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 recursive_action */
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 /* Busybox mount uses either /proc/filesystems or /dev/mtab to get the
57 * list of available filesystems used for the -t auto option */
58 #if defined BB_FEATURE_USE_PROCFS && defined BB_FEATURE_USE_DEVPS_PATCH
59 //#error Sorry, but busybox can't use both /proc and /dev/ps at the same time -- Pick one and try again.
60 #error "Sorry, but busybox can't use both /proc and /dev/ps at the same time -- Pick one and try again."
64 #if defined BB_MOUNT || defined BB_UMOUNT || defined BB_DF
66 const char mtab_file[] = "/etc/mtab";
68 # if defined BB_FEATURE_USE_PROCFS
69 const char mtab_file[] = "/proc/mounts";
71 # if defined BB_FEATURE_USE_DEVPS_PATCH
72 const char mtab_file[] = "/dev/mtab";
74 # 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)
80 extern void usage(const char *usage)
82 fprintf(stderr, "%s\n\n", full_version);
83 fprintf(stderr, "Usage: %s\n", usage);
87 static void verror_msg(const char *s, va_list p)
90 fprintf(stderr, "%s: ", applet_name);
91 vfprintf(stderr, s, p);
95 extern void error_msg(const char *s, ...)
104 extern void error_msg_and_die(const char *s, ...)
114 static void vperror_msg(const char *s, va_list p)
117 fprintf(stderr, "%s: ", applet_name);
119 vfprintf(stderr, s, p);
122 fprintf(stderr, "%s\n", strerror(errno));
126 extern void perror_msg(const char *s, ...)
135 extern void perror_msg_and_die(const char *s, ...)
146 /* Returns kernel version encoded as major*65536 + minor*256 + patch,
147 * so, for example, to check if the kernel is greater than 2.2.11:
148 * if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> }
150 extern int get_kernel_revision(void)
153 int major = 0, minor = 0, patch = 0;
155 if (uname(&name) == -1) {
156 perror("cannot get system information");
159 major = atoi(strtok(name.release, "."));
160 minor = atoi(strtok(NULL, "."));
161 patch = atoi(strtok(NULL, "."));
162 return major * 65536 + minor * 256 + patch;
168 #if defined BB_FREE || defined BB_INIT || defined BB_UNAME || defined BB_UPTIME
169 _syscall1(int, sysinfo, struct sysinfo *, info);
172 #if defined BB_MOUNT || defined BB_UMOUNT
175 #define __NR_umount2 52
178 /* Include our own version of <sys/mount.h>, since libc5 doesn't
179 * know about umount2 */
180 extern _syscall1(int, umount, const char *, special_file);
181 extern _syscall2(int, umount2, const char *, special_file, int, flags);
182 extern _syscall5(int, mount, const char *, special_file, const char *, dir,
183 const char *, fstype, unsigned long int, rwflag, const void *, data);
186 #if defined BB_INSMOD || defined BB_LSMOD
187 #ifndef __NR_query_module
188 #define __NR_query_module 167
190 _syscall5(int, query_module, const char *, name, int, which,
191 void *, buf, size_t, bufsize, size_t*, ret);
195 #if defined (BB_CP_MV) || defined (BB_DU)
197 #define HASH_SIZE 311 /* Should be prime */
198 #define hash_inode(i) ((i) % HASH_SIZE)
200 static ino_dev_hashtable_bucket_t *ino_dev_hashtable[HASH_SIZE];
203 * Return 1 if statbuf->st_ino && statbuf->st_dev are recorded in
204 * `ino_dev_hashtable', else return 0
206 * If NAME is a non-NULL pointer to a character pointer, and there is
207 * a match, then set *NAME to the value of the name slot in that
210 int is_in_ino_dev_hashtable(const struct stat *statbuf, char **name)
212 ino_dev_hashtable_bucket_t *bucket;
214 bucket = ino_dev_hashtable[hash_inode(statbuf->st_ino)];
215 while (bucket != NULL) {
216 if ((bucket->ino == statbuf->st_ino) &&
217 (bucket->dev == statbuf->st_dev))
219 if (name) *name = bucket->name;
222 bucket = bucket->next;
227 /* Add statbuf to statbuf hash table */
228 void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name)
232 ino_dev_hashtable_bucket_t *bucket;
234 i = hash_inode(statbuf->st_ino);
235 s = name ? strlen(name) : 0;
236 bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + s);
237 bucket->ino = statbuf->st_ino;
238 bucket->dev = statbuf->st_dev;
240 strcpy(bucket->name, name);
242 bucket->name[0] = '\0';
243 bucket->next = ino_dev_hashtable[i];
244 ino_dev_hashtable[i] = bucket;
247 /* Clear statbuf hash table */
248 void reset_ino_dev_hashtable(void)
251 ino_dev_hashtable_bucket_t *bucket;
253 for (i = 0; i < HASH_SIZE; i++) {
254 while (ino_dev_hashtable[i] != NULL) {
255 bucket = ino_dev_hashtable[i]->next;
256 free(ino_dev_hashtable[i]);
257 ino_dev_hashtable[i] = bucket;
262 #endif /* BB_CP_MV || BB_DU */
264 #if defined (BB_CP_MV) || defined (BB_DU) || defined (BB_LN) || defined (BB_AR)
266 * Return TRUE if a fileName is a directory.
