 << 1, /* !-d */
322 FILEUTILS_RECUR = 1 << 2, /* -R */
323 FILEUTILS_FORCE = 1 << 3, /* -f */
324 FILEUTILS_INTERACTIVE = 1 << 4, /* -i */
325 FILEUTILS_MAKE_HARDLINK = 1 << 5, /* -l */
326 FILEUTILS_MAKE_SOFTLINK = 1 << 6, /* -s */
327 FILEUTILS_DEREF_SOFTLINK = 1 << 7, /* -L */
328 FILEUTILS_DEREFERENCE_L0 = 1 << 8, /* -H */
330 FILEUTILS_PRESERVE_SECURITY_CONTEXT = 1 << 9, /* -c */
331 FILEUTILS_SET_SECURITY_CONTEXT = 1 << 10,
334 #define FILEUTILS_CP_OPTSTR "pdRfilsLH" IF_SELINUX("c")
335 extern int remove_file(const char *path, int flags) FAST_FUNC;
336 /* NB: without FILEUTILS_RECUR in flags, it will basically "cat"
337 * the source, not copy (unless "source" is a directory).
338 * This makes "cp /dev/null file" and "install /dev/null file" (!!!)
339 * work coreutils-compatibly. */
340 extern int copy_file(const char *source, const char *dest, int flags) FAST_FUNC;
343 ACTION_RECURSE = (1 << 0),
344 ACTION_FOLLOWLINKS = (1 << 1),
345 ACTION_FOLLOWLINKS_L0 = (1 << 2),
346 ACTION_DEPTHFIRST = (1 << 3),
347 /*ACTION_REVERSE = (1 << 4), - unused */
348 ACTION_QUIET = (1 << 5),
349 ACTION_DANGLING_OK = (1 << 6),
351 typedef uint8_t recurse_flags_t;
352 extern int recursive_action(const char *fileName, unsigned flags,
353 int FAST_FUNC (*fileAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
354 int FAST_FUNC (*dirAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
355 void* userData, unsigned depth) FAST_FUNC;
356 extern int device_open(const char *device, int mode) FAST_FUNC;
357 enum { GETPTY_BUFSIZE = 16 }; /* more than enough for "/dev/ttyXXX" */
358 extern int xgetpty(char *line) FAST_FUNC;
359 extern int get_console_fd_or_die(void) FAST_FUNC;
360 extern void console_make_active(int fd, const int vt_num) FAST_FUNC;
361 extern char *find_block_device(const char *path) FAST_FUNC;
362 /* bb_copyfd_XX print read/write errors and return -1 if they occur */
363 extern off_t bb_copyfd_eof(int fd1, int fd2) FAST_FUNC;
364 extern off_t bb_copyfd_size(int fd1, int fd2, off_t size) FAST_FUNC;
365 extern void bb_copyfd_exact_size(int fd1, int fd2, off_t size) FAST_FUNC;
366 /* "short" copy can be detected by return value < size */
367 /* this helper yells "short read!" if param is not -1 */
368 extern void complain_copyfd_and_die(off_t sz) NORETURN FAST_FUNC;
370 extern char bb_process_escape_sequence(const char **ptr) FAST_FUNC;
371 char* strcpy_and_process_escape_sequences(char *dst, const char *src) FAST_FUNC;
372 /* xxxx_strip version can modify its parameter:
376 * "abc/def/" -> "def" !!
378 char *bb_get_last_path_component_strip(char *path) FAST_FUNC;
379 /* "abc/def/" -> "" and it never modifies 'path' */
380 char *bb_get_last_path_component_nostrip(const char *path) FAST_FUNC;
381 /* Simpler version: does not special case "/" string */
382 const char *bb_basename(const char *name) FAST_FUNC;
383 /* NB: can violate const-ness (similarly to strchr) */
384 char *last_char_is(const char *s, int c) FAST_FUNC;
386 void ndelay_on(int fd) FAST_FUNC;
387 void ndelay_off(int fd) FAST_FUNC;
388 void close_on_exec_on(int fd) FAST_FUNC;
389 void xdup2(int, int) FAST_FUNC;
390 void xmove_fd(int, int) FAST_FUNC;
393 DIR *xopendir(const char *path) FAST_FUNC;
394 DIR *warn_opendir(const char *path) FAST_FUNC;
396 char *xmalloc_realpath(const char *path) FAST_FUNC RETURNS_MALLOC;
397 char *xmalloc_readlink(const char *path) FAST_FUNC RETURNS_MALLOC;
398 char *xmalloc_readlink_or_warn(const char *path) FAST_FUNC RETURNS_MALLOC;
399 /* !RETURNS_MALLOC: it's a realloc-like function */
400 char *xrealloc_getcwd_or_warn(char *cwd) FAST_FUNC;
402 char *xmalloc_follow_symlinks(const char *path) FAST_FUNC RETURNS_MALLOC;
406 /* bb_signals(BB_FATAL_SIGS, handler) catches all signals which
407 * otherwise would kill us, except for those resulting from bugs:
408 * SIGSEGV, SIGILL, SIGFPE.
409 * Other fatal signals not included (TODO?):
410 * SIGBUS Bus error (bad memory access)
411 * SIGPOLL Pollable event. Synonym of SIGIO
412 * SIGPROF Profiling timer expired
413 * SIGSYS Bad argument to routine
414 * SIGTRAP Trace/breakpoint trap
416 * The only known arch with some of these sigs not fitting
417 * into 32 bits is parisc (SIGXCPU=33, SIGXFSZ=34, SIGSTKFLT=36).
418 * Dance around with long long to guard against that...
420 BB_FATAL_SIGS = (int)(0
424 + (1LL << SIGPIPE) // Write to pipe with no readers
425 + (1LL << SIGQUIT) // Quit from keyboard
426 + (1LL << SIGABRT) // Abort signal from abort(3)
427 + (1LL << SIGALRM) // Timer signal from alarm(2)
428 + (1LL << SIGVTALRM) // Virtual alarm clock
429 + (1LL << SIGXCPU) // CPU time limit exceeded
430 + (1LL << SIGXFSZ) // File size limit exceeded
431 + (1LL << SIGUSR1) // Yes kids, these are also fatal!
435 void bb_signals(int sigs, void (*f)(int)) FAST_FUNC;
436 /* Unlike signal() and bb_signals, sets handler with sigaction()
437 * and in a way that while signal handler is run, no other signals
438 * will be blocked; syscalls will not be restarted: */
439 void bb_signals_recursive_norestart(int sigs, void (*f)(int)) FAST_FUNC;
440 /* syscalls like read() will be interrupted with EINTR: */
441 void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
442 /* syscalls like read() won't be interrupted (though select/poll will be): */
443 void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
444 void wait_for_any_sig(void) FAST_FUNC;
445 void kill_myself_with_sig(int sig) NORETURN FAST_FUNC;
446 void sig_block(int sig) FAST_FUNC;
447 void sig_unblock(int sig) FAST_FUNC;
448 /* Will do sigaction(signum, act, NULL): */
449 int sigaction_set(int sig, const struct sigaction *act) FAST_FUNC;
450 /* SIG_BLOCK/SIG_UNBLOCK all signals: */
451 int sigprocmask_allsigs(int how) FAST_FUNC;
452 /* Standard handler which just records signo */
453 extern smallint bb_got_signal;
454 void record_signo(int signo); /* not FAST_FUNC! */
457 void xsetgid(gid_t gid) FAST_FUNC;
458 void xsetuid(uid_t uid) FAST_FUNC;
459 void xchdir(const char *path) FAST_FUNC;
460 void xchroot(const char *path) FAST_FUNC;
461 void xsetenv(const char *key, const char *value) FAST_FUNC;
462 void bb_unsetenv(const char *key) FAST_FUNC;
463 void bb_unsetenv_and_free(char *key) FAST_FUNC;
464 void xunlink(const char *pathname) FAST_FUNC;
465 void xstat(const char *pathname, struct stat *buf) FAST_FUNC;
466 void xfstat(int fd, struct stat *buf, const char *errmsg) FAST_FUNC;
467 int xopen(const char *pathname, int flags) FAST_FUNC;
468 int xopen_nonblocking(const char *pathname) FAST_FUNC;
469 int xopen3(const char *pathname, int flags, int mode) FAST_FUNC;
470 int open_or_warn(const char *pathname, int flags) FAST_FUNC;
471 int open3_or_warn(const char *pathname, int flags, int mode) FAST_FUNC;
472 int open_or_warn_stdin(const char *pathname) FAST_FUNC;
473 int xopen_stdin(const char *pathname) FAST_FUNC;
474 void xrename(const char *oldpath, const char *newpath) FAST_FUNC;
475 int rename_or_warn(const char *oldpath, const char *newpath) FAST_FUNC;
476 off_t xlseek(int fd, off_t offset, int whence) FAST_FUNC;
477 int xmkstemp(char *template) FAST_FUNC;
478 off_t fdlength(int fd) FAST_FUNC;
480 uoff_t FAST_FUNC get_volume_size_in_bytes(int fd,
481 const char *override,
482 unsigned override_units,
485 void xpipe(int filedes[2]) FAST_FUNC;
486 /* In this form code with pipes is much more readable */
487 struct fd_pair { int rd; int wr; };
488 #define piped_pair(pair) pipe(&((pair).rd))
489 #define xpiped_pair(pair) xpipe(&((pair).rd))
491 /* Useful for having small structure members/global variables */
492 typedef int8_t socktype_t;
493 typedef int8_t family_t;
494 struct BUG_too_small {
495 char BUG_socktype_t_too_small[(0
502 char BUG_family_t_too_small[(0
519 void parse_datestr(const char *date_str, struct tm *ptm) FAST_FUNC;
520 time_t validate_tm_time(const char *date_str, struct tm *ptm) FAST_FUNC;
523 int xsocket(int domain, int type, int protocol) FAST_FUNC;
524 void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen) FAST_FUNC;
525 void xlisten(int s, int backlog) FAST_FUNC;
526 void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen) FAST_FUNC;
527 ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to,
528 socklen_t tolen) FAST_FUNC;
529 /* SO_REUSEADDR allows a server to rebind to an address that is already
530 * "in use" by old connections to e.g. previous server instance which is
531 * killed or crashed. Without it bind will fail until all such connections
532 * time out. Linux does not allow multiple live binds on same ip:port
533 * regardless of SO_REUSEADDR (unlike some other flavors of Unix).
