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 the GPL.
8 * Licensed under the GPL version 2, see the file LICENSE in this tarball.
30 #include <sys/ioctl.h>
32 #include <sys/socket.h>
35 #include <sys/types.h>
40 /* Try to pull in PATH_MAX */
42 #include <sys/param.h>
46 #ifdef HAVE_SYS_STATFS_H
47 #include <sys/statfs.h>
50 #include <selinux/selinux.h>
51 #include <selinux/context.h>
52 #include <selinux/flask.h>
53 #include <selinux/av_permissions.h>
55 #if ENABLE_LOCALE_SUPPORT
58 # define setlocale(x,y) ((void)0)
65 #if ENABLE_FEATURE_SHADOWPASSWDS
66 # if !ENABLE_USE_BB_SHADOW
67 /* If using busybox's shadow implementation, do not include the shadow.h
68 * header as the toolchain may not provide it at all.
73 #if defined __FreeBSD__
74 # include <netinet/in.h>
75 # include <arpa/inet.h>
76 #elif defined __APPLE__
77 # include <netinet/in.h>
79 # include <arpa/inet.h>
80 # if !defined(__socklen_t_defined) && !defined(_SOCKLEN_T_DECLARED)
81 /* We #define socklen_t *after* includes, otherwise we get
82 * typedef redefinition errors from system headers
83 * (in case "is it defined already" detection above failed)
85 # define socklen_t bb_socklen_t
86 typedef unsigned socklen_t;
91 /* Some libc's forget to declare these, do it ourself */
93 extern char **environ;
94 #if defined(__GLIBC__) && __GLIBC__ < 2
95 int vdprintf(int d, const char *format, va_list ap);
97 /* klogctl is in libc's klog.h, but we cheat and not #include that */
98 int klogctl(int type, char *b, int len);
99 /* This is declared here rather than #including <libgen.h> in order to avoid
100 * confusing the two versions of basename. See the dirname/basename man page
102 #if !defined __FreeBSD__
103 char *dirname(char *path);
105 /* Include our own copy of struct sysinfo to avoid binary compatibility
106 * problems with Linux 2.4, which changed things. Grumble, grumble. */
108 long uptime; /* Seconds since boot */
109 unsigned long loads[3]; /* 1, 5, and 15 minute load averages */
110 unsigned long totalram; /* Total usable main memory size */
111 unsigned long freeram; /* Available memory size */
112 unsigned long sharedram; /* Amount of shared memory */
113 unsigned long bufferram; /* Memory used by buffers */
114 unsigned long totalswap; /* Total swap space size */
115 unsigned long freeswap; /* swap space still available */
116 unsigned short procs; /* Number of current processes */
117 unsigned short pad; /* Padding needed for m68k */
118 unsigned long totalhigh; /* Total high memory size */
119 unsigned long freehigh; /* Available high memory size */
120 unsigned int mem_unit; /* Memory unit size in bytes */
121 char _f[20 - 2 * sizeof(long) - sizeof(int)]; /* Padding: libc5 uses this.. */
123 int sysinfo(struct sysinfo* info);
125 # define PATH_MAX 256
132 /* Make all declarations hidden (-fvisibility flag only affects definitions) */
133 /* (don't include system headers after this until corresponding pop!) */
134 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
137 #if ENABLE_USE_BB_PWD_GRP
141 #if ENABLE_FEATURE_SHADOWPASSWDS
142 # if ENABLE_USE_BB_SHADOW
143 # include "shadow_.h"
147 /* Tested to work correctly with all int types (IIRC :]) */
148 #define MAXINT(T) (T)( \
151 : (T)~((T)1 << (sizeof(T)*8-1)) \
154 #define MININT(T) (T)( \
157 : ((T)1 << (sizeof(T)*8-1)) \
160 /* Large file support */
161 /* Note that CONFIG_LFS=y forces bbox to be built with all common ops
162 * (stat, lseek etc) mapped to "largefile" variants by libc.
163 * Practically it means that open() automatically has O_LARGEFILE added
164 * and all filesize/file_offset parameters and struct members are "large"
165 * (in today's world - signed 64bit). For full support of large files,
166 * we need a few helper #defines (below) and careful use of off_t
167 * instead of int/ssize_t. No lseek64(), O_LARGEFILE etc necessary */
169 /* CONFIG_LFS is on */
170 # if ULONG_MAX > 0xffffffff
171 /* "long" is long enough on this system */
172 typedef unsigned long uoff_t;
173 # define XATOOFF(a) xatoul_range(a, 0, LONG_MAX)
174 /* usage: sz = BB_STRTOOFF(s, NULL, 10); if (errno || sz < 0) die(); */
175 # define BB_STRTOOFF bb_strtoul
176 # define STRTOOFF strtoul
177 /* usage: printf("size: %"OFF_FMT"d (%"OFF_FMT"x)\n", sz, sz); */
180 /* "long" is too short, need "long long" */
181 typedef unsigned long long uoff_t;
182 # define XATOOFF(a) xatoull_range(a, 0, LLONG_MAX)
183 # define BB_STRTOOFF bb_strtoull
184 # define STRTOOFF strtoull
185 # define OFF_FMT "ll"
188 /* CONFIG_LFS is off */
189 # if UINT_MAX == 0xffffffff
190 /* While sizeof(off_t) == sizeof(int), off_t is typedef'ed to long anyway.
191 * gcc will throw warnings on printf("%d", off_t). Crap... */
192 typedef unsigned long uoff_t;
193 # define XATOOFF(a) xatoi_u(a)
194 # define BB_STRTOOFF bb_strtou
195 # define STRTOOFF strtol
198 typedef unsigned long uoff_t;
199 # define XATOOFF(a) xatoul_range(a, 0, LONG_MAX)
200 # define BB_STRTOOFF bb_strtoul
201 # define STRTOOFF strtol
205 /* scary. better ideas? (but do *test* them first!) */
206 #define OFF_T_MAX ((off_t)~((off_t)1 << (sizeof(off_t)*8-1)))
208 /* Some useful definitions */
210 #define FALSE ((int) 0)
212 #define TRUE ((int) 1)
214 #define SKIP ((int) 2)
217 #define MTAB_GETMOUNTPT '1'
218 #define MTAB_GETDEVICE '2'
220 #define BUF_SIZE 8192
221 #define EXPAND_ALLOC 1024
223 /* Macros for min/max. */
225 #define MIN(a,b) (((a)<(b))?(a):(b))
229 #define MAX(a,b) (((a)>(b))?(a):(b))
232 /* buffer allocation schemes */
233 #if ENABLE_FEATURE_BUFFERS_GO_ON_STACK
234 #define RESERVE_CONFIG_BUFFER(buffer,len) char buffer[len]
235 #define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char buffer[len]
236 #define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
238 #if ENABLE_FEATURE_BUFFERS_GO_IN_BSS
239 #define RESERVE_CONFIG_BUFFER(buffer,len) static char buffer[len]
240 #define RESERVE_CONFIG_UBUFFER(buffer,len) static unsigned char buffer[len]
241 #define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
243 #define RESERVE_CONFIG_BUFFER(buffer,len) char *buffer = xmalloc(len)
244 #define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char *buffer = xmalloc(len)
245 #define RELEASE_CONFIG_BUFFER(buffer) free(buffer)
249 #if defined(__GLIBC__)
250 /* glibc uses __errno_location() to get a ptr to errno */
251 /* We can just memorize it once - no multithreading in busybox :) */
252 extern int *const bb_errno;
254 #define errno (*bb_errno)
257 unsigned long long monotonic_ns(void) FAST_FUNC;
258 unsigned long long monotonic_us(void) FAST_FUNC;
259 unsigned long long monotonic_ms(void) FAST_FUNC;
260 unsigned monotonic_sec(void) FAST_FUNC;
262 extern void chomp(char *s) FAST_FUNC;
263 extern void trim(char *s) FAST_FUNC;
264 extern char *skip_whitespace(const char *) FAST_FUNC;
265 extern char *skip_non_whitespace(const char *) FAST_FUNC;
266 extern char *skip_dev_pfx(const char *tty_name) FAST_FUNC;
268 extern char *strrstr(const char *haystack, const char *needle) FAST_FUNC;
270 //TODO: supply a pointer to char[11] buffer (avoid statics)?
271 extern const char *bb_mode_string(mode_t mode) FAST_FUNC;
272 extern int is_directory(const char *name, int followLinks, struct stat *statBuf) FAST_FUNC;
273 enum { /* DO NOT CHANGE THESE VALUES! cp.c, mv.c, install.c depend on them. */
274 FILEUTILS_PRESERVE_STATUS = 1 << 0, /* -p */
275 FILEUTILS_DEREFERENCE = 1 << 1, /* !-d */
276 FILEUTILS_RECUR = 1 << 2, /* -R */
277 FILEUTILS_FORCE = 1 << 3, /* -f */
278 FILEUTILS_INTERACTIVE = 1 << 4, /* -i */
279 FILEUTILS_MAKE_HARDLINK = 1 << 5, /* -l */
280 FILEUTILS_MAKE_SOFTLINK = 1 << 6, /* -s */
281 FILEUTILS_DEREF_SOFTLINK = 1 << 7, /* -L */
282 FILEUTILS_DEREFERENCE_L0 = 1 << 8, /* -H */
284 FILEUTILS_PRESERVE_SECURITY_CONTEXT = 1 << 9, /* -c */
285 FILEUTILS_SET_SECURITY_CONTEXT = 1 << 10,
288 #define FILEUTILS_CP_OPTSTR "pdRfilsLH" IF_SELINUX("c")
289 extern int remove_file(const char *path, int flags) FAST_FUNC;
290 /* NB: without FILEUTILS_RECUR in flags, it will basically "cat"
291 * the source, not copy (unless "source" is a directory).
292 * This makes "cp /dev/null file" and "install /dev/null file" (!!!)
