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) \
33 || defined (BB_INSMOD)
34 /* same conditions as recursiveAction */
35 #define bb_need_name_too_long
37 #define BB_DECLARE_EXTERN
50 #include <sys/param.h> /* for PATH_MAX */
51 #include <sys/utsname.h> /* for uname(2) */
53 #if defined BB_FEATURE_MOUNT_LOOP
55 #include <sys/ioctl.h>
56 #include <linux/loop.h>
59 /* Busybox mount uses either /proc/filesystems or /dev/mtab to get the
60 * list of available filesystems used for the -t auto option */
61 #if defined BB_FEATURE_USE_PROCFS && defined BB_FEATURE_USE_DEVPS_PATCH
62 //#error Sorry, but busybox can't use both /proc and /dev/ps at the same time -- Pick one and try again.
63 #error "Sorry, but busybox can't use both /proc and /dev/ps at the same time -- Pick one and try again."
67 #if defined BB_MOUNT || defined BB_UMOUNT || defined BB_DF
68 # if defined BB_FEATURE_USE_PROCFS
69 const char mtab_file[] = "/proc/mounts";
72 const char mtab_file[] = "/etc/mtab";
74 # if defined BB_FEATURE_USE_DEVPS_PATCH
75 const char mtab_file[] = "/dev/mtab";
77 # 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)
84 extern void usage(const char *usage)
86 fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n",
88 fprintf(stderr, "Usage: %s\n", usage);
92 extern void errorMsg(const char *s, ...)
98 vfprintf(stderr, s, p);
103 extern void fatalError(const char *s, ...)
109 vfprintf(stderr, s, p);
116 /* Returns kernel version encoded as major*65536 + minor*256 + patch,
117 * so, for example, to check if the kernel is greater than 2.2.11:
118 * if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> }
120 extern int get_kernel_revision(void)
123 int major = 0, minor = 0, patch = 0;
125 if (uname(&name) == -1) {
126 perror("cannot get system information");
129 sscanf(name.version, "%d.%d.%d", &major, &minor, &patch);
130 return major * 65536 + minor * 256 + patch;
134 #if defined (BB_CP_MV) || defined (BB_DU)
136 #define HASH_SIZE 311 /* Should be prime */
137 #define hash_inode(i) ((i) % HASH_SIZE)
139 static ino_dev_hashtable_bucket_t *ino_dev_hashtable[HASH_SIZE];
142 * Return 1 if statbuf->st_ino && statbuf->st_dev are recorded in
143 * `ino_dev_hashtable', else return 0
145 * If NAME is a non-NULL pointer to a character pointer, and there is
146 * a match, then set *NAME to the value of the name slot in that
149 int is_in_ino_dev_hashtable(const struct stat *statbuf, char **name)
151 ino_dev_hashtable_bucket_t *bucket;
153 bucket = ino_dev_hashtable[hash_inode(statbuf->st_ino)];
154 while (bucket != NULL) {
155 if ((bucket->ino == statbuf->st_ino) &&
156 (bucket->dev == statbuf->st_dev))
158 if (name) *name = bucket->name;
161 bucket = bucket->next;
166 /* Add statbuf to statbuf hash table */
167 void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name)
171 ino_dev_hashtable_bucket_t *bucket;
173 i = hash_inode(statbuf->st_ino);
174 s = name ? strlen(name) : 0;
175 bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + s);
176 bucket->ino = statbuf->st_ino;
177 bucket->dev = statbuf->st_dev;
179 strcpy(bucket->name, name);
181 bucket->name[0] = '\0';
182 bucket->next = ino_dev_hashtable[i];
183 ino_dev_hashtable[i] = bucket;
186 /* Clear statbuf hash table */
187 void reset_ino_dev_hashtable(void)
190 ino_dev_hashtable_bucket_t *bucket;
192 for (i = 0; i < HASH_SIZE; i++) {
193 while (ino_dev_hashtable[i] != NULL) {
194 bucket = ino_dev_hashtable[i]->next;
195 free(ino_dev_hashtable[i]);
196 ino_dev_hashtable[i] = bucket;
201 #endif /* BB_CP_MV || BB_DU */
203 #if defined (BB_CP_MV) || defined (BB_DU) || defined (BB_LN)
205 * Return TRUE if a fileName is a directory.
