+/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
- * Copyright (C) 1998 by Erik Andersen <andersee@debian.org>
+ * Copyright (C) tons of folks. Tracking down who wrote what
+ * isn't something I'm going to worry about... If you wrote something
+ * here, please feel free to acknowledge your work.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*/
#include "internal.h"
+#if defined (BB_CHMOD_CHOWN_CHGRP) \
+ || defined (BB_CP_MV) \
+ || defined (BB_FIND) \
+ || defined (BB_LS) \
+ || defined (BB_INSMOD)
+/* same conditions as recursiveAction */
+#define bb_need_name_too_long
+#define bb_need_memory_exhausted
+#endif
+#define BB_DECLARE_EXTERN
+#include "messages.c"
+
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
-//#include <sys/types.h>
-//#include <sys/stat.h>
#include <dirent.h>
#include <time.h>
#include <utime.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <sys/utsname.h> /* for uname(2) */
+
+#if defined BB_FEATURE_MOUNT_LOOP
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <linux/loop.h>
+#endif
+
+/* Busybox mount uses either /proc/filesystems or /dev/mtab to get the
+ * list of available filesystems used for the -t auto option */
+#if defined BB_FEATURE_USE_PROCFS && defined BB_FEATURE_USE_DEVPS_PATCH
+//#error Sorry, but busybox can't use both /proc and /dev/ps at the same time -- Pick one and try again.
+#error "Sorry, but busybox can't use both /proc and /dev/ps at the same time -- Pick one and try again."
+#endif
+
+
+#if defined BB_MOUNT || defined BB_UMOUNT || defined BB_DF
+# if defined BB_FEATURE_USE_PROCFS
+const char mtab_file[] = "/proc/mounts";
+# else
+# if defined BB_MTAB
+const char mtab_file[] = "/etc/mtab";
+# else
+# if defined BB_FEATURE_USE_DEVPS_PATCH
+const char mtab_file[] = "/dev/mtab";
+# else
+# 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)
+# endif
+# endif
+# endif
+#endif
+
+
+extern void usage(const char *usage)
+{
+ fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n",
+ BB_VER, BB_BT);
+ fprintf(stderr, "Usage: %s\n", usage);
+ exit FALSE;
+}
-#if 0
+extern void errorMsg(const char *s, ...)
+{
+ va_list p;
+
+ va_start(p, s);
+ fflush(stdout);
+ vfprintf(stderr, s, p);
+ va_end(p);
+ fflush(stderr);
+}
-extern char *
-join_paths(char * buffer, const char * a, const char * b)
+extern void fatalError(const char *s, ...)
+{
+ va_list p;
+
+ va_start(p, s);
+ fflush(stdout);
+ vfprintf(stderr, s, p);
+ va_end(p);
+ fflush(stderr);
+ exit( FALSE);
+}
+
+#if defined BB_INIT
+/* Returns kernel version encoded as major*65536 + minor*256 + patch,
+ * so, for example, to check if the kernel is greater than 2.2.11:
+ * if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> }
+ */
+extern int get_kernel_revision(void)
{
- int length = 0;
+ struct utsname name;
+ int major = 0, minor = 0, patch = 0;
- if ( a && *a ) {
- length = strlen(a);
- memcpy(buffer, a, length);
+ if (uname(&name) == -1) {
+ perror("cannot get system information");
+ return (0);
}
- if ( b && *b ) {
- if ( length > 0 && buffer[length - 1] != '/' )
- buffer[length++] = '/';
- if ( *b == '/' )
- b++;
- strcpy(&buffer[length], b);
+ sscanf(name.version, "%d.%d.%d", &major, &minor, &patch);
+ return major * 65536 + minor * 256 + patch;
+}
+#endif /* BB_INIT */
+
+#if defined (BB_CP_MV) || defined (BB_DU)
+
+#define HASH_SIZE 311 /* Should be prime */
+#define hash_inode(i) ((i) % HASH_SIZE)
+
+static ino_dev_hashtable_bucket_t *ino_dev_hashtable[HASH_SIZE];
+
+/*
+ * Return 1 if statbuf->st_ino && statbuf->st_dev are recorded in
+ * `ino_dev_hashtable', else return 0
+ *
+ * If NAME is a non-NULL pointer to a character pointer, and there is
+ * a match, then set *NAME to the value of the name slot in that
+ * bucket.