293 * work coreutils-compatibly. */
294 extern int copy_file(const char *source, const char *dest, int flags) FAST_FUNC;
297 ACTION_RECURSE = (1 << 0),
298 ACTION_FOLLOWLINKS = (1 << 1),
299 ACTION_FOLLOWLINKS_L0 = (1 << 2),
300 ACTION_DEPTHFIRST = (1 << 3),
301 /*ACTION_REVERSE = (1 << 4), - unused */
302 ACTION_QUIET = (1 << 5),
303 ACTION_DANGLING_OK = (1 << 6),
305 typedef uint8_t recurse_flags_t;
306 extern int recursive_action(const char *fileName, unsigned flags,
307 int FAST_FUNC (*fileAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
308 int FAST_FUNC (*dirAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
309 void* userData, unsigned depth) FAST_FUNC;
310 extern int device_open(const char *device, int mode) FAST_FUNC;
311 enum { GETPTY_BUFSIZE = 16 }; /* more than enough for "/dev/ttyXXX" */
312 extern int xgetpty(char *line) FAST_FUNC;
313 extern int get_console_fd_or_die(void) FAST_FUNC;
314 extern void console_make_active(int fd, const int vt_num) FAST_FUNC;
315 extern char *find_block_device(const char *path) FAST_FUNC;
316 /* bb_copyfd_XX print read/write errors and return -1 if they occur */
317 extern off_t bb_copyfd_eof(int fd1, int fd2) FAST_FUNC;
318 extern off_t bb_copyfd_size(int fd1, int fd2, off_t size) FAST_FUNC;
319 extern void bb_copyfd_exact_size(int fd1, int fd2, off_t size) FAST_FUNC;
320 /* "short" copy can be detected by return value < size */
321 /* this helper yells "short read!" if param is not -1 */
322 extern void complain_copyfd_and_die(off_t sz) NORETURN FAST_FUNC;
323 extern char bb_process_escape_sequence(const char **ptr) FAST_FUNC;
324 /* xxxx_strip version can modify its parameter:
328 * "abc/def/" -> "def" !!
330 extern char *bb_get_last_path_component_strip(char *path) FAST_FUNC;
331 /* "abc/def/" -> "" and it never modifies 'path' */
332 extern char *bb_get_last_path_component_nostrip(const char *path) FAST_FUNC;
334 int ndelay_on(int fd) FAST_FUNC;
335 int ndelay_off(int fd) FAST_FUNC;
336 int close_on_exec_on(int fd) FAST_FUNC;
337 void xdup2(int, int) FAST_FUNC;
338 void xmove_fd(int, int) FAST_FUNC;
341 DIR *xopendir(const char *path) FAST_FUNC;
342 DIR *warn_opendir(const char *path) FAST_FUNC;
344 char *xmalloc_realpath(const char *path) FAST_FUNC RETURNS_MALLOC;
345 char *xmalloc_readlink(const char *path) FAST_FUNC RETURNS_MALLOC;
346 char *xmalloc_readlink_or_warn(const char *path) FAST_FUNC RETURNS_MALLOC;
347 /* !RETURNS_MALLOC: it's a realloc-like function */
348 char *xrealloc_getcwd_or_warn(char *cwd) FAST_FUNC;
350 char *xmalloc_follow_symlinks(const char *path) FAST_FUNC RETURNS_MALLOC;
354 /* bb_signals(BB_FATAL_SIGS, handler) catches all signals which
355 * otherwise would kill us, except for those resulting from bugs:
356 * SIGSEGV, SIGILL, SIGFPE.
357 * Other fatal signals not included (TODO?):
358 * SIGBUS Bus error (bad memory access)
359 * SIGPOLL Pollable event. Synonym of SIGIO
360 * SIGPROF Profiling timer expired
361 * SIGSYS Bad argument to routine
362 * SIGTRAP Trace/breakpoint trap
364 * The only known arch with some of these sigs not fitting
365 * into 32 bits is parisc (SIGXCPU=33, SIGXFSZ=34, SIGSTKFLT=36).
366 * Dance around with long long to guard against that...
368 BB_FATAL_SIGS = (int)(0
372 + (1LL << SIGPIPE) // Write to pipe with no readers
373 + (1LL << SIGQUIT) // Quit from keyboard
374 + (1LL << SIGABRT) // Abort signal from abort(3)
375 + (1LL << SIGALRM) // Timer signal from alarm(2)
376 + (1LL << SIGVTALRM) // Virtual alarm clock
377 + (1LL << SIGXCPU) // CPU time limit exceeded
378 + (1LL << SIGXFSZ) // File size limit exceeded
379 + (1LL << SIGUSR1) // Yes kids, these are also fatal!
383 void bb_signals(int sigs, void (*f)(int)) FAST_FUNC;
384 /* Unlike signal() and bb_signals, sets handler with sigaction()
385 * and in a way that while signal handler is run, no other signals
386 * will be blocked; syscalls will not be restarted: */
387 void bb_signals_recursive_norestart(int sigs, void (*f)(int)) FAST_FUNC;
388 /* syscalls like read() will be interrupted with EINTR: */
389 void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
390 /* syscalls like read() won't be interrupted (though select/poll will be): */
391 void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
392 void wait_for_any_sig(void) FAST_FUNC;
393 void kill_myself_with_sig(int sig) NORETURN FAST_FUNC;
394 void sig_block(int sig) FAST_FUNC;
395 void sig_unblock(int sig) FAST_FUNC;
396 /* Will do sigaction(signum, act, NULL): */
397 int sigaction_set(int sig, const struct sigaction *act) FAST_FUNC;
398 /* SIG_BLOCK/SIG_UNBLOCK all signals: */
399 int sigprocmask_allsigs(int how) FAST_FUNC;
400 /* Standard handler which just records signo */
401 extern smallint bb_got_signal;
402 void record_signo(int signo); /* not FAST_FUNC! */
405 void xsetgid(gid_t gid) FAST_FUNC;
406 void xsetuid(uid_t uid) FAST_FUNC;
407 void xchdir(const char *path) FAST_FUNC;
408 void xchroot(const char *path) FAST_FUNC;
409 void xsetenv(const char *key, const char *value) FAST_FUNC;
410 void bb_unsetenv(const char *key) FAST_FUNC;
411 void xunlink(const char *pathname) FAST_FUNC;
412 void xstat(const char *pathname, struct stat *buf) FAST_FUNC;
413 int xopen(const char *pathname, int flags) FAST_FUNC;
414 int xopen_nonblocking(const char *pathname) FAST_FUNC;
415 int xopen3(const char *pathname, int flags, int mode) FAST_FUNC;
416 int open_or_warn(const char *pathname, int flags) FAST_FUNC;
417 int open3_or_warn(const char *pathname, int flags, int mode) FAST_FUNC;
418 int open_or_warn_stdin(const char *pathname) FAST_FUNC;
419 void xrename(const char *oldpath, const char *newpath) FAST_FUNC;
420 int rename_or_warn(const char *oldpath, const char *newpath) FAST_FUNC;
421 off_t xlseek(int fd, off_t offset, int whence) FAST_FUNC;
422 off_t fdlength(int fd) FAST_FUNC;
424 uoff_t FAST_FUNC get_volume_size_in_bytes(int fd,
425 const char *override,
426 unsigned override_units,
429 void xpipe(int filedes[2]) FAST_FUNC;
430 /* In this form code with pipes is much more readable */
431 struct fd_pair { int rd; int wr; };
432 #define piped_pair(pair) pipe(&((pair).rd))
433 #define xpiped_pair(pair) xpipe(&((pair).rd))
435 /* Useful for having small structure members/global variables */
436 typedef int8_t socktype_t;
437 typedef int8_t family_t;
438 struct BUG_too_small {
439 char BUG_socktype_t_too_small[(0
446 char BUG_family_t_too_small[(0
463 void parse_datestr(const char *date_str, struct tm *ptm) FAST_FUNC;
464 time_t validate_tm_time(const char *date_str, struct tm *ptm) FAST_FUNC;
467 int xsocket(int domain, int type, int protocol) FAST_FUNC;
468 void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen) FAST_FUNC;
469 void xlisten(int s, int backlog) FAST_FUNC;
470 void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen) FAST_FUNC;
471 ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to,
472 socklen_t tolen) FAST_FUNC;
473 /* SO_REUSEADDR allows a server to rebind to an address that is already
474 * "in use" by old connections to e.g. previous server instance which is
475 * killed or crashed. Without it bind will fail until all such connections
476 * time out. Linux does not allow multiple live binds on same ip:port
477 * regardless of SO_REUSEADDR (unlike some other flavors of Unix).
478 * Turn it on before you call bind(). */
479 void setsockopt_reuseaddr(int fd) FAST_FUNC; /* On Linux this never fails. */
480 int setsockopt_broadcast(int fd) FAST_FUNC;
481 int setsockopt_bindtodevice(int fd, const char *iface) FAST_FUNC;
482 /* NB: returns port in host byte order */
483 unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port) FAST_FUNC;
484 typedef struct len_and_sockaddr {
488 struct sockaddr_in sin;
489 #if ENABLE_FEATURE_IPV6
490 struct sockaddr_in6 sin6;
495 LSA_LEN_SIZE = offsetof(len_and_sockaddr, u),
496 LSA_SIZEOF_SA = sizeof(
499 struct sockaddr_in sin;
500 #if ENABLE_FEATURE_IPV6
501 struct sockaddr_in6 sin6;
506 /* Create stream socket, and allocate suitable lsa.
507 * (lsa of correct size and lsa->sa.sa_family (AF_INET/AF_INET6))
508 * af == AF_UNSPEC will result in trying to create IPv6 socket,
509 * and if kernel doesn't support it, fall back to IPv4.
510 * This is useful if you plan to bind to resulting local lsa.