206 * Nonexistant files return FALSE.
208 int isDirectory(const char *fileName, const int followLinks, struct stat *statBuf)
213 if (statBuf == NULL) {
214 statBuf = (struct stat *)xmalloc(sizeof(struct stat));
218 if (followLinks == TRUE)
219 status = stat(fileName, statBuf);
221 status = lstat(fileName, statBuf);
223 if (status < 0 || !(S_ISDIR(statBuf->st_mode))) {
236 #if defined (BB_CP_MV)
238 * Copy one file to another, while possibly preserving its modes, times,
239 * and modes. Returns TRUE if successful, or FALSE on a failure with an
240 * error message output. (Failure is not indicated if the attributes cannot
245 copyFile(const char *srcName, const char *destName,
246 int setModes, int followLinks)
253 struct stat srcStatBuf;
254 struct stat dstStatBuf;
255 struct utimbuf times;
257 if (followLinks == TRUE)
258 status = stat(srcName, &srcStatBuf);
260 status = lstat(srcName, &srcStatBuf);
267 if (followLinks == TRUE)
268 status = stat(destName, &dstStatBuf);
270 status = lstat(destName, &dstStatBuf);
273 dstStatBuf.st_ino = -1;
274 dstStatBuf.st_dev = -1;
277 if ((srcStatBuf.st_dev == dstStatBuf.st_dev) &&
278 (srcStatBuf.st_ino == dstStatBuf.st_ino)) {
279 fprintf(stderr, "Copying file \"%s\" to itself\n", srcName);
283 if (S_ISDIR(srcStatBuf.st_mode)) {
284 //fprintf(stderr, "copying directory %s to %s\n", srcName, destName);
285 /* Make sure the directory is writable */
286 status = mkdir(destName, 0777777 ^ umask(0));
287 if (status < 0 && errno != EEXIST) {
291 } else if (S_ISLNK(srcStatBuf.st_mode)) {
292 char link_val[PATH_MAX + 1];
295 //fprintf(stderr, "copying link %s to %s\n", srcName, destName);
296 /* Warning: This could possibly truncate silently, to PATH_MAX chars */
297 link_size = readlink(srcName, &link_val[0], PATH_MAX);
302 link_val[link_size] = '\0';
303 status = symlink(link_val, destName);
308 #if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
309 if (setModes == TRUE) {
310 if (lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid) < 0) {
317 } else if (S_ISFIFO(srcStatBuf.st_mode)) {
318 //fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
319 if (mkfifo(destName, 0644) < 0) {
323 } else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode)
324 || S_ISSOCK(srcStatBuf.st_mode)) {
325 //fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName);
326 if (mknod(destName, srcStatBuf.st_mode, srcStatBuf.st_rdev) < 0) {
330 } else if (S_ISREG(srcStatBuf.st_mode)) {
331 //fprintf(stderr, "copying regular file %s to %s\n", srcName, destName);
332 rfd = open(srcName, O_RDONLY);
339 open(destName, O_WRONLY | O_CREAT | O_TRUNC,
347 while ((rcc = read(rfd, buf, sizeof(buf))) > 0) {
348 if (fullWrite(wfd, buf, rcc) < 0)
356 if (close(wfd) < 0) {
361 if (setModes == TRUE) {
362 /* This is fine, since symlinks never get here */
363 if (chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid) < 0) {
367 if (chmod(destName, srcStatBuf.st_mode) < 0) {
371 times.actime = srcStatBuf.st_atime;
372 times.modtime = srcStatBuf.st_mtime;
373 if (utime(destName, ×) < 0) {
388 #endif /* BB_CP_MV */
392 #if defined BB_TAR || defined BB_LS
394 #define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
395 #define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
397 /* The special bits. If set, display SMODE0/1 instead of MODE0/1 */
398 static const mode_t SBIT[] = {
404 /* The 9 mode bits to test */
405 static const mode_t MBIT[] = {
406 S_IRUSR, S_IWUSR, S_IXUSR,
407 S_IRGRP, S_IWGRP, S_IXGRP,
408 S_IROTH, S_IWOTH, S_IXOTH
411 #define MODE1 "rwxrwxrwx"
412 #define MODE0 "---------"
413 #define SMODE1 "..s..s..t"
414 #define SMODE0 "..S..S..T"
417 * Return the standard ls-like mode string from a file mode.