+ */
+int is_in_ino_dev_hashtable(const struct stat *statbuf, char **name)
+{
+ ino_dev_hashtable_bucket_t *bucket;
+
+ bucket = ino_dev_hashtable[hash_inode(statbuf->st_ino)];
+ while (bucket != NULL) {
+ if ((bucket->ino == statbuf->st_ino) &&
+ (bucket->dev == statbuf->st_dev))
+ {
+ if (name) *name = bucket->name;
+ return 1;
+ }
+ bucket = bucket->next;
+ }
+ return 0;
+}
+
+/* Add statbuf to statbuf hash table */
+void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name)
+{
+ int i;
+ size_t s;
+ ino_dev_hashtable_bucket_t *bucket;
+
+ i = hash_inode(statbuf->st_ino);
+ s = name ? strlen(name) : 0;
+ bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + s);
+ bucket->ino = statbuf->st_ino;
+ bucket->dev = statbuf->st_dev;
+ if (name)
+ strcpy(bucket->name, name);
+ else
+ bucket->name[0] = '\0';
+ bucket->next = ino_dev_hashtable[i];
+ ino_dev_hashtable[i] = bucket;
+}
+
+/* Clear statbuf hash table */
+void reset_ino_dev_hashtable(void)
+{
+ int i;
+ ino_dev_hashtable_bucket_t *bucket;
+
+ for (i = 0; i < HASH_SIZE; i++) {
+ while (ino_dev_hashtable[i] != NULL) {
+ bucket = ino_dev_hashtable[i]->next;
+ free(ino_dev_hashtable[i]);
+ ino_dev_hashtable[i] = bucket;
+ }
}
- return buffer;
}
+#endif /* BB_CP_MV || BB_DU */
+
+#if defined (BB_CP_MV) || defined (BB_DU) || defined (BB_LN)
+/*
+ * Return TRUE if a fileName is a directory.
+ * Nonexistant files return FALSE.
+ */
+int isDirectory(const char *fileName, const int followLinks, struct stat *statBuf)
+{
+ int status;
+ int didMalloc = 0;
+
+ if (statBuf == NULL) {
+ statBuf = (struct stat *)xmalloc(sizeof(struct stat));
+ ++didMalloc;
+ }
+
+ if (followLinks == TRUE)
+ status = stat(fileName, statBuf);
+ else
+ status = lstat(fileName, statBuf);
+
+ if (status < 0 || !(S_ISDIR(statBuf->st_mode))) {
+ status = FALSE;
+ }
+ else status = TRUE;
+
+ if (didMalloc) {
+ free(statBuf);
+ statBuf = NULL;
+ }
+ return status;
+}
#endif
+#if defined (BB_CP_MV)
+/*
+ * Copy one file to another, while possibly preserving its modes, times, and
+ * modes. Returns TRUE if successful, or FALSE on a failure with an error
+ * message output. (Failure is not indicated if attributes cannot be set.)