512 #if ENABLE_FEATURE_IPV6
513 int xsocket_type(len_and_sockaddr **lsap, int af, int sock_type) FAST_FUNC;
515 int xsocket_type(len_and_sockaddr **lsap, int sock_type) FAST_FUNC;
516 #define xsocket_type(lsap, af, sock_type) xsocket_type((lsap), (sock_type))
518 int xsocket_stream(len_and_sockaddr **lsap) FAST_FUNC;
519 /* Create server socket bound to bindaddr:port. bindaddr can be NULL,
520 * numeric IP ("N.N.N.N") or numeric IPv6 address,
521 * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
522 * Only if there is no suffix, port argument is used */
523 /* NB: these set SO_REUSEADDR before bind */
524 int create_and_bind_stream_or_die(const char *bindaddr, int port) FAST_FUNC;
525 int create_and_bind_dgram_or_die(const char *bindaddr, int port) FAST_FUNC;
526 /* Create client TCP socket connected to peer:port. Peer cannot be NULL.
527 * Peer can be numeric IP ("N.N.N.N"), numeric IPv6 address or hostname,
528 * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
529 * If there is no suffix, port argument is used */
530 int create_and_connect_stream_or_die(const char *peer, int port) FAST_FUNC;
531 /* Connect to peer identified by lsa */
532 int xconnect_stream(const len_and_sockaddr *lsa) FAST_FUNC;
533 /* Get local address of bound or accepted socket */
534 len_and_sockaddr *get_sock_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
535 /* Get remote address of connected or accepted socket */
536 len_and_sockaddr *get_peer_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
537 /* Return malloc'ed len_and_sockaddr with socket address of host:port
538 * Currently will return IPv4 or IPv6 sockaddrs only
539 * (depending on host), but in theory nothing prevents e.g.
540 * UNIX socket address being returned, IPX sockaddr etc...
541 * On error does bb_error_msg and returns NULL */
542 len_and_sockaddr* host2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
543 /* Version which dies on error */
544 len_and_sockaddr* xhost2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
545 len_and_sockaddr* xdotted2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
546 /* Same, useful if you want to force family (e.g. IPv6) */
547 #if !ENABLE_FEATURE_IPV6
548 #define host_and_af2sockaddr(host, port, af) host2sockaddr((host), (port))
549 #define xhost_and_af2sockaddr(host, port, af) xhost2sockaddr((host), (port))
551 len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
552 len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
554 /* Assign sin[6]_port member if the socket is an AF_INET[6] one,
555 * otherwise no-op. Useful for ftp.
556 * NB: does NOT do htons() internally, just direct assignment. */
557 void set_nport(len_and_sockaddr *lsa, unsigned port) FAST_FUNC;
558 /* Retrieve sin[6]_port or return -1 for non-INET[6] lsa's */
559 int get_nport(const struct sockaddr *sa) FAST_FUNC;
560 /* Reverse DNS. Returns NULL on failure. */
561 char* xmalloc_sockaddr2host(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
562 /* This one doesn't append :PORTNUM */
563 char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
564 /* This one also doesn't fall back to dotted IP (returns NULL) */
565 char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
566 /* inet_[ap]ton on steroids */
567 char* xmalloc_sockaddr2dotted(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
568 char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
569 // "old" (ipv4 only) API
570 // users: traceroute.c hostname.c - use _list_ of all IPs
571 struct hostent *xgethostbyname(const char *name) FAST_FUNC;
572 // Also mount.c and inetd.c are using gethostbyname(),
573 // + inet_common.c has additional IPv4-only stuff
576 void socket_want_pktinfo(int fd) FAST_FUNC;
577 ssize_t send_to_from(int fd, void *buf, size_t len, int flags,
578 const struct sockaddr *to,
579 const struct sockaddr *from,
580 socklen_t tolen) FAST_FUNC;
581 ssize_t recv_from_to(int fd, void *buf, size_t len, int flags,
582 struct sockaddr *from,
584 socklen_t sa_size) FAST_FUNC;
587 char *xstrdup(const char *s) FAST_FUNC RETURNS_MALLOC;
588 char *xstrndup(const char *s, int n) FAST_FUNC RETURNS_MALLOC;
589 void overlapping_strcpy(char *dst, const char *src) FAST_FUNC;
590 char *safe_strncpy(char *dst, const char *src, size_t size) FAST_FUNC;
591 char *strncpy_IFNAMSIZ(char *dst, const char *src) FAST_FUNC;
592 /* Guaranteed to NOT be a macro (smallest code). Saves nearly 2k on uclibc.
593 * But potentially slow, don't use in one-billion-times loops */
594 int bb_putchar(int ch) FAST_FUNC;
595 char *xasprintf(const char *format, ...) __attribute__ ((format(printf, 1, 2))) FAST_FUNC RETURNS_MALLOC;
596 // gcc-4.1.1 still isn't good enough at optimizing it
597 // (+200 bytes compared to macro)
598 //static ALWAYS_INLINE
599 //int LONE_DASH(const char *s) { return s[0] == '-' && !s[1]; }
600 //static ALWAYS_INLINE
601 //int NOT_LONE_DASH(const char *s) { return s[0] != '-' || s[1]; }
602 #define LONE_DASH(s) ((s)[0] == '-' && !(s)[1])
603 #define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1])
604 #define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1])
605 #define NOT_LONE_CHAR(s,c) ((s)[0] != (c) || (s)[1])
606 #define DOT_OR_DOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2])))
608 typedef struct uni_stat_t {
610 unsigned unicode_count;
611 unsigned unicode_width;
613 /* Returns a string with unprintable chars replaced by '?' or
614 * SUBST_WCHAR. This function is unicode-aware. */
615 const char* FAST_FUNC printable_string(uni_stat_t *stats, const char *str);
616 /* Prints unprintable char ch as ^C or M-c to file
617 * (M-c is used only if ch is ORed with PRINTABLE_META),
618 * else it is printed as-is (except for ch = 0x9b) */
619 enum { PRINTABLE_META = 0x100 };
620 void fputc_printable(int ch, FILE *file) FAST_FUNC;
622 /* dmalloc will redefine these to it's own implementation. It is safe
623 * to have the prototypes here unconditionally. */
624 void *malloc_or_warn(size_t size) FAST_FUNC RETURNS_MALLOC;
625 void *xmalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
626 void *xzalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
627 void *xrealloc(void *old, size_t size) FAST_FUNC;
628 /* After xrealloc_vector(v, 4, idx) it's ok to use
629 * at least v[idx] and v[idx+1], for all idx values.
630 * shift specifies how many new elements are added (1: 2, 2: 4... 8: 256...)
631 * when all elements are used up. New elements are zeroed out. */
632 #define xrealloc_vector(vector, shift, idx) \
633 xrealloc_vector_helper((vector), (sizeof((vector)[0]) << 8) + (shift), (idx))
634 void* xrealloc_vector_helper(void *vector, unsigned sizeof_and_shift, int idx) FAST_FUNC;
637 extern ssize_t safe_read(int fd, void *buf, size_t count) FAST_FUNC;
638 extern ssize_t nonblock_safe_read(int fd, void *buf, size_t count) FAST_FUNC;
639 // NB: will return short read on error, not -1,
640 // if some data was read before error occurred
641 extern ssize_t full_read(int fd, void *buf, size_t count) FAST_FUNC;
642 extern void xread(int fd, void *buf, size_t count) FAST_FUNC;
643 extern unsigned char xread_char(int fd) FAST_FUNC;
644 extern ssize_t read_close(int fd, void *buf, size_t maxsz) FAST_FUNC;
645 extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz) FAST_FUNC;
646 // Reads one line a-la fgets (but doesn't save terminating '\n').
647 // Reads byte-by-byte. Useful when it is important to not read ahead.
648 // Bytes are appended to pfx (which must be malloced, or NULL).
649 extern char *xmalloc_reads(int fd, char *pfx, size_t *maxsz_p) FAST_FUNC;
650 /* Reads block up to *maxsz_p (default: INT_MAX - 4095) */
651 extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
652 /* Returns NULL if file can't be opened (default max size: INT_MAX - 4095) */
653 extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
654 /* Autodetects .gz etc */
655 extern int open_zipped(const char *fname) FAST_FUNC;
656 extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
657 /* Never returns NULL */
658 extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
660 extern ssize_t safe_write(int fd, const void *buf, size_t count) FAST_FUNC;
661 // NB: will return short write on error, not -1,
662 // if some data was written before error occurred
663 extern ssize_t full_write(int fd, const void *buf, size_t count) FAST_FUNC;
664 extern void xwrite(int fd, const void *buf, size_t count) FAST_FUNC;
665 extern void xwrite_str(int fd, const char *str) FAST_FUNC;
666 extern void xopen_xwrite_close(const char* file, const char *str) FAST_FUNC;
668 /* Close fd, but check for failures (some types of write errors) */
669 extern void xclose(int fd) FAST_FUNC;
671 /* Reads and prints to stdout till eof, then closes FILE. Exits on error: */
672 extern void xprint_and_close_file(FILE *file) FAST_FUNC;
674 extern char *bb_get_chunk_from_file(FILE *file, int *end) FAST_FUNC;
675 extern char *bb_get_chunk_with_continuation(FILE *file, int *end, int *lineno) FAST_FUNC;
676 /* Reads up to (and including) TERMINATING_STRING: */
677 extern char *xmalloc_fgets_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
678 /* Same, with limited max size, and returns the length (excluding NUL): */
679 extern char *xmalloc_fgets_str_len(FILE *file, const char *terminating_string, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
680 /* Chops off TERMINATING_STRING from the end: */
681 extern char *xmalloc_fgetline_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
682 /* Reads up to (and including) "\n" or NUL byte: */
683 extern char *xmalloc_fgets(FILE *file) FAST_FUNC RETURNS_MALLOC;
684 /* Chops off '\n' from the end, unlike fgets: */
685 extern char *xmalloc_fgetline(FILE *file) FAST_FUNC RETURNS_MALLOC;
686 /* Same, but doesn't try to conserve space (may have some slack after the end) */
687 /* extern char *xmalloc_fgetline_fast(FILE *file) FAST_FUNC RETURNS_MALLOC; */
689 void die_if_ferror(FILE *file, const char *msg) FAST_FUNC;
690 void die_if_ferror_stdout(void) FAST_FUNC;
691 int fflush_all(void) FAST_FUNC;
692 void fflush_stdout_and_exit(int retval) NORETURN FAST_FUNC;
693 int fclose_if_not_stdin(FILE *file) FAST_FUNC;
694 FILE* xfopen(const char *filename, const char *mode) FAST_FUNC;
695 /* Prints warning to stderr and returns NULL on failure: */
696 FILE* fopen_or_warn(const char *filename, const char *mode) FAST_FUNC;
697 /* "Opens" stdin if filename is special, else just opens file: */
698 FILE* xfopen_stdin(const char *filename) FAST_FUNC;
699 FILE* fopen_or_warn_stdin(const char *filename) FAST_FUNC;
700 FILE* fopen_for_read(const char *path) FAST_FUNC;
701 FILE* xfopen_for_read(const char *path) FAST_FUNC;
702 FILE* fopen_for_write(const char *path) FAST_FUNC;
703 FILE* xfopen_for_write(const char *path) FAST_FUNC;
704 FILE* xfdopen_for_read(int fd) FAST_FUNC;
705 FILE* xfdopen_for_write(int fd) FAST_FUNC;
707 int bb_pstrcmp(const void *a, const void *b) /* not FAST_FUNC! */;
708 void qsort_string_vector(char **sv, unsigned count) FAST_FUNC;
710 /* Wrapper which restarts poll on EINTR or ENOMEM.
