1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) tons of folks. Tracking down who wrote what
6 * isn't something I'm going to worry about... If you wrote something
7 * here, please feel free to acknowledge your work.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
24 * Permission has been granted to redistribute this code under the GPL.
29 #if defined (BB_CHMOD_CHOWN_CHGRP) \
30 || defined (BB_CP_MV) \
31 || defined (BB_FIND) \
32 || defined (BB_INSMOD) \
36 /* same conditions as recursiveAction */
37 #define bb_need_name_too_long
39 #define bb_need_memory_exhausted
40 #define bb_need_full_version
41 #define BB_DECLARE_EXTERN
53 #include <sys/ioctl.h>
54 #include <sys/utsname.h> /* for uname(2) */
56 #if defined BB_FEATURE_MOUNT_LOOP
58 #include <linux/loop.h> /* Pull in loop device support */
61 /* Busybox mount uses either /proc/filesystems or /dev/mtab to get the
62 * list of available filesystems used for the -t auto option */
63 #if defined BB_FEATURE_USE_PROCFS && defined BB_FEATURE_USE_DEVPS_PATCH
64 //#error Sorry, but busybox can't use both /proc and /dev/ps at the same time -- Pick one and try again.
65 #error "Sorry, but busybox can't use both /proc and /dev/ps at the same time -- Pick one and try again."
69 #if defined BB_MOUNT || defined BB_UMOUNT || defined BB_DF
71 const char mtab_file[] = "/etc/mtab";
73 # if defined BB_FEATURE_USE_PROCFS
74 const char mtab_file[] = "/proc/mounts";
76 # if defined BB_FEATURE_USE_DEVPS_PATCH
77 const char mtab_file[] = "/dev/mtab";
79 # error With (BB_MOUNT||BB_UMOUNT||BB_DF) defined, you must define either BB_MTAB or ( BB_FEATURE_USE_PROCFS | BB_FEATURE_USE_DEVPS_PATCH)
85 extern void usage(const char *usage)
87 fprintf(stderr, "%s\n\n", full_version);
88 fprintf(stderr, "Usage: %s\n", usage);
92 extern void errorMsg(const char *s, ...)
98 fprintf(stderr, "%s: ", applet_name);
99 vfprintf(stderr, s, p);
104 extern void fatalError(const char *s, ...)
110 fprintf(stderr, "%s: ", applet_name);
111 vfprintf(stderr, s, p);
118 /* Returns kernel version encoded as major*65536 + minor*256 + patch,
119 * so, for example, to check if the kernel is greater than 2.2.11:
120 * if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> }
122 extern int get_kernel_revision(void)
125 int major = 0, minor = 0, patch = 0;
127 if (uname(&name) == -1) {
128 perror("cannot get system information");
131 sscanf(name.version, "%d.%d.%d", &major, &minor, &patch);
132 return major * 65536 + minor * 256 + patch;
138 #if defined BB_FREE || defined BB_INIT || defined BB_UNAME || defined BB_UPTIME
139 _syscall1(int, sysinfo, struct sysinfo *, info);
142 #if defined BB_MOUNT || defined BB_UMOUNT
145 #define __NR_umount2 52
148 /* Include our own version of <sys/mount.h>, since libc5 doesn't
149 * know about umount2 */
150 extern _syscall1(int, umount, const char *, special_file);
151 extern _syscall2(int, umount2, const char *, special_file, int, flags);
152 extern _syscall5(int, mount, const char *, special_file, const char *, dir,
153 const char *, fstype, unsigned long int, rwflag, const void *, data);
158 #if defined (BB_CP_MV) || defined (BB_DU)
160 #define HASH_SIZE 311 /* Should be prime */
161 #define hash_inode(i) ((i) % HASH_SIZE)
163 static ino_dev_hashtable_bucket_t *ino_dev_hashtable[HASH_SIZE];
166 * Return 1 if statbuf->st_ino && statbuf->st_dev are recorded in
167 * `ino_dev_hashtable', else return 0
169 * If NAME is a non-NULL pointer to a character pointer, and there is
170 * a match, then set *NAME to the value of the name slot in that
173 int is_in_ino_dev_hashtable(const struct stat *statbuf, char **name)
175 ino_dev_hashtable_bucket_t *bucket;
177 bucket = ino_dev_hashtable[hash_inode(statbuf->st_ino)];
178 while (bucket != NULL) {
179 if ((bucket->ino == statbuf->st_ino) &&
180 (bucket->dev == statbuf->st_dev))
182 if (name) *name = bucket->name;
185 bucket = bucket->next;
190 /* Add statbuf to statbuf hash table */
191 void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name)
195 ino_dev_hashtable_bucket_t *bucket;
197 i = hash_inode(statbuf->st_ino);
198 s = name ? strlen(name) : 0;
199 bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + s);
200 bucket->ino = statbuf->st_ino;
201 bucket->dev = statbuf->st_dev;
203 strcpy(bucket->name, name);
205 bucket->name[0] = '\0';
206 bucket->next = ino_dev_hashtable[i];
207 ino_dev_hashtable[i] = bucket;
210 /* Clear statbuf hash table */
211 void reset_ino_dev_hashtable(void)
214 ino_dev_hashtable_bucket_t *bucket;
216 for (i = 0; i < HASH_SIZE; i++) {
217 while (ino_dev_hashtable[i] != NULL) {
218 bucket = ino_dev_hashtable[i]->next;
219 free(ino_dev_hashtable[i]);
220 ino_dev_hashtable[i] = bucket;
225 #endif /* BB_CP_MV || BB_DU */
227 #if defined (BB_CP_MV) || defined (BB_DU) || defined (BB_LN) || defined (BB_AR)
229 * Return TRUE if a fileName is a directory.