+ * -Erik Andersen
+ */
+int
+copyFile(const char *srcName, const char *destName,
+ int setModes, int followLinks, int forceFlag)
+{
+ int rfd;
+ int wfd;
+ int rcc;
+ int status;
+ char buf[BUF_SIZE];
+ struct stat srcStatBuf;
+ struct stat dstStatBuf;
+ struct utimbuf times;
+
+ if (followLinks == TRUE)
+ status = stat(srcName, &srcStatBuf);
+ else
+ status = lstat(srcName, &srcStatBuf);
+
+ if (status < 0) {
+ perror(srcName);
+ return FALSE;
+ }
+
+ if (followLinks == TRUE)
+ status = stat(destName, &dstStatBuf);
+ else
+ status = lstat(destName, &dstStatBuf);
+
+ if (status < 0 || forceFlag==TRUE) {
+ unlink(destName);
+ dstStatBuf.st_ino = -1;
+ dstStatBuf.st_dev = -1;
+ }
+
+ if ((srcStatBuf.st_dev == dstStatBuf.st_dev) &&
+ (srcStatBuf.st_ino == dstStatBuf.st_ino)) {
+ fprintf(stderr, "Copying file \"%s\" to itself\n", srcName);
+ return FALSE;
+ }
+
+ if (S_ISDIR(srcStatBuf.st_mode)) {
+ //fprintf(stderr, "copying directory %s to %s\n", srcName, destName);
+ /* Make sure the directory is writable */
+ status = mkdir(destName, 0777777 ^ umask(0));
+ if (status < 0 && errno != EEXIST) {
+ perror(destName);
+ return FALSE;
+ }
+ } else if (S_ISLNK(srcStatBuf.st_mode)) {
+ char link_val[BUFSIZ + 1];
+ int link_size;
+
+ //fprintf(stderr, "copying link %s to %s\n", srcName, destName);
+ /* Warning: This could possibly truncate silently, to BUFSIZ chars */
+ link_size = readlink(srcName, &link_val[0], BUFSIZ);
+ if (link_size < 0) {
+ perror(srcName);
+ return FALSE;
+ }
+ link_val[link_size] = '\0';
+ status = symlink(link_val, destName);
+ if (status < 0) {
+ perror(destName);
+ return FALSE;
+ }
+#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
+ if (setModes == TRUE) {
+ /* Try to set owner, but fail silently like GNU cp */
+ lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
+ }
+#endif
+ return TRUE;
+ } else if (S_ISFIFO(srcStatBuf.st_mode)) {
+ //fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
+ if (mkfifo(destName, 0644) < 0) {
+ perror(destName);
+ return FALSE;
+ }
+ } else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode)
+ || S_ISSOCK(srcStatBuf.st_mode)) {
+ //fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName);
+ if (mknod(destName, srcStatBuf.st_mode, srcStatBuf.st_rdev) < 0) {
+ perror(destName);
+ return FALSE;
+ }
+ } else if (S_ISREG(srcStatBuf.st_mode)) {
+ //fprintf(stderr, "copying regular file %s to %s\n", srcName, destName);
+ rfd = open(srcName, O_RDONLY);
+ if (rfd < 0) {
+ perror(srcName);
+ return FALSE;
+ }
+ wfd =
+ open(destName, O_WRONLY | O_CREAT | O_TRUNC,
+ srcStatBuf.st_mode);
+ if (wfd < 0) {
+ perror(destName);
+ close(rfd);
+ return FALSE;
+ }
+ while ((rcc = read(rfd, buf, sizeof(buf))) > 0) {
+ if (fullWrite(wfd, buf, rcc) < 0)
+ goto error_exit;
+ }
+ if (rcc < 0) {
+ goto error_exit;
+ }
+ close(rfd);
+ if (close(wfd) < 0) {
+ return FALSE;
+ }
+ }
+ if (setModes == TRUE) {
+ /* This is fine, since symlinks never get here */
+ if (chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid) < 0) {
+ perror(destName);
+ exit FALSE;
+ }
+ if (chmod(destName, srcStatBuf.st_mode) < 0) {
+ perror(destName);
+ exit FALSE;
+ }
+ times.actime = srcStatBuf.st_atime;
+ times.modtime = srcStatBuf.st_mtime;
+ if (utime(destName, ×) < 0) {
+ perror(destName);
+ exit FALSE;
+ }
+ }
+
+ return TRUE;
+
+ error_exit:
+ perror(destName);
+ close(rfd);
+ close(wfd);
+
+ return FALSE;
+}
+#endif /* BB_CP_MV */
-static CHUNK * chunkList;
+#if defined BB_TAR || defined BB_LS
+
+#define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
+#define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
+
+/* The special bits. If set, display SMODE0/1 instead of MODE0/1 */
+static const mode_t SBIT[] = {
+ 0, 0, S_ISUID,
+ 0, 0, S_ISGID,
+ 0, 0, S_ISVTX
+};
+
+/* The 9 mode bits to test */
+static const mode_t MBIT[] = {
+ S_IRUSR, S_IWUSR, S_IXUSR,
+ S_IRGRP, S_IWGRP, S_IXGRP,
+ S_IROTH, S_IWOTH, S_IXOTH
+};
+
+#define MODE1 "rwxrwxrwx"
+#define MODE0 "---------"
+#define SMODE1 "..s..s..t"
+#define SMODE0 "..S..S..T"
+
/*
* Return the standard ls-like mode string from a file mode.