711 * On other errors complains [perror("poll")] and returns.
712 * Warning! May take (much) longer than timeout_ms to return!
713 * If this is a problem, use bare poll and open-code EINTR/ENOMEM handling */
714 int safe_poll(struct pollfd *ufds, nfds_t nfds, int timeout_ms) FAST_FUNC;
716 char *safe_gethostname(void) FAST_FUNC;
717 char *safe_getdomainname(void) FAST_FUNC;
719 /* Convert each alpha char in str to lower-case */
720 char* str_tolower(char *str) FAST_FUNC;
722 char *utoa(unsigned n) FAST_FUNC;
723 char *itoa(int n) FAST_FUNC;
724 /* Returns a pointer past the formatted number, does NOT null-terminate */
725 char *utoa_to_buf(unsigned n, char *buf, unsigned buflen) FAST_FUNC;
726 char *itoa_to_buf(int n, char *buf, unsigned buflen) FAST_FUNC;
727 /* Intelligent formatters of bignums */
728 void smart_ulltoa4(unsigned long long ul, char buf[5], const char *scale) FAST_FUNC;
729 void smart_ulltoa5(unsigned long long ul, char buf[5], const char *scale) FAST_FUNC;
730 /* If block_size == 0, display size without fractional part,
731 * else display (size * block_size) with one decimal digit.
732 * If display_unit == 0, show value no bigger than 1024 with suffix (K,M,G...),
733 * else divide by display_unit and do not use suffix. */
734 #define HUMAN_READABLE_MAX_WIDTH 7 /* "1024.0G" */
735 #define HUMAN_READABLE_MAX_WIDTH_STR "7"
736 //TODO: provide pointer to buf (avoid statics)?
737 const char *make_human_readable_str(unsigned long long size,
738 unsigned long block_size, unsigned long display_unit) FAST_FUNC;
739 /* Put a string of hex bytes ("1b2e66fe"...), return advanced pointer */
740 char *bin2hex(char *buf, const char *cp, int count) FAST_FUNC;
742 char* hex2bin(char *dst, const char *str, int count) FAST_FUNC;
744 /* Generate a UUID */
745 void generate_uuid(uint8_t *buf) FAST_FUNC;
747 /* Last element is marked by mult == 0 */
754 /* Using xatoi() instead of naive atoi() is not always convenient -
755 * in many places people want *non-negative* values, but store them
756 * in signed int. Therefore we need this one:
757 * dies if input is not in [0, INT_MAX] range. Also will reject '-0' etc */
758 int xatoi_u(const char *numstr) FAST_FUNC;
759 /* Useful for reading port numbers */
760 uint16_t xatou16(const char *numstr) FAST_FUNC;
763 /* These parse entries in /etc/passwd and /etc/group. This is desirable
764 * for BusyBox since we want to avoid using the glibc NSS stuff, which
765 * increases target size and is often not needed on embedded systems. */
766 long xuname2uid(const char *name) FAST_FUNC;
767 long xgroup2gid(const char *name) FAST_FUNC;
768 /* wrapper: allows string to contain numeric uid or gid */
769 unsigned long get_ug_id(const char *s, long FAST_FUNC (*xname2id)(const char *)) FAST_FUNC;
770 /* from chpst. Does not die, returns 0 on failure */
775 /* always sets uid and gid */
776 int get_uidgid(struct bb_uidgid_t*, const char*, int numeric_ok) FAST_FUNC;
777 /* always sets uid and gid, allows numeric; exits on failure */
778 void xget_uidgid(struct bb_uidgid_t*, const char*) FAST_FUNC;
779 /* chown-like handling of "user[:[group]" */
780 void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group) FAST_FUNC;
781 struct passwd* xgetpwnam(const char *name) FAST_FUNC;
782 struct group* xgetgrnam(const char *name) FAST_FUNC;
783 struct passwd* xgetpwuid(uid_t uid) FAST_FUNC;
784 struct group* xgetgrgid(gid_t gid) FAST_FUNC;
785 char* xuid2uname(uid_t uid) FAST_FUNC;
786 char* xgid2group(gid_t gid) FAST_FUNC;
787 char* uid2uname(uid_t uid) FAST_FUNC;
788 char* gid2group(gid_t gid) FAST_FUNC;
789 char* uid2uname_utoa(long uid) FAST_FUNC;
790 char* gid2group_utoa(long gid) FAST_FUNC;
791 /* versions which cache results (useful for ps, ls etc) */
792 const char* get_cached_username(uid_t uid) FAST_FUNC;
793 const char* get_cached_groupname(gid_t gid) FAST_FUNC;
794 void clear_username_cache(void) FAST_FUNC;
795 /* internally usernames are saved in fixed-sized char[] buffers */
796 enum { USERNAME_MAX_SIZE = 16 - sizeof(int) };
797 #if ENABLE_FEATURE_CHECK_NAMES
798 void die_if_bad_username(const char* name) FAST_FUNC;
800 #define die_if_bad_username(name) ((void)(name))
803 #if ENABLE_FEATURE_UTMP
804 void FAST_FUNC write_new_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
805 void FAST_FUNC update_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
807 # define write_new_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
808 # define update_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
811 int execable_file(const char *name) FAST_FUNC;
812 char *find_execable(const char *filename, char **PATHp) FAST_FUNC;
813 int exists_execable(const char *filename) FAST_FUNC;
815 /* BB_EXECxx always execs (it's not doing NOFORK/NOEXEC stuff),
816 * but it may exec busybox and call applet instead of searching PATH.
818 #if ENABLE_FEATURE_PREFER_APPLETS
819 int bb_execvp(const char *file, char *const argv[]) FAST_FUNC;
820 #define BB_EXECVP(prog,cmd) bb_execvp(prog,cmd)
821 #define BB_EXECLP(prog,cmd,...) \
822 execlp((find_applet_by_name(prog) >= 0) ? CONFIG_BUSYBOX_EXEC_PATH : prog, \
825 #define BB_EXECVP(prog,cmd) execvp(prog,cmd)
826 #define BB_EXECLP(prog,cmd,...) execlp(prog,cmd, __VA_ARGS__)
829 /* NOMMU friendy fork+exec: */
830 pid_t spawn(char **argv) FAST_FUNC;
831 pid_t xspawn(char **argv) FAST_FUNC;
833 pid_t safe_waitpid(pid_t pid, int *wstat, int options) FAST_FUNC;
834 pid_t wait_any_nohang(int *wstat) FAST_FUNC;
835 /* wait4pid: unlike waitpid, waits ONLY for one process.
836 * Returns sig + 0x180 if child is killed by signal.
837 * It's safe to pass negative 'pids' from failed [v]fork -
838 * wait4pid will return -1 (and will not clobber [v]fork's errno).
839 * IOW: rc = wait4pid(spawn(argv));
840 * if (rc < 0) bb_perror_msg("%s", argv[0]);
841 * if (rc > 0) bb_error_msg("exit code: %d", rc & 0xff);
843 int wait4pid(pid_t pid) FAST_FUNC;
844 /* Same as wait4pid(spawn(argv)), but with NOFORK/NOEXEC if configured: */
845 int spawn_and_wait(char **argv) FAST_FUNC;
846 struct nofork_save_area {
848 const char *applet_name;
849 int xfunc_error_retval;
850 uint32_t option_mask32;
854 void save_nofork_data(struct nofork_save_area *save) FAST_FUNC;
855 void restore_nofork_data(struct nofork_save_area *save) FAST_FUNC;
856 /* Does NOT check that applet is NOFORK, just blindly runs it */
857 int run_nofork_applet(int applet_no, char **argv) FAST_FUNC;
858 int run_nofork_applet_prime(struct nofork_save_area *old, int applet_no, char **argv) FAST_FUNC;
860 /* Helpers for daemonization.
862 * bb_daemonize(flags) = daemonize, does not compile on NOMMU
864 * bb_daemonize_or_rexec(flags, argv) = daemonizes on MMU (and ignores argv),
865 * rexec's itself on NOMMU with argv passed as command line.