230 * Nonexistant files return FALSE.
232 int isDirectory(const char *fileName, const int followLinks, struct stat *statBuf)
237 if (statBuf == NULL) {
238 statBuf = (struct stat *)xmalloc(sizeof(struct stat));
242 if (followLinks == TRUE)
243 status = stat(fileName, statBuf);
245 status = lstat(fileName, statBuf);
247 if (status < 0 || !(S_ISDIR(statBuf->st_mode))) {
260 #if defined (BB_CP_MV)
262 * Copy one file to another, while possibly preserving its modes, times, and
263 * modes. Returns TRUE if successful, or FALSE on a failure with an error
264 * message output. (Failure is not indicated if attributes cannot be set.)
268 copyFile(const char *srcName, const char *destName,
269 int setModes, int followLinks, int forceFlag)
276 struct stat srcStatBuf;
277 struct stat dstStatBuf;
278 struct utimbuf times;
280 if (followLinks == TRUE)
281 status = stat(srcName, &srcStatBuf);
283 status = lstat(srcName, &srcStatBuf);
290 if (followLinks == TRUE)
291 status = stat(destName, &dstStatBuf);
293 status = lstat(destName, &dstStatBuf);
295 if (status < 0 || forceFlag==TRUE) {
297 dstStatBuf.st_ino = -1;
298 dstStatBuf.st_dev = -1;
301 if ((srcStatBuf.st_dev == dstStatBuf.st_dev) &&
302 (srcStatBuf.st_ino == dstStatBuf.st_ino)) {
303 errorMsg("Copying file \"%s\" to itself\n", srcName);
307 if (S_ISDIR(srcStatBuf.st_mode)) {
308 //fprintf(stderr, "copying directory %s to %s\n", srcName, destName);
309 /* Make sure the directory is writable */
310 status = mkdir(destName, 0777777 ^ umask(0));
311 if (status < 0 && errno != EEXIST) {
315 } else if (S_ISLNK(srcStatBuf.st_mode)) {
316 char link_val[BUFSIZ + 1];
319 //fprintf(stderr, "copying link %s to %s\n", srcName, destName);
320 /* Warning: This could possibly truncate silently, to BUFSIZ chars */
321 link_size = readlink(srcName, &link_val[0], BUFSIZ);
326 link_val[link_size] = '\0';
327 status = symlink(link_val, destName);
332 #if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
333 if (setModes == TRUE) {
334 /* Try to set owner, but fail silently like GNU cp */
335 lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
339 } else if (S_ISFIFO(srcStatBuf.st_mode)) {
340 //fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
341 if (mkfifo(destName, 0644) < 0) {
345 } else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode)
346 || S_ISSOCK(srcStatBuf.st_mode)) {
347 //fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName);
348 if (mknod(destName, srcStatBuf.st_mode, srcStatBuf.st_rdev) < 0) {
352 } else if (S_ISREG(srcStatBuf.st_mode)) {
353 //fprintf(stderr, "copying regular file %s to %s\n", srcName, destName);
354 rfd = open(srcName, O_RDONLY);
361 open(destName, O_WRONLY | O_CREAT | O_TRUNC,
369 while ((rcc = read(rfd, buf, sizeof(buf))) > 0) {
370 if (fullWrite(wfd, buf, rcc) < 0)
378 if (close(wfd) < 0) {
383 if (setModes == TRUE) {
384 /* This is fine, since symlinks never get here */
385 if (chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid) < 0) {
389 if (chmod(destName, srcStatBuf.st_mode) < 0) {
393 times.actime = srcStatBuf.st_atime;
394 times.modtime = srcStatBuf.st_mtime;
395 if (utime(destName, ×) < 0) {
410 #endif /* BB_CP_MV */
414 #if defined BB_TAR || defined BB_LS
416 #define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
417 #define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
419 /* The special bits. If set, display SMODE0/1 instead of MODE0/1 */
420 static const mode_t SBIT[] = {
426 /* The 9 mode bits to test */
427 static const mode_t MBIT[] = {
428 S_IRUSR, S_IWUSR, S_IXUSR,
429 S_IRGRP, S_IWGRP, S_IXGRP,
430 S_IROTH, S_IWOTH, S_IXOTH
433 #define MODE1 "rwxrwxrwx"
434 #define MODE0 "---------"
435 #define SMODE1 "..s..s..t"
436 #define SMODE0 "..S..S..T"
439 * Return the standard ls-like mode string from a file mode.