* This is static and so is overwritten on each call.
*/
-const char *
-modeString(int mode)
-{
- static char buf[12];
-
- strcpy(buf, "----------");
-
- /*
- * Fill in the file type.
- */
- if (S_ISDIR(mode))
- buf[0] = 'd';
- if (S_ISCHR(mode))
- buf[0] = 'c';
- if (S_ISBLK(mode))
- buf[0] = 'b';
- if (S_ISFIFO(mode))
- buf[0] = 'p';
-#ifdef S_ISLNK
- if (S_ISLNK(mode))
- buf[0] = 'l';
-#endif
-#ifdef S_ISSOCK
- if (S_ISSOCK(mode))
- buf[0] = 's';
-#endif
+const char *modeString(int mode)
+{
+ static char buf[12];
- /*
- * Now fill in the normal file permissions.
- */
- if (mode & S_IRUSR)
- buf[1] = 'r';
- if (mode & S_IWUSR)
- buf[2] = 'w';
- if (mode & S_IXUSR)
- buf[3] = 'x';
- if (mode & S_IRGRP)
- buf[4] = 'r';
- if (mode & S_IWGRP)
- buf[5] = 'w';
- if (mode & S_IXGRP)
- buf[6] = 'x';
- if (mode & S_IROTH)
- buf[7] = 'r';
- if (mode & S_IWOTH)
- buf[8] = 'w';
- if (mode & S_IXOTH)
- buf[9] = 'x';
-
- /*
- * Finally fill in magic stuff like suid and sticky text.
- */
- if (mode & S_ISUID)
- buf[3] = ((mode & S_IXUSR) ? 's' : 'S');
- if (mode & S_ISGID)
- buf[6] = ((mode & S_IXGRP) ? 's' : 'S');
- if (mode & S_ISVTX)
- buf[9] = ((mode & S_IXOTH) ? 't' : 'T');
+ int i;
+ buf[0] = TYPECHAR(mode);
+ for (i = 0; i < 9; i++) {
+ if (mode & SBIT[i])
+ buf[i + 1] = (mode & MBIT[i]) ? SMODE1[i] : SMODE0[i];
+ else
+ buf[i + 1] = (mode & MBIT[i]) ? MODE1[i] : MODE0[i];
+ }
return buf;
}
+#endif /* BB_TAR || BB_LS */
+#if defined BB_TAR
/*
- * Return TRUE if a fileName is a directory.
- * Nonexistant files return FALSE.
+ * Return the standard ls-like time string from a time_t
+ * This is static and so is overwritten on each call.
*/
-BOOL
-isDirectory(const char * name)
+const char *timeString(time_t timeVal)
{
- struct stat statBuf;
+ time_t now;
+ char *str;
+ static char buf[26];
- if (stat(name, &statBuf) < 0)
- return FALSE;
+ time(&now);
- return S_ISDIR(statBuf.st_mode);
-}
+ str = ctime(&timeVal);
+ strcpy(buf, &str[4]);
+ buf[12] = '\0';
+ if ((timeVal > now) || (timeVal < now - 365 * 24 * 60 * 60L)) {
+ strcpy(&buf[7], &str[20]);
+ buf[11] = '\0';
+ }
+
+ return buf;
+}
+#endif /* BB_TAR */
+
+#if defined BB_TAR || defined BB_CP_MV
/*
- * Return TRUE if a filename is a block or character device.