866 * Thus bb_daemonize_or_rexec may cause your <applet>_main() to be re-executed
867 * from the start. (It will detect it and not reexec again second time).
868 * You have to audit carefully that you don't do something twice as a result
869 * (opening files/sockets, parsing config files etc...)!
871 * Both of the above will redirect fd 0,1,2 to /dev/null and drop ctty
872 * (will do setsid()).
874 * fork_or_rexec(argv) = bare-bones "fork" on MMU,
875 * "vfork + re-exec ourself" on NOMMU. No fd redirection, no setsid().
876 * On MMU ignores argv.
878 * Helper for network daemons in foreground mode:
880 * bb_sanitize_stdio() = make sure that fd 0,1,2 are opened by opening them
881 * to /dev/null if they are not.
884 DAEMON_CHDIR_ROOT = 1,
885 DAEMON_DEVNULL_STDIO = 2,
886 DAEMON_CLOSE_EXTRA_FDS = 4,
887 DAEMON_ONLY_SANITIZE = 8, /* internal use */
890 pid_t fork_or_rexec(void) FAST_FUNC;
891 enum { re_execed = 0 };
892 # define fork_or_rexec(argv) fork_or_rexec()
893 # define bb_daemonize_or_rexec(flags, argv) bb_daemonize_or_rexec(flags)
894 # define bb_daemonize(flags) bb_daemonize_or_rexec(flags, bogus)
896 void re_exec(char **argv) NORETURN FAST_FUNC;
897 pid_t fork_or_rexec(char **argv) FAST_FUNC;
898 extern bool re_execed;
899 int BUG_fork_is_unavailable_on_nommu(void) FAST_FUNC;
900 int BUG_daemon_is_unavailable_on_nommu(void) FAST_FUNC;
901 void BUG_bb_daemonize_is_unavailable_on_nommu(void) FAST_FUNC;
902 # define fork() BUG_fork_is_unavailable_on_nommu()
903 # define daemon(a,b) BUG_daemon_is_unavailable_on_nommu()
904 # define bb_daemonize(a) BUG_bb_daemonize_is_unavailable_on_nommu()
906 void bb_daemonize_or_rexec(int flags, char **argv) FAST_FUNC;
907 void bb_sanitize_stdio(void) FAST_FUNC;
908 /* Clear dangerous stuff, set PATH. Return 1 if was run by different user. */
909 int sanitize_env_if_suid(void) FAST_FUNC;
912 char* single_argv(char **argv) FAST_FUNC;
913 extern const char *const bb_argv_dash[]; /* "-", NULL */
914 extern const char *opt_complementary;
915 #if ENABLE_LONG_OPTS || ENABLE_FEATURE_GETOPT_LONG
916 #define No_argument "\0"
917 #define Required_argument "\001"
918 #define Optional_argument "\002"
919 extern const char *applet_long_options;
921 extern uint32_t option_mask32;
922 extern uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC;
925 typedef struct llist_t {
927 struct llist_t *link;
929 void llist_add_to(llist_t **old_head, void *data) FAST_FUNC;
930 void llist_add_to_end(llist_t **list_head, void *data) FAST_FUNC;
931 void *llist_pop(llist_t **elm) FAST_FUNC;
932 void llist_unlink(llist_t **head, llist_t *elm) FAST_FUNC;
933 void llist_free(llist_t *elm, void (*freeit)(void *data)) FAST_FUNC;
934 llist_t *llist_rev(llist_t *list) FAST_FUNC;
935 llist_t *llist_find_str(llist_t *first, const char *str) FAST_FUNC;
936 /* BTW, surprisingly, changing API to
937 * llist_t *llist_add_to(llist_t *old_head, void *data)
938 * etc does not result in smaller code... */
940 /* start_stop_daemon and udhcpc are special - they want
941 * to create pidfiles regardless of FEATURE_PIDFILE */
942 #if ENABLE_FEATURE_PIDFILE || defined(WANT_PIDFILE)
943 /* True only if we created pidfile which is *file*, not /dev/null etc */
944 extern smallint wrote_pidfile;
945 void write_pidfile(const char *path) FAST_FUNC;
946 #define remove_pidfile(path) do { if (wrote_pidfile) unlink(path); } while (0)
948 enum { wrote_pidfile = 0 };
949 #define write_pidfile(path) ((void)0)
950 #define remove_pidfile(path) ((void)0)
955 LOGMODE_STDIO = (1 << 0),
956 LOGMODE_SYSLOG = (1 << 1) * ENABLE_FEATURE_SYSLOG,
957 LOGMODE_BOTH = LOGMODE_SYSLOG + LOGMODE_STDIO,
959 extern const char *msg_eol;
960 extern smallint logmode;
961 extern int die_sleep;
962 extern int xfunc_error_retval;
963 extern jmp_buf die_jmp;
964 extern void xfunc_die(void) NORETURN FAST_FUNC;
965 extern void bb_show_usage(void) NORETURN FAST_FUNC;
966 extern void bb_error_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
967 extern void bb_error_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
968 extern void bb_perror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
969 extern void bb_simple_perror_msg(const char *s) FAST_FUNC;
970 extern void bb_perror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
971 extern void bb_simple_perror_msg_and_die(const char *s) NORETURN FAST_FUNC;
972 extern void bb_herror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
973 extern void bb_herror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
974 extern void bb_perror_nomsg_and_die(void) NORETURN FAST_FUNC;
975 extern void bb_perror_nomsg(void) FAST_FUNC;
976 extern void bb_info_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
977 extern void bb_verror_msg(const char *s, va_list p, const char *strerr) FAST_FUNC;
979 /* We need to export XXX_main from libbusybox
980 * only if we build "individual" binaries
982 #if ENABLE_FEATURE_INDIVIDUAL
983 #define MAIN_EXTERNALLY_VISIBLE EXTERNALLY_VISIBLE
985 #define MAIN_EXTERNALLY_VISIBLE
989 /* Applets which are useful from another applets */
990 int bb_cat(char** argv);
991 /* If shell needs them, they exist even if not enabled as applets */
992 int echo_main(int argc, char** argv) IF_ECHO(MAIN_EXTERNALLY_VISIBLE);
993 int printf_main(int argc, char **argv) IF_PRINTF(MAIN_EXTERNALLY_VISIBLE);
994 int test_main(int argc, char **argv) IF_TEST(MAIN_EXTERNALLY_VISIBLE);
995 int kill_main(int argc, char **argv) IF_KILL(MAIN_EXTERNALLY_VISIBLE);
996 /* Similar, but used by chgrp, not shell */
997 int chown_main(int argc, char **argv) IF_CHOWN(MAIN_EXTERNALLY_VISIBLE);
999 int ls_main(int argc, char **argv) IF_LS(MAIN_EXTERNALLY_VISIBLE);
1000 /* Don't need IF_xxx() guard for these */
1001 int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1002 int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1005 void bb_displayroutes(int noresolve, int netstatfmt) FAST_FUNC;
1010 int create_icmp_socket(void) FAST_FUNC;
1011 int create_icmp6_socket(void) FAST_FUNC;
1013 /* This structure defines protocol families and their handlers. */
1019 char* FAST_FUNC (*print)(unsigned char *);
1020 const char* FAST_FUNC (*sprint)(struct sockaddr *, int numeric);
1021 int FAST_FUNC (*input)(/*int type,*/ const char *bufp, struct sockaddr *);
1022 void FAST_FUNC (*herror)(char *text);
1023 int FAST_FUNC (*rprint)(int options);
1024 int FAST_FUNC (*rinput)(int typ, int ext, char **argv);
1025 /* may modify src */
1026 int FAST_FUNC (*getmask)(char *src, struct sockaddr *mask, char *name);
1028 /* This structure defines hardware protocols and their handlers. */
1034 char* FAST_FUNC (*print)(unsigned char *);
1035 int FAST_FUNC (*input)(const char *, struct sockaddr *);
1036 int FAST_FUNC (*activate)(int fd);
1037 int suppress_null_addr;
1039 extern smallint interface_opt_a;
1040 int display_interfaces(char *ifname) FAST_FUNC;
1041 #if ENABLE_FEATURE_HWIB
1042 int in_ib(const char *bufp, struct sockaddr *sap) FAST_FUNC;
1044 #define in_ib(a, b) 1 /* fail */
1046 const struct aftype *get_aftype(const char *name) FAST_FUNC;
1047 const struct hwtype *get_hwtype(const char *name) FAST_FUNC;
1048 const struct hwtype *get_hwntype(int type) FAST_FUNC;
1051 #ifndef BUILD_INDIVIDUAL
1052 extern int find_applet_by_name(const char *name) FAST_FUNC;
1053 /* Returns only if applet is not found. */
1054 extern void run_applet_and_exit(const char *name, char **argv) FAST_FUNC;
1055 extern void run_applet_no_and_exit(int a, char **argv) NORETURN FAST_FUNC;
1058 #ifdef HAVE_MNTENT_H
1059 extern int match_fstype(const struct mntent *mt, const char *fstypes) FAST_FUNC;
1060 extern struct mntent *find_mount_point(const char *name, int subdir_too) FAST_FUNC;
1062 extern void erase_mtab(const char * name) FAST_FUNC;
1063 extern unsigned int tty_baud_to_value(speed_t speed) FAST_FUNC;
1064 extern speed_t tty_value_to_baud(unsigned int value) FAST_FUNC;
1066 extern void bb_warn_ignoring_args(char *arg) FAST_FUNC;
1068 # define bb_warn_ignoring_args(arg) ((void)0)
1071 extern int get_linux_version_code(void) FAST_FUNC;
1073 extern char *query_loop(const char *device) FAST_FUNC;
1074 extern int del_loop(const char *device) FAST_FUNC;
1075 /* If *devname is not NULL, use that name, otherwise try to find free one,
1076 * malloc and return it in *devname.