534 * Turn it on before you call bind(). */
535 void setsockopt_reuseaddr(int fd) FAST_FUNC; /* On Linux this never fails. */
536 int setsockopt_broadcast(int fd) FAST_FUNC;
537 int setsockopt_bindtodevice(int fd, const char *iface) FAST_FUNC;
538 /* NB: returns port in host byte order */
539 unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port) FAST_FUNC;
540 typedef struct len_and_sockaddr {
544 struct sockaddr_in sin;
545 #if ENABLE_FEATURE_IPV6
546 struct sockaddr_in6 sin6;
551 LSA_LEN_SIZE = offsetof(len_and_sockaddr, u),
552 LSA_SIZEOF_SA = sizeof(
555 struct sockaddr_in sin;
556 #if ENABLE_FEATURE_IPV6
557 struct sockaddr_in6 sin6;
562 /* Create stream socket, and allocate suitable lsa.
563 * (lsa of correct size and lsa->sa.sa_family (AF_INET/AF_INET6))
564 * af == AF_UNSPEC will result in trying to create IPv6 socket,
565 * and if kernel doesn't support it, fall back to IPv4.
566 * This is useful if you plan to bind to resulting local lsa.
568 #if ENABLE_FEATURE_IPV6
569 int xsocket_type(len_and_sockaddr **lsap, int af, int sock_type) FAST_FUNC;
571 int xsocket_type(len_and_sockaddr **lsap, int sock_type) FAST_FUNC;
572 #define xsocket_type(lsap, af, sock_type) xsocket_type((lsap), (sock_type))
574 int xsocket_stream(len_and_sockaddr **lsap) FAST_FUNC;
575 /* Create server socket bound to bindaddr:port. bindaddr can be NULL,
576 * numeric IP ("N.N.N.N") or numeric IPv6 address,
577 * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
578 * Only if there is no suffix, port argument is used */
579 /* NB: these set SO_REUSEADDR before bind */
580 int create_and_bind_stream_or_die(const char *bindaddr, int port) FAST_FUNC;
581 int create_and_bind_dgram_or_die(const char *bindaddr, int port) FAST_FUNC;
582 /* Create client TCP socket connected to peer:port. Peer cannot be NULL.
583 * Peer can be numeric IP ("N.N.N.N"), numeric IPv6 address or hostname,
584 * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
585 * If there is no suffix, port argument is used */
586 int create_and_connect_stream_or_die(const char *peer, int port) FAST_FUNC;
587 /* Connect to peer identified by lsa */
588 int xconnect_stream(const len_and_sockaddr *lsa) FAST_FUNC;
589 /* Get local address of bound or accepted socket */
590 len_and_sockaddr *get_sock_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
591 /* Get remote address of connected or accepted socket */
592 len_and_sockaddr *get_peer_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
593 /* Return malloc'ed len_and_sockaddr with socket address of host:port
594 * Currently will return IPv4 or IPv6 sockaddrs only
595 * (depending on host), but in theory nothing prevents e.g.
596 * UNIX socket address being returned, IPX sockaddr etc...
597 * On error does bb_error_msg and returns NULL */
598 len_and_sockaddr* host2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
599 /* Version which dies on error */
600 len_and_sockaddr* xhost2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
601 len_and_sockaddr* xdotted2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
602 /* Same, useful if you want to force family (e.g. IPv6) */
603 #if !ENABLE_FEATURE_IPV6
604 #define host_and_af2sockaddr(host, port, af) host2sockaddr((host), (port))
605 #define xhost_and_af2sockaddr(host, port, af) xhost2sockaddr((host), (port))
607 len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
608 len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
610 /* Assign sin[6]_port member if the socket is an AF_INET[6] one,
611 * otherwise no-op. Useful for ftp.
612 * NB: does NOT do htons() internally, just direct assignment. */
613 void set_nport(struct sockaddr *sa, unsigned port) FAST_FUNC;
614 /* Retrieve sin[6]_port or return -1 for non-INET[6] lsa's */
615 int get_nport(const struct sockaddr *sa) FAST_FUNC;
616 /* Reverse DNS. Returns NULL on failure. */
617 char* xmalloc_sockaddr2host(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
618 /* This one doesn't append :PORTNUM */
619 char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
620 /* This one also doesn't fall back to dotted IP (returns NULL) */
621 char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
622 /* inet_[ap]ton on steroids */
623 char* xmalloc_sockaddr2dotted(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
624 char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
625 // "old" (ipv4 only) API
626 // users: traceroute.c hostname.c - use _list_ of all IPs
627 struct hostent *xgethostbyname(const char *name) FAST_FUNC;
628 // Also mount.c and inetd.c are using gethostbyname(),
629 // + inet_common.c has additional IPv4-only stuff
632 void socket_want_pktinfo(int fd) FAST_FUNC;
633 ssize_t send_to_from(int fd, void *buf, size_t len, int flags,
634 const struct sockaddr *to,
635 const struct sockaddr *from,
636 socklen_t tolen) FAST_FUNC;
637 ssize_t recv_from_to(int fd, void *buf, size_t len, int flags,
638 struct sockaddr *from,
640 socklen_t sa_size) FAST_FUNC;
642 uint16_t inet_cksum(uint16_t *addr, int len) FAST_FUNC;
644 char *xstrdup(const char *s) FAST_FUNC RETURNS_MALLOC;
645 char *xstrndup(const char *s, int n) FAST_FUNC RETURNS_MALLOC;
646 void overlapping_strcpy(char *dst, const char *src) FAST_FUNC;
647 char *safe_strncpy(char *dst, const char *src, size_t size) FAST_FUNC;
648 char *strncpy_IFNAMSIZ(char *dst, const char *src) FAST_FUNC;
649 /* Guaranteed to NOT be a macro (smallest code). Saves nearly 2k on uclibc.
650 * But potentially slow, don't use in one-billion-times loops */
651 int bb_putchar(int ch) FAST_FUNC;
652 /* Note: does not use stdio, writes to fd 2 directly */
653 int bb_putchar_stderr(char ch) FAST_FUNC;
654 char *xasprintf(const char *format, ...) __attribute__ ((format(printf, 1, 2))) FAST_FUNC RETURNS_MALLOC;
655 // gcc-4.1.1 still isn't good enough at optimizing it
656 // (+200 bytes compared to macro)
657 //static ALWAYS_INLINE
658 //int LONE_DASH(const char *s) { return s[0] == '-' && !s[1]; }
659 //static ALWAYS_INLINE
660 //int NOT_LONE_DASH(const char *s) { return s[0] != '-' || s[1]; }
661 #define LONE_DASH(s) ((s)[0] == '-' && !(s)[1])
662 #define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1])
663 #define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1])
664 #define NOT_LONE_CHAR(s,c) ((s)[0] != (c) || (s)[1])
665 #define DOT_OR_DOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2])))
667 typedef struct uni_stat_t {
669 unsigned unicode_count;
670 unsigned unicode_width;
672 /* Returns a string with unprintable chars replaced by '?' or
673 * SUBST_WCHAR. This function is unicode-aware. */
674 const char* FAST_FUNC printable_string(uni_stat_t *stats, const char *str);
675 /* Prints unprintable char ch as ^C or M-c to file
676 * (M-c is used only if ch is ORed with PRINTABLE_META),
677 * else it is printed as-is (except for ch = 0x9b) */
678 enum { PRINTABLE_META = 0x100 };
679 void fputc_printable(int ch, FILE *file) FAST_FUNC;
681 /* dmalloc will redefine these to it's own implementation. It is safe
682 * to have the prototypes here unconditionally. */
683 void *malloc_or_warn(size_t size) FAST_FUNC RETURNS_MALLOC;
684 void *xmalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
685 void *xzalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
686 void *xrealloc(void *old, size_t size) FAST_FUNC;
687 /* After xrealloc_vector(v, 4, idx) it's ok to use
688 * at least v[idx] and v[idx+1], for all idx values.
689 * shift specifies how many new elements are added (1: 2, 2: 4... 8: 256...)