267 * Nonexistant files return FALSE.
269 int is_directory(const char *fileName, const int followLinks, struct stat *statBuf)
274 if (statBuf == NULL) {
275 statBuf = (struct stat *)xmalloc(sizeof(struct stat));
279 if (followLinks == TRUE)
280 status = stat(fileName, statBuf);
282 status = lstat(fileName, statBuf);
284 if (status < 0 || !(S_ISDIR(statBuf->st_mode))) {
297 #if defined (BB_AR) || defined BB_CP_MV
299 * Copy chunksize bytes between two file descriptors
301 int copy_file_chunk(int srcfd, int dstfd, size_t chunksize)
304 char buffer[BUFSIZ]; /* BUFSIZ is declared in stdio.h */
306 while (chunksize > 0) {
307 if (chunksize > BUFSIZ)
311 if (full_write(dstfd, buffer, full_read(srcfd, buffer, size)) < size)
320 #if defined (BB_CP_MV)
322 * Copy one file to another, while possibly preserving its modes, times, and
323 * modes. Returns TRUE if successful, or FALSE on a failure with an error
324 * message output. (Failure is not indicated if attributes cannot be set.)
328 copy_file(const char *srcName, const char *destName,
329 int setModes, int followLinks, int forceFlag)
334 struct stat srcStatBuf;
335 struct stat dstStatBuf;
336 struct utimbuf times;
338 if (followLinks == TRUE)
339 status = stat(srcName, &srcStatBuf);
341 status = lstat(srcName, &srcStatBuf);
348 if (followLinks == TRUE)
349 status = stat(destName, &dstStatBuf);
351 status = lstat(destName, &dstStatBuf);
353 if (status < 0 || forceFlag==TRUE) {
355 dstStatBuf.st_ino = -1;
356 dstStatBuf.st_dev = -1;
359 if ((srcStatBuf.st_dev == dstStatBuf.st_dev) &&
360 (srcStatBuf.st_ino == dstStatBuf.st_ino)) {
361 error_msg("Copying file \"%s\" to itself\n", srcName);
365 if (S_ISDIR(srcStatBuf.st_mode)) {
366 //fprintf(stderr, "copying directory %s to %s\n", srcName, destName);
367 /* Make sure the directory is writable */
368 status = mkdir(destName, 0777777 ^ umask(0));
369 if (status < 0 && errno != EEXIST) {
373 } else if (S_ISLNK(srcStatBuf.st_mode)) {
374 char link_val[BUFSIZ + 1];
377 //fprintf(stderr, "copying link %s to %s\n", srcName, destName);
378 /* Warning: This could possibly truncate silently, to BUFSIZ chars */
379 link_size = readlink(srcName, &link_val[0], BUFSIZ);
384 link_val[link_size] = '\0';
385 status = symlink(link_val, destName);
390 #if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
391 if (setModes == TRUE) {
392 /* Try to set owner, but fail silently like GNU cp */
393 lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
397 } else if (S_ISFIFO(srcStatBuf.st_mode)) {
398 //fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
399 if (mkfifo(destName, 0644) < 0) {
403 } else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode)
404 || S_ISSOCK(srcStatBuf.st_mode)) {
405 //fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName);
406 if (mknod(destName, srcStatBuf.st_mode, srcStatBuf.st_rdev) < 0) {
410 } else if (S_ISREG(srcStatBuf.st_mode)) {
411 //fprintf(stderr, "copying regular file %s to %s\n", srcName, destName);
412 rfd = open(srcName, O_RDONLY);
418 wfd = open(destName, O_WRONLY | O_CREAT | O_TRUNC,
426 if (copy_file_chunk(rfd, wfd, srcStatBuf.st_size)==FALSE)
430 if (close(wfd) < 0) {
435 if (setModes == TRUE) {
436 /* This is fine, since symlinks never get here */
437 if (chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid) < 0) {
441 if (chmod(destName, srcStatBuf.st_mode) < 0) {
445 times.actime = srcStatBuf.st_atime;
446 times.modtime = srcStatBuf.st_mtime;
447 if (utime(destName, ×) < 0) {
462 #endif /* BB_CP_MV */
466 #if defined BB_TAR || defined BB_LS ||defined BB_AR
468 #define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
469 #define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
471 /* The special bits. If set, display SMODE0/1 instead of MODE0/1 */
472 static const mode_t SBIT[] = {
478 /* The 9 mode bits to test */
479 static const mode_t MBIT[] = {
480 S_IRUSR, S_IWUSR, S_IXUSR,
481 S_IRGRP, S_IWGRP, S_IXGRP,
482 S_IROTH, S_IWOTH, S_IXOTH
485 static const char MODE1[] = "rwxrwxrwx";
486 static const char MODE0[] = "---------";
487 static const char SMODE1[] = "..s..s..t";
488 static const char SMODE0[] = "..S..S..T";
491 * Return the standard ls-like mode string from a file mode.