- * Nonexistant files return FALSE.
+ * Write all of the supplied buffer out to a file.
+ * This does multiple writes as necessary.
+ * Returns the amount written, or -1 on an error.
*/
-BOOL
-isDevice(const char * name)
+int fullWrite(int fd, const char *buf, int len)
{
- struct stat statBuf;
+ int cc;
+ int total;
- if (stat(name, &statBuf) < 0)
- return FALSE;
+ total = 0;
+
+ while (len > 0) {
+ cc = write(fd, buf, len);
- return S_ISBLK(statBuf.st_mode) || S_ISCHR(statBuf.st_mode);
+ if (cc < 0)
+ return -1;
+
+ buf += cc;
+ total += cc;
+ len -= cc;
+ }
+
+ return total;
}
+#endif /* BB_TAR || BB_CP_MV */
+#if defined BB_TAR || defined BB_TAIL
/*
- * Copy one file to another, while possibly preserving its modes, times,
- * and modes. Returns TRUE if successful, or FALSE on a failure with an
- * error message output. (Failure is not indicted if the attributes cannot
- * be set.)
+ * Read all of the supplied buffer from a file.
+ * This does multiple reads as necessary.
+ * Returns the amount read, or -1 on an error.
+ * A short read is returned on an end of file.
*/
-BOOL
-copyFile(
- const char * srcName,
- const char * destName,
- BOOL setModes
-)
-{
- int rfd;
- int wfd;
- int rcc;
- char buf[BUF_SIZE];
- struct stat statBuf1;
- struct stat statBuf2;
- struct utimbuf times;
-
- if (stat(srcName, &statBuf1) < 0)
- {
- perror(srcName);
+int fullRead(int fd, char *buf, int len)
+{
+ int cc;
+ int total;
- return FALSE;
- }
+ total = 0;
- if (stat(destName, &statBuf2) < 0)
- {
- statBuf2.st_ino = -1;
- statBuf2.st_dev = -1;
- }
+ while (len > 0) {
+ cc = read(fd, buf, len);
- if ((statBuf1.st_dev == statBuf2.st_dev) &&
- (statBuf1.st_ino == statBuf2.st_ino))
- {
- fprintf(stderr, "Copying file \"%s\" to itself\n", srcName);
+ if (cc < 0)
+ return -1;
- return FALSE;
+ if (cc == 0)
+ break;
+
+ buf += cc;
+ total += cc;
+ len -= cc;
}
- rfd = open(srcName, O_RDONLY);
+ return total;
+}
+#endif /* BB_TAR || BB_TAIL */
- if (rfd < 0)
- {
- perror(srcName);
- return FALSE;
- }
+#if defined (BB_CHMOD_CHOWN_CHGRP) \
+ || defined (BB_CP_MV) \
+ || defined (BB_FIND) \
+ || defined (BB_INSMOD) \
+ || defined (BB_RM) \
+ || defined (BB_TAR)
- wfd = creat(destName, statBuf1.st_mode);
+/*
+ * Walk down all the directories under the specified
+ * location, and do something (something specified
+ * by the fileAction and dirAction function pointers).
+ *
+ * Unfortunatly, while nftw(3) could replace this and reduce
+ * code size a bit, nftw() wasn't supported before GNU libc 2.1,
+ * and so isn't sufficiently portable to take over since glibc2.1
+ * is so stinking huge.