690 * when all elements are used up. New elements are zeroed out. */
691 #define xrealloc_vector(vector, shift, idx) \
692 xrealloc_vector_helper((vector), (sizeof((vector)[0]) << 8) + (shift), (idx))
693 void* xrealloc_vector_helper(void *vector, unsigned sizeof_and_shift, int idx) FAST_FUNC;
696 extern ssize_t safe_read(int fd, void *buf, size_t count) FAST_FUNC;
697 extern ssize_t nonblock_immune_read(int fd, void *buf, size_t count, int loop_on_EINTR) FAST_FUNC;
698 // NB: will return short read on error, not -1,
699 // if some data was read before error occurred
700 extern ssize_t full_read(int fd, void *buf, size_t count) FAST_FUNC;
701 extern void xread(int fd, void *buf, size_t count) FAST_FUNC;
702 extern unsigned char xread_char(int fd) FAST_FUNC;
703 extern ssize_t read_close(int fd, void *buf, size_t maxsz) FAST_FUNC;
704 extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz) FAST_FUNC;
705 // Reads one line a-la fgets (but doesn't save terminating '\n').
706 // Reads byte-by-byte. Useful when it is important to not read ahead.
707 // Bytes are appended to pfx (which must be malloced, or NULL).
708 extern char *xmalloc_reads(int fd, size_t *maxsz_p) FAST_FUNC;
709 /* Reads block up to *maxsz_p (default: INT_MAX - 4095) */
710 extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
711 /* Returns NULL if file can't be opened (default max size: INT_MAX - 4095) */
712 extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
713 /* Never returns NULL */
714 extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
715 /* Autodetects gzip/bzip2 formats. fd may be in the middle of the file! */
716 #if ENABLE_FEATURE_SEAMLESS_LZMA \
717 || ENABLE_FEATURE_SEAMLESS_BZ2 \
718 || ENABLE_FEATURE_SEAMLESS_GZ \
719 /* || ENABLE_FEATURE_SEAMLESS_Z */
720 extern void setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/) FAST_FUNC;
722 # define setup_unzip_on_fd(...) ((void)0)
724 /* Autodetects .gz etc */
725 extern int open_zipped(const char *fname) FAST_FUNC;
726 extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
728 extern ssize_t safe_write(int fd, const void *buf, size_t count) FAST_FUNC;
729 // NB: will return short write on error, not -1,
730 // if some data was written before error occurred
731 extern ssize_t full_write(int fd, const void *buf, size_t count) FAST_FUNC;
732 extern void xwrite(int fd, const void *buf, size_t count) FAST_FUNC;
733 extern void xwrite_str(int fd, const char *str) FAST_FUNC;
734 extern ssize_t full_write1_str(const char *str) FAST_FUNC;
735 extern ssize_t full_write2_str(const char *str) FAST_FUNC;
736 extern void xopen_xwrite_close(const char* file, const char *str) FAST_FUNC;
738 /* Close fd, but check for failures (some types of write errors) */
739 extern void xclose(int fd) FAST_FUNC;
741 /* Reads and prints to stdout till eof, then closes FILE. Exits on error: */
742 extern void xprint_and_close_file(FILE *file) FAST_FUNC;
744 /* Reads a line from a text file, up to a newline or NUL byte, inclusive.
745 * Returns malloc'ed char*. If end is NULL '\n' isn't considered
746 * end of line. If end isn't NULL, length of the chunk is stored in it.
747 * Returns NULL if EOF/error.
749 extern char *bb_get_chunk_from_file(FILE *file, int *end) FAST_FUNC;
750 /* Reads up to (and including) TERMINATING_STRING: */
751 extern char *xmalloc_fgets_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
752 /* Same, with limited max size, and returns the length (excluding NUL): */
753 extern char *xmalloc_fgets_str_len(FILE *file, const char *terminating_string, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
754 /* Chops off TERMINATING_STRING from the end: */
755 extern char *xmalloc_fgetline_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
756 /* Reads up to (and including) "\n" or NUL byte: */
757 extern char *xmalloc_fgets(FILE *file) FAST_FUNC RETURNS_MALLOC;
758 /* Chops off '\n' from the end, unlike fgets: */
759 extern char *xmalloc_fgetline(FILE *file) FAST_FUNC RETURNS_MALLOC;
760 /* Same, but doesn't try to conserve space (may have some slack after the end) */
761 /* extern char *xmalloc_fgetline_fast(FILE *file) FAST_FUNC RETURNS_MALLOC; */
763 void die_if_ferror(FILE *file, const char *msg) FAST_FUNC;
764 void die_if_ferror_stdout(void) FAST_FUNC;
765 int fflush_all(void) FAST_FUNC;
766 void fflush_stdout_and_exit(int retval) NORETURN FAST_FUNC;
767 int fclose_if_not_stdin(FILE *file) FAST_FUNC;
768 FILE* xfopen(const char *filename, const char *mode) FAST_FUNC;
769 /* Prints warning to stderr and returns NULL on failure: */
770 FILE* fopen_or_warn(const char *filename, const char *mode) FAST_FUNC;
771 /* "Opens" stdin if filename is special, else just opens file: */
772 FILE* xfopen_stdin(const char *filename) FAST_FUNC;
773 FILE* fopen_or_warn_stdin(const char *filename) FAST_FUNC;
774 FILE* fopen_for_read(const char *path) FAST_FUNC;
775 FILE* xfopen_for_read(const char *path) FAST_FUNC;
776 FILE* fopen_for_write(const char *path) FAST_FUNC;
777 FILE* xfopen_for_write(const char *path) FAST_FUNC;
778 FILE* xfdopen_for_read(int fd) FAST_FUNC;
779 FILE* xfdopen_for_write(int fd) FAST_FUNC;
781 int bb_pstrcmp(const void *a, const void *b) /* not FAST_FUNC! */;
782 void qsort_string_vector(char **sv, unsigned count) FAST_FUNC;
784 /* Wrapper which restarts poll on EINTR or ENOMEM.
785 * On other errors complains [perror("poll")] and returns.
786 * Warning! May take (much) longer than timeout_ms to return!
787 * If this is a problem, use bare poll and open-code EINTR/ENOMEM handling */
788 int safe_poll(struct pollfd *ufds, nfds_t nfds, int timeout_ms) FAST_FUNC;
790 char *safe_gethostname(void) FAST_FUNC;
791 char *safe_getdomainname(void) FAST_FUNC;
793 /* Convert each alpha char in str to lower-case */
794 char* str_tolower(char *str) FAST_FUNC;
796 char *utoa(unsigned n) FAST_FUNC;
797 char *itoa(int n) FAST_FUNC;
798 /* Returns a pointer past the formatted number, does NOT null-terminate */
799 char *utoa_to_buf(unsigned n, char *buf, unsigned buflen) FAST_FUNC;
800 char *itoa_to_buf(int n, char *buf, unsigned buflen) FAST_FUNC;
801 /* Intelligent formatters of bignums */
802 void smart_ulltoa4(unsigned long long ul, char buf[4], const char *scale) FAST_FUNC;
803 void smart_ulltoa5(unsigned long long ul, char buf[5], const char *scale) FAST_FUNC;
804 /* If block_size == 0, display size without fractional part,
805 * else display (size * block_size) with one decimal digit.
806 * If display_unit == 0, show value no bigger than 1024 with suffix (K,M,G...),
807 * else divide by display_unit and do not use suffix. */
808 #define HUMAN_READABLE_MAX_WIDTH 7 /* "1024.0G" */
809 #define HUMAN_READABLE_MAX_WIDTH_STR "7"
810 //TODO: provide pointer to buf (avoid statics)?
811 const char *make_human_readable_str(unsigned long long size,
812 unsigned long block_size, unsigned long display_unit) FAST_FUNC;
813 /* Put a string of hex bytes ("1b2e66fe"...), return advanced pointer */
814 char *bin2hex(char *buf, const char *cp, int count) FAST_FUNC;
816 char* hex2bin(char *dst, const char *str, int count) FAST_FUNC;
818 /* Generate a UUID */
819 void generate_uuid(uint8_t *buf) FAST_FUNC;
821 /* Last element is marked by mult == 0 */
829 /* Using xatoi() instead of naive atoi() is not always convenient -
830 * in many places people want *non-negative* values, but store them
831 * in signed int. Therefore we need this one:
832 * dies if input is not in [0, INT_MAX] range. Also will reject '-0' etc.
833 * It should really be named xatoi_nonnegative (since it allows 0),
834 * but that would be too long.
