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.
29 #include <sys/ioctl.h>
31 #include <sys/socket.h>
32 #if defined __FreeBSD__
33 # include <netinet/in.h>
34 # include <arpa/inet.h>
38 #include <sys/types.h>
43 /* Try to pull in PATH_MAX */
45 #include <sys/param.h>
58 #ifdef HAVE_SYS_STATFS_H
59 #include <sys/statfs.h>
63 #include <selinux/selinux.h>
64 #include <selinux/context.h>
65 #include <selinux/flask.h>
66 #include <selinux/av_permissions.h>
69 #if ENABLE_LOCALE_SUPPORT
72 # define setlocale(x,y) ((void)0)
81 #if ENABLE_FEATURE_SHADOWPASSWDS
82 # if !ENABLE_USE_BB_SHADOW
83 /* If using busybox's shadow implementation, do not include the shadow.h
84 * header as the toolchain may not provide it at all.
90 /* Some libc's forget to declare these, do it ourself */
92 extern char **environ;
93 #if defined(__GLIBC__) && __GLIBC__ < 2
94 int vdprintf(int d, const char *format, va_list ap);
96 /* klogctl is in libc's klog.h, but we cheat and not #include that */
97 int klogctl(int type, char *b, int len);
98 /* This is declared here rather than #including <libgen.h> in order to avoid
99 * confusing the two versions of basename. See the dirname/basename man page
101 #if !defined __FreeBSD__
102 char *dirname(char *path);
104 /* Include our own copy of struct sysinfo to avoid binary compatibility
105 * problems with Linux 2.4, which changed things. Grumble, grumble. */
107 long uptime; /* Seconds since boot */
108 unsigned long loads[3]; /* 1, 5, and 15 minute load averages */
109 unsigned long totalram; /* Total usable main memory size */
110 unsigned long freeram; /* Available memory size */
111 unsigned long sharedram; /* Amount of shared memory */
112 unsigned long bufferram; /* Memory used by buffers */
113 unsigned long totalswap; /* Total swap space size */
114 unsigned long freeswap; /* swap space still available */
115 unsigned short procs; /* Number of current processes */
116 unsigned short pad; /* Padding needed for m68k */
117 unsigned long totalhigh; /* Total high memory size */
118 unsigned long freehigh; /* Available high memory size */
119 unsigned int mem_unit; /* Memory unit size in bytes */
120 char _f[20 - 2 * sizeof(long) - sizeof(int)]; /* Padding: libc5 uses this.. */
122 int sysinfo(struct sysinfo* info);
125 /* Make all declarations hidden (-fvisibility flag only affects definitions) */
126 /* (don't include system headers after this until corresponding pop!) */
127 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
130 #if ENABLE_USE_BB_PWD_GRP
134 #if ENABLE_FEATURE_SHADOWPASSWDS
135 # if ENABLE_USE_BB_SHADOW
136 # include "shadow_.h"
140 /* Tested to work correctly with all int types (IIRC :]) */
141 #define MAXINT(T) (T)( \
144 : (T)~((T)1 << (sizeof(T)*8-1)) \
147 #define MININT(T) (T)( \
150 : ((T)1 << (sizeof(T)*8-1)) \
153 /* Large file support */
154 /* Note that CONFIG_LFS=y forces bbox to be built with all common ops
155 * (stat, lseek etc) mapped to "largefile" variants by libc.
156 * Practically it means that open() automatically has O_LARGEFILE added
157 * and all filesize/file_offset parameters and struct members are "large"
158 * (in today's world - signed 64bit). For full support of large files,
159 * we need a few helper #defines (below) and careful use of off_t
160 * instead of int/ssize_t. No lseek64(), O_LARGEFILE etc necessary */
162 /* CONFIG_LFS is on */
163 # if ULONG_MAX > 0xffffffff
164 /* "long" is long enough on this system */
165 typedef unsigned long uoff_t;
166 # define XATOOFF(a) xatoul_range(a, 0, LONG_MAX)
167 /* usage: sz = BB_STRTOOFF(s, NULL, 10); if (errno || sz < 0) die(); */
168 # define BB_STRTOOFF bb_strtoul
169 # define STRTOOFF strtoul
170 /* usage: printf("size: %"OFF_FMT"d (%"OFF_FMT"x)\n", sz, sz); */
173 /* "long" is too short, need "long long" */
174 typedef unsigned long long uoff_t;
175 # define XATOOFF(a) xatoull_range(a, 0, LLONG_MAX)
176 # define BB_STRTOOFF bb_strtoull
177 # define STRTOOFF strtoull
178 # define OFF_FMT "ll"
181 /* CONFIG_LFS is off */
182 # if UINT_MAX == 0xffffffff
183 /* While sizeof(off_t) == sizeof(int), off_t is typedef'ed to long anyway.
184 * gcc will throw warnings on printf("%d", off_t). Crap... */
185 typedef unsigned long uoff_t;
186 # define XATOOFF(a) xatoi_u(a)
187 # define BB_STRTOOFF bb_strtou
188 # define STRTOOFF strtol
191 typedef unsigned long uoff_t;
192 # define XATOOFF(a) xatoul_range(a, 0, LONG_MAX)
193 # define BB_STRTOOFF bb_strtoul
194 # define STRTOOFF strtol
198 /* scary. better ideas? (but do *test* them first!) */
199 #define OFF_T_MAX ((off_t)~((off_t)1 << (sizeof(off_t)*8-1)))
201 /* Some useful definitions */
203 #define FALSE ((int) 0)
205 #define TRUE ((int) 1)
207 #define SKIP ((int) 2)
210 #define MTAB_GETMOUNTPT '1'
211 #define MTAB_GETDEVICE '2'
213 #define BUF_SIZE 8192
214 #define EXPAND_ALLOC 1024
216 /* Macros for min/max. */
218 #define MIN(a,b) (((a)<(b))?(a):(b))
222 #define MAX(a,b) (((a)>(b))?(a):(b))
225 /* buffer allocation schemes */
226 #if ENABLE_FEATURE_BUFFERS_GO_ON_STACK
227 #define RESERVE_CONFIG_BUFFER(buffer,len) char buffer[len]
228 #define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char buffer[len]
229 #define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
231 #if ENABLE_FEATURE_BUFFERS_GO_IN_BSS
232 #define RESERVE_CONFIG_BUFFER(buffer,len) static char buffer[len]
233 #define RESERVE_CONFIG_UBUFFER(buffer,len) static unsigned char buffer[len]
234 #define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
236 #define RESERVE_CONFIG_BUFFER(buffer,len) char *buffer = xmalloc(len)
237 #define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char *buffer = xmalloc(len)
238 #define RELEASE_CONFIG_BUFFER(buffer) free(buffer)
242 #if defined(__GLIBC__)
243 /* glibc uses __errno_location() to get a ptr to errno */
244 /* We can just memorize it once - no multithreading in busybox :) */
245 extern int *const bb_errno;
247 #define errno (*bb_errno)
250 unsigned long long monotonic_ns(void) FAST_FUNC;
251 unsigned long long monotonic_us(void) FAST_FUNC;
252 unsigned long long monotonic_ms(void) FAST_FUNC;
253 unsigned monotonic_sec(void) FAST_FUNC;
255 extern void chomp(char *s) FAST_FUNC;
256 extern void trim(char *s) FAST_FUNC;
257 extern char *skip_whitespace(const char *) FAST_FUNC;
258 extern char *skip_non_whitespace(const char *) FAST_FUNC;
259 extern char *strrstr(const char *haystack, const char *needle) FAST_FUNC;
261 //TODO: supply a pointer to char[11] buffer (avoid statics)?
262 extern const char *bb_mode_string(mode_t mode) FAST_FUNC;
263 extern int is_directory(const char *name, int followLinks, struct stat *statBuf) FAST_FUNC;
264 enum { /* DO NOT CHANGE THESE VALUES! cp.c, mv.c, install.c depend on them. */
265 FILEUTILS_PRESERVE_STATUS = 1 << 0, /* -p */
266 FILEUTILS_DEREFERENCE = 1 << 1, /* !-d */
267 FILEUTILS_RECUR = 1 << 2, /* -R */
268 FILEUTILS_FORCE = 1 << 3, /* -f */
269 FILEUTILS_INTERACTIVE = 1 << 4, /* -i */
270 FILEUTILS_MAKE_HARDLINK = 1 << 5, /* -l */
271 FILEUTILS_MAKE_SOFTLINK = 1 << 6, /* -s */
272 FILEUTILS_DEREF_SOFTLINK = 1 << 7, /* -L */
273 FILEUTILS_DEREFERENCE_L0 = 1 << 8, /* -H */
275 FILEUTILS_PRESERVE_SECURITY_CONTEXT = 1 << 9, /* -c */
276 FILEUTILS_SET_SECURITY_CONTEXT = 1 << 10,
279 #define FILEUTILS_CP_OPTSTR "pdRfilsLH" IF_SELINUX("c")
280 extern int remove_file(const char *path, int flags) FAST_FUNC;
281 /* NB: without FILEUTILS_RECUR in flags, it will basically "cat"
282 * the source, not copy (unless "source" is a directory).
283 * This makes "cp /dev/null file" and "install /dev/null file" (!!!)