492 * This is static and so is overwritten on each call.
494 const char *mode_string(int mode)
500 buf[0] = TYPECHAR(mode);
501 for (i = 0; i < 9; i++) {
503 buf[i + 1] = (mode & MBIT[i]) ? SMODE1[i] : SMODE0[i];
505 buf[i + 1] = (mode & MBIT[i]) ? MODE1[i] : MODE0[i];
509 #endif /* BB_TAR || BB_LS */
512 #if defined BB_TAR || defined BB_AR
514 * Return the standard ls-like time string from a time_t
515 * This is static and so is overwritten on each call.
517 const char *time_string(time_t timeVal)
525 str = ctime(&timeVal);
527 strcpy(buf, &str[4]);
530 if ((timeVal > now) || (timeVal < now - 365 * 24 * 60 * 60L)) {
531 strcpy(&buf[7], &str[20]);
537 #endif /* BB_TAR || BB_AR */
539 #if defined BB_TAR || defined BB_CP_MV || defined BB_AR
541 * Write all of the supplied buffer out to a file.
542 * This does multiple writes as necessary.
543 * Returns the amount written, or -1 on an error.
545 int full_write(int fd, const char *buf, int len)
553 cc = write(fd, buf, len);
565 #endif /* BB_TAR || BB_CP_MV || BB_AR */
568 #if defined BB_TAR || defined BB_TAIL || defined BB_AR || defined BB_SH || defined BB_CP_MV
570 * Read all of the supplied buffer from a file.
571 * This does multiple reads as necessary.
572 * Returns the amount read, or -1 on an error.
573 * A short read is returned on an end of file.
575 int full_read(int fd, char *buf, int len)
583 cc = read(fd, buf, len);
598 #endif /* BB_TAR || BB_TAIL || BB_AR || BB_SH */
601 #if defined (BB_CHMOD_CHOWN_CHGRP) \
602 || defined (BB_CP_MV) \
603 || defined (BB_FIND) \
604 || defined (BB_INSMOD) \
610 * Walk down all the directories under the specified
611 * location, and do something (something specified
612 * by the fileAction and dirAction function pointers).
614 * Unfortunately, while nftw(3) could replace this and reduce
615 * code size a bit, nftw() wasn't supported before GNU libc 2.1,
616 * and so isn't sufficiently portable to take over since glibc2.1
617 * is so stinking huge.