440 * This is static and so is overwritten on each call.
442 const char *modeString(int mode)
448 buf[0] = TYPECHAR(mode);
449 for (i = 0; i < 9; i++) {
451 buf[i + 1] = (mode & MBIT[i]) ? SMODE1[i] : SMODE0[i];
453 buf[i + 1] = (mode & MBIT[i]) ? MODE1[i] : MODE0[i];
457 #endif /* BB_TAR || BB_LS */
460 #if defined BB_TAR || defined BB_AR
462 * Return the standard ls-like time string from a time_t
463 * This is static and so is overwritten on each call.
465 const char *timeString(time_t timeVal)
473 str = ctime(&timeVal);
475 strcpy(buf, &str[4]);
478 if ((timeVal > now) || (timeVal < now - 365 * 24 * 60 * 60L)) {
479 strcpy(&buf[7], &str[20]);
485 #endif /* BB_TAR || BB_AR */
487 #if defined BB_TAR || defined BB_CP_MV || defined BB_AR
489 * Write all of the supplied buffer out to a file.
490 * This does multiple writes as necessary.
491 * Returns the amount written, or -1 on an error.
493 int fullWrite(int fd, const char *buf, int len)
501 cc = write(fd, buf, len);
513 #endif /* BB_TAR || BB_CP_MV || BB_AR */
516 #if defined BB_TAR || defined BB_TAIL || defined BB_AR || defined BB_SH
518 * Read all of the supplied buffer from a file.
519 * This does multiple reads as necessary.
520 * Returns the amount read, or -1 on an error.
521 * A short read is returned on an end of file.
523 int fullRead(int fd, char *buf, int len)
531 cc = read(fd, buf, len);
546 #endif /* BB_TAR || BB_TAIL || BB_AR || BB_SH */
549 #if defined (BB_CHMOD_CHOWN_CHGRP) \
550 || defined (BB_CP_MV) \
551 || defined (BB_FIND) \
552 || defined (BB_INSMOD) \
558 * Walk down all the directories under the specified
559 * location, and do something (something specified
560 * by the fileAction and dirAction function pointers).
562 * Unfortunatly, while nftw(3) could replace this and reduce
563 * code size a bit, nftw() wasn't supported before GNU libc 2.1,
564 * and so isn't sufficiently portable to take over since glibc2.1
565 * is so stinking huge.