836 int xatoi_positive(const char *numstr) FAST_FUNC;
838 /* Useful for reading port numbers */
839 uint16_t xatou16(const char *numstr) FAST_FUNC;
842 /* These parse entries in /etc/passwd and /etc/group. This is desirable
843 * for BusyBox since we want to avoid using the glibc NSS stuff, which
844 * increases target size and is often not needed on embedded systems. */
845 long xuname2uid(const char *name) FAST_FUNC;
846 long xgroup2gid(const char *name) FAST_FUNC;
847 /* wrapper: allows string to contain numeric uid or gid */
848 unsigned long get_ug_id(const char *s, long FAST_FUNC (*xname2id)(const char *)) FAST_FUNC;
849 /* from chpst. Does not die, returns 0 on failure */
854 /* always sets uid and gid */
855 int get_uidgid(struct bb_uidgid_t*, const char*, int numeric_ok) FAST_FUNC;
856 /* always sets uid and gid, allows numeric; exits on failure */
857 void xget_uidgid(struct bb_uidgid_t*, const char*) FAST_FUNC;
858 /* chown-like handling of "user[:[group]" */
859 void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group) FAST_FUNC;
860 struct passwd* xgetpwnam(const char *name) FAST_FUNC;
861 struct group* xgetgrnam(const char *name) FAST_FUNC;
862 struct passwd* xgetpwuid(uid_t uid) FAST_FUNC;
863 struct group* xgetgrgid(gid_t gid) FAST_FUNC;
864 char* xuid2uname(uid_t uid) FAST_FUNC;
865 char* xgid2group(gid_t gid) FAST_FUNC;
866 char* uid2uname(uid_t uid) FAST_FUNC;
867 char* gid2group(gid_t gid) FAST_FUNC;
868 char* uid2uname_utoa(uid_t uid) FAST_FUNC;
869 char* gid2group_utoa(gid_t gid) FAST_FUNC;
870 /* versions which cache results (useful for ps, ls etc) */
871 const char* get_cached_username(uid_t uid) FAST_FUNC;
872 const char* get_cached_groupname(gid_t gid) FAST_FUNC;
873 void clear_username_cache(void) FAST_FUNC;
874 /* internally usernames are saved in fixed-sized char[] buffers */
875 enum { USERNAME_MAX_SIZE = 32 - sizeof(uid_t) };
876 #if ENABLE_FEATURE_CHECK_NAMES
877 void die_if_bad_username(const char* name) FAST_FUNC;
879 #define die_if_bad_username(name) ((void)(name))
882 #if ENABLE_FEATURE_UTMP
883 void FAST_FUNC write_new_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
884 void FAST_FUNC update_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
886 # define write_new_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
887 # define update_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
891 int execable_file(const char *name) FAST_FUNC;
892 char *find_execable(const char *filename, char **PATHp) FAST_FUNC;
893 int exists_execable(const char *filename) FAST_FUNC;
895 /* BB_EXECxx always execs (it's not doing NOFORK/NOEXEC stuff),
896 * but it may exec busybox and call applet instead of searching PATH.
898 #if ENABLE_FEATURE_PREFER_APPLETS
899 int BB_EXECVP(const char *file, char *const argv[]) FAST_FUNC;
900 #define BB_EXECLP(prog,cmd,...) \
902 if (find_applet_by_name(prog) >= 0) \
903 execlp(bb_busybox_exec_path, cmd, __VA_ARGS__); \
904 execlp(prog, cmd, __VA_ARGS__); \
907 #define BB_EXECVP(prog,cmd) execvp(prog,cmd)
908 #define BB_EXECLP(prog,cmd,...) execlp(prog,cmd,__VA_ARGS__)
910 int BB_EXECVP_or_die(char **argv) NORETURN FAST_FUNC;
912 /* xvfork() can't be a _function_, return after vfork mangles stack
913 * in the parent. It must be a macro. */
916 pid_t bb__xvfork_pid = vfork(); \
917 if (bb__xvfork_pid < 0) \
918 bb_perror_msg_and_die("vfork"); \
922 pid_t xfork(void) FAST_FUNC;
925 /* NOMMU friendy fork+exec: */
926 pid_t spawn(char **argv) FAST_FUNC;
927 pid_t xspawn(char **argv) FAST_FUNC;
929 pid_t safe_waitpid(pid_t pid, int *wstat, int options) FAST_FUNC;
930 pid_t wait_any_nohang(int *wstat) FAST_FUNC;
931 /* wait4pid: unlike waitpid, waits ONLY for one process.
932 * Returns sig + 0x180 if child is killed by signal.
933 * It's safe to pass negative 'pids' from failed [v]fork -
934 * wait4pid will return -1 (and will not clobber [v]fork's errno).
935 * IOW: rc = wait4pid(spawn(argv));
936 * if (rc < 0) bb_perror_msg("%s", argv[0]);
937 * if (rc > 0) bb_error_msg("exit code: %d", rc & 0xff);
939 int wait4pid(pid_t pid) FAST_FUNC;
940 /* Same as wait4pid(spawn(argv)), but with NOFORK/NOEXEC if configured: */
941 int spawn_and_wait(char **argv) FAST_FUNC;
942 /* Does NOT check that applet is NOFORK, just blindly runs it */
943 int run_nofork_applet(int applet_no, char **argv) FAST_FUNC;
945 /* Helpers for daemonization.
947 * bb_daemonize(flags) = daemonize, does not compile on NOMMU
949 * bb_daemonize_or_rexec(flags, argv) = daemonizes on MMU (and ignores argv),
950 * rexec's itself on NOMMU with argv passed as command line.
951 * Thus bb_daemonize_or_rexec may cause your <applet>_main() to be re-executed
952 * from the start. (It will detect it and not reexec again second time).
953 * You have to audit carefully that you don't do something twice as a result
954 * (opening files/sockets, parsing config files etc...)!
956 * Both of the above will redirect fd 0,1,2 to /dev/null and drop ctty
957 * (will do setsid()).
959 * fork_or_rexec(argv) = bare-bones fork on MMU,
960 * "vfork + re-exec ourself" on NOMMU. No fd redirection, no setsid().
961 * On MMU ignores argv.
963 * Helper for network daemons in foreground mode:
965 * bb_sanitize_stdio() = make sure that fd 0,1,2 are opened by opening them
966 * to /dev/null if they are not.
969 DAEMON_CHDIR_ROOT = 1,
970 DAEMON_DEVNULL_STDIO = 2,
971 DAEMON_CLOSE_EXTRA_FDS = 4,
972 DAEMON_ONLY_SANITIZE = 8, /* internal use */
975 enum { re_execed = 0 };
976 # define fork_or_rexec(argv) xfork()
977 # define bb_daemonize_or_rexec(flags, argv) bb_daemonize_or_rexec(flags)
978 # define bb_daemonize(flags) bb_daemonize_or_rexec(flags, bogus)
980 extern bool re_execed;
981 void re_exec(char **argv) NORETURN FAST_FUNC;
982 pid_t fork_or_rexec(char **argv) FAST_FUNC;
983 int BUG_fork_is_unavailable_on_nommu(void) FAST_FUNC;
984 int BUG_daemon_is_unavailable_on_nommu(void) FAST_FUNC;
985 void BUG_bb_daemonize_is_unavailable_on_nommu(void) FAST_FUNC;
986 # define fork() BUG_fork_is_unavailable_on_nommu()
987 # define xfork() BUG_fork_is_unavailable_on_nommu()
988 # define daemon(a,b) BUG_daemon_is_unavailable_on_nommu()
989 # define bb_daemonize(a) BUG_bb_daemonize_is_unavailable_on_nommu()
991 void bb_daemonize_or_rexec(int flags, char **argv) FAST_FUNC;
992 void bb_sanitize_stdio(void) FAST_FUNC;
993 /* Clear dangerous stuff, set PATH. Return 1 if was run by different user. */
994 int sanitize_env_if_suid(void) FAST_FUNC;
997 char* single_argv(char **argv) FAST_FUNC;
998 extern const char *const bb_argv_dash[]; /* "-", NULL */
999 extern const char *opt_complementary;
1000 #if ENABLE_LONG_OPTS || ENABLE_FEATURE_GETOPT_LONG
1001 #define No_argument "\0"
1002 #define Required_argument "\001"
1003 #define Optional_argument "\002"
1004 extern const char *applet_long_options;
1006 extern uint32_t option_mask32;
1007 extern uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC;
1010 /* Having next pointer as a first member allows easy creation
1011 * of "llist-compatible" structs, and using llist_FOO functions
1014 typedef struct llist_t {
1015 struct llist_t *link;
1018 void llist_add_to(llist_t **old_head, void *data) FAST_FUNC;
1019 void llist_add_to_end(llist_t **list_head, void *data) FAST_FUNC;
1020 void *llist_pop(llist_t **elm) FAST_FUNC;
1021 void llist_unlink(llist_t **head, llist_t *elm) FAST_FUNC;
1022 void llist_free(llist_t *elm, void (*freeit)(void *data)) FAST_FUNC;
1023 llist_t *llist_rev(llist_t *list) FAST_FUNC;
1024 llist_t *llist_find_str(llist_t *first, const char *str) FAST_FUNC;
1025 /* BTW, surprisingly, changing API to
1026 * llist_t *llist_add_to(llist_t *old_head, void *data)
1027 * etc does not result in smaller code... */
1029 /* start_stop_daemon and udhcpc are special - they want
1030 * to create pidfiles regardless of FEATURE_PIDFILE */
1031 #if ENABLE_FEATURE_PIDFILE || defined(WANT_PIDFILE)
1032 /* True only if we created pidfile which is *file*, not /dev/null etc */
1033 extern smallint wrote_pidfile;
1034 void write_pidfile(const char *path) FAST_FUNC;
1035 #define remove_pidfile(path) do { if (wrote_pidfile) unlink(path); } while (0)
1037 enum { wrote_pidfile = 0 };