+ */
+int recursiveAction(const char *fileName,
+ int recurse, int followLinks, int depthFirst,
+ int (*fileAction) (const char *fileName,
+ struct stat * statbuf,
+ void* userData),
+ int (*dirAction) (const char *fileName,
+ struct stat * statbuf,
+ void* userData),
+ void* userData)
+{
+ int status;
+ struct stat statbuf;
+ struct dirent *next;
- if (wfd < 0)
- {
- perror(destName);
- close(rfd);
+ if (followLinks == TRUE)
+ status = stat(fileName, &statbuf);
+ else
+ status = lstat(fileName, &statbuf);
+ if (status < 0) {
+#ifdef BB_DEBUG_PRINT_SCAFFOLD
+ fprintf(stderr,
+ "status=%d followLinks=%d TRUE=%d\n",
+ status, followLinks, TRUE);
+#endif
+ perror(fileName);
return FALSE;
}
- while ((rcc = read(rfd, buf, sizeof(buf))) > 0)
- {
- if (fullWrite(wfd, buf, rcc) < 0)
- goto error_exit;
+ if ((followLinks == FALSE) && (S_ISLNK(statbuf.st_mode))) {
+ if (fileAction == NULL)
+ return TRUE;
+ else
+ return fileAction(fileName, &statbuf, userData);
}
- if (rcc < 0)
- {
- perror(srcName);
- goto error_exit;
+ if (recurse == FALSE) {
+ if (S_ISDIR(statbuf.st_mode)) {
+ if (dirAction != NULL)
+ return (dirAction(fileName, &statbuf, userData));
+ else
+ return TRUE;
+ }
}
- (void) close(rfd);
+ if (S_ISDIR(statbuf.st_mode)) {
+ DIR *dir;
- if (close(wfd) < 0)
- {
- perror(destName);
-
- return FALSE;
+ dir = opendir(fileName);
+ if (!dir) {
+ perror(fileName);
+ return FALSE;
+ }
+ if (dirAction != NULL && depthFirst == FALSE) {
+ status = dirAction(fileName, &statbuf, userData);
+ if (status == FALSE) {
+ perror(fileName);
+ return FALSE;
+ }
+ }
+ while ((next = readdir(dir)) != NULL) {
+ char nextFile[BUFSIZ + 1];
+
+ if ((strcmp(next->d_name, "..") == 0)
+ || (strcmp(next->d_name, ".") == 0)) {
+ continue;
+ }
+ if (strlen(fileName) + strlen(next->d_name) + 1 > BUFSIZ) {
+ fprintf(stderr, name_too_long, "ftw");
+ return FALSE;
+ }
+ memset(nextFile, 0, sizeof(nextFile));
+ sprintf(nextFile, "%s/%s", fileName, next->d_name);
+ status =
+ recursiveAction(nextFile, TRUE, followLinks, depthFirst,
+ fileAction, dirAction, userData);
+ if (status < 0) {
+ closedir(dir);
+ return FALSE;
+ }
+ }
+ status = closedir(dir);
+ if (status < 0) {
+ perror(fileName);
+ return FALSE;
+ }
+ if (dirAction != NULL && depthFirst == TRUE) {
+ status = dirAction(fileName, &statbuf, userData);
+ if (status == FALSE) {
+ perror(fileName);
+ return FALSE;
+ }
+ }
+ } else {
+ if (fileAction == NULL)
+ return TRUE;
+ else
+ return fileAction(fileName, &statbuf, userData);
}
+ return TRUE;
+}
- if (setModes)
- {
- (void) chmod(destName, statBuf1.st_mode);
+#endif /* BB_CHMOD_CHOWN_CHGRP || BB_CP_MV || BB_FIND || BB_LS || BB_INSMOD */
- (void) chown(destName, statBuf1.st_uid, statBuf1.st_gid);
- times.actime = statBuf1.st_atime;
- times.modtime = statBuf1.st_mtime;
- (void) utime(destName, ×);
+#if defined (BB_TAR) || defined (BB_MKDIR)
+/*
+ * Attempt to create the directories along the specified path, except for
+ * the final component. The mode is given for the final directory only,
+ * while all previous ones get default protections. Errors are not reported
+ * here, as failures to restore files can be reported later.