1077 * return value: 1: read-only loopdev was setup, 0: rw, < 0: error */
1078 extern int set_loop(char **devname, const char *file, unsigned long long offset) FAST_FUNC;
1080 /* Like bb_ask below, but asks on stdin with no timeout. */
1081 char *bb_ask_stdin(const char * prompt) FAST_FUNC;
1082 //TODO: pass buf pointer or return allocated buf (avoid statics)?
1083 char *bb_ask(const int fd, int timeout, const char * prompt) FAST_FUNC;
1084 int bb_ask_confirmation(void) FAST_FUNC;
1086 int bb_parse_mode(const char* s, mode_t* theMode) FAST_FUNC;
1089 * Config file parser
1092 PARSE_COLLAPSE = 0x00010000, // treat consecutive delimiters as one
1093 PARSE_TRIM = 0x00020000, // trim leading and trailing delimiters
1094 // TODO: COLLAPSE and TRIM seem to always go in pair
1095 PARSE_GREEDY = 0x00040000, // last token takes entire remainder of the line
1096 PARSE_MIN_DIE = 0x00100000, // die if < min tokens found
1097 // keep a copy of current line
1098 PARSE_KEEP_COPY = 0x00200000 * ENABLE_FEATURE_CROND_D,
1099 // PARSE_ESCAPE = 0x00400000, // process escape sequences in tokens
1101 // * remove leading and trailing delimiters and collapse
1102 // multiple delimiters into one
1103 // * warn and continue if less than mintokens delimiters found
1104 // * grab everything into last token
1105 PARSE_NORMAL = PARSE_COLLAPSE | PARSE_TRIM | PARSE_GREEDY,
1107 typedef struct parser_t {
1113 parser_t* config_open(const char *filename) FAST_FUNC;
1114 parser_t* config_open2(const char *filename, FILE* FAST_FUNC (*fopen_func)(const char *path)) FAST_FUNC;
1115 int config_read(parser_t *parser, char **tokens, unsigned flags, const char *delims) FAST_FUNC;
1116 #define config_read(parser, tokens, max, min, str, flags) \
1117 config_read(parser, tokens, ((flags) | (((min) & 0xFF) << 8) | ((max) & 0xFF)), str)
1118 void config_close(parser_t *parser) FAST_FUNC;
1120 /* Concatenate path and filename to new allocated buffer.
1121 * Add "/" only as needed (no duplicate "//" are produced).
1122 * If path is NULL, it is assumed to be "/".
1123 * filename should not be NULL. */
1124 char *concat_path_file(const char *path, const char *filename) FAST_FUNC;
1125 char *concat_subpath_file(const char *path, const char *filename) FAST_FUNC;
1126 const char *bb_basename(const char *name) FAST_FUNC;
1127 /* NB: can violate const-ness (similarly to strchr) */
1128 char *last_char_is(const char *s, int c) FAST_FUNC;
1131 int bb_make_directory(char *path, long mode, int flags) FAST_FUNC;
1133 int get_signum(const char *name) FAST_FUNC;
1134 const char *get_signame(int number) FAST_FUNC;
1135 void print_signames(void) FAST_FUNC;
1137 char *bb_simplify_path(const char *path) FAST_FUNC;
1138 /* Returns ptr to NUL */
1139 char *bb_simplify_abs_path_inplace(char *path) FAST_FUNC;
1141 #define FAIL_DELAY 3
1142 extern void bb_do_delay(int seconds) FAST_FUNC;
1143 extern void change_identity(const struct passwd *pw) FAST_FUNC;
1144 extern void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) NORETURN FAST_FUNC;
1145 extern void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) FAST_FUNC;
1147 extern void renew_current_security_context(void) FAST_FUNC;
1148 extern void set_current_security_context(security_context_t sid) FAST_FUNC;
1149 extern context_t set_security_context_component(security_context_t cur_context,
1150 char *user, char *role, char *type, char *range) FAST_FUNC;
1151 extern void setfscreatecon_or_die(security_context_t scontext) FAST_FUNC;
1152 extern void selinux_preserve_fcontext(int fdesc) FAST_FUNC;
1154 #define selinux_preserve_fcontext(fdesc) ((void)0)
1156 extern void selinux_or_die(void) FAST_FUNC;
1158 /* setup_environment:
1159 * if chdir pw->pw_dir: ok: else if to_tmp == 1: goto /tmp else: goto / or die
1160 * if clear_env = 1: cd(pw->pw_dir), clear environment, then set
1162 * USER=pw->pw_name, LOGNAME=pw->pw_name
1163 * PATH=bb_default_[root_]path
1166 * else if change_env = 1:
1167 * if not root (if pw->pw_uid != 0):
1168 * USER=pw->pw_name, LOGNAME=pw->pw_name
1173 #define SETUP_ENV_CHANGEENV (1 << 0)
1174 #define SETUP_ENV_CLEARENV (1 << 1)
1175 #define SETUP_ENV_TO_TMP (1 << 2)
1176 extern void setup_environment(const char *shell, int flags, const struct passwd *pw) FAST_FUNC;
1177 extern int correct_password(const struct passwd *pw) FAST_FUNC;
1178 /* Returns a malloced string */
1179 #if !ENABLE_USE_BB_CRYPT
1180 #define pw_encrypt(clear, salt, cleanup) pw_encrypt(clear, salt)
1182 extern char *pw_encrypt(const char *clear, const char *salt, int cleanup) FAST_FUNC;
1183 extern int obscure(const char *old, const char *newval, const struct passwd *pwdp) FAST_FUNC;
1184 /* rnd is additional random input. New one is returned.
1185 * Useful if you call crypt_make_salt many times in a row:
1186 * rnd = crypt_make_salt(buf1, 4, 0);
1187 * rnd = crypt_make_salt(buf2, 4, rnd);
1188 * rnd = crypt_make_salt(buf3, 4, rnd);
1189 * (otherwise we risk having same salt generated)
1191 extern int crypt_make_salt(char *p, int cnt, int rnd) FAST_FUNC;
1193 /* Returns number of lines changed, or -1 on error */
1194 #if !(ENABLE_FEATURE_ADDUSER_TO_GROUP || ENABLE_FEATURE_DEL_USER_FROM_GROUP)
1195 #define update_passwd(filename, username, data, member) \
1196 update_passwd(filename, username, data)
1198 extern int update_passwd(const char *filename,
1199 const char *username,
1201 const char *member) FAST_FUNC;
1203 int index_in_str_array(const char *const string_array[], const char *key) FAST_FUNC;
1204 int index_in_strings(const char *strings, const char *key) FAST_FUNC;
1205 int index_in_substr_array(const char *const string_array[], const char *key) FAST_FUNC;
1206 int index_in_substrings(const char *strings, const char *key) FAST_FUNC;
1207 const char *nth_string(const char *strings, int n) FAST_FUNC;
1209 extern void print_login_issue(const char *issue_file, const char *tty) FAST_FUNC;
1210 extern void print_login_prompt(void) FAST_FUNC;
1212 char *xmalloc_ttyname(int fd) FAST_FUNC RETURNS_MALLOC;
1213 /* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */
1214 int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FUNC;
1216 int tcsetattr_stdin_TCSANOW(const struct termios *tp) FAST_FUNC;
1218 /* NB: "unsigned request" is crucial! "int request" will break some arches! */
1219 int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
1220 int ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
1221 #if ENABLE_IOCTL_HEX2STR_ERROR
1222 int bb_ioctl_or_warn(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
1223 int bb_xioctl(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
1224 #define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp,#request)
1225 #define xioctl(fd,request,argp) bb_xioctl(fd,request,argp,#request)
1227 int bb_ioctl_or_warn(int fd, unsigned request, void *argp) FAST_FUNC;
1228 int bb_xioctl(int fd, unsigned request, void *argp) FAST_FUNC;
1229 #define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp)
1230 #define xioctl(fd,request,argp) bb_xioctl(fd,request,argp)
1233 char *is_in_ino_dev_hashtable(const struct stat *statbuf) FAST_FUNC;
1234 void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name) FAST_FUNC;
1235 void reset_ino_dev_hashtable(void) FAST_FUNC;
1237 /* At least glibc has horrendously large inline for this, so wrap it */
1238 unsigned long long bb_makedev(unsigned int major, unsigned int minor) FAST_FUNC;
1240 #define makedev(a,b) bb_makedev(a,b)
1244 /* "Keycodes" that report an escape sequence.
1245 * We use something which fits into signed char,
1246 * yet doesn't represent any valid Unicode character.
1247 * Also, -1 is reserved for error indication and we don't use it. */
1255 KEYCODE_INSERT = -8,
1256 KEYCODE_DELETE = -9,
1257 KEYCODE_PAGEUP = -10,
1258 KEYCODE_PAGEDOWN = -11,
1260 KEYCODE_CTRL_UP = KEYCODE_UP & ~0x40,
1261 KEYCODE_CTRL_DOWN = KEYCODE_DOWN & ~0x40,
1262 KEYCODE_CTRL_RIGHT = KEYCODE_RIGHT & ~0x40,
1263 KEYCODE_CTRL_LEFT = KEYCODE_LEFT & ~0x40,
1274 KEYCODE_FUN10 = -21,
1275 KEYCODE_FUN11 = -22,
1276 KEYCODE_FUN12 = -23,
1278 KEYCODE_CURSOR_POS = -0x100, /* 0xfff..fff00 */
1279 /* How long is the longest ESC sequence we know?
1280 * We want it big enough to be able to contain
1281 * cursor position sequence "ESC [ 9999 ; 9999 R"
1283 KEYCODE_BUFFER_SIZE = 16
1285 /* Note: fd may be in blocking or non-blocking mode, both make sense.
1286 * For one, less uses non-blocking mode.
1287 * Only the first read syscall inside read_key may block indefinitely
1288 * (unless fd is in non-blocking mode),
1289 * subsequent reads will time out after a few milliseconds.