418 * This is static and so is overwritten on each call.
420 const char *modeString(int mode)
426 buf[0] = TYPECHAR(mode);
427 for (i = 0; i < 9; i++) {
429 buf[i + 1] = (mode & MBIT[i]) ? SMODE1[i] : SMODE0[i];
431 buf[i + 1] = (mode & MBIT[i]) ? MODE1[i] : MODE0[i];
435 #endif /* BB_TAR || BB_LS */
440 * Return the standard ls-like time string from a time_t
441 * This is static and so is overwritten on each call.
443 const char *timeString(time_t timeVal)
451 str = ctime(&timeVal);
453 strcpy(buf, &str[4]);
456 if ((timeVal > now) || (timeVal < now - 365 * 24 * 60 * 60L)) {
457 strcpy(&buf[7], &str[20]);
465 #if defined BB_TAR || defined BB_CP_MV
467 * Write all of the supplied buffer out to a file.
468 * This does multiple writes as necessary.
469 * Returns the amount written, or -1 on an error.
471 int fullWrite(int fd, const char *buf, int len)
479 cc = write(fd, buf, len);
491 #endif /* BB_TAR || BB_CP_MV */
494 #if defined BB_TAR || defined BB_TAIL
496 * Read all of the supplied buffer from a file.
497 * This does multiple reads as necessary.
498 * Returns the amount read, or -1 on an error.
499 * A short read is returned on an end of file.
501 int fullRead(int fd, char *buf, int len)
509 cc = read(fd, buf, len);
524 #endif /* BB_TAR || BB_TAIL */
527 #if defined (BB_CHMOD_CHOWN_CHGRP) \
528 || defined (BB_CP_MV) \
529 || defined (BB_FIND) \
530 || defined (BB_INSMOD) \
535 * Walk down all the directories under the specified
536 * location, and do something (something specified
537 * by the fileAction and dirAction function pointers).
539 * Unfortunatly, while nftw(3) could replace this and reduce
540 * code size a bit, nftw() wasn't supported before GNU libc 2.1,
541 * and so isn't sufficiently portable to take over since glibc2.1
542 * is so stinking huge.