284 * work coreutils-compatibly. */
285 extern int copy_file(const char *source, const char *dest, int flags) FAST_FUNC;
288 ACTION_RECURSE = (1 << 0),
289 ACTION_FOLLOWLINKS = (1 << 1),
290 ACTION_FOLLOWLINKS_L0 = (1 << 2),
291 ACTION_DEPTHFIRST = (1 << 3),
292 /*ACTION_REVERSE = (1 << 4), - unused */
293 ACTION_QUIET = (1 << 5),
294 ACTION_DANGLING_OK = (1 << 6),
296 typedef uint8_t recurse_flags_t;
297 extern int recursive_action(const char *fileName, unsigned flags,
298 int FAST_FUNC (*fileAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
299 int FAST_FUNC (*dirAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
300 void* userData, unsigned depth) FAST_FUNC;
301 extern int device_open(const char *device, int mode) FAST_FUNC;
302 enum { GETPTY_BUFSIZE = 16 }; /* more than enough for "/dev/ttyXXX" */
303 extern int xgetpty(char *line) FAST_FUNC;
304 extern int get_console_fd_or_die(void) FAST_FUNC;
305 extern void console_make_active(int fd, const int vt_num) FAST_FUNC;
306 extern char *find_block_device(const char *path) FAST_FUNC;
307 /* bb_copyfd_XX print read/write errors and return -1 if they occur */
308 extern off_t bb_copyfd_eof(int fd1, int fd2) FAST_FUNC;
309 extern off_t bb_copyfd_size(int fd1, int fd2, off_t size) FAST_FUNC;
310 extern void bb_copyfd_exact_size(int fd1, int fd2, off_t size) FAST_FUNC;
311 /* "short" copy can be detected by return value < size */
312 /* this helper yells "short read!" if param is not -1 */
313 extern void complain_copyfd_and_die(off_t sz) NORETURN FAST_FUNC;
314 extern char bb_process_escape_sequence(const char **ptr) FAST_FUNC;
315 /* xxxx_strip version can modify its parameter:
319 * "abc/def/" -> "def" !!
321 extern char *bb_get_last_path_component_strip(char *path) FAST_FUNC;
322 /* "abc/def/" -> "" and it never modifies 'path' */
323 extern char *bb_get_last_path_component_nostrip(const char *path) FAST_FUNC;
325 int ndelay_on(int fd) FAST_FUNC;
326 int ndelay_off(int fd) FAST_FUNC;
327 int close_on_exec_on(int fd) FAST_FUNC;
328 void xdup2(int, int) FAST_FUNC;
329 void xmove_fd(int, int) FAST_FUNC;
332 DIR *xopendir(const char *path) FAST_FUNC;
333 DIR *warn_opendir(const char *path) FAST_FUNC;
335 /* UNUSED: char *xmalloc_realpath(const char *path) FAST_FUNC RETURNS_MALLOC; */
336 char *xmalloc_readlink(const char *path) FAST_FUNC RETURNS_MALLOC;
337 char *xmalloc_readlink_or_warn(const char *path) FAST_FUNC RETURNS_MALLOC;
338 /* !RETURNS_MALLOC: it's a realloc-like function */
339 char *xrealloc_getcwd_or_warn(char *cwd) FAST_FUNC;
341 char *xmalloc_follow_symlinks(const char *path) FAST_FUNC RETURNS_MALLOC;
345 /* bb_signals(BB_FATAL_SIGS, handler) catches all signals which
346 * otherwise would kill us, except for those resulting from bugs:
347 * SIGSEGV, SIGILL, SIGFPE.
348 * Other fatal signals not included (TODO?):
349 * SIGBUS Bus error (bad memory access)
350 * SIGPOLL Pollable event. Synonym of SIGIO
351 * SIGPROF Profiling timer expired
352 * SIGSYS Bad argument to routine
353 * SIGTRAP Trace/breakpoint trap
355 * The only known arch with some of these sigs not fitting
356 * into 32 bits is parisc (SIGXCPU=33, SIGXFSZ=34, SIGSTKFLT=36).
357 * Dance around with long long to guard against that...
359 BB_FATAL_SIGS = (int)(0
363 + (1LL << SIGPIPE) // Write to pipe with no readers
364 + (1LL << SIGQUIT) // Quit from keyboard
365 + (1LL << SIGABRT) // Abort signal from abort(3)
366 + (1LL << SIGALRM) // Timer signal from alarm(2)
367 + (1LL << SIGVTALRM) // Virtual alarm clock
368 + (1LL << SIGXCPU) // CPU time limit exceeded
369 + (1LL << SIGXFSZ) // File size limit exceeded
370 + (1LL << SIGUSR1) // Yes kids, these are also fatal!
374 void bb_signals(int sigs, void (*f)(int)) FAST_FUNC;
375 /* Unlike signal() and bb_signals, sets handler with sigaction()
376 * and in a way that while signal handler is run, no other signals
377 * will be blocked; syscalls will not be restarted: */
378 void bb_signals_recursive_norestart(int sigs, void (*f)(int)) FAST_FUNC;
379 /* syscalls like read() will be interrupted with EINTR: */
380 void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
381 /* syscalls like read() won't be interrupted (though select/poll will be): */
382 void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
383 void wait_for_any_sig(void) FAST_FUNC;
384 void kill_myself_with_sig(int sig) NORETURN FAST_FUNC;
385 void sig_block(int sig) FAST_FUNC;
386 void sig_unblock(int sig) FAST_FUNC;
387 /* Will do sigaction(signum, act, NULL): */
388 int sigaction_set(int sig, const struct sigaction *act) FAST_FUNC;
389 /* SIG_BLOCK/SIG_UNBLOCK all signals: */
390 int sigprocmask_allsigs(int how) FAST_FUNC;
391 /* Standard handler which just records signo */
392 extern smallint bb_got_signal;
393 void record_signo(int signo); /* not FAST_FUNC! */
396 void xsetgid(gid_t gid) FAST_FUNC;
397 void xsetuid(uid_t uid) FAST_FUNC;
398 void xchdir(const char *path) FAST_FUNC;
399 void xchroot(const char *path) FAST_FUNC;
400 void xsetenv(const char *key, const char *value) FAST_FUNC;
401 void bb_unsetenv(const char *key) FAST_FUNC;
402 void xunlink(const char *pathname) FAST_FUNC;
403 void xstat(const char *pathname, struct stat *buf) FAST_FUNC;
404 int xopen(const char *pathname, int flags) FAST_FUNC;
405 int xopen_nonblocking(const char *pathname) FAST_FUNC;
406 int xopen3(const char *pathname, int flags, int mode) FAST_FUNC;
407 int open_or_warn(const char *pathname, int flags) FAST_FUNC;
408 int open3_or_warn(const char *pathname, int flags, int mode) FAST_FUNC;
409 int open_or_warn_stdin(const char *pathname) FAST_FUNC;
410 void xrename(const char *oldpath, const char *newpath) FAST_FUNC;
411 int rename_or_warn(const char *oldpath, const char *newpath) FAST_FUNC;
412 off_t xlseek(int fd, off_t offset, int whence) FAST_FUNC;
413 off_t fdlength(int fd) FAST_FUNC;
415 uoff_t FAST_FUNC get_volume_size_in_bytes(int fd,
416 const char *override,
417 unsigned override_units,
420 void xpipe(int filedes[2]) FAST_FUNC;
421 /* In this form code with pipes is much more readable */
422 struct fd_pair { int rd; int wr; };
423 #define piped_pair(pair) pipe(&((pair).rd))
424 #define xpiped_pair(pair) xpipe(&((pair).rd))
426 /* Useful for having small structure members/global variables */
427 typedef int8_t socktype_t;
428 typedef int8_t family_t;
429 struct BUG_too_small {
430 char BUG_socktype_t_too_small[(0
437 char BUG_family_t_too_small[(0
454 void parse_datestr(const char *date_str, struct tm *ptm) FAST_FUNC;
455 time_t validate_tm_time(const char *date_str, struct tm *ptm) FAST_FUNC;
458 int xsocket(int domain, int type, int protocol) FAST_FUNC;
459 void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen) FAST_FUNC;
460 void xlisten(int s, int backlog) FAST_FUNC;
461 void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen) FAST_FUNC;
462 ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to,
463 socklen_t tolen) FAST_FUNC;
464 /* SO_REUSEADDR allows a server to rebind to an address that is already
465 * "in use" by old connections to e.g. previous server instance which is
466 * killed or crashed. Without it bind will fail until all such connections
467 * time out. Linux does not allow multiple live binds on same ip:port
468 * regardless of SO_REUSEADDR (unlike some other flavors of Unix).
469 * Turn it on before you call bind(). */
470 void setsockopt_reuseaddr(int fd) FAST_FUNC; /* On Linux this never fails. */
471 int setsockopt_broadcast(int fd) FAST_FUNC;
472 int setsockopt_bindtodevice(int fd, const char *iface) FAST_FUNC;
473 /* NB: returns port in host byte order */
474 unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port) FAST_FUNC;
475 typedef struct len_and_sockaddr {
479 struct sockaddr_in sin;
480 #if ENABLE_FEATURE_IPV6
481 struct sockaddr_in6 sin6;
486 LSA_LEN_SIZE = offsetof(len_and_sockaddr, u),
487 LSA_SIZEOF_SA = sizeof(
490 struct sockaddr_in sin;
491 #if ENABLE_FEATURE_IPV6
492 struct sockaddr_in6 sin6;
497 /* Create stream socket, and allocate suitable lsa.
498 * (lsa of correct size and lsa->sa.sa_family (AF_INET/AF_INET6))
499 * af == AF_UNSPEC will result in trying to create IPv6 socket,
500 * and if kernel doesn't support it, fall back to IPv4.
501 * This is useful if you plan to bind to resulting local lsa.