1038 #define write_pidfile(path) ((void)0)
1039 #define remove_pidfile(path) ((void)0)
1044 LOGMODE_STDIO = (1 << 0),
1045 LOGMODE_SYSLOG = (1 << 1) * ENABLE_FEATURE_SYSLOG,
1046 LOGMODE_BOTH = LOGMODE_SYSLOG + LOGMODE_STDIO,
1048 extern const char *msg_eol;
1049 extern smallint logmode;
1050 extern int die_sleep;
1051 extern uint8_t xfunc_error_retval;
1052 extern jmp_buf die_jmp;
1053 extern void xfunc_die(void) NORETURN FAST_FUNC;
1054 extern void bb_show_usage(void) NORETURN FAST_FUNC;
1055 extern void bb_error_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1056 extern void bb_error_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
1057 extern void bb_perror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1058 extern void bb_simple_perror_msg(const char *s) FAST_FUNC;
1059 extern void bb_perror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
1060 extern void bb_simple_perror_msg_and_die(const char *s) NORETURN FAST_FUNC;
1061 extern void bb_herror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1062 extern void bb_herror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
1063 extern void bb_perror_nomsg_and_die(void) NORETURN FAST_FUNC;
1064 extern void bb_perror_nomsg(void) FAST_FUNC;
1065 extern void bb_info_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1066 extern void bb_verror_msg(const char *s, va_list p, const char *strerr) FAST_FUNC;
1068 /* We need to export XXX_main from libbusybox
1069 * only if we build "individual" binaries
1071 #if ENABLE_FEATURE_INDIVIDUAL
1072 #define MAIN_EXTERNALLY_VISIBLE EXTERNALLY_VISIBLE
1074 #define MAIN_EXTERNALLY_VISIBLE
1078 /* Applets which are useful from another applets */
1079 int bb_cat(char** argv);
1080 /* If shell needs them, they exist even if not enabled as applets */
1081 int echo_main(int argc, char** argv) IF_ECHO(MAIN_EXTERNALLY_VISIBLE);
1082 int printf_main(int argc, char **argv) IF_PRINTF(MAIN_EXTERNALLY_VISIBLE);
1083 int test_main(int argc, char **argv) IF_TEST(MAIN_EXTERNALLY_VISIBLE);
1084 int kill_main(int argc, char **argv) IF_KILL(MAIN_EXTERNALLY_VISIBLE);
1085 /* Similar, but used by chgrp, not shell */
1086 int chown_main(int argc, char **argv) IF_CHOWN(MAIN_EXTERNALLY_VISIBLE);
1088 int ls_main(int argc, char **argv) IF_LS(MAIN_EXTERNALLY_VISIBLE);
1089 /* Don't need IF_xxx() guard for these */
1090 int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1091 int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1094 void bb_displayroutes(int noresolve, int netstatfmt) FAST_FUNC;
1099 int create_icmp_socket(void) FAST_FUNC;
1100 int create_icmp6_socket(void) FAST_FUNC;
1102 /* This structure defines protocol families and their handlers. */
1108 char* FAST_FUNC (*print)(unsigned char *);
1109 const char* FAST_FUNC (*sprint)(struct sockaddr *, int numeric);
1110 int FAST_FUNC (*input)(/*int type,*/ const char *bufp, struct sockaddr *);
1111 void FAST_FUNC (*herror)(char *text);
1112 int FAST_FUNC (*rprint)(int options);
1113 int FAST_FUNC (*rinput)(int typ, int ext, char **argv);
1114 /* may modify src */
1115 int FAST_FUNC (*getmask)(char *src, struct sockaddr *mask, char *name);
1117 /* This structure defines hardware protocols and their handlers. */
1123 char* FAST_FUNC (*print)(unsigned char *);
1124 int FAST_FUNC (*input)(const char *, struct sockaddr *);
1125 int FAST_FUNC (*activate)(int fd);
1126 int suppress_null_addr;
1128 extern smallint interface_opt_a;
1129 int display_interfaces(char *ifname) FAST_FUNC;
1130 #if ENABLE_FEATURE_HWIB
1131 int in_ib(const char *bufp, struct sockaddr *sap) FAST_FUNC;
1133 #define in_ib(a, b) 1 /* fail */
1135 const struct aftype *get_aftype(const char *name) FAST_FUNC;
1136 const struct hwtype *get_hwtype(const char *name) FAST_FUNC;
1137 const struct hwtype *get_hwntype(int type) FAST_FUNC;
1140 #ifndef BUILD_INDIVIDUAL
1141 extern int find_applet_by_name(const char *name) FAST_FUNC;
1142 /* Returns only if applet is not found. */
1143 extern void run_applet_and_exit(const char *name, char **argv) FAST_FUNC;
1144 extern void run_applet_no_and_exit(int a, char **argv) NORETURN FAST_FUNC;
1147 #ifdef HAVE_MNTENT_H
1148 extern int match_fstype(const struct mntent *mt, const char *fstypes) FAST_FUNC;
1149 extern struct mntent *find_mount_point(const char *name, int subdir_too) FAST_FUNC;
1151 extern void erase_mtab(const char * name) FAST_FUNC;
1152 extern unsigned int tty_baud_to_value(speed_t speed) FAST_FUNC;
1153 extern speed_t tty_value_to_baud(unsigned int value) FAST_FUNC;
1155 extern void bb_warn_ignoring_args(char *arg) FAST_FUNC;
1157 # define bb_warn_ignoring_args(arg) ((void)0)
1160 extern int get_linux_version_code(void) FAST_FUNC;
1162 extern char *query_loop(const char *device) FAST_FUNC;
1163 extern int del_loop(const char *device) FAST_FUNC;
1164 /* If *devname is not NULL, use that name, otherwise try to find free one,
1165 * malloc and return it in *devname.
1166 * return value: 1: read-only loopdev was setup, 0: rw, < 0: error */
1167 extern int set_loop(char **devname, const char *file, unsigned long long offset, int ro) FAST_FUNC;
1169 /* Like bb_ask below, but asks on stdin with no timeout. */
1170 char *bb_ask_stdin(const char * prompt) FAST_FUNC;
1171 //TODO: pass buf pointer or return allocated buf (avoid statics)?
1172 char *bb_ask(const int fd, int timeout, const char * prompt) FAST_FUNC;
1173 int bb_ask_confirmation(void) FAST_FUNC;
1175 int bb_parse_mode(const char* s, mode_t* theMode) FAST_FUNC;
1178 * Config file parser
1181 PARSE_COLLAPSE = 0x00010000, // treat consecutive delimiters as one
1182 PARSE_TRIM = 0x00020000, // trim leading and trailing delimiters
1183 // TODO: COLLAPSE and TRIM seem to always go in pair
1184 PARSE_GREEDY = 0x00040000, // last token takes entire remainder of the line
1185 PARSE_MIN_DIE = 0x00100000, // die if < min tokens found
1186 // keep a copy of current line
1187 PARSE_KEEP_COPY = 0x00200000 * ENABLE_FEATURE_CROND_D,
1188 // PARSE_ESCAPE = 0x00400000, // process escape sequences in tokens
1190 // * remove leading and trailing delimiters and collapse
1191 // multiple delimiters into one
1192 // * warn and continue if less than mintokens delimiters found
1193 // * grab everything into last token
1194 PARSE_NORMAL = PARSE_COLLAPSE | PARSE_TRIM | PARSE_GREEDY,
1196 typedef struct parser_t {
1200 size_t line_alloc, nline_alloc;
1203 parser_t* config_open(const char *filename) FAST_FUNC;
1204 parser_t* config_open2(const char *filename, FILE* FAST_FUNC (*fopen_func)(const char *path)) FAST_FUNC;
1205 /* delims[0] is a comment char (use '\0' to disable), the rest are token delimiters */
1206 int config_read(parser_t *parser, char **tokens, unsigned flags, const char *delims) FAST_FUNC;
1207 #define config_read(parser, tokens, max, min, str, flags) \
1208 config_read(parser, tokens, ((flags) | (((min) & 0xFF) << 8) | ((max) & 0xFF)), str)
1209 void config_close(parser_t *parser) FAST_FUNC;
1211 /* Concatenate path and filename to new allocated buffer.
1212 * Add "/" only as needed (no duplicate "//" are produced).
1213 * If path is NULL, it is assumed to be "/".
1214 * filename should not be NULL. */
1215 char *concat_path_file(const char *path, const char *filename) FAST_FUNC;
1216 /* Returns NULL on . and .. */
1217 char *concat_subpath_file(const char *path, const char *filename) FAST_FUNC;
1220 int bb_make_directory(char *path, long mode, int flags) FAST_FUNC;
1222 int get_signum(const char *name) FAST_FUNC;
1223 const char *get_signame(int number) FAST_FUNC;
1224 void print_signames(void) FAST_FUNC;
1226 char *bb_simplify_path(const char *path) FAST_FUNC;
1227 /* Returns ptr to NUL */
1228 char *bb_simplify_abs_path_inplace(char *path) FAST_FUNC;
1230 #define LOGIN_FAIL_DELAY 3
1231 extern void bb_do_delay(int seconds) FAST_FUNC;
1232 extern void change_identity(const struct passwd *pw) FAST_FUNC;
1233 extern void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) NORETURN FAST_FUNC;
1235 /* Returns $SHELL, getpwuid(getuid())->pw_shell, or DEFAULT_SHELL.
1236 * Note that getpwuid result might need xstrdup'ing
1237 * if there is a possibility of intervening getpwxxx() calls.