567 int recursiveAction(const char *fileName,
568 int recurse, int followLinks, int depthFirst,
569 int (*fileAction) (const char *fileName,
570 struct stat * statbuf,
572 int (*dirAction) (const char *fileName,
573 struct stat * statbuf,
581 if (followLinks == TRUE)
582 status = stat(fileName, &statbuf);
584 status = lstat(fileName, &statbuf);
587 #ifdef BB_DEBUG_PRINT_SCAFFOLD
589 "status=%d followLinks=%d TRUE=%d\n",
590 status, followLinks, TRUE);
596 if ((followLinks == FALSE) && (S_ISLNK(statbuf.st_mode))) {
597 if (fileAction == NULL)
600 return fileAction(fileName, &statbuf, userData);
603 if (recurse == FALSE) {
604 if (S_ISDIR(statbuf.st_mode)) {
605 if (dirAction != NULL)
606 return (dirAction(fileName, &statbuf, userData));
612 if (S_ISDIR(statbuf.st_mode)) {
615 dir = opendir(fileName);
620 if (dirAction != NULL && depthFirst == FALSE) {
621 status = dirAction(fileName, &statbuf, userData);
622 if (status == FALSE) {
627 while ((next = readdir(dir)) != NULL) {
628 char nextFile[BUFSIZ + 1];
630 if ((strcmp(next->d_name, "..") == 0)
631 || (strcmp(next->d_name, ".") == 0)) {
634 if (strlen(fileName) + strlen(next->d_name) + 1 > BUFSIZ) {
635 errorMsg(name_too_long);
638 memset(nextFile, 0, sizeof(nextFile));
639 sprintf(nextFile, "%s/%s", fileName, next->d_name);
641 recursiveAction(nextFile, TRUE, followLinks, depthFirst,
642 fileAction, dirAction, userData);
643 if (status == FALSE) {
648 status = closedir(dir);
653 if (dirAction != NULL && depthFirst == TRUE) {
654 status = dirAction(fileName, &statbuf, userData);
655 if (status == FALSE) {
661 if (fileAction == NULL)
664 return fileAction(fileName, &statbuf, userData);
669 #endif /* BB_CHMOD_CHOWN_CHGRP || BB_CP_MV || BB_FIND || BB_LS || BB_INSMOD */
673 #if defined (BB_TAR) || defined (BB_MKDIR) || defined (BB_AR)
675 * Attempt to create the directories along the specified path, except for
676 * the final component. The mode is given for the final directory only,
677 * while all previous ones get default protections. Errors are not reported
678 * here, as failures to restore files can be reported later.
680 extern int createPath(const char *name, int mode)
684 char buf[BUFSIZ + 1];
688 for (cp = buf; *cp == '/'; cp++);
689 cp = strchr(cp, '/');
692 cp = strchr(cp + 1, '/');
694 retVal = mkdir(buf, cp ? 0777 : mode);
695 if (retVal != 0 && errno != EEXIST) {
703 #endif /* BB_TAR || BB_MKDIR */
707 #if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_MKDIR) \
708 || defined (BB_MKFIFO) || defined (BB_MKNOD)
709 /* [ugoa]{+|-|=}[rwxst] */
713 extern int parse_mode(const char *s, mode_t * theMode)
717 S_ISVTX | S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
730 groups |= S_ISUID | S_IRWXU;
733 groups |= S_ISGID | S_IRWXG;
739 groups |= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
745 if (groups == 0) /* The default is "all" */
747 S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
750 if (isdigit(c) && c >= '0' && c <= '7' &&
751 mode == 0 && groups == 0) {
752 *theMode = strtol(--s, NULL, 8);
760 while ((c = *s++) != '\0') {
765 mode |= S_IRUSR | S_IRGRP | S_IROTH;
768 mode |= S_IWUSR | S_IWGRP | S_IWOTH;
771 mode |= S_IXUSR | S_IXGRP | S_IXOTH;
774 mode |= S_IXGRP | S_ISUID | S_ISGID;
788 andMode &= ~(groups);
791 orMode |= mode & groups;
794 andMode &= ~(mode & groups);
806 /* BB_CHMOD_CHOWN_CHGRP || BB_MKDIR || BB_MKFIFO || BB_MKNOD */
812 #if defined BB_CHMOD_CHOWN_CHGRP || defined BB_PS || defined BB_LS \
813 || defined BB_TAR || defined BB_ID || defined BB_LOGGER \
814 || defined BB_LOGNAME || defined BB_WHOAMI
816 /* This parses entries in /etc/passwd and /etc/group. This is desirable
817 * for BusyBox, since we want to avoid using the glibc NSS stuff, which
818 * increases target size and is often not needed or wanted for embedded
821 * /etc/passwd entries look like this:
822 * root:x:0:0:root:/root:/bin/bash
823 * and /etc/group entries look like this:
826 * This uses buf as storage to hold things.