503 #if ENABLE_FEATURE_IPV6
504 int xsocket_type(len_and_sockaddr **lsap, int af, int sock_type) FAST_FUNC;
506 int xsocket_type(len_and_sockaddr **lsap, int sock_type) FAST_FUNC;
507 #define xsocket_type(lsap, af, sock_type) xsocket_type((lsap), (sock_type))
509 int xsocket_stream(len_and_sockaddr **lsap) FAST_FUNC;
510 /* Create server socket bound to bindaddr:port. bindaddr can be NULL,
511 * numeric IP ("N.N.N.N") or numeric IPv6 address,
512 * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
513 * Only if there is no suffix, port argument is used */
514 /* NB: these set SO_REUSEADDR before bind */
515 int create_and_bind_stream_or_die(const char *bindaddr, int port) FAST_FUNC;
516 int create_and_bind_dgram_or_die(const char *bindaddr, int port) FAST_FUNC;
517 /* Create client TCP socket connected to peer:port. Peer cannot be NULL.
518 * Peer can be numeric IP ("N.N.N.N"), numeric IPv6 address or hostname,
519 * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
520 * If there is no suffix, port argument is used */
521 int create_and_connect_stream_or_die(const char *peer, int port) FAST_FUNC;
522 /* Connect to peer identified by lsa */
523 int xconnect_stream(const len_and_sockaddr *lsa) FAST_FUNC;
524 /* Get local address of bound or accepted socket */
525 len_and_sockaddr *get_sock_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
526 /* Return malloc'ed len_and_sockaddr with socket address of host:port
527 * Currently will return IPv4 or IPv6 sockaddrs only
528 * (depending on host), but in theory nothing prevents e.g.
529 * UNIX socket address being returned, IPX sockaddr etc...
530 * On error does bb_error_msg and returns NULL */
531 len_and_sockaddr* host2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
532 /* Version which dies on error */
533 len_and_sockaddr* xhost2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
534 len_and_sockaddr* xdotted2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
535 /* Same, useful if you want to force family (e.g. IPv6) */
536 #if !ENABLE_FEATURE_IPV6
537 #define host_and_af2sockaddr(host, port, af) host2sockaddr((host), (port))
538 #define xhost_and_af2sockaddr(host, port, af) xhost2sockaddr((host), (port))
540 len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
541 len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
543 /* Assign sin[6]_port member if the socket is an AF_INET[6] one,
544 * otherwise no-op. Useful for ftp.
545 * NB: does NOT do htons() internally, just direct assignment. */
546 void set_nport(len_and_sockaddr *lsa, unsigned port) FAST_FUNC;
547 /* Retrieve sin[6]_port or return -1 for non-INET[6] lsa's */
548 int get_nport(const struct sockaddr *sa) FAST_FUNC;
549 /* Reverse DNS. Returns NULL on failure. */
550 char* xmalloc_sockaddr2host(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
551 /* This one doesn't append :PORTNUM */
552 char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
553 /* This one also doesn't fall back to dotted IP (returns NULL) */
554 char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
555 /* inet_[ap]ton on steroids */
556 char* xmalloc_sockaddr2dotted(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
557 char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
558 // "old" (ipv4 only) API
559 // users: traceroute.c hostname.c - use _list_ of all IPs
560 struct hostent *xgethostbyname(const char *name) FAST_FUNC;
561 // Also mount.c and inetd.c are using gethostbyname(),
562 // + inet_common.c has additional IPv4-only stuff
565 void socket_want_pktinfo(int fd) FAST_FUNC;
566 ssize_t send_to_from(int fd, void *buf, size_t len, int flags,
567 const struct sockaddr *to,
568 const struct sockaddr *from,
569 socklen_t tolen) FAST_FUNC;
570 ssize_t recv_from_to(int fd, void *buf, size_t len, int flags,
571 struct sockaddr *from,
573 socklen_t sa_size) FAST_FUNC;
576 char *xstrdup(const char *s) FAST_FUNC RETURNS_MALLOC;
577 char *xstrndup(const char *s, int n) FAST_FUNC RETURNS_MALLOC;
578 void overlapping_strcpy(char *dst, const char *src) FAST_FUNC;
579 char *safe_strncpy(char *dst, const char *src, size_t size) FAST_FUNC;
580 char *strncpy_IFNAMSIZ(char *dst, const char *src) FAST_FUNC;
581 /* Guaranteed to NOT be a macro (smallest code). Saves nearly 2k on uclibc.
582 * But potentially slow, don't use in one-billion-times loops */
583 int bb_putchar(int ch) FAST_FUNC;
584 char *xasprintf(const char *format, ...) __attribute__ ((format(printf, 1, 2))) FAST_FUNC RETURNS_MALLOC;
585 // gcc-4.1.1 still isn't good enough at optimizing it
586 // (+200 bytes compared to macro)
587 //static ALWAYS_INLINE
588 //int LONE_DASH(const char *s) { return s[0] == '-' && !s[1]; }
589 //static ALWAYS_INLINE
590 //int NOT_LONE_DASH(const char *s) { return s[0] != '-' || s[1]; }
591 #define LONE_DASH(s) ((s)[0] == '-' && !(s)[1])
592 #define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1])
593 #define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1])
594 #define NOT_LONE_CHAR(s,c) ((s)[0] != (c) || (s)[1])
595 #define DOT_OR_DOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2])))
597 typedef struct uni_stat_t {
599 unsigned unicode_count;
600 unsigned unicode_width;
602 /* Returns a string with unprintable chars replaced by '?' or
603 * SUBST_WCHAR. This function is unicode-aware. */
604 const char* FAST_FUNC printable_string(uni_stat_t *stats, const char *str);
605 /* Prints unprintable char ch as ^C or M-c to file
606 * (M-c is used only if ch is ORed with PRINTABLE_META),
607 * else it is printed as-is (except for ch = 0x9b) */
608 enum { PRINTABLE_META = 0x100 };
609 void fputc_printable(int ch, FILE *file) FAST_FUNC;
611 /* dmalloc will redefine these to it's own implementation. It is safe
612 * to have the prototypes here unconditionally. */
613 void *malloc_or_warn(size_t size) FAST_FUNC RETURNS_MALLOC;
614 void *xmalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
615 void *xzalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
616 void *xrealloc(void *old, size_t size) FAST_FUNC;
617 /* After xrealloc_vector(v, 4, idx) it's ok to use
618 * at least v[idx] and v[idx+1], for all idx values.
619 * shift specifies how many new elements are added (1: 2, 2: 4... 8: 256...)
620 * when all elements are used up. New elements are zeroed out. */
621 #define xrealloc_vector(vector, shift, idx) \
622 xrealloc_vector_helper((vector), (sizeof((vector)[0]) << 8) + (shift), (idx))
623 void* xrealloc_vector_helper(void *vector, unsigned sizeof_and_shift, int idx) FAST_FUNC;
626 extern ssize_t safe_read(int fd, void *buf, size_t count) FAST_FUNC;
627 extern ssize_t nonblock_safe_read(int fd, void *buf, size_t count) FAST_FUNC;
628 // NB: will return short read on error, not -1,
629 // if some data was read before error occurred
630 extern ssize_t full_read(int fd, void *buf, size_t count) FAST_FUNC;
631 extern void xread(int fd, void *buf, size_t count) FAST_FUNC;
632 extern unsigned char xread_char(int fd) FAST_FUNC;
633 extern ssize_t read_close(int fd, void *buf, size_t maxsz) FAST_FUNC;
634 extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz) FAST_FUNC;
635 // Reads one line a-la fgets (but doesn't save terminating '\n').
636 // Reads byte-by-byte. Useful when it is important to not read ahead.
637 // Bytes are appended to pfx (which must be malloced, or NULL).
638 extern char *xmalloc_reads(int fd, char *pfx, size_t *maxsz_p) FAST_FUNC;
639 /* Reads block up to *maxsz_p (default: INT_MAX - 4095) */
640 extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
641 /* Returns NULL if file can't be opened (default max size: INT_MAX - 4095) */
642 extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
643 /* Autodetects .gz etc */
644 extern int open_zipped(const char *fname) FAST_FUNC;
645 extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
646 /* Never returns NULL */
647 extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
649 extern ssize_t safe_write(int fd, const void *buf, size_t count) FAST_FUNC;
650 // NB: will return short write on error, not -1,
651 // if some data was written before error occurred
652 extern ssize_t full_write(int fd, const void *buf, size_t count) FAST_FUNC;
653 extern void xwrite(int fd, const void *buf, size_t count) FAST_FUNC;
654 extern void xwrite_str(int fd, const char *str) FAST_FUNC;
655 extern void xopen_xwrite_close(const char* file, const char *str) FAST_FUNC;
657 /* Close fd, but check for failures (some types of write errors) */
658 extern void xclose(int fd) FAST_FUNC;
660 /* Reads and prints to stdout till eof, then closes FILE. Exits on error: */
661 extern void xprint_and_close_file(FILE *file) FAST_FUNC;
663 extern char *bb_get_chunk_from_file(FILE *file, int *end) FAST_FUNC;
664 extern char *bb_get_chunk_with_continuation(FILE *file, int *end, int *lineno) FAST_FUNC;
665 /* Reads up to (and including) TERMINATING_STRING: */
666 extern char *xmalloc_fgets_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
667 /* Same, with limited max size, and returns the length (excluding NUL): */
668 extern char *xmalloc_fgets_str_len(FILE *file, const char *terminating_string, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
669 /* Chops off TERMINATING_STRING from the end: */
670 extern char *xmalloc_fgetline_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
671 /* Reads up to (and including) "\n" or NUL byte: */
672 extern char *xmalloc_fgets(FILE *file) FAST_FUNC RETURNS_MALLOC;
673 /* Chops off '\n' from the end, unlike fgets: */
674 extern char *xmalloc_fgetline(FILE *file) FAST_FUNC RETURNS_MALLOC;
675 /* Same, but doesn't try to conserve space (may have some slack after the end) */
676 /* extern char *xmalloc_fgetline_fast(FILE *file) FAST_FUNC RETURNS_MALLOC; */
678 void die_if_ferror(FILE *file, const char *msg) FAST_FUNC;
679 void die_if_ferror_stdout(void) FAST_FUNC;
680 int fflush_all(void) FAST_FUNC;
681 void fflush_stdout_and_exit(int retval) NORETURN FAST_FUNC;
682 int fclose_if_not_stdin(FILE *file) FAST_FUNC;
683 FILE* xfopen(const char *filename, const char *mode) FAST_FUNC;
684 /* Prints warning to stderr and returns NULL on failure: */
685 FILE* fopen_or_warn(const char *filename, const char *mode) FAST_FUNC;
686 /* "Opens" stdin if filename is special, else just opens file: */
687 FILE* xfopen_stdin(const char *filename) FAST_FUNC;
688 FILE* fopen_or_warn_stdin(const char *filename) FAST_FUNC;
689 FILE* fopen_for_read(const char *path) FAST_FUNC;
690 FILE* xfopen_for_read(const char *path) FAST_FUNC;
691 FILE* fopen_for_write(const char *path) FAST_FUNC;
692 FILE* xfopen_for_write(const char *path) FAST_FUNC;
693 FILE* xfdopen_for_read(int fd) FAST_FUNC;
694 FILE* xfdopen_for_write(int fd) FAST_FUNC;
696 int bb_pstrcmp(const void *a, const void *b) /* not FAST_FUNC! */;
697 void qsort_string_vector(char **sv, unsigned count) FAST_FUNC;
699 /* Wrapper which restarts poll on EINTR or ENOMEM.