544 int recursiveAction(const char *fileName,
545 int recurse, int followLinks, int depthFirst,
546 int (*fileAction) (const char *fileName,
547 struct stat * statbuf,
549 int (*dirAction) (const char *fileName,
550 struct stat * statbuf,
558 if (followLinks == TRUE)
559 status = stat(fileName, &statbuf);
561 status = lstat(fileName, &statbuf);
564 #ifdef BB_DEBUG_PRINT_SCAFFOLD
566 "status=%d followLinks=%d TRUE=%d\n",
567 status, followLinks, TRUE);
573 if ((followLinks == FALSE) && (S_ISLNK(statbuf.st_mode))) {
574 if (fileAction == NULL)
577 return fileAction(fileName, &statbuf, userData);
580 if (recurse == FALSE) {
581 if (S_ISDIR(statbuf.st_mode)) {
582 if (dirAction != NULL)
583 return (dirAction(fileName, &statbuf, userData));
589 if (S_ISDIR(statbuf.st_mode)) {
592 dir = opendir(fileName);
597 if (dirAction != NULL && depthFirst == FALSE) {
598 status = dirAction(fileName, &statbuf, userData);
599 if (status == FALSE) {
604 while ((next = readdir(dir)) != NULL) {
605 char nextFile[PATH_MAX + 1];
607 if ((strcmp(next->d_name, "..") == 0)
608 || (strcmp(next->d_name, ".") == 0)) {
611 if (strlen(fileName) + strlen(next->d_name) + 1 > PATH_MAX) {
612 fprintf(stderr, name_too_long, "ftw");
615 memset(nextFile, 0, sizeof(nextFile));
616 sprintf(nextFile, "%s/%s", fileName, next->d_name);
618 recursiveAction(nextFile, TRUE, followLinks, depthFirst,
619 fileAction, dirAction, userData);
625 status = closedir(dir);
630 if (dirAction != NULL && depthFirst == TRUE) {
631 status = dirAction(fileName, &statbuf, userData);
632 if (status == FALSE) {
638 if (fileAction == NULL)
641 return fileAction(fileName, &statbuf, userData);
646 #endif /* BB_CHMOD_CHOWN_CHGRP || BB_CP_MV || BB_FIND || BB_LS || BB_INSMOD */
650 #if defined (BB_TAR) || defined (BB_MKDIR)
652 * Attempt to create the directories along the specified path, except for
653 * the final component. The mode is given for the final directory only,
654 * while all previous ones get default protections. Errors are not reported
655 * here, as failures to restore files can be reported later.
657 extern int createPath(const char *name, int mode)
661 char buf[PATH_MAX + 1];
665 for (cp = buf; *cp == '/'; cp++);
666 cp = strchr(cp, '/');
669 cp = strchr(cp + 1, '/');
671 retVal = mkdir(buf, cp ? 0777 : mode);
672 if (retVal != 0 && errno != EEXIST) {
680 #endif /* BB_TAR || BB_MKDIR */
684 #if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_MKDIR)
685 /* [ugoa]{+|-|=}[rwxst] */
689 extern int parse_mode(const char *s, mode_t * theMode)
693 S_ISVTX | S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
706 groups |= S_ISUID | S_IRWXU;
709 groups |= S_ISGID | S_IRWXG;
715 groups |= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
721 if (groups == 0) /* The default is "all" */
723 S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
726 if (isdigit(c) && c >= '0' && c <= '7' &&
727 mode == 0 && groups == 0) {
728 *theMode = strtol(--s, NULL, 8);
736 while ((c = *s++) != '\0') {
741 mode |= S_IRUSR | S_IRGRP | S_IROTH;
744 mode |= S_IWUSR | S_IWGRP | S_IWOTH;
747 mode |= S_IXUSR | S_IXGRP | S_IXOTH;
750 mode |= S_IXGRP | S_ISUID | S_ISGID;
764 andMode &= ~(groups);
767 orMode |= mode & groups;
770 andMode &= ~(mode & groups);
781 #endif /* BB_CHMOD_CHOWN_CHGRP || BB_MKDIR */
789 #if defined BB_CHMOD_CHOWN_CHGRP || defined BB_PS || defined BB_LS || defined BB_TAR
791 /* Use this to avoid needing the glibc NSS stuff
792 * This uses storage buf to hold things.