829 unsigned long my_getid(const char *filename, char *name, long id, long *gid)
832 char *rname, *start, *end, buf[128];
836 file = fopen(filename, "r");
838 /* Do not complain. It is ok for /etc/passwd and
839 * friends to be missing... */
843 while (fgets(buf, 128, file) != NULL) {
847 /* username/group name */
849 end = strchr(start, ':');
857 end = strchr(start, ':');
861 /* uid in passwd, gid in group */
863 rid = (unsigned long) strtol(start, &end, 10);
869 rgid = (unsigned long) strtol(start, &end, 10);
872 if (0 == strcmp(rname, name)) {
873 if (gid) *gid = rgid;
878 if (id != -1 && id == rid) {
879 strncpy(name, rname, 8);
880 if (gid) *gid = rgid;
889 /* returns a uid given a username */
890 long my_getpwnam(char *name)
892 return my_getid("/etc/passwd", name, -1, NULL);
895 /* returns a gid given a group name */
896 long my_getgrnam(char *name)
898 return my_getid("/etc/group", name, -1, NULL);
901 /* gets a username given a uid */
902 void my_getpwuid(char *name, long uid)
904 my_getid("/etc/passwd", name, uid, NULL);
907 /* gets a groupname given a gid */
908 void my_getgrgid(char *group, long gid)
910 my_getid("/etc/group", group, gid, NULL);
913 /* gets a gid given a user name */
914 long my_getpwnamegid(char *name)
917 my_getid("/etc/passwd", name, -1, &gid);
922 /* BB_CHMOD_CHOWN_CHGRP || BB_PS || BB_LS || BB_TAR \
923 || BB_ID || BB_LOGGER || BB_LOGNAME || BB_WHOAMI */
926 #if (defined BB_CHVT) || (defined BB_DEALLOCVT) || (defined BB_SETKEYCODES)
928 /* From <linux/kd.h> */
929 #define KDGKBTYPE 0x4B33 /* get keyboard type */
931 #define KB_101 0x02 /* this is what we always answer */
933 int is_a_console(int fd)
938 return (ioctl(fd, KDGKBTYPE, &arg) == 0
939 && ((arg == KB_101) || (arg == KB_84)));
942 static int open_a_console(char *fnam)
947 fd = open(fnam, O_RDWR);
949 /* if failed, try read-only */
950 if (fd < 0 && errno == EACCES)
951 fd = open(fnam, O_RDONLY);
953 /* if failed, try write-only */
954 if (fd < 0 && errno == EACCES)
955 fd = open(fnam, O_WRONLY);
957 /* if failed, fail */
961 /* if not a console, fail */
962 if (!is_a_console(fd)) {
972 * Get an fd for use with kbd/console ioctls.
973 * We try several things because opening /dev/console will fail
974 * if someone else used X (which does a chown on /dev/console).
976 * if tty_name is non-NULL, try this one instead.
979 int get_console_fd(char *tty_name)
984 if (-1 == (fd = open_a_console(tty_name)))
990 fd = open_a_console("/dev/tty");
994 fd = open_a_console("/dev/tty0");
998 fd = open_a_console("/dev/console");
1002 for (fd = 0; fd < 3; fd++)
1003 if (is_a_console(fd))
1006 errorMsg("Couldnt get a file descriptor referring to the console\n");
1007 return -1; /* total failure */
1011 #endif /* BB_CHVT || BB_DEALLOCVT || BB_SETKEYCODES */
1014 #if !defined BB_REGEXP && (defined BB_GREP || defined BB_SED)
1016 /* Do a case insensitive strstr() */
1017 char *stristr(char *haystack, const char *needle)
1019 int len = strlen(needle);
1022 if (!strncasecmp(haystack, needle, len))
1033 /* This tries to find a needle in a haystack, but does so by
1034 * only trying to match literal strings (look 'ma, no regexps!)
1035 * This is short, sweet, and carries _very_ little baggage,
1036 * unlike its beefier cousin in regexp.c
1039 extern int find_match(char *haystack, char *needle, int ignoreCase)
1042 if (ignoreCase == FALSE)
1043 haystack = strstr(haystack, needle);
1045 haystack = stristr(haystack, needle);
1046 if (haystack == NULL)
1052 /* This performs substitutions after a string match has been found. */
1053 extern int replace_match(char *haystack, char *needle, char *newNeedle,
1057 char *where, *slider, *slider1, *oldhayStack;
1059 if (ignoreCase == FALSE)
1060 where = strstr(haystack, needle);
1062 where = stristr(haystack, needle);
1064 if (strcmp(needle, newNeedle) == 0)
1067 oldhayStack = (char *) xmalloc((unsigned) (strlen(haystack)));
1068 while (where != NULL) {
1070 strcpy(oldhayStack, haystack);
1071 for (slider = haystack, slider1 = oldhayStack; slider != where;
1072 slider++, slider1++);
1074 haystack = strcat(haystack, newNeedle);
1075 slider1 += strlen(needle);
1076 haystack = strcat(haystack, slider1);
1077 where = strstr(slider, needle);
1087 #endif /* ! BB_REGEXP && (BB_GREP || BB_SED) */
1090 #if defined BB_FIND || defined BB_INSMOD
1092 * Routine to see if a text string is matched by a wildcard pattern.