1239 const char *get_shell_name(void);
1242 extern void renew_current_security_context(void) FAST_FUNC;
1243 extern void set_current_security_context(security_context_t sid) FAST_FUNC;
1244 extern context_t set_security_context_component(security_context_t cur_context,
1245 char *user, char *role, char *type, char *range) FAST_FUNC;
1246 extern void setfscreatecon_or_die(security_context_t scontext) FAST_FUNC;
1247 extern void selinux_preserve_fcontext(int fdesc) FAST_FUNC;
1249 #define selinux_preserve_fcontext(fdesc) ((void)0)
1251 extern void selinux_or_die(void) FAST_FUNC;
1254 /* systemd support */
1255 #define SD_LISTEN_FDS_START 3
1256 int sd_listen_fds(void);
1259 /* setup_environment:
1260 * if chdir pw->pw_dir: ok: else if to_tmp == 1: goto /tmp else: goto / or die
1261 * if clear_env = 1: cd(pw->pw_dir), clear environment, then set
1263 * USER=pw->pw_name, LOGNAME=pw->pw_name
1264 * PATH=bb_default_[root_]path
1267 * else if change_env = 1:
1268 * if not root (if pw->pw_uid != 0):
1269 * USER=pw->pw_name, LOGNAME=pw->pw_name
1274 #define SETUP_ENV_CHANGEENV (1 << 0)
1275 #define SETUP_ENV_CLEARENV (1 << 1)
1276 #define SETUP_ENV_TO_TMP (1 << 2)
1277 extern void setup_environment(const char *shell, int flags, const struct passwd *pw) FAST_FUNC;
1278 extern int correct_password(const struct passwd *pw) FAST_FUNC;
1279 /* Returns a malloced string */
1280 #if !ENABLE_USE_BB_CRYPT
1281 #define pw_encrypt(clear, salt, cleanup) pw_encrypt(clear, salt)
1283 extern char *pw_encrypt(const char *clear, const char *salt, int cleanup) FAST_FUNC;
1284 extern int obscure(const char *old, const char *newval, const struct passwd *pwdp) FAST_FUNC;
1286 * rnd is additional random input. New one is returned.
1287 * Useful if you call crypt_make_salt many times in a row:
1288 * rnd = crypt_make_salt(buf1, 4, 0);
1289 * rnd = crypt_make_salt(buf2, 4, rnd);
1290 * rnd = crypt_make_salt(buf3, 4, rnd);
1291 * (otherwise we risk having same salt generated)
1293 extern int crypt_make_salt(char *p, int cnt /*, int rnd*/) FAST_FUNC;
1294 /* "$N$" + sha_salt_16_bytes + NUL */
1295 #define MAX_PW_SALT_LEN (3 + 16 + 1)
1296 extern char* crypt_make_pw_salt(char p[MAX_PW_SALT_LEN], const char *algo) FAST_FUNC;
1299 /* Returns number of lines changed, or -1 on error */
1300 #if !(ENABLE_FEATURE_ADDUSER_TO_GROUP || ENABLE_FEATURE_DEL_USER_FROM_GROUP)
1301 #define update_passwd(filename, username, data, member) \
1302 update_passwd(filename, username, data)
1304 extern int update_passwd(const char *filename,
1305 const char *username,
1307 const char *member) FAST_FUNC;
1309 int index_in_str_array(const char *const string_array[], const char *key) FAST_FUNC;
1310 int index_in_strings(const char *strings, const char *key) FAST_FUNC;
1311 int index_in_substr_array(const char *const string_array[], const char *key) FAST_FUNC;
1312 int index_in_substrings(const char *strings, const char *key) FAST_FUNC;
1313 const char *nth_string(const char *strings, int n) FAST_FUNC;
1315 extern void print_login_issue(const char *issue_file, const char *tty) FAST_FUNC;
1316 extern void print_login_prompt(void) FAST_FUNC;
1318 char *xmalloc_ttyname(int fd) FAST_FUNC RETURNS_MALLOC;
1319 /* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */
1320 int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FUNC;
1322 int tcsetattr_stdin_TCSANOW(const struct termios *tp) FAST_FUNC;
1324 /* NB: "unsigned request" is crucial! "int request" will break some arches! */
1325 int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
1326 int ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
1327 #if ENABLE_IOCTL_HEX2STR_ERROR
1328 int bb_ioctl_or_warn(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
1329 int bb_xioctl(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
1330 #define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp,#request)
1331 #define xioctl(fd,request,argp) bb_xioctl(fd,request,argp,#request)
1333 int bb_ioctl_or_warn(int fd, unsigned request, void *argp) FAST_FUNC;
1334 int bb_xioctl(int fd, unsigned request, void *argp) FAST_FUNC;
1335 #define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp)
1336 #define xioctl(fd,request,argp) bb_xioctl(fd,request,argp)
1339 char *is_in_ino_dev_hashtable(const struct stat *statbuf) FAST_FUNC;
1340 void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name) FAST_FUNC;
1341 void reset_ino_dev_hashtable(void) FAST_FUNC;
1343 /* At least glibc has horrendously large inline for this, so wrap it */
1344 unsigned long long bb_makedev(unsigned major, unsigned minor) FAST_FUNC;
1346 #define makedev(a,b) bb_makedev(a,b)
1350 /* "Keycodes" that report an escape sequence.
1351 * We use something which fits into signed char,
1352 * yet doesn't represent any valid Unicode character.
1353 * Also, -1 is reserved for error indication and we don't use it. */
1361 KEYCODE_INSERT = -8,
1362 KEYCODE_DELETE = -9,
1363 KEYCODE_PAGEUP = -10,
1364 KEYCODE_PAGEDOWN = -11,
1366 KEYCODE_CTRL_UP = KEYCODE_UP & ~0x40,
1367 KEYCODE_CTRL_DOWN = KEYCODE_DOWN & ~0x40,
1368 KEYCODE_CTRL_RIGHT = KEYCODE_RIGHT & ~0x40,
1369 KEYCODE_CTRL_LEFT = KEYCODE_LEFT & ~0x40,
1380 KEYCODE_FUN10 = -21,
1381 KEYCODE_FUN11 = -22,
1382 KEYCODE_FUN12 = -23,
1384 KEYCODE_CURSOR_POS = -0x100, /* 0xfff..fff00 */
1385 /* How long is the longest ESC sequence we know?
1386 * We want it big enough to be able to contain
1387 * cursor position sequence "ESC [ 9999 ; 9999 R"
1389 KEYCODE_BUFFER_SIZE = 16
1391 /* Note: fd may be in blocking or non-blocking mode, both make sense.
1392 * For one, less uses non-blocking mode.
1393 * Only the first read syscall inside read_key may block indefinitely
1394 * (unless fd is in non-blocking mode),
1395 * subsequent reads will time out after a few milliseconds.
1396 * Return of -1 means EOF or error (errno == 0 on EOF).
1397 * buffer[0] is used as a counter of buffered chars and must be 0
1400 * -2: do not poll for input;
1401 * -1: poll(-1) (i.e. block);
1402 * >=0: poll for TIMEOUT milliseconds, return -1/EAGAIN on timeout
1404 int64_t read_key(int fd, char *buffer, int timeout) FAST_FUNC;
1405 void read_key_ungets(char *buffer, const char *str, unsigned len) FAST_FUNC;
1408 #if ENABLE_FEATURE_EDITING
1409 /* It's NOT just ENABLEd or disabled. It's a number: */
1410 # if defined CONFIG_FEATURE_EDITING_HISTORY && CONFIG_FEATURE_EDITING_HISTORY > 0
1411 # define MAX_HISTORY (CONFIG_FEATURE_EDITING_HISTORY + 0)
1412 unsigned size_from_HISTFILESIZE(const char *hp);
1414 # define MAX_HISTORY 0
1416 typedef struct line_input_t {
1418 const char *path_lookup;
1422 int max_history; /* must never be <= 0 */
1423 # if ENABLE_FEATURE_EDITING_SAVEHISTORY
1424 /* meaning of this field depends on FEATURE_EDITING_SAVE_ON_EXIT:
1425 * if !FEATURE_EDITING_SAVE_ON_EXIT: "how many lines are
1426 * in on-disk history"
1427 * if FEATURE_EDITING_SAVE_ON_EXIT: "how many in-memory lines are
1428 * also in on-disk history (and thus need to be skipped on save)"
1430 unsigned cnt_history_in_file;
1431 const char *hist_file;
1433 char *history[MAX_HISTORY + 1];
1437 DO_HISTORY = 1 * (MAX_HISTORY > 0),
1438 TAB_COMPLETION = 2 * ENABLE_FEATURE_TAB_COMPLETION,
1439 USERNAME_COMPLETION = 4 * ENABLE_FEATURE_USERNAME_COMPLETION,
1440 VI_MODE = 8 * ENABLE_FEATURE_EDITING_VI,
1441 WITH_PATH_LOOKUP = 0x10,
1442 FOR_SHELL = DO_HISTORY | TAB_COMPLETION | USERNAME_COMPLETION,
1444 line_input_t *new_line_input_t(int flags) FAST_FUNC;
1445 /* So far static: void free_line_input_t(line_input_t *n) FAST_FUNC; */
1447 * maxsize must be >= 2.