619 int recursive_action(const char *fileName,
620 int recurse, int followLinks, int depthFirst,
621 int (*fileAction) (const char *fileName,
622 struct stat * statbuf,
624 int (*dirAction) (const char *fileName,
625 struct stat * statbuf,
633 if (followLinks == TRUE)
634 status = stat(fileName, &statbuf);
636 status = lstat(fileName, &statbuf);
639 #ifdef BB_DEBUG_PRINT_SCAFFOLD
641 "status=%d followLinks=%d TRUE=%d\n",
642 status, followLinks, TRUE);
644 perror_msg("%s", fileName);
648 if ((followLinks == FALSE) && (S_ISLNK(statbuf.st_mode))) {
649 if (fileAction == NULL)
652 return fileAction(fileName, &statbuf, userData);
655 if (recurse == FALSE) {
656 if (S_ISDIR(statbuf.st_mode)) {
657 if (dirAction != NULL)
658 return (dirAction(fileName, &statbuf, userData));
664 if (S_ISDIR(statbuf.st_mode)) {
667 dir = opendir(fileName);
669 perror_msg("%s", fileName);
672 if (dirAction != NULL && depthFirst == FALSE) {
673 status = dirAction(fileName, &statbuf, userData);
674 if (status == FALSE) {
675 perror_msg("%s", fileName);
679 while ((next = readdir(dir)) != NULL) {
680 char nextFile[BUFSIZ + 1];
682 if ((strcmp(next->d_name, "..") == 0)
683 || (strcmp(next->d_name, ".") == 0)) {
686 if (strlen(fileName) + strlen(next->d_name) + 1 > BUFSIZ) {
687 error_msg(name_too_long);
690 memset(nextFile, 0, sizeof(nextFile));
691 sprintf(nextFile, "%s/%s", fileName, next->d_name);
693 recursive_action(nextFile, TRUE, followLinks, depthFirst,
694 fileAction, dirAction, userData);
695 if (status == FALSE) {
700 status = closedir(dir);
702 perror_msg("%s", fileName);
705 if (dirAction != NULL && depthFirst == TRUE) {
706 status = dirAction(fileName, &statbuf, userData);
707 if (status == FALSE) {
708 perror_msg("%s", fileName);
713 if (fileAction == NULL)
716 return fileAction(fileName, &statbuf, userData);
721 #endif /* BB_CHMOD_CHOWN_CHGRP || BB_CP_MV || BB_FIND || BB_LS || BB_INSMOD */
725 #if defined (BB_TAR) || defined (BB_MKDIR) || defined (BB_AR)
727 * Attempt to create the directories along the specified path, except for
728 * the final component. The mode is given for the final directory only,
729 * while all previous ones get default protections. Errors are not reported
730 * here, as failures to restore files can be reported later.
732 extern int create_path(const char *name, int mode)
736 char buf[BUFSIZ + 1];
740 for (cp = buf; *cp == '/'; cp++);
741 cp = strchr(cp, '/');
744 cp = strchr(cp + 1, '/');
746 retVal = mkdir(buf, cp ? 0777 : mode);
747 if (retVal != 0 && errno != EEXIST) {
755 #endif /* BB_TAR || BB_MKDIR */
759 #if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_MKDIR) \
760 || defined (BB_MKFIFO) || defined (BB_MKNOD) || defined (BB_AR)
761 /* [ugoa]{+|-|=}[rwxst] */
765 extern int parse_mode(const char *s, mode_t * theMode)
769 S_ISVTX | S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
785 groups |= S_ISUID | S_IRWXU;
788 groups |= S_ISGID | S_IRWXG;
794 groups |= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
800 if (groups == 0) /* The default is "all" */
802 S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
805 if (isdigit(c) && c >= '0' && c <= '7' &&
806 mode == 0 && groups == 0) {
807 *theMode = strtol(--s, NULL, 8);
815 while ((c = *s++) != '\0') {
820 mode |= S_IRUSR | S_IRGRP | S_IROTH;
823 mode |= S_IWUSR | S_IWGRP | S_IWOTH;
826 mode |= S_IXUSR | S_IXGRP | S_IXOTH;
829 mode |= S_IXGRP | S_ISUID | S_ISGID;
843 andMode &= ~(groups);
846 orMode |= mode & groups;
849 andMode &= ~(mode & groups);
861 /* BB_CHMOD_CHOWN_CHGRP || BB_MKDIR || BB_MKFIFO || BB_MKNOD */
867 #if defined BB_CHMOD_CHOWN_CHGRP || defined BB_PS || defined BB_LS \
868 || defined BB_TAR || defined BB_ID || defined BB_LOGGER \
869 || defined BB_LOGNAME || defined BB_WHOAMI
871 /* This parses entries in /etc/passwd and /etc/group. This is desirable
872 * for BusyBox, since we want to avoid using the glibc NSS stuff, which
873 * increases target size and is often not needed or wanted for embedded
876 * /etc/passwd entries look like this:
877 * root:x:0:0:root:/root:/bin/bash
878 * and /etc/group entries look like this:
881 * This uses buf as storage to hold things.