1290 * Return of -1 means EOF or error (errno == 0 on EOF).
1291 * buffer[0] is used as a counter of buffered chars and must be 0
1294 * -2: do not poll for input;
1295 * -1: poll(-1) (i.e. block);
1296 * >=0: poll for TIMEOUT milliseconds, return -1/EAGAIN on timeout
1298 int64_t read_key(int fd, char *buffer, int timeout) FAST_FUNC;
1299 void read_key_ungets(char *buffer, const char *str, unsigned len) FAST_FUNC;
1302 #if ENABLE_FEATURE_EDITING
1303 /* It's NOT just ENABLEd or disabled. It's a number: */
1304 # ifdef CONFIG_FEATURE_EDITING_HISTORY
1305 # define MAX_HISTORY (CONFIG_FEATURE_EDITING_HISTORY + 0)
1307 # define MAX_HISTORY 0
1309 typedef struct line_input_t {
1311 const char *path_lookup;
1315 # if ENABLE_FEATURE_EDITING_SAVEHISTORY
1316 unsigned cnt_history_in_file;
1317 const char *hist_file;
1319 char *history[MAX_HISTORY + 1];
1323 DO_HISTORY = 1 * (MAX_HISTORY > 0),
1324 SAVE_HISTORY = 2 * (MAX_HISTORY > 0) * ENABLE_FEATURE_EDITING_SAVEHISTORY,
1325 TAB_COMPLETION = 4 * ENABLE_FEATURE_TAB_COMPLETION,
1326 USERNAME_COMPLETION = 8 * ENABLE_FEATURE_USERNAME_COMPLETION,
1327 VI_MODE = 0x10 * ENABLE_FEATURE_EDITING_VI,
1328 WITH_PATH_LOOKUP = 0x20,
1329 FOR_SHELL = DO_HISTORY | SAVE_HISTORY | TAB_COMPLETION | USERNAME_COMPLETION,
1331 line_input_t *new_line_input_t(int flags) FAST_FUNC;
1332 /* So far static: void free_line_input_t(line_input_t *n) FAST_FUNC; */
1333 /* maxsize must be >= 2.
1335 * -1 on read errors or EOF, or on bare Ctrl-D,
1336 * 0 on ctrl-C (the line entered is still returned in 'command'),
1337 * >0 length of input string, including terminating '\n'
1339 int read_line_input(const char* prompt, char* command, int maxsize, line_input_t *state) FAST_FUNC;
1341 #define MAX_HISTORY 0
1342 int read_line_input(const char* prompt, char* command, int maxsize) FAST_FUNC;
1343 #define read_line_input(prompt, command, maxsize, state) \
1344 read_line_input(prompt, command, maxsize)
1349 # ifdef TASK_COMM_LEN
1350 enum { COMM_LEN = TASK_COMM_LEN };
1352 /* synchronize with sizeof(task_struct.comm) in /usr/include/linux/sched.h */
1353 enum { COMM_LEN = 16 };
1356 typedef struct procps_status_t {
1358 IF_FEATURE_SHOW_THREADS(DIR *task_dir;)
1359 uint8_t shift_pages_to_bytes;
1360 uint8_t shift_pages_to_kb;
1361 /* Fields are set to 0/NULL if failed to determine (or not requested) */
1365 IF_SELINUX(char *context;)
1366 /* Everything below must contain no ptrs to malloc'ed data:
1367 * it is memset(0) for each process in procps_scan() */
1368 unsigned long vsz, rss; /* we round it to kbytes */
1369 unsigned long stime, utime;
1370 unsigned long start_time;
1377 #if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
1382 unsigned tty_major,tty_minor;
1383 #if ENABLE_FEATURE_TOPMEM
1384 unsigned long mapped_rw;
1385 unsigned long mapped_ro;
1386 unsigned long shared_clean;
1387 unsigned long shared_dirty;
1388 unsigned long private_clean;
1389 unsigned long private_dirty;
1390 unsigned long stack;
1393 /* basename of executable in exec(2), read from /proc/N/stat
1394 * (if executable is symlink or script, it is NOT replaced
1395 * by link target or interpreter name) */
1396 char comm[COMM_LEN];
1397 /* user/group? - use passwd/group parsing functions */
1398 #if ENABLE_FEATURE_TOP_SMP_PROCESS
1399 int last_seen_on_cpu;
1402 /* flag bits for procps_scan(xx, flags) calls */
1404 PSSCAN_PID = 1 << 0,
1405 PSSCAN_PPID = 1 << 1,
1406 PSSCAN_PGID = 1 << 2,
1407 PSSCAN_SID = 1 << 3,
1408 PSSCAN_UIDGID = 1 << 4,
1409 PSSCAN_COMM = 1 << 5,
1410 /* PSSCAN_CMD = 1 << 6, - use read_cmdline instead */
1411 PSSCAN_ARGV0 = 1 << 7,
1412 PSSCAN_EXE = 1 << 8,
1413 PSSCAN_STATE = 1 << 9,
1414 PSSCAN_VSZ = 1 << 10,
1415 PSSCAN_RSS = 1 << 11,
1416 PSSCAN_STIME = 1 << 12,
1417 PSSCAN_UTIME = 1 << 13,
1418 PSSCAN_TTY = 1 << 14,
1419 PSSCAN_SMAPS = (1 << 15) * ENABLE_FEATURE_TOPMEM,
1420 /* NB: used by find_pid_by_name(). Any applet using it
1421 * needs to be mentioned here. */
1422 PSSCAN_ARGVN = (1 << 16) * (ENABLE_KILLALL
1423 || ENABLE_PGREP || ENABLE_PKILL
1427 PSSCAN_CONTEXT = (1 << 17) * ENABLE_SELINUX,
1428 PSSCAN_START_TIME = 1 << 18,
1429 PSSCAN_CPU = (1 << 19) * ENABLE_FEATURE_TOP_SMP_PROCESS,
1430 PSSCAN_NICE = (1 << 20) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
1431 PSSCAN_RUIDGID = (1 << 21) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
1432 PSSCAN_TASKS = (1 << 22) * ENABLE_FEATURE_SHOW_THREADS,
1433 /* These are all retrieved from proc/NN/stat in one go: */
1434 PSSCAN_STAT = PSSCAN_PPID | PSSCAN_PGID | PSSCAN_SID
1435 /**/ | PSSCAN_COMM | PSSCAN_STATE
1436 /**/ | PSSCAN_VSZ | PSSCAN_RSS
1437 /**/ | PSSCAN_STIME | PSSCAN_UTIME | PSSCAN_START_TIME
1438 /**/ | PSSCAN_TTY | PSSCAN_NICE
1441 //procps_status_t* alloc_procps_scan(void) FAST_FUNC;
1442 void free_procps_scan(procps_status_t* sp) FAST_FUNC;
1443 procps_status_t* procps_scan(procps_status_t* sp, int flags) FAST_FUNC;
1444 /* Format cmdline (up to col chars) into char buf[size] */
1445 /* Puts [comm] if cmdline is empty (-> process is a kernel thread) */
1446 void read_cmdline(char *buf, int size, unsigned pid, const char *comm) FAST_FUNC;
1447 pid_t *find_pid_by_name(const char* procName) FAST_FUNC;
1448 pid_t *pidlist_reverse(pid_t *pidList) FAST_FUNC;
1451 extern const char bb_uuenc_tbl_base64[];
1452 extern const char bb_uuenc_tbl_std[];
1453 void bb_uuencode(char *store, const void *s, int length, const char *tbl) FAST_FUNC;
1455 typedef struct sha1_ctx_t {
1456 uint32_t hash[8]; /* 5, +3 elements for sha256 */
1458 uint8_t wbuffer[64]; /* NB: always correctly aligned for uint64_t */
1459 void (*process_block)(struct sha1_ctx_t*) FAST_FUNC;
1461 void sha1_begin(sha1_ctx_t *ctx) FAST_FUNC;
1462 void sha1_hash(const void *data, size_t length, sha1_ctx_t *ctx) FAST_FUNC;
1463 void sha1_end(void *resbuf, sha1_ctx_t *ctx) FAST_FUNC;
1464 typedef struct sha1_ctx_t sha256_ctx_t;
1465 void sha256_begin(sha256_ctx_t *ctx) FAST_FUNC;
1466 #define sha256_hash sha1_hash
1467 #define sha256_end sha1_end
1468 typedef struct sha512_ctx_t {
1470 uint64_t total64[2];
1471 uint8_t wbuffer[128]; /* NB: always correctly aligned for uint64_t */
1473 void sha512_begin(sha512_ctx_t *ctx) FAST_FUNC;
1474 void sha512_hash(const void *buffer, size_t len, sha512_ctx_t *ctx) FAST_FUNC;
1475 void sha512_end(void *resbuf, sha512_ctx_t *ctx) FAST_FUNC;
1477 typedef struct md5_ctx_t {
1487 /* libbb/md5prime.c uses a bit different one: */
1488 typedef struct md5_ctx_t {
1489 uint32_t state[4]; /* state (ABCD) */
1490 uint32_t count[2]; /* number of bits, modulo 2^64 (lsb first) */
1491 unsigned char buffer[64]; /* input buffer */
1494 void md5_begin(md5_ctx_t *ctx) FAST_FUNC;
1495 void md5_hash(const void *data, size_t length, md5_ctx_t *ctx) FAST_FUNC;
1496 void md5_end(void *resbuf, md5_ctx_t *ctx) FAST_FUNC;
1499 uint32_t *crc32_filltable(uint32_t *tbl256, int endian) FAST_FUNC;
1501 typedef struct masks_labels_t {
1505 int print_flags_separated(const int *masks, const char *labels,
1506 int flags, const char *separator) FAST_FUNC;
1507 int print_flags(const masks_labels_t *ml, int flags) FAST_FUNC;
1509 typedef struct bb_progress_t {
1511 unsigned lastupdate_sec;
1516 void bb_progress_init(bb_progress_t *p) FAST_FUNC;
1517 void bb_progress_update(bb_progress_t *p, const char *curfile,
1518 off_t beg_range, off_t transferred,
1519 off_t totalsize) FAST_FUNC;
1521 extern const char *applet_name;
1522 /* "BusyBox vN.N.N (timestamp or extra_version)" */
1523 extern const char bb_banner[];
1524 extern const char bb_msg_memory_exhausted[];
1525 extern const char bb_msg_invalid_date[];
1526 extern const char bb_msg_read_error[];
1527 extern const char bb_msg_write_error[];
1528 extern const char bb_msg_unknown[];
1529 extern const char bb_msg_can_not_create_raw_socket[];
1530 extern const char bb_msg_perm_denied_are_you_root[];
1531 extern const char bb_msg_you_must_be_root[];
1532 extern const char bb_msg_requires_arg[];
1533 extern const char bb_msg_invalid_arg[];
1534 extern const char bb_msg_standard_input[];
1535 extern const char bb_msg_standard_output[];
1537 extern const char bb_str_default[];
1538 /* NB: (bb_hexdigits_upcase[i] | 0x20) -> lowercase hex digit */
1539 extern const char bb_hexdigits_upcase[];
1541 extern const char bb_path_mtab_file[];
1542 extern const char bb_path_passwd_file[];
1543 extern const char bb_path_shadow_file[];
1544 extern const char bb_path_gshadow_file[];
1545 extern const char bb_path_group_file[];
1546 extern const char bb_path_motd_file[];
1547 extern const char bb_path_wtmp_file[];
1548 extern const char bb_dev_null[];
1549 extern const char bb_busybox_exec_path[];
1550 /* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin,
1551 * but I want to save a few bytes here */
1552 extern const char bb_PATH_root_path[]; /* "PATH=/sbin:/usr/sbin:/bin:/usr/bin" */
1553 #define bb_default_root_path (bb_PATH_root_path + sizeof("PATH"))
1554 #define bb_default_path (bb_PATH_root_path + sizeof("PATH=/sbin:/usr/sbin"))
1556 extern const int const_int_0;
1557 extern const int const_int_1;
1560 /* Providing hard guarantee on minimum size (think of BUFSIZ == 128) */
1561 enum { COMMON_BUFSIZE = (BUFSIZ >= 256*sizeof(void*) ? BUFSIZ+1 : 256*sizeof(void*)) };
1562 extern char bb_common_bufsiz1[COMMON_BUFSIZE];
1563 /* This struct is deliberately not defined. */
1564 /* See docs/keep_data_small.txt */
1566 /* '*const' ptr makes gcc optimize code much better.