1449 * -1 on read errors or EOF, or on bare Ctrl-D,
1450 * 0 on ctrl-C (the line entered is still returned in 'command'),
1451 * >0 length of input string, including terminating '\n'
1453 int read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout) FAST_FUNC;
1454 # if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1455 void save_history(line_input_t *st);
1458 #define MAX_HISTORY 0
1459 int read_line_input(const char* prompt, char* command, int maxsize) FAST_FUNC;
1460 #define read_line_input(state, prompt, command, maxsize, timeout) \
1461 read_line_input(prompt, command, maxsize)
1466 # ifdef TASK_COMM_LEN
1467 enum { COMM_LEN = TASK_COMM_LEN };
1469 /* synchronize with sizeof(task_struct.comm) in /usr/include/linux/sched.h */
1470 enum { COMM_LEN = 16 };
1475 unsigned long mapped_rw;
1476 unsigned long mapped_ro;
1477 unsigned long shared_clean;
1478 unsigned long shared_dirty;
1479 unsigned long private_clean;
1480 unsigned long private_dirty;
1481 unsigned long stack;
1482 unsigned long smap_pss, smap_swap;
1483 unsigned long smap_size;
1484 unsigned long smap_start;
1490 #define procps_read_smaps(pid, total, cb, data) \
1491 procps_read_smaps(pid, total)
1493 int FAST_FUNC procps_read_smaps(pid_t pid, struct smaprec *total,
1494 void (*cb)(struct smaprec *, void *), void *data);
1496 typedef struct procps_status_t {
1498 IF_FEATURE_SHOW_THREADS(DIR *task_dir;)
1499 uint8_t shift_pages_to_bytes;
1500 uint8_t shift_pages_to_kb;
1501 /* Fields are set to 0/NULL if failed to determine (or not requested) */
1505 IF_SELINUX(char *context;)
1506 IF_FEATURE_SHOW_THREADS(unsigned main_thread_pid;)
1507 /* Everything below must contain no ptrs to malloc'ed data:
1508 * it is memset(0) for each process in procps_scan() */
1509 unsigned long vsz, rss; /* we round it to kbytes */
1510 unsigned long stime, utime;
1511 unsigned long start_time;
1518 #if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
1523 unsigned tty_major,tty_minor;
1524 #if ENABLE_FEATURE_TOPMEM
1525 struct smaprec smaps;
1528 /* basename of executable in exec(2), read from /proc/N/stat
1529 * (if executable is symlink or script, it is NOT replaced
1530 * by link target or interpreter name) */
1531 char comm[COMM_LEN];
1532 /* user/group? - use passwd/group parsing functions */
1533 #if ENABLE_FEATURE_TOP_SMP_PROCESS
1534 int last_seen_on_cpu;
1537 /* flag bits for procps_scan(xx, flags) calls */
1539 PSSCAN_PID = 1 << 0,
1540 PSSCAN_PPID = 1 << 1,
1541 PSSCAN_PGID = 1 << 2,
1542 PSSCAN_SID = 1 << 3,
1543 PSSCAN_UIDGID = 1 << 4,
1544 PSSCAN_COMM = 1 << 5,
1545 /* PSSCAN_CMD = 1 << 6, - use read_cmdline instead */
1546 PSSCAN_ARGV0 = 1 << 7,
1547 PSSCAN_EXE = 1 << 8,
1548 PSSCAN_STATE = 1 << 9,
1549 PSSCAN_VSZ = 1 << 10,
1550 PSSCAN_RSS = 1 << 11,
1551 PSSCAN_STIME = 1 << 12,
1552 PSSCAN_UTIME = 1 << 13,
1553 PSSCAN_TTY = 1 << 14,
1554 PSSCAN_SMAPS = (1 << 15) * ENABLE_FEATURE_TOPMEM,
1555 /* NB: used by find_pid_by_name(). Any applet using it
1556 * needs to be mentioned here. */
1557 PSSCAN_ARGVN = (1 << 16) * (ENABLE_KILLALL
1558 || ENABLE_PGREP || ENABLE_PKILL
1562 PSSCAN_CONTEXT = (1 << 17) * ENABLE_SELINUX,
1563 PSSCAN_START_TIME = 1 << 18,
1564 PSSCAN_CPU = (1 << 19) * ENABLE_FEATURE_TOP_SMP_PROCESS,
1565 PSSCAN_NICE = (1 << 20) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
1566 PSSCAN_RUIDGID = (1 << 21) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
1567 PSSCAN_TASKS = (1 << 22) * ENABLE_FEATURE_SHOW_THREADS,
1569 //procps_status_t* alloc_procps_scan(void) FAST_FUNC;
1570 void free_procps_scan(procps_status_t* sp) FAST_FUNC;
1571 procps_status_t* procps_scan(procps_status_t* sp, int flags) FAST_FUNC;
1572 /* Format cmdline (up to col chars) into char buf[size] */
1573 /* Puts [comm] if cmdline is empty (-> process is a kernel thread) */
1574 void read_cmdline(char *buf, int size, unsigned pid, const char *comm) FAST_FUNC;
1575 pid_t *find_pid_by_name(const char* procName) FAST_FUNC;
1576 pid_t *pidlist_reverse(pid_t *pidList) FAST_FUNC;
1577 int starts_with_cpu(const char *str) FAST_FUNC;
1578 unsigned get_cpu_count(void) FAST_FUNC;
1581 /* Use strict=1 if you process input from untrusted source:
1582 * it will return NULL on invalid %xx (bad hex chars)
1583 * and str + 1 if decoded char is / or NUL.
1584 * In non-strict mode, it always succeeds (returns str),
1585 * and also it additionally decoded '+' to space.
1587 char *percent_decode_in_place(char *str, int strict) FAST_FUNC;
1590 extern const char bb_uuenc_tbl_base64[];
1591 extern const char bb_uuenc_tbl_std[];
1592 void bb_uuencode(char *store, const void *s, int length, const char *tbl) FAST_FUNC;
1594 BASE64_FLAG_UU_STOP = 0x100,
1595 /* Sign-extends to a value which never matches fgetc result: */
1596 BASE64_FLAG_NO_STOP_CHAR = 0x80,
1598 void FAST_FUNC read_base64(FILE *src_stream, FILE *dst_stream, int flags);
1600 typedef struct md5_ctx_t {
1601 uint8_t wbuffer[64]; /* always correctly aligned for uint64_t */
1602 void (*process_block)(struct md5_ctx_t*) FAST_FUNC;
1603 uint64_t total64; /* must be directly before hash[] */
1604 uint32_t hash[8]; /* 4 elements for md5, 5 for sha1, 8 for sha256 */
1606 typedef struct md5_ctx_t sha1_ctx_t;
1607 typedef struct md5_ctx_t sha256_ctx_t;
1608 typedef struct sha512_ctx_t {
1609 uint64_t total64[2]; /* must be directly before hash[] */
1611 uint8_t wbuffer[128]; /* always correctly aligned for uint64_t */
1613 void md5_begin(md5_ctx_t *ctx) FAST_FUNC;
1614 void md5_hash(md5_ctx_t *ctx, const void *data, size_t length) FAST_FUNC;
1615 void md5_end(md5_ctx_t *ctx, void *resbuf) FAST_FUNC;
1616 void sha1_begin(sha1_ctx_t *ctx) FAST_FUNC;
1617 #define sha1_hash md5_hash
1618 void sha1_end(sha1_ctx_t *ctx, void *resbuf) FAST_FUNC;
1619 void sha256_begin(sha256_ctx_t *ctx) FAST_FUNC;
1620 #define sha256_hash md5_hash
1621 #define sha256_end sha1_end
1622 void sha512_begin(sha512_ctx_t *ctx) FAST_FUNC;
1623 void sha512_hash(sha512_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC;
1624 void sha512_end(sha512_ctx_t *ctx, void *resbuf) FAST_FUNC;
1626 extern uint32_t *global_crc32_table;
1627 uint32_t *crc32_filltable(uint32_t *tbl256, int endian) FAST_FUNC;
1628 uint32_t crc32_block_endian1(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC;
1629 uint32_t crc32_block_endian0(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC;
1631 typedef struct masks_labels_t {
1635 int print_flags_separated(const int *masks, const char *labels,
1636 int flags, const char *separator) FAST_FUNC;
1637 int print_flags(const masks_labels_t *ml, int flags) FAST_FUNC;
1639 typedef struct bb_progress_t {
1641 unsigned last_update_sec;
1642 unsigned last_change_sec;
1644 const char *curfile;
1647 #define is_bb_progress_inited(p) ((p)->curfile != NULL)
1648 #define bb_progress_free(p) do { \
1649 if (ENABLE_UNICODE_SUPPORT) free((char*)((p)->curfile)); \
1650 (p)->curfile = NULL; \
1652 void bb_progress_init(bb_progress_t *p, const char *curfile) FAST_FUNC;
1653 void bb_progress_update(bb_progress_t *p,
1656 uoff_t totalsize) FAST_FUNC;
1659 extern const char *applet_name;
1661 /* Some older linkers don't perform string merging, we used to have common strings
1662 * as global arrays to do it by hand. But:
1663 * (1) newer linkers do it themselves,
1664 * (2) however, they DONT merge string constants with global arrays,
1665 * even if the value is the same (!). Thus global arrays actually
1666 * increased size a bit: for example, "/etc/passwd" string from libc
1667 * wasn't merged with bb_path_passwd_file[] array!
1668 * Therefore now we use #defines.