884 unsigned long my_getid(const char *filename, char *name, long id, long *gid)
887 char *rname, *start, *end, buf[128];
891 file = fopen(filename, "r");
893 /* Do not complain. It is ok for /etc/passwd and
894 * friends to be missing... */
898 while (fgets(buf, 128, file) != NULL) {
902 /* username/group name */
904 end = strchr(start, ':');
912 end = strchr(start, ':');
916 /* uid in passwd, gid in group */
918 rid = (unsigned long) strtol(start, &end, 10);
924 rgid = (unsigned long) strtol(start, &end, 10);
927 if (0 == strcmp(rname, name)) {
928 if (gid) *gid = rgid;
933 if (id != -1 && id == rid) {
934 strncpy(name, rname, 8);
935 if (gid) *gid = rgid;
944 /* returns a uid given a username */
945 long my_getpwnam(char *name)
947 return my_getid("/etc/passwd", name, -1, NULL);
950 /* returns a gid given a group name */
951 long my_getgrnam(char *name)
953 return my_getid("/etc/group", name, -1, NULL);
956 /* gets a username given a uid */
957 void my_getpwuid(char *name, long uid)
959 my_getid("/etc/passwd", name, uid, NULL);
962 /* gets a groupname given a gid */
963 void my_getgrgid(char *group, long gid)
965 my_getid("/etc/group", group, gid, NULL);
968 /* gets a gid given a user name */
969 long my_getpwnamegid(char *name)
972 my_getid("/etc/passwd", name, -1, &gid);
977 /* BB_CHMOD_CHOWN_CHGRP || BB_PS || BB_LS || BB_TAR \
978 || BB_ID || BB_LOGGER || BB_LOGNAME || BB_WHOAMI */
981 #if (defined BB_CHVT) || (defined BB_DEALLOCVT) || (defined BB_SETKEYCODES)
983 /* From <linux/kd.h> */
984 #define KDGKBTYPE 0x4B33 /* get keyboard type */
986 #define KB_101 0x02 /* this is what we always answer */
988 int is_a_console(int fd)
993 return (ioctl(fd, KDGKBTYPE, &arg) == 0
994 && ((arg == KB_101) || (arg == KB_84)));
997 static int open_a_console(char *fnam)
1002 fd = open(fnam, O_RDWR);
1004 /* if failed, try read-only */
1005 if (fd < 0 && errno == EACCES)
1006 fd = open(fnam, O_RDONLY);
1008 /* if failed, try write-only */
1009 if (fd < 0 && errno == EACCES)
1010 fd = open(fnam, O_WRONLY);
1012 /* if failed, fail */
1016 /* if not a console, fail */
1017 if (!is_a_console(fd)) {
1027 * Get an fd for use with kbd/console ioctls.
1028 * We try several things because opening /dev/console will fail
1029 * if someone else used X (which does a chown on /dev/console).
1031 * if tty_name is non-NULL, try this one instead.
1034 int get_console_fd(char *tty_name)
1039 if (-1 == (fd = open_a_console(tty_name)))
1045 fd = open_a_console("/dev/tty");
1049 fd = open_a_console("/dev/tty0");
1053 fd = open_a_console("/dev/console");
1057 for (fd = 0; fd < 3; fd++)
1058 if (is_a_console(fd))
1061 error_msg("Couldnt get a file descriptor referring to the console\n");
1062 return -1; /* total failure */
1066 #endif /* BB_CHVT || BB_DEALLOCVT || BB_SETKEYCODES */
1069 #if defined BB_FIND || defined BB_INSMOD
1071 * Routine to see if a text string is matched by a wildcard pattern.
1072 * Returns TRUE if the text is matched, or FALSE if it is not matched
1073 * or if the pattern is invalid.
1074 * * matches zero or more characters
1075 * ? matches a single character
1076 * [abc] matches 'a', 'b' or 'c'
1077 * \c quotes character c
1078 * Adapted from code written by Ingo Wilken, and
1079 * then taken from sash, Copyright (c) 1999 by David I. Bell
1080 * Permission is granted to use, distribute, or modify this source,
1081 * provided that this copyright notice remains intact.
1082 * Permission to distribute this code under the GPL has been granted.