700 * On other errors complains [perror("poll")] and returns.
701 * Warning! May take (much) longer than timeout_ms to return!
702 * If this is a problem, use bare poll and open-code EINTR/ENOMEM handling */
703 int safe_poll(struct pollfd *ufds, nfds_t nfds, int timeout_ms) FAST_FUNC;
705 char *safe_gethostname(void) FAST_FUNC;
706 char *safe_getdomainname(void) FAST_FUNC;
708 /* Convert each alpha char in str to lower-case */
709 char* str_tolower(char *str) FAST_FUNC;
711 char *utoa(unsigned n) FAST_FUNC;
712 char *itoa(int n) FAST_FUNC;
713 /* Returns a pointer past the formatted number, does NOT null-terminate */
714 char *utoa_to_buf(unsigned n, char *buf, unsigned buflen) FAST_FUNC;
715 char *itoa_to_buf(int n, char *buf, unsigned buflen) FAST_FUNC;
716 /* Intelligent formatters of bignums */
717 void smart_ulltoa4(unsigned long long ul, char buf[5], const char *scale) FAST_FUNC;
718 void smart_ulltoa5(unsigned long long ul, char buf[5], const char *scale) FAST_FUNC;
719 /* If block_size == 0, display size without fractional part,
720 * else display (size * block_size) with one decimal digit.
721 * If display_unit == 0, show value no bigger than 1024 with suffix (K,M,G...),
722 * else divide by display_unit and do not use suffix. */
723 #define HUMAN_READABLE_MAX_WIDTH 7 /* "1024.0G" */
724 #define HUMAN_READABLE_MAX_WIDTH_STR "7"
725 //TODO: provide pointer to buf (avoid statics)?
726 const char *make_human_readable_str(unsigned long long size,
727 unsigned long block_size, unsigned long display_unit) FAST_FUNC;
728 /* Put a string of hex bytes ("1b2e66fe"...), return advanced pointer */
729 char *bin2hex(char *buf, const char *cp, int count) FAST_FUNC;
731 /* Generate a UUID */
732 void generate_uuid(uint8_t *buf) FAST_FUNC;
734 /* Last element is marked by mult == 0 */
741 /* Using xatoi() instead of naive atoi() is not always convenient -
742 * in many places people want *non-negative* values, but store them
743 * in signed int. Therefore we need this one:
744 * dies if input is not in [0, INT_MAX] range. Also will reject '-0' etc */
745 int xatoi_u(const char *numstr) FAST_FUNC;
746 /* Useful for reading port numbers */
747 uint16_t xatou16(const char *numstr) FAST_FUNC;
750 /* These parse entries in /etc/passwd and /etc/group. This is desirable
751 * for BusyBox since we want to avoid using the glibc NSS stuff, which
752 * increases target size and is often not needed on embedded systems. */
753 long xuname2uid(const char *name) FAST_FUNC;
754 long xgroup2gid(const char *name) FAST_FUNC;
755 /* wrapper: allows string to contain numeric uid or gid */
756 unsigned long get_ug_id(const char *s, long FAST_FUNC (*xname2id)(const char *)) FAST_FUNC;
757 /* from chpst. Does not die, returns 0 on failure */
762 /* always sets uid and gid */
763 int get_uidgid(struct bb_uidgid_t*, const char*, int numeric_ok) FAST_FUNC;
764 /* always sets uid and gid, allows numeric; exits on failure */
765 void xget_uidgid(struct bb_uidgid_t*, const char*) FAST_FUNC;
766 /* chown-like handling of "user[:[group]" */
767 void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group) FAST_FUNC;
768 struct passwd* xgetpwnam(const char *name) FAST_FUNC;
769 struct group* xgetgrnam(const char *name) FAST_FUNC;
770 struct passwd* xgetpwuid(uid_t uid) FAST_FUNC;
771 struct group* xgetgrgid(gid_t gid) FAST_FUNC;
772 char* xuid2uname(uid_t uid) FAST_FUNC;
773 char* xgid2group(gid_t gid) FAST_FUNC;
774 char* uid2uname(uid_t uid) FAST_FUNC;
775 char* gid2group(gid_t gid) FAST_FUNC;
776 char* uid2uname_utoa(long uid) FAST_FUNC;
777 char* gid2group_utoa(long gid) FAST_FUNC;
778 /* versions which cache results (useful for ps, ls etc) */
779 const char* get_cached_username(uid_t uid) FAST_FUNC;
780 const char* get_cached_groupname(gid_t gid) FAST_FUNC;
781 void clear_username_cache(void) FAST_FUNC;
782 /* internally usernames are saved in fixed-sized char[] buffers */
783 enum { USERNAME_MAX_SIZE = 16 - sizeof(int) };
784 #if ENABLE_FEATURE_CHECK_NAMES
785 void die_if_bad_username(const char* name) FAST_FUNC;
787 #define die_if_bad_username(name) ((void)(name))
790 int execable_file(const char *name) FAST_FUNC;
791 char *find_execable(const char *filename, char **PATHp) FAST_FUNC;
792 int exists_execable(const char *filename) FAST_FUNC;
794 /* BB_EXECxx always execs (it's not doing NOFORK/NOEXEC stuff),
795 * but it may exec busybox and call applet instead of searching PATH.
797 #if ENABLE_FEATURE_PREFER_APPLETS
798 int bb_execvp(const char *file, char *const argv[]) FAST_FUNC;
799 #define BB_EXECVP(prog,cmd) bb_execvp(prog,cmd)
800 #define BB_EXECLP(prog,cmd,...) \
801 execlp((find_applet_by_name(prog) >= 0) ? CONFIG_BUSYBOX_EXEC_PATH : prog, \
804 #define BB_EXECVP(prog,cmd) execvp(prog,cmd)
805 #define BB_EXECLP(prog,cmd,...) execlp(prog,cmd, __VA_ARGS__)
808 /* NOMMU friendy fork+exec */
809 pid_t spawn(char **argv) FAST_FUNC;
810 pid_t xspawn(char **argv) FAST_FUNC;
812 pid_t safe_waitpid(pid_t pid, int *wstat, int options) FAST_FUNC;
813 /* Unlike waitpid, waits ONLY for one process.
814 * It's safe to pass negative 'pids' from failed [v]fork -
815 * wait4pid will return -1 (and will not clobber [v]fork's errno).
816 * IOW: rc = wait4pid(spawn(argv));
817 * if (rc < 0) bb_perror_msg("%s", argv[0]);
818 * if (rc > 0) bb_error_msg("exit code: %d", rc);
820 int wait4pid(pid_t pid) FAST_FUNC;
821 pid_t wait_any_nohang(int *wstat) FAST_FUNC;
822 /* wait4pid(spawn(argv)) + NOFORK/NOEXEC (if configured) */
823 int spawn_and_wait(char **argv) FAST_FUNC;
824 struct nofork_save_area {
826 const char *applet_name;
827 int xfunc_error_retval;
828 uint32_t option_mask32;
832 void save_nofork_data(struct nofork_save_area *save) FAST_FUNC;
833 void restore_nofork_data(struct nofork_save_area *save) FAST_FUNC;
834 /* Does NOT check that applet is NOFORK, just blindly runs it */
835 int run_nofork_applet(int applet_no, char **argv) FAST_FUNC;
836 int run_nofork_applet_prime(struct nofork_save_area *old, int applet_no, char **argv) FAST_FUNC;
838 /* Helpers for daemonization.
840 * bb_daemonize(flags) = daemonize, does not compile on NOMMU
842 * bb_daemonize_or_rexec(flags, argv) = daemonizes on MMU (and ignores argv),
843 * rexec's itself on NOMMU with argv passed as command line.
844 * Thus bb_daemonize_or_rexec may cause your <applet>_main() to be re-executed
845 * from the start. (It will detect it and not reexec again second time).
846 * You have to audit carefully that you don't do something twice as a result
847 * (opening files/sockets, parsing config files etc...)!