794 uid_t my_getid(const char *filename, char *name, uid_t id)
797 char *rname, *start, *end, buf[128];
800 file = fopen(filename, "r");
806 while (fgets(buf, 128, file) != NULL) {
811 end = strchr(start, ':');
818 end = strchr(start, ':');
823 rid = (uid_t) strtol(start, &end, 10);
828 if (0 == strcmp(rname, name)) {
833 if (id != -1 && id == rid) {
834 strncpy(name, rname, 8);
843 uid_t my_getpwnam(char *name)
845 return my_getid("/etc/passwd", name, -1);
848 gid_t my_getgrnam(char *name)
850 return my_getid("/etc/group", name, -1);
853 void my_getpwuid(char *name, uid_t uid)
855 my_getid("/etc/passwd", name, uid);
858 void my_getgrgid(char *group, gid_t gid)
860 my_getid("/etc/group", group, gid);
864 #endif /* BB_CHMOD_CHOWN_CHGRP || BB_PS || BB_LS || BB_TAR */
869 #if (defined BB_CHVT) || (defined BB_DEALLOCVT)
872 #include <linux/kd.h>
873 #include <sys/ioctl.h>
875 int is_a_console(int fd)
880 return (ioctl(fd, KDGKBTYPE, &arg) == 0
881 && ((arg == KB_101) || (arg == KB_84)));
884 static int open_a_console(char *fnam)
889 fd = open(fnam, O_RDWR);
891 /* if failed, try read-only */
892 if (fd < 0 && errno == EACCES)
893 fd = open(fnam, O_RDONLY);
895 /* if failed, try write-only */
896 if (fd < 0 && errno == EACCES)
897 fd = open(fnam, O_WRONLY);
899 /* if failed, fail */
903 /* if not a console, fail */
904 if (!is_a_console(fd)) {
914 * Get an fd for use with kbd/console ioctls.
915 * We try several things because opening /dev/console will fail
916 * if someone else used X (which does a chown on /dev/console).
918 * if tty_name is non-NULL, try this one instead.
921 int get_console_fd(char *tty_name)
926 if (-1 == (fd = open_a_console(tty_name)))
932 fd = open_a_console("/dev/tty");
936 fd = open_a_console("/dev/tty0");
940 fd = open_a_console("/dev/console");
944 for (fd = 0; fd < 3; fd++)
945 if (is_a_console(fd))
949 "Couldnt get a file descriptor referring to the console\n");
950 return -1; /* total failure */
954 #endif /* BB_CHVT || BB_DEALLOCVT */
957 #if !defined BB_REGEXP && (defined BB_GREP || defined BB_SED)
959 /* Do a case insensitive strstr() */
960 char *stristr(char *haystack, const char *needle)
962 int len = strlen(needle);
965 if (!strncasecmp(haystack, needle, len))
976 /* This tries to find a needle in a haystack, but does so by
977 * only trying to match literal strings (look 'ma, no regexps!)
978 * This is short, sweet, and carries _very_ little baggage,
979 * unlike its beefier cousin in regexp.c
982 extern int find_match(char *haystack, char *needle, int ignoreCase)
985 if (ignoreCase == FALSE)
986 haystack = strstr(haystack, needle);
988 haystack = stristr(haystack, needle);
989 if (haystack == NULL)
995 /* This performs substitutions after a string match has been found. */
996 extern int replace_match(char *haystack, char *needle, char *newNeedle,
1000 char *where, *slider, *slider1, *oldhayStack;
1002 if (ignoreCase == FALSE)
1003 where = strstr(haystack, needle);
1005 where = stristr(haystack, needle);
1007 if (strcmp(needle, newNeedle) == 0)
1010 oldhayStack = (char *) xmalloc((unsigned) (strlen(haystack)));
1011 while (where != NULL) {
1013 strcpy(oldhayStack, haystack);
1015 if (strlen(newNeedle) > strlen(needle)) {
1017 (char *) realloc(haystack,
1018 (unsigned) (strlen(haystack) -
1020 strlen(newNeedle)));
1023 for (slider = haystack, slider1 = oldhayStack; slider != where;
1024 slider++, slider1++);
1026 haystack = strcat(haystack, newNeedle);
1027 slider1 += strlen(needle);
1028 haystack = strcat(haystack, slider1);
1029 where = strstr(slider, needle);
1039 #endif /* ! BB_REGEXP && (BB_GREP || BB_SED) */
1044 * Routine to see if a text string is matched by a wildcard pattern.
1045 * Returns TRUE if the text is matched, or FALSE if it is not matched
1046 * or if the pattern is invalid.