+ */
+extern int createPath(const char *name, int mode)
+{
+ char *cp;
+ char *cpOld;
+ char buf[BUFSIZ + 1];
+ int retVal = 0;
+
+ strcpy(buf, name);
+ for (cp = buf; *cp == '/'; cp++);
+ cp = strchr(cp, '/');
+ while (cp) {
+ cpOld = cp;
+ cp = strchr(cp + 1, '/');
+ *cpOld = '\0';
+ retVal = mkdir(buf, cp ? 0777 : mode);
+ if (retVal != 0 && errno != EEXIST) {
+ perror(buf);
+ return FALSE;
+ }
+ *cpOld = '/';
}
-
return TRUE;
+}
+#endif /* BB_TAR || BB_MKDIR */
-error_exit:
- close(rfd);
- close(wfd);
- return FALSE;
+#if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_MKDIR)
+/* [ugoa]{+|-|=}[rwxst] */
+
+
+
+extern int parse_mode(const char *s, mode_t * theMode)
+{
+ mode_t andMode =
+
+ S_ISVTX | S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
+ mode_t orMode = 0;
+ mode_t mode = 0;
+ mode_t groups = 0;
+ char type;
+ char c;
+
+ do {
+ for (;;) {
+ switch (c = *s++) {
+ case '\0':
+ return -1;
+ case 'u':
+ groups |= S_ISUID | S_IRWXU;
+ continue;
+ case 'g':
+ groups |= S_ISGID | S_IRWXG;
+ continue;
+ case 'o':
+ groups |= S_IRWXO;
+ continue;
+ case 'a':
+ groups |= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
+ continue;
+ case '+':
+ case '=':
+ case '-':
+ type = c;
+ if (groups == 0) /* The default is "all" */
+ groups |=
+ S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
+ break;
+ default:
+ if (isdigit(c) && c >= '0' && c <= '7' &&
+ mode == 0 && groups == 0) {
+ *theMode = strtol(--s, NULL, 8);
+ return (TRUE);
+ } else
+ return (FALSE);
+ }
+ break;
+ }
+
+ while ((c = *s++) != '\0') {
+ switch (c) {
+ case ',':
+ break;
+ case 'r':
+ mode |= S_IRUSR | S_IRGRP | S_IROTH;
+ continue;
+ case 'w':
+ mode |= S_IWUSR | S_IWGRP | S_IWOTH;
+ continue;
+ case 'x':
+ mode |= S_IXUSR | S_IXGRP | S_IXOTH;
+ continue;
+ case 's':
+ mode |= S_IXGRP | S_ISUID | S_ISGID;
+ continue;
+ case 't':
+ mode |= 0;
+ continue;
+ default:
+ *theMode &= andMode;
+ *theMode |= orMode;
+ return (TRUE);
+ }
+ break;
+ }
+ switch (type) {
+ case '=':
+ andMode &= ~(groups);
+ /* fall through */
+ case '+':
+ orMode |= mode & groups;
+ break;
+ case '-':
+ andMode &= ~(mode & groups);
+ orMode &= andMode;
+ break;
+ }
+ } while (c == ',');
+ *theMode &= andMode;
+ *theMode |= orMode;
+ return (TRUE);
}
-/*
- * Build a path name from the specified directory name and file name.
- * If the directory name is NULL, then the original fileName is returned.
- * The built path is in a static area, and is overwritten for each call.
+#endif /* BB_CHMOD_CHOWN_CHGRP || BB_MKDIR */
+
+
+
+
+
+#if defined BB_CHMOD_CHOWN_CHGRP || defined BB_PS || defined BB_LS || defined BB_TAR || defined BB_ID
+
+/* This parses entries in /etc/passwd and /etc/group. This is desirable
+ * for BusyBox, since we want to avoid using the glibc NSS stuff, which
+ * increases target size and is often not needed or wanted for embedded
+ * systems.