849 * Both of the above will redirect fd 0,1,2 to /dev/null and drop ctty
850 * (will do setsid()).
852 * fork_or_rexec(argv) = bare-bones "fork" on MMU,
853 * "vfork + re-exec ourself" on NOMMU. No fd redirection, no setsid().
854 * On MMU ignores argv.
856 * Helper for network daemons in foreground mode:
858 * bb_sanitize_stdio() = make sure that fd 0,1,2 are opened by opening them
859 * to /dev/null if they are not.
862 DAEMON_CHDIR_ROOT = 1,
863 DAEMON_DEVNULL_STDIO = 2,
864 DAEMON_CLOSE_EXTRA_FDS = 4,
865 DAEMON_ONLY_SANITIZE = 8, /* internal use */
868 pid_t fork_or_rexec(void) FAST_FUNC;
869 enum { re_execed = 0 };
870 # define fork_or_rexec(argv) fork_or_rexec()
871 # define bb_daemonize_or_rexec(flags, argv) bb_daemonize_or_rexec(flags)
872 # define bb_daemonize(flags) bb_daemonize_or_rexec(flags, bogus)
874 void re_exec(char **argv) NORETURN FAST_FUNC;
875 pid_t fork_or_rexec(char **argv) FAST_FUNC;
876 extern bool re_execed;
877 int BUG_fork_is_unavailable_on_nommu(void) FAST_FUNC;
878 int BUG_daemon_is_unavailable_on_nommu(void) FAST_FUNC;
879 void BUG_bb_daemonize_is_unavailable_on_nommu(void) FAST_FUNC;
880 # define fork() BUG_fork_is_unavailable_on_nommu()
881 # define daemon(a,b) BUG_daemon_is_unavailable_on_nommu()
882 # define bb_daemonize(a) BUG_bb_daemonize_is_unavailable_on_nommu()
884 void bb_daemonize_or_rexec(int flags, char **argv) FAST_FUNC;
885 void bb_sanitize_stdio(void) FAST_FUNC;
886 /* Clear dangerous stuff, set PATH. Return 1 if was run by different user. */
887 int sanitize_env_if_suid(void) FAST_FUNC;
890 char* single_argv(char **argv) FAST_FUNC;
891 extern const char *const bb_argv_dash[]; /* "-", NULL */
892 extern const char *opt_complementary;
893 #if ENABLE_LONG_OPTS || ENABLE_FEATURE_GETOPT_LONG
894 #define No_argument "\0"
895 #define Required_argument "\001"
896 #define Optional_argument "\002"
897 extern const char *applet_long_options;
899 extern uint32_t option_mask32;
900 extern uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC;
903 typedef struct llist_t {
905 struct llist_t *link;
907 void llist_add_to(llist_t **old_head, void *data) FAST_FUNC;
908 void llist_add_to_end(llist_t **list_head, void *data) FAST_FUNC;
909 void *llist_pop(llist_t **elm) FAST_FUNC;
910 void llist_unlink(llist_t **head, llist_t *elm) FAST_FUNC;
911 void llist_free(llist_t *elm, void (*freeit)(void *data)) FAST_FUNC;
912 llist_t *llist_rev(llist_t *list) FAST_FUNC;
913 llist_t *llist_find_str(llist_t *first, const char *str) FAST_FUNC;
914 /* BTW, surprisingly, changing API to
915 * llist_t *llist_add_to(llist_t *old_head, void *data)
916 * etc does not result in smaller code... */
918 /* start_stop_daemon and udhcpc are special - they want
919 * to create pidfiles regardless of FEATURE_PIDFILE */
920 #if ENABLE_FEATURE_PIDFILE || defined(WANT_PIDFILE)
921 /* True only if we created pidfile which is *file*, not /dev/null etc */
922 extern smallint wrote_pidfile;
923 void write_pidfile(const char *path) FAST_FUNC;
924 #define remove_pidfile(path) do { if (wrote_pidfile) unlink(path); } while (0)
926 enum { wrote_pidfile = 0 };
927 #define write_pidfile(path) ((void)0)
928 #define remove_pidfile(path) ((void)0)
933 LOGMODE_STDIO = (1 << 0),
934 LOGMODE_SYSLOG = (1 << 1) * ENABLE_FEATURE_SYSLOG,
935 LOGMODE_BOTH = LOGMODE_SYSLOG + LOGMODE_STDIO,
937 extern const char *msg_eol;
938 extern smallint logmode;
939 extern int die_sleep;
940 extern int xfunc_error_retval;
941 extern jmp_buf die_jmp;
942 extern void xfunc_die(void) NORETURN FAST_FUNC;
943 extern void bb_show_usage(void) NORETURN FAST_FUNC;
944 extern void bb_error_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
945 extern void bb_error_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
946 extern void bb_perror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
947 extern void bb_simple_perror_msg(const char *s) FAST_FUNC;
948 extern void bb_perror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
949 extern void bb_simple_perror_msg_and_die(const char *s) NORETURN FAST_FUNC;
950 extern void bb_herror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
951 extern void bb_herror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
952 extern void bb_perror_nomsg_and_die(void) NORETURN FAST_FUNC;
953 extern void bb_perror_nomsg(void) FAST_FUNC;
954 extern void bb_info_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
955 extern void bb_verror_msg(const char *s, va_list p, const char *strerr) FAST_FUNC;
957 /* We need to export XXX_main from libbusybox
958 * only if we build "individual" binaries
960 #if ENABLE_FEATURE_INDIVIDUAL
961 #define MAIN_EXTERNALLY_VISIBLE EXTERNALLY_VISIBLE
963 #define MAIN_EXTERNALLY_VISIBLE
967 /* Applets which are useful from another applets */
968 int bb_cat(char** argv);
969 /* If shell needs them, they exist even if not enabled as applets */
970 int echo_main(int argc, char** argv) IF_ECHO(MAIN_EXTERNALLY_VISIBLE);
971 int printf_main(int argc, char **argv) IF_PRINTF(MAIN_EXTERNALLY_VISIBLE);
972 int test_main(int argc, char **argv) IF_TEST(MAIN_EXTERNALLY_VISIBLE);
973 int kill_main(int argc, char **argv) IF_KILL(MAIN_EXTERNALLY_VISIBLE);
974 /* Similar, but used by chgrp, not shell */
975 int chown_main(int argc, char **argv) IF_CHOWN(MAIN_EXTERNALLY_VISIBLE);
977 int ls_main(int argc, char **argv) IF_LS(MAIN_EXTERNALLY_VISIBLE);
978 /* Don't need IF_xxx() guard for these */
979 int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
980 int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
983 void bb_displayroutes(int noresolve, int netstatfmt) FAST_FUNC;
988 int create_icmp_socket(void) FAST_FUNC;
989 int create_icmp6_socket(void) FAST_FUNC;
991 /* This structure defines protocol families and their handlers. */
997 char* FAST_FUNC (*print)(unsigned char *);
998 const char* FAST_FUNC (*sprint)(struct sockaddr *, int numeric);
999 int FAST_FUNC (*input)(/*int type,*/ const char *bufp, struct sockaddr *);
1000 void FAST_FUNC (*herror)(char *text);
1001 int FAST_FUNC (*rprint)(int options);
1002 int FAST_FUNC (*rinput)(int typ, int ext, char **argv);
1003 /* may modify src */
1004 int FAST_FUNC (*getmask)(char *src, struct sockaddr *mask, char *name);
1006 /* This structure defines hardware protocols and their handlers. */
1012 char* FAST_FUNC (*print)(unsigned char *);
1013 int FAST_FUNC (*input)(const char *, struct sockaddr *);
1014 int FAST_FUNC (*activate)(int fd);
1015 int suppress_null_addr;
1017 extern smallint interface_opt_a;
1018 int display_interfaces(char *ifname) FAST_FUNC;
1019 #if ENABLE_FEATURE_HWIB
1020 int in_ib(const char *bufp, struct sockaddr *sap) FAST_FUNC;
1022 #define in_ib(a, b) 1 /* fail */
1024 const struct aftype *get_aftype(const char *name) FAST_FUNC;
1025 const struct hwtype *get_hwtype(const char *name) FAST_FUNC;
1026 const struct hwtype *get_hwntype(int type) FAST_FUNC;
1029 #ifndef BUILD_INDIVIDUAL
1030 extern int find_applet_by_name(const char *name) FAST_FUNC;
1031 /* Returns only if applet is not found. */
1032 extern void run_applet_and_exit(const char *name, char **argv) FAST_FUNC;
1033 extern void run_applet_no_and_exit(int a, char **argv) NORETURN FAST_FUNC;
1036 #ifdef HAVE_MNTENT_H
1037 extern int match_fstype(const struct mntent *mt, const char *fstypes) FAST_FUNC;
1038 extern struct mntent *find_mount_point(const char *name, int subdir_too) FAST_FUNC;
1040 extern void erase_mtab(const char * name) FAST_FUNC;
1041 extern unsigned int tty_baud_to_value(speed_t speed) FAST_FUNC;
1042 extern speed_t tty_value_to_baud(unsigned int value) FAST_FUNC;
1044 extern void bb_warn_ignoring_args(char *arg) FAST_FUNC;
1046 # define bb_warn_ignoring_args(arg) ((void)0)
1049 extern int get_linux_version_code(void) FAST_FUNC;
1051 extern char *query_loop(const char *device) FAST_FUNC;
1052 extern int del_loop(const char *device) FAST_FUNC;
1053 /* If *devname is not NULL, use that name, otherwise try to find free one,
1054 * malloc and return it in *devname.