1047 * * matches zero or more characters
1048 * ? matches a single character
1049 * [abc] matches 'a', 'b' or 'c'
1050 * \c quotes character c
1051 * Adapted from code written by Ingo Wilken, and
1052 * then taken from sash, Copyright (c) 1999 by David I. Bell
1053 * Permission is granted to use, distribute, or modify this source,
1054 * provided that this copyright notice remains intact.
1055 * Permission to distribute this code under the GPL has been granted.
1057 extern int check_wildcard_match(const char *text, const char *pattern)
1059 const char *retryPat;
1060 const char *retryText;
1068 while (*text || *pattern) {
1080 while ((ch = *pattern++) != ']') {
1091 if (found == FALSE && len!=0) {
1094 if (found == TRUE) {
1095 if (strlen(pattern)==0 && len==1) {
1104 /* fall into next case */
1107 if (*text++ == '\0')
1118 /* fall into next case */
1136 if (pattern == NULL)
1142 #endif /* BB_FIND */
1147 #if defined BB_DF || defined BB_MTAB
1149 * Given a block device, find the mount table entry if that block device
1152 * Given any other file (or directory), find the mount table entry for its
1155 extern struct mntent *findMountPoint(const char *name, const char *table)
1160 struct mntent *mountEntry;
1162 if (stat(name, &s) != 0)
1165 if ((s.st_mode & S_IFMT) == S_IFBLK)
1166 mountDevice = s.st_rdev;
1168 mountDevice = s.st_dev;
1171 if ((mountTable = setmntent(table, "r")) == 0)
1174 while ((mountEntry = getmntent(mountTable)) != 0) {
1175 if (strcmp(name, mountEntry->mnt_dir) == 0
1176 || strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */
1178 if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */
1180 if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */
1183 endmntent(mountTable);
1186 #endif /* BB_DF || BB_MTAB */
1190 #if defined BB_DD || defined BB_TAIL
1192 * Read a number with a possible multiplier.
1193 * Returns -1 if the number format is illegal.
1195 extern long getNum(const char *cp)
1199 if (!isDecimal(*cp))
1204 while (isDecimal(*cp))
1205 value = value * 10 + *cp++ - '0';
1209 case 'm': /* `tail' uses it traditionally */
1237 #endif /* BB_DD || BB_TAIL */
1240 #if defined BB_INIT || defined BB_SYSLOGD
1241 /* try to open up the specified device */
1242 extern int device_open(char *device, int mode)
1246 m = mode | O_NONBLOCK;
1248 /* Retry up to 5 times */
1249 for (f = 0; f < 5; f++)
1250 if ((fd = open(device, m, 0600)) >= 0)
1254 /* Reset original flags. */
1256 fcntl(fd, F_SETFL, mode);
1259 #endif /* BB_INIT BB_SYSLOGD */
1262 #if defined BB_KILLALL || ( defined BB_FEATURE_LINUXRC && ( defined BB_HALT || defined BB_REBOOT || defined BB_POWEROFF ))
1263 #ifdef BB_FEATURE_USE_DEVPS_PATCH
1264 #include <linux/devps.h>
1267 #if defined BB_FEATURE_USE_DEVPS_PATCH
1270 * This finds the pid of the specified process,
1271 * by using the /dev/ps device driver.
1273 * Returns a list of all matching PIDs
1275 extern pid_t* findPidByName( char* pidName)
1278 char device[] = "/dev/ps";
1280 pid_t* pid_array = NULL;
1281 pid_t* pidList=NULL;
1284 fd = open(device, O_RDONLY);
1286 fatalError( "open failed for `%s': %s\n", device, strerror (errno));
1288 /* Find out how many processes there are */
1289 if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0)
1290 fatalError( "\nDEVPS_GET_PID_LIST: %s\n", strerror (errno));
1292 /* Allocate some memory -- grab a few extras just in case
1293 * some new processes start up while we wait. The kernel will
1294 * just ignore any extras if we give it too many, and will trunc.