1567 * Magic prevents ptr_to_globals from going into rodata.
1568 * If you want to assign a value, use SET_PTR_TO_GLOBALS(x) */
1569 extern struct globals *const ptr_to_globals;
1570 /* At least gcc 3.4.6 on mipsel system needs optimization barrier */
1571 #define barrier() __asm__ __volatile__("":::"memory")
1572 #define SET_PTR_TO_GLOBALS(x) do { \
1573 (*(struct globals**)&ptr_to_globals) = (void*)(x); \
1577 /* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it,
1578 * use bb_default_login_shell and following defines.
1579 * If you change LIBBB_DEFAULT_LOGIN_SHELL,
1580 * don't forget to change increment constant. */
1581 #define LIBBB_DEFAULT_LOGIN_SHELL "-/bin/sh"
1582 extern const char bb_default_login_shell[];
1584 #define DEFAULT_SHELL (bb_default_login_shell+1)
1586 #define DEFAULT_SHELL_SHORT_NAME (bb_default_login_shell+6)
1588 #if ENABLE_FEATURE_DEVFS
1589 # define CURRENT_VC "/dev/vc/0"
1590 # define VC_1 "/dev/vc/1"
1591 # define VC_2 "/dev/vc/2"
1592 # define VC_3 "/dev/vc/3"
1593 # define VC_4 "/dev/vc/4"
1594 # define VC_5 "/dev/vc/5"
1595 #if defined(__sh__) || defined(__H8300H__) || defined(__H8300S__)
1596 /* Yes, this sucks, but both SH (including sh64) and H8 have a SCI(F) for their
1597 respective serial ports .. as such, we can't use the common device paths for
1599 # define SC_0 "/dev/ttsc/0"
1600 # define SC_1 "/dev/ttsc/1"
1601 # define SC_FORMAT "/dev/ttsc/%d"
1603 # define SC_0 "/dev/tts/0"
1604 # define SC_1 "/dev/tts/1"
1605 # define SC_FORMAT "/dev/tts/%d"
1607 # define VC_FORMAT "/dev/vc/%d"
1608 # define LOOP_FORMAT "/dev/loop/%d"
1609 # define LOOP_NAMESIZE (sizeof("/dev/loop/") + sizeof(int)*3 + 1)
1610 # define LOOP_NAME "/dev/loop/"
1611 # define FB_0 "/dev/fb/0"
1613 # define CURRENT_VC "/dev/tty0"
1614 # define VC_1 "/dev/tty1"
1615 # define VC_2 "/dev/tty2"
1616 # define VC_3 "/dev/tty3"
1617 # define VC_4 "/dev/tty4"
1618 # define VC_5 "/dev/tty5"
1619 #if defined(__sh__) || defined(__H8300H__) || defined(__H8300S__)
1620 # define SC_0 "/dev/ttySC0"
1621 # define SC_1 "/dev/ttySC1"
1622 # define SC_FORMAT "/dev/ttySC%d"
1624 # define SC_0 "/dev/ttyS0"
1625 # define SC_1 "/dev/ttyS1"
1626 # define SC_FORMAT "/dev/ttyS%d"
1628 # define VC_FORMAT "/dev/tty%d"
1629 # define LOOP_FORMAT "/dev/loop%d"
1630 # define LOOP_NAMESIZE (sizeof("/dev/loop") + sizeof(int)*3 + 1)
1631 # define LOOP_NAME "/dev/loop"
1632 # define FB_0 "/dev/fb0"
1635 /* The following devices are the same on devfs and non-devfs systems. */
1636 #define CURRENT_TTY "/dev/tty"
1637 #define DEV_CONSOLE "/dev/console"
1640 #define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0])))
1643 /* We redefine ctype macros. Unicode-correct handling of char types
1644 * can't be done with such byte-oriented operations anyway,
1645 * we don't lose anything.
1663 /* We save ~500 bytes on isdigit alone.
1664 * BTW, x86 likes (unsigned char) cast more than (unsigned). */
1666 /* These work the same for ASCII and Unicode,
1667 * assuming no one asks "is this a *Unicode* letter?" using isalpha(letter) */
1668 #define isascii(a) ((unsigned char)(a) <= 0x7f)
1669 #define isdigit(a) ((unsigned char)((a) - '0') <= 9)
1670 #define isupper(a) ((unsigned char)((a) - 'A') <= ('Z' - 'A'))
1671 #define islower(a) ((unsigned char)((a) - 'a') <= ('z' - 'a'))
1672 #define isalpha(a) ((unsigned char)(((a)|0x20) - 'a') <= ('z' - 'a'))
1673 #define isblank(a) ({ unsigned char bb__isblank = (a); bb__isblank == ' ' || bb__isblank == '\t'; })
1674 #define iscntrl(a) ({ unsigned char bb__iscntrl = (a); bb__iscntrl < ' ' || bb__iscntrl == 0x7f; })
1675 /* In POSIX/C locale isspace is only these chars: "\t\n\v\f\r" and space.
1676 * "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13.
1678 #define isspace(a) ({ unsigned char bb__isspace = (a) - 9; bb__isspace == (' ' - 9) || bb__isspace <= (13 - 9); })
1679 // Unsafe wrt NUL: #define ispunct(a) (strchr("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a)) != NULL)
1680 #define ispunct(a) (strchrnul("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a))[0])
1681 // Bigger code: #define isalnum(a) ({ unsigned char bb__isalnum = (a) - '0'; bb__isalnum <= 9 || ((bb__isalnum - ('A' - '0')) & 0xdf) <= 25; })
1682 #define isalnum(a) bb_ascii_isalnum(a)
1683 static ALWAYS_INLINE int bb_ascii_isalnum(unsigned char a)
1685 unsigned char b = a - '0';
1689 return b <= 'z' - 'a';
1691 #define isxdigit(a) bb_ascii_isxdigit(a)
1692 static ALWAYS_INLINE int bb_ascii_isxdigit(unsigned char a)
1694 unsigned char b = a - '0';
1698 return b <= 'f' - 'a';
1700 #define toupper(a) bb_ascii_toupper(a)
1701 static ALWAYS_INLINE unsigned char bb_ascii_toupper(unsigned char a)
1703 unsigned char b = a - 'a';
1704 if (b <= ('z' - 'a'))
1708 #define tolower(a) bb_ascii_tolower(a)
1709 static ALWAYS_INLINE unsigned char bb_ascii_tolower(unsigned char a)
1711 unsigned char b = a - 'A';
1712 if (b <= ('Z' - 'A'))
1717 /* In ASCII and Unicode, these are likely to be very different.
1718 * Let's prevent ambiguous usage from the start */
1719 #define isgraph(a) isgraph_is_ambiguous_dont_use(a)
1720 #define isprint(a) isprint_is_ambiguous_dont_use(a)
1721 /* NB: must not treat EOF as isgraph or isprint */
1722 #define isgraph_asciionly(a) ((unsigned)((a) - 0x21) <= 0x7e - 0x21)
1723 #define isprint_asciionly(a) ((unsigned)((a) - 0x20) <= 0x7e - 0x20)
1726 POP_SAVED_FUNCTION_VISIBILITY