1084 extern int check_wildcard_match(const char *text, const char *pattern)
1086 const char *retryPat;
1087 const char *retryText;
1095 while (*text || *pattern) {
1107 while ((ch = *pattern++) != ']') {
1118 if (found == FALSE && len!=0) {
1121 if (found == TRUE) {
1122 if (strlen(pattern)==0 && len==1) {
1131 /* fall into next case */
1134 if (*text++ == '\0')
1145 /* fall into next case */
1163 if (pattern == NULL)
1169 #endif /* BB_FIND || BB_INSMOD */
1174 #if defined BB_DF || defined BB_MTAB
1176 * Given a block device, find the mount table entry if that block device
1179 * Given any other file (or directory), find the mount table entry for its
1182 extern struct mntent *find_mount_point(const char *name, const char *table)
1187 struct mntent *mountEntry;
1189 if (stat(name, &s) != 0)
1192 if ((s.st_mode & S_IFMT) == S_IFBLK)
1193 mountDevice = s.st_rdev;
1195 mountDevice = s.st_dev;
1198 if ((mountTable = setmntent(table, "r")) == 0)
1201 while ((mountEntry = getmntent(mountTable)) != 0) {
1202 if (strcmp(name, mountEntry->mnt_dir) == 0
1203 || strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */
1205 if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */
1207 if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */
1210 endmntent(mountTable);
1213 #endif /* BB_DF || BB_MTAB */
1217 #if defined BB_DD || defined BB_TAIL
1219 * Read a number with a possible multiplier.
1220 * Returns -1 if the number format is illegal.
1222 extern long atoi_w_units(const char *cp)
1226 if (!is_decimal(*cp))
1231 while (is_decimal(*cp))
1232 value = value * 10 + *cp++ - '0';
1236 case 'm': /* `tail' uses it traditionally */
1264 #endif /* BB_DD || BB_TAIL */
1267 #if defined BB_INIT || defined BB_SYSLOGD
1268 /* try to open up the specified device */
1269 extern int device_open(char *device, int mode)
1273 m = mode | O_NONBLOCK;
1275 /* Retry up to 5 times */
1276 for (f = 0; f < 5; f++)
1277 if ((fd = open(device, m, 0600)) >= 0)
1281 /* Reset original flags. */
1283 fcntl(fd, F_SETFL, mode);
1286 #endif /* BB_INIT BB_SYSLOGD */
1289 #if defined BB_KILLALL || ( defined BB_FEATURE_LINUXRC && ( defined BB_HALT || defined BB_REBOOT || defined BB_POWEROFF ))
1290 #ifdef BB_FEATURE_USE_DEVPS_PATCH
1291 #include <linux/devps.h> /* For Erik's nifty devps device driver */
1294 #if defined BB_FEATURE_USE_DEVPS_PATCH
1295 /* find_pid_by_name()
1297 * This finds the pid of the specified process,
1298 * by using the /dev/ps device driver.
1300 * Returns a list of all matching PIDs
1302 extern pid_t* find_pid_by_name( char* pidName)
1305 char device[] = "/dev/ps";
1307 pid_t* pid_array = NULL;
1308 pid_t* pidList=NULL;
1311 fd = open(device, O_RDONLY);
1313 error_msg_and_die( "open failed for `%s': %s\n", device, strerror (errno));
1315 /* Find out how many processes there are */
1316 if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0)
1317 error_msg_and_die( "\nDEVPS_GET_PID_LIST: %s\n", strerror (errno));
1319 /* Allocate some memory -- grab a few extras just in case
1320 * some new processes start up while we wait. The kernel will
1321 * just ignore any extras if we give it too many, and will trunc.
1322 * the list if we give it too few. */
1323 pid_array = (pid_t*) xcalloc( num_pids+10, sizeof(pid_t));
1324 pid_array[0] = num_pids+10;
1326 /* Now grab the pid list */
1327 if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0)
1328 error_msg_and_die( "\nDEVPS_GET_PID_LIST: %s\n", strerror (errno));
1330 /* Now search for a match */
1331 for (i=1, j=0; i<pid_array[0] ; i++) {
1333 struct pid_info info;
1335 info.pid = pid_array[i];
1336 if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0)
1337 error_msg_and_die( "\nDEVPS_GET_PID_INFO: %s\n", strerror (errno));
1339 /* Make sure we only match on the process name */
1340 p=info.command_line+1;
1341 while ((*p != 0) && !isspace(*(p)) && (*(p-1) != '\\')) {
1347 if ((strstr(info.command_line, pidName) != NULL)
1348 && (strlen(pidName) == strlen(info.command_line))) {
1349 pidList=xrealloc( pidList, sizeof(pid_t) * (j+2));
1350 pidList[j++]=info.pid;
1360 if (close (fd) != 0)
1361 error_msg_and_die( "close failed for `%s': %s\n",device, strerror (errno));
1365 #else /* BB_FEATURE_USE_DEVPS_PATCH */
1366 #if ! defined BB_FEATURE_USE_PROCFS
1367 #error Sorry, I depend on the /proc filesystem right now.