1295 * the list if we give it too few. */
1296 pid_array = (pid_t*) calloc( num_pids+10, sizeof(pid_t));
1297 pid_array[0] = num_pids+10;
1299 /* Now grab the pid list */
1300 if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0)
1301 fatalError( "\nDEVPS_GET_PID_LIST: %s\n", strerror (errno));
1303 /* Now search for a match */
1304 for (i=1; i<pid_array[0] ; i++) {
1306 struct pid_info info;
1308 info.pid = pid_array[i];
1309 if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0)
1310 fatalError( "\nDEVPS_GET_PID_INFO: %s\n", strerror (errno));
1312 /* Make sure we only match on the process name */
1313 p=info.command_line+1;
1314 while ((*p != 0) && !isspace(*(p)) && (*(p-1) != '\\')) {
1320 if ((strstr(info.command_line, pidName) != NULL)
1321 && (strlen(pidName) == strlen(info.command_line))) {
1322 pidList=realloc( pidList, sizeof(pid_t) * (j+2));
1324 fatalError("out of memory\n");
1325 pidList[j++]=info.pid;
1335 if (close (fd) != 0)
1336 fatalError( "close failed for `%s': %s\n",device, strerror (errno));
1340 #else /* BB_FEATURE_USE_DEVPS_PATCH */
1341 #if ! defined BB_FEATURE_USE_PROCFS
1342 #error Sorry, I depend on the /proc filesystem right now.
1347 * This finds the pid of the specified process.
1348 * Currently, it's implemented by rummaging through
1349 * the proc filesystem.
1351 * Returns a list of all matching PIDs
1353 extern pid_t* findPidByName( char* pidName)
1356 struct dirent *next;
1357 pid_t* pidList=NULL;
1360 dir = opendir("/proc");
1362 fatalError( "Cannot open /proc: %s\n", strerror (errno));
1364 while ((next = readdir(dir)) != NULL) {
1370 /* If it isn't a number, we don't want it */
1371 if (!isdigit(*next->d_name))
1374 /* Now open the status file */
1375 sprintf(filename, "/proc/%s/status", next->d_name);
1376 status = fopen(filename, "r");
1380 fgets(buffer, 256, status);
1383 /* Make sure we only match on the process name */
1384 p=buffer+5; /* Skip the name */
1386 if (*p==0 || *p=='\n') {
1391 p=buffer+6; /* Skip the "Name:\t" */
1393 if ((strstr(p, pidName) != NULL)
1394 && (strlen(pidName) == strlen(p))) {
1395 pidList=realloc( pidList, sizeof(pid_t) * (i+2));
1397 fatalError("out of memory\n");
1398 pidList[i++]=strtol(next->d_name, NULL, 0);
1405 #endif /* BB_FEATURE_USE_DEVPS_PATCH */
1406 #endif /* BB_KILLALL || ( BB_FEATURE_LINUXRC && ( BB_HALT || BB_REBOOT || BB_POWEROFF )) */
1408 /* this should really be farmed out to libbusybox.a */
1409 extern void *xmalloc(size_t size)
1411 void *cp = malloc(size);
1414 fatalError("out of memory\n");
1418 #if (__GLIBC__ < 2) && (defined BB_SYSLOGD || defined BB_INIT)
1419 extern int vdprintf(int d, const char *format, va_list ap)
1424 len = vsprintf(buf, format, ap);
1425 return write(d, buf, len);
1427 #endif /* BB_SYSLOGD */
1429 #if defined BB_FEATURE_MOUNT_LOOP
1430 extern int del_loop(const char *device)
1434 if ((fd = open(device, O_RDONLY)) < 0) {
1438 if (ioctl(fd, LOOP_CLR_FD, 0) < 0) {
1439 perror("ioctl: LOOP_CLR_FD");