1093 * Returns TRUE if the text is matched, or FALSE if it is not matched
1094 * or if the pattern is invalid.
1095 * * matches zero or more characters
1096 * ? matches a single character
1097 * [abc] matches 'a', 'b' or 'c'
1098 * \c quotes character c
1099 * Adapted from code written by Ingo Wilken, and
1100 * then taken from sash, Copyright (c) 1999 by David I. Bell
1101 * Permission is granted to use, distribute, or modify this source,
1102 * provided that this copyright notice remains intact.
1103 * Permission to distribute this code under the GPL has been granted.
1105 extern int check_wildcard_match(const char *text, const char *pattern)
1107 const char *retryPat;
1108 const char *retryText;
1116 while (*text || *pattern) {
1128 while ((ch = *pattern++) != ']') {
1139 if (found == FALSE && len!=0) {
1142 if (found == TRUE) {
1143 if (strlen(pattern)==0 && len==1) {
1152 /* fall into next case */
1155 if (*text++ == '\0')
1166 /* fall into next case */
1184 if (pattern == NULL)
1190 #endif /* BB_FIND || BB_INSMOD */
1195 #if defined BB_DF || defined BB_MTAB
1197 * Given a block device, find the mount table entry if that block device
1200 * Given any other file (or directory), find the mount table entry for its
1203 extern struct mntent *findMountPoint(const char *name, const char *table)
1208 struct mntent *mountEntry;
1210 if (stat(name, &s) != 0)
1213 if ((s.st_mode & S_IFMT) == S_IFBLK)
1214 mountDevice = s.st_rdev;
1216 mountDevice = s.st_dev;
1219 if ((mountTable = setmntent(table, "r")) == 0)
1222 while ((mountEntry = getmntent(mountTable)) != 0) {
1223 if (strcmp(name, mountEntry->mnt_dir) == 0
1224 || strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */
1226 if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */
1228 if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */
1231 endmntent(mountTable);
1234 #endif /* BB_DF || BB_MTAB */
1238 #if defined BB_DD || defined BB_TAIL
1240 * Read a number with a possible multiplier.
1241 * Returns -1 if the number format is illegal.
1243 extern long getNum(const char *cp)
1247 if (!isDecimal(*cp))
1252 while (isDecimal(*cp))
1253 value = value * 10 + *cp++ - '0';
1257 case 'm': /* `tail' uses it traditionally */
1285 #endif /* BB_DD || BB_TAIL */
1288 #if defined BB_INIT || defined BB_SYSLOGD || defined BB_AR
1289 /* try to open up the specified device */
1290 extern int device_open(char *device, int mode)
1294 m = mode | O_NONBLOCK;
1296 /* Retry up to 5 times */
1297 for (f = 0; f < 5; f++)
1298 if ((fd = open(device, m, 0600)) >= 0)
1302 /* Reset original flags. */
1304 fcntl(fd, F_SETFL, mode);
1307 #endif /* BB_INIT BB_SYSLOGD */
1310 #if defined BB_KILLALL || ( defined BB_FEATURE_LINUXRC && ( defined BB_HALT || defined BB_REBOOT || defined BB_POWEROFF ))
1311 #ifdef BB_FEATURE_USE_DEVPS_PATCH
1312 #include <linux/devps.h> /* For Erik's nifty devps device driver */
1315 #if defined BB_FEATURE_USE_DEVPS_PATCH
1318 * This finds the pid of the specified process,
1319 * by using the /dev/ps device driver.
1321 * Returns a list of all matching PIDs
1323 extern pid_t* findPidByName( char* pidName)
1326 char device[] = "/dev/ps";
1328 pid_t* pid_array = NULL;
1329 pid_t* pidList=NULL;
1332 fd = open(device, O_RDONLY);
1334 fatalError( "open failed for `%s': %s\n", device, strerror (errno));
1336 /* Find out how many processes there are */
1337 if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0)
1338 fatalError( "\nDEVPS_GET_PID_LIST: %s\n", strerror (errno));
1340 /* Allocate some memory -- grab a few extras just in case
1341 * some new processes start up while we wait. The kernel will
1342 * just ignore any extras if we give it too many, and will trunc.