1670 /* "BusyBox vN.N.N (timestamp or extra_version)" */
1671 extern const char bb_banner[];
1672 extern const char bb_msg_memory_exhausted[];
1673 extern const char bb_msg_invalid_date[];
1674 #define bb_msg_read_error "read error"
1675 #define bb_msg_write_error "write error"
1676 extern const char bb_msg_unknown[];
1677 extern const char bb_msg_can_not_create_raw_socket[];
1678 extern const char bb_msg_perm_denied_are_you_root[];
1679 extern const char bb_msg_you_must_be_root[];
1680 extern const char bb_msg_requires_arg[];
1681 extern const char bb_msg_invalid_arg[];
1682 extern const char bb_msg_standard_input[];
1683 extern const char bb_msg_standard_output[];
1685 /* NB: (bb_hexdigits_upcase[i] | 0x20) -> lowercase hex digit */
1686 extern const char bb_hexdigits_upcase[];
1688 extern const char bb_path_wtmp_file[];
1690 /* Busybox mount uses either /proc/mounts or /etc/mtab to
1691 * get the list of currently mounted filesystems */
1692 #define bb_path_mtab_file IF_FEATURE_MTAB_SUPPORT("/etc/mtab")IF_NOT_FEATURE_MTAB_SUPPORT("/proc/mounts")
1694 #define bb_path_passwd_file _PATH_PASSWD
1695 #define bb_path_group_file _PATH_GROUP
1696 #define bb_path_shadow_file _PATH_SHADOW
1697 #define bb_path_gshadow_file _PATH_GSHADOW
1699 #define bb_path_motd_file "/etc/motd"
1701 #define bb_dev_null "/dev/null"
1702 extern const char bb_busybox_exec_path[];
1703 /* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin,
1704 * but I want to save a few bytes here */
1705 extern const char bb_PATH_root_path[]; /* "PATH=/sbin:/usr/sbin:/bin:/usr/bin" */
1706 #define bb_default_root_path (bb_PATH_root_path + sizeof("PATH"))
1707 #define bb_default_path (bb_PATH_root_path + sizeof("PATH=/sbin:/usr/sbin"))
1709 extern const int const_int_0;
1710 extern const int const_int_1;
1713 /* Providing hard guarantee on minimum size (think of BUFSIZ == 128) */
1714 enum { COMMON_BUFSIZE = (BUFSIZ >= 256*sizeof(void*) ? BUFSIZ+1 : 256*sizeof(void*)) };
1715 extern char bb_common_bufsiz1[COMMON_BUFSIZE];
1716 /* This struct is deliberately not defined. */
1717 /* See docs/keep_data_small.txt */
1719 /* '*const' ptr makes gcc optimize code much better.
1720 * Magic prevents ptr_to_globals from going into rodata.
1721 * If you want to assign a value, use SET_PTR_TO_GLOBALS(x) */
1722 extern struct globals *const ptr_to_globals;
1723 /* At least gcc 3.4.6 on mipsel system needs optimization barrier */
1724 #define barrier() __asm__ __volatile__("":::"memory")
1725 #define SET_PTR_TO_GLOBALS(x) do { \
1726 (*(struct globals**)&ptr_to_globals) = (void*)(x); \
1730 /* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it,
1731 * use bb_default_login_shell and following defines.
1732 * If you change LIBBB_DEFAULT_LOGIN_SHELL,
1733 * don't forget to change increment constant. */
1734 #define LIBBB_DEFAULT_LOGIN_SHELL "-/bin/sh"
1735 extern const char bb_default_login_shell[];
1737 #define DEFAULT_SHELL (bb_default_login_shell+1)
1739 #define DEFAULT_SHELL_SHORT_NAME (bb_default_login_shell+6)
1741 /* The following devices are the same on all systems. */
1742 #define CURRENT_TTY "/dev/tty"
1743 #define DEV_CONSOLE "/dev/console"
1745 #if defined(__FreeBSD_kernel__)
1746 # define CURRENT_VC CURRENT_TTY
1747 # define VC_1 "/dev/ttyv0"
1748 # define VC_2 "/dev/ttyv1"
1749 # define VC_3 "/dev/ttyv2"
1750 # define VC_4 "/dev/ttyv3"
1751 # define VC_5 "/dev/ttyv4"
1752 # define VC_FORMAT "/dev/ttyv%d"
1753 #elif defined(__GNU__)
1754 # define CURRENT_VC CURRENT_TTY
1755 # define VC_1 "/dev/tty1"
1756 # define VC_2 "/dev/tty2"
1757 # define VC_3 "/dev/tty3"
1758 # define VC_4 "/dev/tty4"
1759 # define VC_5 "/dev/tty5"
1760 # define VC_FORMAT "/dev/tty%d"
1761 #elif ENABLE_FEATURE_DEVFS
1762 /*Linux, obsolete devfs names */
1763 # define CURRENT_VC "/dev/vc/0"
1764 # define VC_1 "/dev/vc/1"
1765 # define VC_2 "/dev/vc/2"
1766 # define VC_3 "/dev/vc/3"
1767 # define VC_4 "/dev/vc/4"
1768 # define VC_5 "/dev/vc/5"
1769 # define VC_FORMAT "/dev/vc/%d"
1770 # define LOOP_FORMAT "/dev/loop/%d"
1771 # define LOOP_NAMESIZE (sizeof("/dev/loop/") + sizeof(int)*3 + 1)
1772 # define LOOP_NAME "/dev/loop/"
1773 # define FB_0 "/dev/fb/0"
1775 /*Linux, normal names */
1776 # define CURRENT_VC "/dev/tty0"
1777 # define VC_1 "/dev/tty1"
1778 # define VC_2 "/dev/tty2"
1779 # define VC_3 "/dev/tty3"
1780 # define VC_4 "/dev/tty4"
1781 # define VC_5 "/dev/tty5"
1782 # define VC_FORMAT "/dev/tty%d"
1783 # define LOOP_FORMAT "/dev/loop%d"
1784 # define LOOP_NAMESIZE (sizeof("/dev/loop") + sizeof(int)*3 + 1)
1785 # define LOOP_NAME "/dev/loop"
1786 # define FB_0 "/dev/fb0"
1790 #define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0])))
1793 /* We redefine ctype macros. Unicode-correct handling of char types
1794 * can't be done with such byte-oriented operations anyway,
1795 * we don't lose anything.
1813 /* We save ~500 bytes on isdigit alone.
1814 * BTW, x86 likes (unsigned char) cast more than (unsigned). */
1816 /* These work the same for ASCII and Unicode,
1817 * assuming no one asks "is this a *Unicode* letter?" using isalpha(letter) */
1818 #define isascii(a) ((unsigned char)(a) <= 0x7f)
1819 #define isdigit(a) ((unsigned char)((a) - '0') <= 9)
1820 #define isupper(a) ((unsigned char)((a) - 'A') <= ('Z' - 'A'))
1821 #define islower(a) ((unsigned char)((a) - 'a') <= ('z' - 'a'))
1822 #define isalpha(a) ((unsigned char)(((a)|0x20) - 'a') <= ('z' - 'a'))
1823 #define isblank(a) ({ unsigned char bb__isblank = (a); bb__isblank == ' ' || bb__isblank == '\t'; })
1824 #define iscntrl(a) ({ unsigned char bb__iscntrl = (a); bb__iscntrl < ' ' || bb__iscntrl == 0x7f; })
1825 /* In POSIX/C locale isspace is only these chars: "\t\n\v\f\r" and space.
1826 * "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13.
1828 #define isspace(a) ({ unsigned char bb__isspace = (a) - 9; bb__isspace == (' ' - 9) || bb__isspace <= (13 - 9); })
1829 // Unsafe wrt NUL: #define ispunct(a) (strchr("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a)) != NULL)
1830 #define ispunct(a) (strchrnul("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a))[0])
1831 // Bigger code: #define isalnum(a) ({ unsigned char bb__isalnum = (a) - '0'; bb__isalnum <= 9 || ((bb__isalnum - ('A' - '0')) & 0xdf) <= 25; })
1832 #define isalnum(a) bb_ascii_isalnum(a)
1833 static ALWAYS_INLINE int bb_ascii_isalnum(unsigned char a)
1835 unsigned char b = a - '0';
1839 return b <= 'z' - 'a';
1841 #define isxdigit(a) bb_ascii_isxdigit(a)
1842 static ALWAYS_INLINE int bb_ascii_isxdigit(unsigned char a)
1844 unsigned char b = a - '0';
1848 return b <= 'f' - 'a';
1850 #define toupper(a) bb_ascii_toupper(a)
1851 static ALWAYS_INLINE unsigned char bb_ascii_toupper(unsigned char a)
1853 unsigned char b = a - 'a';
1854 if (b <= ('z' - 'a'))
1858 #define tolower(a) bb_ascii_tolower(a)
1859 static ALWAYS_INLINE unsigned char bb_ascii_tolower(unsigned char a)
1861 unsigned char b = a - 'A';
1862 if (b <= ('Z' - 'A'))
1867 /* In ASCII and Unicode, these are likely to be very different.
1868 * Let's prevent ambiguous usage from the start */
1869 #define isgraph(a) isgraph_is_ambiguous_dont_use(a)
1870 #define isprint(a) isprint_is_ambiguous_dont_use(a)
1871 /* NB: must not treat EOF as isgraph or isprint */
1872 #define isgraph_asciionly(a) ((unsigned)((a) - 0x21) <= 0x7e - 0x21)
1873 #define isprint_asciionly(a) ((unsigned)((a) - 0x20) <= 0x7e - 0x20)
1876 POP_SAVED_FUNCTION_VISIBILITY