1055 * return value: 1: read-only loopdev was setup, 0: rw, < 0: error */
1056 extern int set_loop(char **devname, const char *file, unsigned long long offset) FAST_FUNC;
1058 /* Like bb_ask below, but asks on stdin with no timeout. */
1059 char *bb_ask_stdin(const char * prompt) FAST_FUNC;
1060 //TODO: pass buf pointer or return allocated buf (avoid statics)?
1061 char *bb_ask(const int fd, int timeout, const char * prompt) FAST_FUNC;
1062 int bb_ask_confirmation(void) FAST_FUNC;
1064 int bb_parse_mode(const char* s, mode_t* theMode) FAST_FUNC;
1067 * Config file parser
1070 PARSE_COLLAPSE = 0x00010000, // treat consecutive delimiters as one
1071 PARSE_TRIM = 0x00020000, // trim leading and trailing delimiters
1072 // TODO: COLLAPSE and TRIM seem to always go in pair
1073 PARSE_GREEDY = 0x00040000, // last token takes entire remainder of the line
1074 PARSE_MIN_DIE = 0x00100000, // die if < min tokens found
1075 // keep a copy of current line
1076 PARSE_KEEP_COPY = 0x00200000 * ENABLE_FEATURE_CROND_D,
1077 // PARSE_ESCAPE = 0x00400000, // process escape sequences in tokens
1079 // * remove leading and trailing delimiters and collapse
1080 // multiple delimiters into one
1081 // * warn and continue if less than mintokens delimiters found
1082 // * grab everything into last token
1083 PARSE_NORMAL = PARSE_COLLAPSE | PARSE_TRIM | PARSE_GREEDY,
1085 typedef struct parser_t {
1091 parser_t* config_open(const char *filename) FAST_FUNC;
1092 parser_t* config_open2(const char *filename, FILE* FAST_FUNC (*fopen_func)(const char *path)) FAST_FUNC;
1093 int config_read(parser_t *parser, char **tokens, unsigned flags, const char *delims) FAST_FUNC;
1094 #define config_read(parser, tokens, max, min, str, flags) \
1095 config_read(parser, tokens, ((flags) | (((min) & 0xFF) << 8) | ((max) & 0xFF)), str)
1096 void config_close(parser_t *parser) FAST_FUNC;
1098 /* Concatenate path and filename to new allocated buffer.
1099 * Add "/" only as needed (no duplicate "//" are produced).
1100 * If path is NULL, it is assumed to be "/".
1101 * filename should not be NULL. */
1102 char *concat_path_file(const char *path, const char *filename) FAST_FUNC;
1103 char *concat_subpath_file(const char *path, const char *filename) FAST_FUNC;
1104 const char *bb_basename(const char *name) FAST_FUNC;
1105 /* NB: can violate const-ness (similarly to strchr) */
1106 char *last_char_is(const char *s, int c) FAST_FUNC;
1109 int bb_make_directory(char *path, long mode, int flags) FAST_FUNC;
1111 int get_signum(const char *name) FAST_FUNC;
1112 const char *get_signame(int number) FAST_FUNC;
1113 void print_signames(void) FAST_FUNC;
1115 char *bb_simplify_path(const char *path) FAST_FUNC;
1116 /* Returns ptr to NUL */
1117 char *bb_simplify_abs_path_inplace(char *path) FAST_FUNC;
1119 #define FAIL_DELAY 3
1120 extern void bb_do_delay(int seconds) FAST_FUNC;
1121 extern void change_identity(const struct passwd *pw) FAST_FUNC;
1122 extern void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) NORETURN FAST_FUNC;
1123 extern void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) FAST_FUNC;
1125 extern void renew_current_security_context(void) FAST_FUNC;
1126 extern void set_current_security_context(security_context_t sid) FAST_FUNC;
1127 extern context_t set_security_context_component(security_context_t cur_context,
1128 char *user, char *role, char *type, char *range) FAST_FUNC;
1129 extern void setfscreatecon_or_die(security_context_t scontext) FAST_FUNC;
1130 extern void selinux_preserve_fcontext(int fdesc) FAST_FUNC;
1132 #define selinux_preserve_fcontext(fdesc) ((void)0)
1134 extern void selinux_or_die(void) FAST_FUNC;
1135 extern int restricted_shell(const char *shell) FAST_FUNC;
1137 /* setup_environment:
1138 * if clear_env = 1: cd(pw->pw_dir), clear environment, then set
1140 * USER=pw->pw_name, LOGNAME=pw->pw_name
1141 * PATH=bb_default_[root_]path
1144 * else if change_env = 1:
1145 * if not root (if pw->pw_uid != 0):
1146 * USER=pw->pw_name, LOGNAME=pw->pw_name
1151 extern void setup_environment(const char *shell, int clear_env, int change_env, const struct passwd *pw) FAST_FUNC;
1152 extern int correct_password(const struct passwd *pw) FAST_FUNC;
1153 /* Returns a malloced string */
1154 #if !ENABLE_USE_BB_CRYPT
1155 #define pw_encrypt(clear, salt, cleanup) pw_encrypt(clear, salt)
1157 extern char *pw_encrypt(const char *clear, const char *salt, int cleanup) FAST_FUNC;
1158 extern int obscure(const char *old, const char *newval, const struct passwd *pwdp) FAST_FUNC;
1159 /* rnd is additional random input. New one is returned.
1160 * Useful if you call crypt_make_salt many times in a row:
1161 * rnd = crypt_make_salt(buf1, 4, 0);
1162 * rnd = crypt_make_salt(buf2, 4, rnd);
1163 * rnd = crypt_make_salt(buf3, 4, rnd);
1164 * (otherwise we risk having same salt generated)
1166 extern int crypt_make_salt(char *p, int cnt, int rnd) FAST_FUNC;
1168 /* Returns number of lines changed, or -1 on error */
1169 #if !(ENABLE_FEATURE_ADDUSER_TO_GROUP || ENABLE_FEATURE_DEL_USER_FROM_GROUP)
1170 #define update_passwd(filename, username, data, member) \
1171 update_passwd(filename, username, data)
1173 extern int update_passwd(const char *filename,
1174 const char *username,
1176 const char *member) FAST_FUNC;
1178 int index_in_str_array(const char *const string_array[], const char *key) FAST_FUNC;
1179 int index_in_strings(const char *strings, const char *key) FAST_FUNC;
1180 int index_in_substr_array(const char *const string_array[], const char *key) FAST_FUNC;
1181 int index_in_substrings(const char *strings, const char *key) FAST_FUNC;
1182 const char *nth_string(const char *strings, int n) FAST_FUNC;
1184 extern void print_login_issue(const char *issue_file, const char *tty) FAST_FUNC;
1185 extern void print_login_prompt(void) FAST_FUNC;
1187 char *xmalloc_ttyname(int fd) FAST_FUNC RETURNS_MALLOC;
1188 /* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */
1189 int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FUNC;
1191 int tcsetattr_stdin_TCSANOW(const struct termios *tp) FAST_FUNC;
1193 /* NB: "unsigned request" is crucial! "int request" will break some arches! */
1194 int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
1195 int ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
1196 #if ENABLE_IOCTL_HEX2STR_ERROR
1197 int bb_ioctl_or_warn(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
1198 int bb_xioctl(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
1199 #define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp,#request)
1200 #define xioctl(fd,request,argp) bb_xioctl(fd,request,argp,#request)
1202 int bb_ioctl_or_warn(int fd, unsigned request, void *argp) FAST_FUNC;
1203 int bb_xioctl(int fd, unsigned request, void *argp) FAST_FUNC;
1204 #define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp)
1205 #define xioctl(fd,request,argp) bb_xioctl(fd,request,argp)
1208 char *is_in_ino_dev_hashtable(const struct stat *statbuf) FAST_FUNC;
1209 void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name) FAST_FUNC;
1210 void reset_ino_dev_hashtable(void) FAST_FUNC;
1212 /* At least glibc has horrendously large inline for this, so wrap it */
1213 unsigned long long bb_makedev(unsigned int major, unsigned int minor) FAST_FUNC;
1215 #define makedev(a,b) bb_makedev(a,b)
1219 /* "Keycodes" that report an escape sequence.
1220 * We use something which fits into signed char,
1221 * yet doesn't represent any valid Unicode character.
1222 * Also, -1 is reserved for error indication and we don't use it. */
1230 KEYCODE_INSERT = -8,
1231 KEYCODE_DELETE = -9,
1232 KEYCODE_PAGEUP = -10,
1233 KEYCODE_PAGEDOWN = -11,
1235 KEYCODE_CTRL_UP = KEYCODE_UP & ~0x40,
1236 KEYCODE_CTRL_DOWN = KEYCODE_DOWN & ~0x40,
1237 KEYCODE_CTRL_RIGHT = KEYCODE_RIGHT & ~0x40,
1238 KEYCODE_CTRL_LEFT = KEYCODE_LEFT & ~0x40,
1249 KEYCODE_FUN10 = -21,
1250 KEYCODE_FUN11 = -22,
1251 KEYCODE_FUN12 = -23,
1253 KEYCODE_CURSOR_POS = -0x100, /* 0xfff..fff00 */
1254 /* How long is the longest ESC sequence we know?
1255 * We want it big enough to be able to contain
1256 * cursor position sequence "ESC [ 9999 ; 9999 R"
1258 KEYCODE_BUFFER_SIZE = 16
1260 /* Note: fd may be in blocking or non-blocking mode, both make sense.
1261 * For one, less uses non-blocking mode.
1262 * Only the first read syscall inside read_key may block indefinitely
1263 * (unless fd is in non-blocking mode),
1264 * subsequent reads will time out after a few milliseconds.
1265 * Return of -1 means EOF or error (errno == 0 on EOF).