1370 /* find_pid_by_name()
1372 * This finds the pid of the specified process.
1373 * Currently, it's implemented by rummaging through
1374 * the proc filesystem.
1376 * Returns a list of all matching PIDs
1378 extern pid_t* find_pid_by_name( char* pidName)
1381 struct dirent *next;
1382 pid_t* pidList=NULL;
1385 dir = opendir("/proc");
1387 error_msg_and_die( "Cannot open /proc: %s\n", strerror (errno));
1389 while ((next = readdir(dir)) != NULL) {
1394 /* If it isn't a number, we don't want it */
1395 if (!isdigit(*next->d_name))
1398 sprintf(filename, "/proc/%s/cmdline", next->d_name);
1399 status = fopen(filename, "r");
1403 fgets(buffer, 256, status);
1406 if (strstr(get_last_path_component(buffer), pidName) != NULL) {
1407 pidList=xrealloc( pidList, sizeof(pid_t) * (i+2));
1408 pidList[i++]=strtol(next->d_name, NULL, 0);
1416 #endif /* BB_FEATURE_USE_DEVPS_PATCH */
1417 #endif /* BB_KILLALL || ( BB_FEATURE_LINUXRC && ( BB_HALT || BB_REBOOT || BB_POWEROFF )) */
1420 /* this should really be farmed out to libbusybox.a */
1421 extern void *xmalloc(size_t size)
1423 void *ptr = malloc(size);
1426 error_msg_and_die(memory_exhausted);
1430 extern void *xrealloc(void *old, size_t size)
1432 void *ptr = realloc(old, size);
1434 error_msg_and_die(memory_exhausted);
1438 extern void *xcalloc(size_t nmemb, size_t size)
1440 void *ptr = calloc(nmemb, size);
1442 error_msg_and_die(memory_exhausted);
1447 #if defined BB_FEATURE_NFSMOUNT || defined BB_LS || defined BB_SH || defined BB_WGET
1449 extern char * xstrdup (const char *s) {
1458 error_msg_and_die(memory_exhausted);
1465 #if defined BB_FEATURE_NFSMOUNT
1466 extern char * xstrndup (const char *s, int n) {
1470 error_msg_and_die("xstrndup bug");
1481 #if (__GLIBC__ < 2) && (defined BB_SYSLOGD || defined BB_INIT)
1482 extern int vdprintf(int d, const char *format, va_list ap)
1487 len = vsprintf(buf, format, ap);
1488 return write(d, buf, len);
1490 #endif /* BB_SYSLOGD */
1493 #if defined BB_FEATURE_MOUNT_LOOP
1495 #include "loop.h" /* Pull in loop device support */
1497 extern int del_loop(const char *device)
1501 if ((fd = open(device, O_RDONLY)) < 0) {
1505 if (ioctl(fd, LOOP_CLR_FD, 0) < 0) {
1506 perror("ioctl: LOOP_CLR_FD");
1513 extern int set_loop(const char *device, const char *file, int offset,
1516 struct loop_info loopinfo;
1519 mode = *loopro ? O_RDONLY : O_RDWR;
1520 if ((ffd = open(file, mode)) < 0 && !*loopro
1521 && (errno != EROFS || (ffd = open(file, mode = O_RDONLY)) < 0)) {
1525 if ((fd = open(device, mode)) < 0) {
1530 *loopro = (mode == O_RDONLY);
1532 memset(&loopinfo, 0, sizeof(loopinfo));
1533 strncpy(loopinfo.lo_name, file, LO_NAME_SIZE);
1534 loopinfo.lo_name[LO_NAME_SIZE - 1] = 0;
1536 loopinfo.lo_offset = offset;
1538 loopinfo.lo_encrypt_key_size = 0;
1539 if (ioctl(fd, LOOP_SET_FD, ffd) < 0) {
1540 perror("ioctl: LOOP_SET_FD");
1545 if (ioctl(fd, LOOP_SET_STATUS, &loopinfo) < 0) {
1546 (void) ioctl(fd, LOOP_CLR_FD, 0);
1547 perror("ioctl: LOOP_SET_STATUS");
1557 extern char *find_unused_loop_device(void)
1561 struct stat statbuf;
1562 struct loop_info loopinfo;
1564 for (i = 0; i <= 7; i++) {
1565 sprintf(dev, "/dev/loop%d", i);
1566 if (stat(dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) {
1567 if ((fd = open(dev, O_RDONLY)) >= 0) {
1568 if (ioctl(fd, LOOP_GET_STATUS, &loopinfo) == -1) {
1569 if (errno == ENXIO) { /* probably free */
1580 #endif /* BB_FEATURE_MOUNT_LOOP */