1343 * the list if we give it too few. */
1344 pid_array = (pid_t*) calloc( num_pids+10, sizeof(pid_t));
1345 pid_array[0] = num_pids+10;
1347 /* Now grab the pid list */
1348 if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0)
1349 fatalError( "\nDEVPS_GET_PID_LIST: %s\n", strerror (errno));
1351 /* Now search for a match */
1352 for (i=1, j=0; i<pid_array[0] ; i++) {
1354 struct pid_info info;
1356 info.pid = pid_array[i];
1357 if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0)
1358 fatalError( "\nDEVPS_GET_PID_INFO: %s\n", strerror (errno));
1360 /* Make sure we only match on the process name */
1361 p=info.command_line+1;
1362 while ((*p != 0) && !isspace(*(p)) && (*(p-1) != '\\')) {
1368 if ((strstr(info.command_line, pidName) != NULL)
1369 && (strlen(pidName) == strlen(info.command_line))) {
1370 pidList=realloc( pidList, sizeof(pid_t) * (j+2));
1372 fatalError(memory_exhausted);
1373 pidList[j++]=info.pid;
1383 if (close (fd) != 0)
1384 fatalError( "close failed for `%s': %s\n",device, strerror (errno));
1388 #else /* BB_FEATURE_USE_DEVPS_PATCH */
1389 #if ! defined BB_FEATURE_USE_PROCFS
1390 #error Sorry, I depend on the /proc filesystem right now.
1395 * This finds the pid of the specified process.
1396 * Currently, it's implemented by rummaging through
1397 * the proc filesystem.
1399 * Returns a list of all matching PIDs
1401 extern pid_t* findPidByName( char* pidName)
1404 struct dirent *next;
1405 pid_t* pidList=NULL;
1408 dir = opendir("/proc");
1410 fatalError( "Cannot open /proc: %s\n", strerror (errno));
1412 while ((next = readdir(dir)) != NULL) {
1418 /* If it isn't a number, we don't want it */
1419 if (!isdigit(*next->d_name))
1422 /* Now open the status file */
1423 sprintf(filename, "/proc/%s/status", next->d_name);
1424 status = fopen(filename, "r");
1428 fgets(buffer, 256, status);
1431 /* Make sure we only match on the process name */
1432 p=buffer+5; /* Skip the name */
1434 if (*p==0 || *p=='\n') {
1439 p=buffer+6; /* Skip the "Name:\t" */
1441 if ((strstr(p, pidName) != NULL)
1442 && (strlen(pidName) == strlen(p))) {
1443 pidList=realloc( pidList, sizeof(pid_t) * (i+2));
1445 fatalError(memory_exhausted);
1446 pidList[i++]=strtol(next->d_name, NULL, 0);
1453 #endif /* BB_FEATURE_USE_DEVPS_PATCH */
1454 #endif /* BB_KILLALL || ( BB_FEATURE_LINUXRC && ( BB_HALT || BB_REBOOT || BB_POWEROFF )) */
1457 /* this should really be farmed out to libbusybox.a */
1458 extern void *xmalloc(size_t size)
1460 void *ptr = malloc(size);
1463 fatalError(memory_exhausted);
1467 extern void *xrealloc(void *old, size_t size)
1469 void *ptr = realloc(old, size);
1471 fatalError(memory_exhausted);
1475 extern void *xcalloc(size_t nmemb, size_t size)
1477 void *ptr = calloc(nmemb, size);
1479 fatalError(memory_exhausted);
1484 #if defined BB_FEATURE_NFSMOUNT
1486 extern char * xstrdup (const char *s) {
1495 fatalError(memory_exhausted);
1501 extern char * xstrndup (const char *s, int n) {
1505 fatalError("xstrndup bug");
1516 #if (__GLIBC__ < 2) && (defined BB_SYSLOGD || defined BB_INIT)
1517 extern int vdprintf(int d, const char *format, va_list ap)
1522 len = vsprintf(buf, format, ap);
1523 return write(d, buf, len);
1525 #endif /* BB_SYSLOGD */
1527 #if defined BB_FEATURE_MOUNT_LOOP
1528 extern int del_loop(const char *device)
1532 if ((fd = open(device, O_RDONLY)) < 0) {
1536 if (ioctl(fd, LOOP_CLR_FD, 0) < 0) {
1537 perror("ioctl: LOOP_CLR_FD");
1544 extern int set_loop(const char *device, const char *file, int offset,
1547 struct loop_info loopinfo;
1550 mode = *loopro ? O_RDONLY : O_RDWR;
1551 if ((ffd = open(file, mode)) < 0 && !*loopro