1266 * buffer[0] is used as a counter of buffered chars and must be 0
1269 int64_t read_key(int fd, char *buffer) FAST_FUNC;
1272 #if ENABLE_FEATURE_EDITING
1273 /* It's NOT just ENABLEd or disabled. It's a number: */
1274 # ifdef CONFIG_FEATURE_EDITING_HISTORY
1275 # define MAX_HISTORY (CONFIG_FEATURE_EDITING_HISTORY + 0)
1277 # define MAX_HISTORY 0
1279 typedef struct line_input_t {
1281 const char *path_lookup;
1285 # if ENABLE_FEATURE_EDITING_SAVEHISTORY
1286 unsigned cnt_history_in_file;
1287 const char *hist_file;
1289 char *history[MAX_HISTORY + 1];
1293 DO_HISTORY = 1 * (MAX_HISTORY > 0),
1294 SAVE_HISTORY = 2 * (MAX_HISTORY > 0) * ENABLE_FEATURE_EDITING_SAVEHISTORY,
1295 TAB_COMPLETION = 4 * ENABLE_FEATURE_TAB_COMPLETION,
1296 USERNAME_COMPLETION = 8 * ENABLE_FEATURE_USERNAME_COMPLETION,
1297 VI_MODE = 0x10 * ENABLE_FEATURE_EDITING_VI,
1298 WITH_PATH_LOOKUP = 0x20,
1299 FOR_SHELL = DO_HISTORY | SAVE_HISTORY | TAB_COMPLETION | USERNAME_COMPLETION,
1301 line_input_t *new_line_input_t(int flags) FAST_FUNC;
1302 /* So far static: void free_line_input_t(line_input_t *n) FAST_FUNC; */
1303 /* maxsize must be >= 2.
1305 * -1 on read errors or EOF, or on bare Ctrl-D,
1306 * 0 on ctrl-C (the line entered is still returned in 'command'),
1307 * >0 length of input string, including terminating '\n'
1309 int read_line_input(const char* prompt, char* command, int maxsize, line_input_t *state) FAST_FUNC;
1311 #define MAX_HISTORY 0
1312 int read_line_input(const char* prompt, char* command, int maxsize) FAST_FUNC;
1313 #define read_line_input(prompt, command, maxsize, state) \
1314 read_line_input(prompt, command, maxsize)
1319 # ifdef TASK_COMM_LEN
1320 enum { COMM_LEN = TASK_COMM_LEN };
1322 /* synchronize with sizeof(task_struct.comm) in /usr/include/linux/sched.h */
1323 enum { COMM_LEN = 16 };
1326 typedef struct procps_status_t {
1328 IF_FEATURE_SHOW_THREADS(DIR *task_dir;)
1329 uint8_t shift_pages_to_bytes;
1330 uint8_t shift_pages_to_kb;
1331 /* Fields are set to 0/NULL if failed to determine (or not requested) */
1335 IF_SELINUX(char *context;)
1336 /* Everything below must contain no ptrs to malloc'ed data:
1337 * it is memset(0) for each process in procps_scan() */
1338 unsigned long vsz, rss; /* we round it to kbytes */
1339 unsigned long stime, utime;
1340 unsigned long start_time;
1347 #if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
1352 unsigned tty_major,tty_minor;
1353 #if ENABLE_FEATURE_TOPMEM
1354 unsigned long mapped_rw;
1355 unsigned long mapped_ro;
1356 unsigned long shared_clean;
1357 unsigned long shared_dirty;
1358 unsigned long private_clean;
1359 unsigned long private_dirty;
1360 unsigned long stack;
1363 /* basename of executable in exec(2), read from /proc/N/stat
1364 * (if executable is symlink or script, it is NOT replaced
1365 * by link target or interpreter name) */
1366 char comm[COMM_LEN];
1367 /* user/group? - use passwd/group parsing functions */
1368 #if ENABLE_FEATURE_TOP_SMP_PROCESS
1369 int last_seen_on_cpu;
1372 /* flag bits for procps_scan(xx, flags) calls */
1374 PSSCAN_PID = 1 << 0,
1375 PSSCAN_PPID = 1 << 1,
1376 PSSCAN_PGID = 1 << 2,
1377 PSSCAN_SID = 1 << 3,
1378 PSSCAN_UIDGID = 1 << 4,
1379 PSSCAN_COMM = 1 << 5,
1380 /* PSSCAN_CMD = 1 << 6, - use read_cmdline instead */
1381 PSSCAN_ARGV0 = 1 << 7,
1382 PSSCAN_EXE = 1 << 8,
1383 PSSCAN_STATE = 1 << 9,
1384 PSSCAN_VSZ = 1 << 10,
1385 PSSCAN_RSS = 1 << 11,
1386 PSSCAN_STIME = 1 << 12,
1387 PSSCAN_UTIME = 1 << 13,
1388 PSSCAN_TTY = 1 << 14,
1389 PSSCAN_SMAPS = (1 << 15) * ENABLE_FEATURE_TOPMEM,
1390 /* NB: used by find_pid_by_name(). Any applet using it
1391 * needs to be mentioned here. */
1392 PSSCAN_ARGVN = (1 << 16) * (ENABLE_KILLALL
1393 || ENABLE_PGREP || ENABLE_PKILL
1397 PSSCAN_CONTEXT = (1 << 17) * ENABLE_SELINUX,
1398 PSSCAN_START_TIME = 1 << 18,
1399 PSSCAN_CPU = (1 << 19) * ENABLE_FEATURE_TOP_SMP_PROCESS,
1400 PSSCAN_NICE = (1 << 20) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
1401 PSSCAN_RUIDGID = (1 << 21) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
1402 PSSCAN_TASKS = (1 << 22) * ENABLE_FEATURE_SHOW_THREADS,
1403 /* These are all retrieved from proc/NN/stat in one go: */
1404 PSSCAN_STAT = PSSCAN_PPID | PSSCAN_PGID | PSSCAN_SID
1405 /**/ | PSSCAN_COMM | PSSCAN_STATE
1406 /**/ | PSSCAN_VSZ | PSSCAN_RSS
1407 /**/ | PSSCAN_STIME | PSSCAN_UTIME | PSSCAN_START_TIME
1408 /**/ | PSSCAN_TTY | PSSCAN_NICE
1411 //procps_status_t* alloc_procps_scan(void) FAST_FUNC;
1412 void free_procps_scan(procps_status_t* sp) FAST_FUNC;
1413 procps_status_t* procps_scan(procps_status_t* sp, int flags) FAST_FUNC;
1414 /* Format cmdline (up to col chars) into char buf[size] */
1415 /* Puts [comm] if cmdline is empty (-> process is a kernel thread) */
1416 void read_cmdline(char *buf, int size, unsigned pid, const char *comm) FAST_FUNC;
1417 pid_t *find_pid_by_name(const char* procName) FAST_FUNC;
1418 pid_t *pidlist_reverse(pid_t *pidList) FAST_FUNC;
1421 extern const char bb_uuenc_tbl_base64[];
1422 extern const char bb_uuenc_tbl_std[];
1423 void bb_uuencode(char *store, const void *s, int length, const char *tbl) FAST_FUNC;
1425 typedef struct sha1_ctx_t {
1426 uint32_t hash[8]; /* 5, +3 elements for sha256 */
1428 uint8_t wbuffer[64]; /* NB: always correctly aligned for uint64_t */
1429 void (*process_block)(struct sha1_ctx_t*) FAST_FUNC;
1431 void sha1_begin(sha1_ctx_t *ctx) FAST_FUNC;
1432 void sha1_hash(const void *data, size_t length, sha1_ctx_t *ctx) FAST_FUNC;
1433 void sha1_end(void *resbuf, sha1_ctx_t *ctx) FAST_FUNC;
1434 typedef struct sha1_ctx_t sha256_ctx_t;
1435 void sha256_begin(sha256_ctx_t *ctx) FAST_FUNC;
1436 #define sha256_hash sha1_hash
1437 #define sha256_end sha1_end
1438 typedef struct sha512_ctx_t {
1440 uint64_t total64[2];
1441 uint8_t wbuffer[128]; /* NB: always correctly aligned for uint64_t */
1443 void sha512_begin(sha512_ctx_t *ctx) FAST_FUNC;
1444 void sha512_hash(const void *buffer, size_t len, sha512_ctx_t *ctx) FAST_FUNC;
1445 void sha512_end(void *resbuf, sha512_ctx_t *ctx) FAST_FUNC;
1447 typedef struct md5_ctx_t {
1457 /* libbb/md5prime.c uses a bit different one: */
1458 typedef struct md5_ctx_t {
1459 uint32_t state[4]; /* state (ABCD) */
1460 uint32_t count[2]; /* number of bits, modulo 2^64 (lsb first) */
1461 unsigned char buffer[64]; /* input buffer */
1464 void md5_begin(md5_ctx_t *ctx) FAST_FUNC;
1465 void md5_hash(const void *data, size_t length, md5_ctx_t *ctx) FAST_FUNC;
1466 void md5_end(void *resbuf, md5_ctx_t *ctx) FAST_FUNC;
1469 uint32_t *crc32_filltable(uint32_t *tbl256, int endian) FAST_FUNC;
1471 typedef struct masks_labels_t {
1475 int print_flags_separated(const int *masks, const char *labels,
1476 int flags, const char *separator) FAST_FUNC;
1477 int print_flags(const masks_labels_t *ml, int flags) FAST_FUNC;
1479 typedef struct bb_progress_t {
1481 unsigned lastupdate_sec;
1485 void bb_progress_init(bb_progress_t *p) FAST_FUNC;
1486 void bb_progress_update(bb_progress_t *p, const char *curfile,
1487 off_t beg_range, off_t transferred,
1488 off_t totalsize) FAST_FUNC;
1490 extern const char *applet_name;
1491 /* "BusyBox vN.N.N (timestamp or extra_version)" */
1492 extern const char bb_banner[];
1493 extern const char bb_msg_memory_exhausted[];
1494 extern const char bb_msg_invalid_date[];
1495 extern const char bb_msg_read_error[];
1496 extern const char bb_msg_write_error[];
1497 extern const char bb_msg_unknown[];
1498 extern const char bb_msg_can_not_create_raw_socket[];
1499 extern const char bb_msg_perm_denied_are_you_root[];
1500 extern const char bb_msg_you_must_be_root[];
1501 extern const char bb_msg_requires_arg[];
1502 extern const char bb_msg_invalid_arg[];
1503 extern const char bb_msg_standard_input[];
1504 extern const char bb_msg_standard_output[];
1506 extern const char bb_str_default[];
1507 /* NB: (bb_hexdigits_upcase[i] | 0x20) -> lowercase hex digit */
1508 extern const char bb_hexdigits_upcase[];
1510 extern const char bb_path_mtab_file[];
1511 extern const char bb_path_passwd_file[];
1512 extern const char bb_path_shadow_file[];
1513 extern const char bb_path_gshadow_file[];
1514 extern const char bb_path_group_file[];
1515 extern const char bb_path_motd_file[];
1516 extern const char bb_path_wtmp_file[];
1517 extern const char bb_dev_null[];
1518 extern const char bb_busybox_exec_path[];
1519 /* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin,
1520 * but I want to save a few bytes here */
1521 extern const char bb_PATH_root_path[]; /* "PATH=/sbin:/usr/sbin:/bin:/usr/bin" */
1522 #define bb_default_root_path (bb_PATH_root_path + sizeof("PATH"))
1523 #define bb_default_path (bb_PATH_root_path + sizeof("PATH=/sbin:/usr/sbin"))
1525 extern const int const_int_0;
1526 extern const int const_int_1;
1529 /* Providing hard guarantee on minimum size (think of BUFSIZ == 128) */
1530 enum { COMMON_BUFSIZE = (BUFSIZ >= 256*sizeof(void*) ? BUFSIZ+1 : 256*sizeof(void*)) };
1531 extern char bb_common_bufsiz1[COMMON_BUFSIZE];
1532 /* This struct is deliberately not defined. */
1533 /* See docs/keep_data_small.txt */
1535 /* '*const' ptr makes gcc optimize code much better.