1582 #if defined BB_MOUNT || defined BB_DF || ( defined BB_UMOUNT && ! defined BB_MTAB)
1583 extern int find_real_root_device_name(char* name)
1586 struct dirent *entry;
1587 struct stat statBuf, rootStat;
1588 char fileName[BUFSIZ];
1590 if (stat("/", &rootStat) != 0) {
1591 error_msg("could not stat '/'\n");
1595 dir = opendir("/dev");
1597 error_msg("could not open '/dev'\n");
1601 while((entry = readdir(dir)) != NULL) {
1603 /* Must skip ".." since that is "/", and so we
1604 * would get a false positive on ".." */
1605 if (strcmp(entry->d_name, "..") == 0)
1608 snprintf( fileName, strlen(name)+1, "/dev/%s", entry->d_name);
1610 if (stat(fileName, &statBuf) != 0)
1612 /* Some char devices have the same dev_t as block
1613 * devices, so make sure this is a block device */
1614 if (! S_ISBLK(statBuf.st_mode))
1616 if (statBuf.st_rdev == rootStat.st_rdev) {
1617 strcpy(name, fileName);
1627 /* get_line_from_file() - This function reads an entire line from a text file
1628 * up to a newline. It returns a malloc'ed char * which must be stored and
1629 * free'ed by the caller. */
1630 extern char *get_line_from_file(FILE *file)
1632 static const int GROWBY = 80; /* how large we will grow strings by */
1636 char *linebuf = NULL;
1643 /* grow the line buffer as necessary */
1644 while (idx > linebufsz-2)
1645 linebuf = xrealloc(linebuf, linebufsz += GROWBY);
1646 linebuf[idx++] = (char)ch;
1647 if ((char)ch == '\n')
1659 extern void print_file(FILE *file)
1663 while ((c = getc(file)) != EOF)
1669 extern int print_file_by_name(char *filename)
1672 if ((file = wfopen(filename, "r")) == NULL)
1679 #if defined BB_ECHO || defined BB_SH || defined BB_TR
1680 char process_escape_sequence(char **ptr)
1684 switch (c = *(*ptr)++) {
1709 case '0': case '1': case '2': case '3':
1710 case '4': case '5': case '6': case '7':
1712 if ('0' <= **ptr && **ptr <= '7') {
1713 c = c * 8 + (*(*ptr)++ - '0');
1714 if ('0' <= **ptr && **ptr <= '7')
1715 c = c * 8 + (*(*ptr)++ - '0');
1727 #if defined BB_BASENAME || defined BB_LN || defined BB_SH || defined BB_INIT || defined BB_FEATURE_USE_PROCFS
1728 char *get_last_path_component(char *path)
1730 char *s=path+strlen(path)-1;
1732 /* strip trailing slashes */
1733 while (s && *s == '/') {
1737 /* find last component */
1738 s = strrchr(path, '/');
1739 if (s==NULL) return path;
1744 #if defined BB_GREP || defined BB_SED
1745 void xregcomp(regex_t *preg, const char *regex, int cflags)
1748 if ((ret = regcomp(preg, regex, cflags)) != 0) {
1749 int errmsgsz = regerror(ret, preg, NULL, 0);
1750 char *errmsg = xmalloc(errmsgsz);
1751 regerror(ret, preg, errmsg, errmsgsz);
1752 error_msg_and_die("xregcomp: %s\n", errmsg);
1757 #if defined BB_CAT || defined BB_HEAD || defined BB_WC
1758 FILE *wfopen(const char *path, const char *mode)
1761 if ((fp = fopen(path, mode)) == NULL) {
1762 error_msg("%s: %s\n", path, strerror(errno));
1769 #if defined BB_HOSTNAME || defined BB_LOADACM || defined BB_MORE \
1770 || defined BB_SED || defined BB_SH || defined BB_UNIQ \
1771 || defined BB_WC || defined BB_CMP
1772 FILE *xfopen(const char *path, const char *mode)
1775 if ((fp = fopen(path, mode)) == NULL)
1776 error_msg_and_die("%s: %s\n", path, strerror(errno));
1781 int applet_name_compare(const void *x, const void *y)
1783 const struct BB_applet *applet1 = x;
1784 const struct BB_applet *applet2 = y;
1786 return strcmp(applet1->name, applet2->name);
1792 c-file-style: "linux"