1552 && (errno != EROFS || (ffd = open(file, mode = O_RDONLY)) < 0)) {
1556 if ((fd = open(device, mode)) < 0) {
1561 *loopro = (mode == O_RDONLY);
1563 memset(&loopinfo, 0, sizeof(loopinfo));
1564 strncpy(loopinfo.lo_name, file, LO_NAME_SIZE);
1565 loopinfo.lo_name[LO_NAME_SIZE - 1] = 0;
1567 loopinfo.lo_offset = offset;
1569 loopinfo.lo_encrypt_key_size = 0;
1570 if (ioctl(fd, LOOP_SET_FD, ffd) < 0) {
1571 perror("ioctl: LOOP_SET_FD");
1576 if (ioctl(fd, LOOP_SET_STATUS, &loopinfo) < 0) {
1577 (void) ioctl(fd, LOOP_CLR_FD, 0);
1578 perror("ioctl: LOOP_SET_STATUS");
1588 extern char *find_unused_loop_device(void)
1592 struct stat statbuf;
1593 struct loop_info loopinfo;
1595 for (i = 0; i <= 7; i++) {
1596 sprintf(dev, "/dev/loop%d", i);
1597 if (stat(dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) {
1598 if ((fd = open(dev, O_RDONLY)) >= 0) {
1599 if (ioctl(fd, LOOP_GET_STATUS, &loopinfo) == -1) {
1600 if (errno == ENXIO) { /* probably free */
1611 #endif /* BB_FEATURE_MOUNT_LOOP */
1613 #if defined BB_MOUNT || defined BB_DF || ( defined BB_UMOUNT && ! defined BB_MTAB)
1614 extern int find_real_root_device_name(char* name)
1617 struct dirent *entry;
1618 struct stat statBuf, rootStat;
1619 char fileName[BUFSIZ];
1621 if (stat("/", &rootStat) != 0) {
1622 errorMsg("could not stat '/'\n");
1626 dir = opendir("/dev");
1628 errorMsg("could not open '/dev'\n");
1632 while((entry = readdir(dir)) != NULL) {
1634 /* Must skip ".." since that is "/", and so we
1635 * would get a false positive on ".." */
1636 if (strcmp(entry->d_name, "..") == 0)
1639 snprintf( fileName, strlen(name)+1, "/dev/%s", entry->d_name);
1641 if (stat(fileName, &statBuf) != 0)
1643 /* Some char devices have the same dev_t as block
1644 * devices, so make sure this is a block device */
1645 if (! S_ISBLK(statBuf.st_mode))
1647 if (statBuf.st_rdev == rootStat.st_rdev) {
1648 strcpy(name, fileName);
1658 /* get_line_from_file() - This function reads an entire line from a text file
1659 * up to a newline. It returns a malloc'ed char * which must be stored and
1660 * free'ed by the caller. */
1661 extern char *get_line_from_file(FILE *file)
1663 static const int GROWBY = 80; /* how large we will grow strings by */
1667 char *linebuf = NULL;
1674 /* grow the line buffer as necessary */
1675 if (idx > linebufsz-2)
1676 linebuf = realloc(linebuf, linebufsz += GROWBY);
1677 linebuf[idx++] = (char)ch;
1678 if ((char)ch == '\n')
1689 #if defined BB_CAT || defined BB_LSMOD
1690 extern void print_file(FILE *file)
1694 while ((c = getc(file)) != EOF)
1700 extern int print_file_by_name(char *filename)
1703 file = fopen(filename, "r");
1710 #endif /* BB_CAT || BB_LSMOD */
1712 #if defined BB_ECHO || defined BB_TR
1713 char process_escape_sequence(char **ptr)
1717 switch (c = *(*ptr)++) {
1739 case '0': case '1': case '2': case '3':
1740 case '4': case '5': case '6': case '7':
1742 if ('0' <= **ptr && **ptr <= '7') {
1743 c = c * 8 + (*(*ptr)++ - '0');
1744 if ('0' <= **ptr && **ptr <= '7')
1745 c = c * 8 + (*(*ptr)++ - '0');
1757 #if defined BB_BASENAME || defined BB_LN
1758 char *get_last_path_component(char *path)
1760 char *s=path+strlen(path)-1;
1762 /* strip trailing slashes */
1763 while (s && *s == '/') {
1767 /* find last component */
1768 s = strrchr(path, '/');
1769 if (s==NULL) return path;
1774 #if defined BB_GREP || defined BB_SED
1775 void xregcomp(regex_t *preg, const char *regex, int cflags)
1778 if ((ret = regcomp(preg, regex, cflags)) != 0) {
1779 int errmsgsz = regerror(ret, preg, NULL, 0);
1780 char *errmsg = xmalloc(errmsgsz);
1781 regerror(ret, preg, errmsg, errmsgsz);
1782 fatalError("bb_regcomp: %s\n", errmsg);
1790 c-file-style: "linux"