1536 * Magic prevents ptr_to_globals from going into rodata.
1537 * If you want to assign a value, use SET_PTR_TO_GLOBALS(x) */
1538 extern struct globals *const ptr_to_globals;
1539 /* At least gcc 3.4.6 on mipsel system needs optimization barrier */
1540 #define barrier() __asm__ __volatile__("":::"memory")
1541 #define SET_PTR_TO_GLOBALS(x) do { \
1542 (*(struct globals**)&ptr_to_globals) = (void*)(x); \
1546 /* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it,
1547 * use bb_default_login_shell and following defines.
1548 * If you change LIBBB_DEFAULT_LOGIN_SHELL,
1549 * don't forget to change increment constant. */
1550 #define LIBBB_DEFAULT_LOGIN_SHELL "-/bin/sh"
1551 extern const char bb_default_login_shell[];
1553 #define DEFAULT_SHELL (bb_default_login_shell+1)
1555 #define DEFAULT_SHELL_SHORT_NAME (bb_default_login_shell+6)
1557 #if ENABLE_FEATURE_DEVFS
1558 # define CURRENT_VC "/dev/vc/0"
1559 # define VC_1 "/dev/vc/1"
1560 # define VC_2 "/dev/vc/2"
1561 # define VC_3 "/dev/vc/3"
1562 # define VC_4 "/dev/vc/4"
1563 # define VC_5 "/dev/vc/5"
1564 #if defined(__sh__) || defined(__H8300H__) || defined(__H8300S__)
1565 /* Yes, this sucks, but both SH (including sh64) and H8 have a SCI(F) for their
1566 respective serial ports .. as such, we can't use the common device paths for
1568 # define SC_0 "/dev/ttsc/0"
1569 # define SC_1 "/dev/ttsc/1"
1570 # define SC_FORMAT "/dev/ttsc/%d"
1572 # define SC_0 "/dev/tts/0"
1573 # define SC_1 "/dev/tts/1"
1574 # define SC_FORMAT "/dev/tts/%d"
1576 # define VC_FORMAT "/dev/vc/%d"
1577 # define LOOP_FORMAT "/dev/loop/%d"
1578 # define LOOP_NAMESIZE (sizeof("/dev/loop/") + sizeof(int)*3 + 1)
1579 # define LOOP_NAME "/dev/loop/"
1580 # define FB_0 "/dev/fb/0"
1582 # define CURRENT_VC "/dev/tty0"
1583 # define VC_1 "/dev/tty1"
1584 # define VC_2 "/dev/tty2"
1585 # define VC_3 "/dev/tty3"
1586 # define VC_4 "/dev/tty4"
1587 # define VC_5 "/dev/tty5"
1588 #if defined(__sh__) || defined(__H8300H__) || defined(__H8300S__)
1589 # define SC_0 "/dev/ttySC0"
1590 # define SC_1 "/dev/ttySC1"
1591 # define SC_FORMAT "/dev/ttySC%d"
1593 # define SC_0 "/dev/ttyS0"
1594 # define SC_1 "/dev/ttyS1"
1595 # define SC_FORMAT "/dev/ttyS%d"
1597 # define VC_FORMAT "/dev/tty%d"
1598 # define LOOP_FORMAT "/dev/loop%d"
1599 # define LOOP_NAMESIZE (sizeof("/dev/loop") + sizeof(int)*3 + 1)
1600 # define LOOP_NAME "/dev/loop"
1601 # define FB_0 "/dev/fb0"
1604 /* The following devices are the same on devfs and non-devfs systems. */
1605 #define CURRENT_TTY "/dev/tty"
1606 #define DEV_CONSOLE "/dev/console"
1609 #define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0])))
1612 /* We redefine ctype macros. Unicode-correct handling of char types
1613 * can't be done with such byte-oriented operations anyway,
1614 * we don't lose anything.
1632 /* We save ~500 bytes on isdigit alone.
1633 * BTW, x86 likes (unsigned char) cast more than (unsigned). */
1635 /* These work the same for ASCII and Unicode,
1636 * assuming no one asks "is this a *Unicode* letter?" using isalpha(letter) */
1637 #define isascii(a) ((unsigned char)(a) <= 0x7f)
1638 #define isdigit(a) ((unsigned char)((a) - '0') <= 9)
1639 #define isupper(a) ((unsigned char)((a) - 'A') <= ('Z' - 'A'))
1640 #define islower(a) ((unsigned char)((a) - 'a') <= ('z' - 'a'))
1641 #define isalpha(a) ((unsigned char)(((a)|0x20) - 'a') <= ('z' - 'a'))
1642 #define isblank(a) ({ unsigned char bb__isblank = (a); bb__isblank == ' ' || bb__isblank == '\t'; })
1643 #define iscntrl(a) ({ unsigned char bb__iscntrl = (a); bb__iscntrl < ' ' || bb__iscntrl == 0x7f; })
1644 /* In POSIX/C locale isspace is only these chars: "\t\n\v\f\r" and space.
1645 * "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13.
1647 #define isspace(a) ({ unsigned char bb__isspace = (a) - 9; bb__isspace == (' ' - 9) || bb__isspace <= (13 - 9); })
1648 // Unsafe wrt NUL: #define ispunct(a) (strchr("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a)) != NULL)
1649 #define ispunct(a) (strchrnul("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a))[0])
1650 // Bigger code: #define isalnum(a) ({ unsigned char bb__isalnum = (a) - '0'; bb__isalnum <= 9 || ((bb__isalnum - ('A' - '0')) & 0xdf) <= 25; })
1651 #define isalnum(a) bb_ascii_isalnum(a)
1652 static ALWAYS_INLINE int bb_ascii_isalnum(unsigned char a)
1654 unsigned char b = a - '0';
1658 return b <= 'z' - 'a';
1660 #define isxdigit(a) bb_ascii_isxdigit(a)
1661 static ALWAYS_INLINE int bb_ascii_isxdigit(unsigned char a)
1663 unsigned char b = a - '0';
1667 return b <= 'f' - 'a';
1669 #define toupper(a) bb_ascii_toupper(a)
1670 static ALWAYS_INLINE unsigned char bb_ascii_toupper(unsigned char a)
1672 unsigned char b = a - 'a';
1673 if (b <= ('z' - 'a'))
1677 #define tolower(a) bb_ascii_tolower(a)
1678 static ALWAYS_INLINE unsigned char bb_ascii_tolower(unsigned char a)
1680 unsigned char b = a - 'A';
1681 if (b <= ('Z' - 'A'))
1686 /* In ASCII and Unicode, these are likely to be very different.
1687 * Let's prevent ambiguous usage from the start */
1688 #define isgraph(a) isgraph_is_ambiguous_dont_use(a)
1689 #define isprint(a) isprint_is_ambiguous_dont_use(a)
1690 /* NB: must not treat EOF as isgraph or isprint */
1691 #define isgraph_asciionly(a) ((unsigned)((a) - 0x21) <= 0x7e - 0x21)
1692 #define isprint_asciionly(a) ((unsigned)((a) - 0x20) <= 0x7e - 0x20)
1695 POP_SAVED_FUNCTION_VISIBILITY