1446 extern int set_loop(const char *device, const char *file, int offset,
1449 struct loop_info loopinfo;
1452 mode = *loopro ? O_RDONLY : O_RDWR;
1453 if ((ffd = open(file, mode)) < 0 && !*loopro
1454 && (errno != EROFS || (ffd = open(file, mode = O_RDONLY)) < 0)) {
1458 if ((fd = open(device, mode)) < 0) {
1463 *loopro = (mode == O_RDONLY);
1465 memset(&loopinfo, 0, sizeof(loopinfo));
1466 strncpy(loopinfo.lo_name, file, LO_NAME_SIZE);
1467 loopinfo.lo_name[LO_NAME_SIZE - 1] = 0;
1469 loopinfo.lo_offset = offset;
1471 loopinfo.lo_encrypt_key_size = 0;
1472 if (ioctl(fd, LOOP_SET_FD, ffd) < 0) {
1473 perror("ioctl: LOOP_SET_FD");
1478 if (ioctl(fd, LOOP_SET_STATUS, &loopinfo) < 0) {
1479 (void) ioctl(fd, LOOP_CLR_FD, 0);
1480 perror("ioctl: LOOP_SET_STATUS");
1490 extern char *find_unused_loop_device(void)
1494 struct stat statbuf;
1495 struct loop_info loopinfo;
1497 for (i = 0; i <= 7; i++) {
1498 sprintf(dev, "/dev/loop%d", i);
1499 if (stat(dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) {
1500 if ((fd = open(dev, O_RDONLY)) >= 0) {
1501 if (ioctl(fd, LOOP_GET_STATUS, &loopinfo) == -1) {
1502 if (errno == ENXIO) { /* probably free */
1513 #endif /* BB_FEATURE_MOUNT_LOOP */
1515 #if defined BB_MOUNT || defined BB_DF
1516 extern int find_real_root_device_name(char* name)
1519 struct dirent *entry;
1520 struct stat statBuf, rootStat;
1521 char fileName[BUFSIZ];
1523 if (stat("/", &rootStat) != 0) {
1524 errorMsg("could not stat '/'\n");
1528 dir = opendir("/dev");
1530 errorMsg("could not open '/dev'\n");
1534 while((entry = readdir(dir)) != NULL) {
1536 /* Must skip ".." since that is "/", and so we
1537 * would get a false positive on ".." */
1538 if (strcmp(entry->d_name, "..") == 0)
1541 sprintf( fileName, "/dev/%s", entry->d_name);
1543 if (stat(fileName, &statBuf) != 0)
1545 /* Some char devices have the same dev_t as block
1546 * devices, so make sure this is a block device */
1547 if (! S_ISBLK(statBuf.st_mode))
1549 if (statBuf.st_rdev == rootStat.st_rdev) {
1550 strcpy(name, fileName);
1559 const unsigned int CSTRING_BUFFER_LENGTH = 128;
1560 /* recursive parser that returns cstrings of arbitrary length
1564 cstring_alloc(FILE* f, int depth)
1567 char buffer[CSTRING_BUFFER_LENGTH];
1568 int target = CSTRING_BUFFER_LENGTH * depth;
1574 while ((buffer[i] = fgetc(f)) != EOF) {
1575 if (buffer[i++] == 0x0a) { break; }
1576 if (i == CSTRING_BUFFER_LENGTH) { break; }
1580 /* recurse or malloc? */
1581 if (len == CSTRING_BUFFER_LENGTH) {
1582 cstring = cstring_alloc(f, (depth + 1));
1584 /* [special case] EOF */
1585 if ((depth | len) == 0) { return NULL; }
1588 size = target + len + 1;
1589 cstring = malloc(size);
1590 if (!cstring) { return NULL; }
1591 cstring[size - 1] = 0;
1596 memcpy(&cstring[target], buffer, len);
1602 * wrapper around recursive cstring_alloc
1603 * it's the caller's responsibility to free the cstring
1606 cstring_lineFromFile(FILE *f)
1608 return cstring_alloc(f, 0);
1614 c-file-style: "linux"