+ *
+ * /etc/passwd entries look like this:
+ * root:x:0:0:root:/root:/bin/bash
+ * and /etc/group entries look like this:
+ * root:x:0:
+ *
+ * This uses buf as storage to hold things.
+ *
*/
-const char *
-buildName(const char * dirName, const char * fileName)
+unsigned long my_getid(const char *filename, char *name, unsigned long id, unsigned long *gid)
{
- const char * cp;
- static char buf[PATH_LEN];
+ FILE *file;
+ char *rname, *start, *end, buf[128];
+ unsigned long rid;
+ unsigned long rgid = 0;
+
+ file = fopen(filename, "r");
+ if (file == NULL) {
+ /* Do not complain. It is ok for /etc/passwd and
+ * friends to be missing... */
+ return (-1);
+ }
- if ((dirName == NULL) || (*dirName == '\0'))
- return fileName;
+ while (fgets(buf, 128, file) != NULL) {
+ if (buf[0] == '#')
+ continue;
+
+ /* username/group name */
+ start = buf;
+ end = strchr(start, ':');
+ if (end == NULL)
+ continue;
+ *end = '\0';
+ rname = start;
+
+ /* password */
+ start = end + 1;
+ end = strchr(start, ':');
+ if (end == NULL)
+ continue;
+
+ /* uid in passwd, gid in group */
+ start = end + 1;
+ rid = (unsigned long) strtol(start, &end, 10);
+ if (end == start)
+ continue;
+
+ /* gid in passwd */
+ start = end + 1;
+ rgid = (unsigned long) strtol(start, &end, 10);
+
+ if (name) {
+ if (0 == strcmp(rname, name)) {
+ if (gid) *gid = rgid;
+ fclose(file);
+ return (rid);
+ }
+ }
+ if (id != -1 && id == rid) {
+ strncpy(name, rname, 8);
+ if (gid) *gid = rgid;
+ fclose(file);
+ return (TRUE);
+ }
+ }
+ fclose(file);
+ return (-1);
+}
- cp = strrchr(fileName, '/');
+/* returns a uid given a username */
+unsigned long my_getpwnam(char *name)
+{
+ return my_getid("/etc/passwd", name, -1, NULL);
+}
- if (cp)
- fileName = cp + 1;
+/* returns a gid given a group name */
+unsigned long my_getgrnam(char *name)
+{
+ return my_getid("/etc/group", name, -1, NULL);
+}
- strcpy(buf, dirName);
- strcat(buf, "/");
- strcat(buf, fileName);
+/* gets a username given a uid */
+void my_getpwuid(char *name, unsigned long uid)
+{
+ my_getid("/etc/passwd", name, uid, NULL);
+}
- return buf;
+/* gets a groupname given a gid */
+void my_getgrgid(char *group, unsigned long gid)
+{
+ my_getid("/etc/group", group, gid, NULL);
+}
+
+/* gets a gid given a user name */
+unsigned long my_getpwnamegid(char *name)
+{
+ unsigned long gid;
+ my_getid("/etc/passwd", name, -1, &gid);
+ return gid;
+}
+
+#endif /* BB_CHMOD_CHOWN_CHGRP || BB_PS || BB_LS || BB_TAR || BB_ID */
+
+
+#if (defined BB_CHVT) || (defined BB_DEALLOCVT)
+
+
+#include <linux/kd.h>
+#include <sys/ioctl.h>
+
+int is_a_console(int fd)
+{
+ char arg;
+
+ arg = 0;
+ return (ioctl(fd, KDGKBTYPE, &arg) == 0
+ && ((arg == KB_101) || (arg == KB_84)));
}
+static int open_a_console(char *fnam)
+{
+ int fd;
+
+ /* try read-only */
+ fd = open(fnam, O_RDWR);
+
+ /* if failed, try read-only */
+ if (fd < 0 && errno == EACCES)
+ fd = open(fnam, O_RDONLY);
+ /* if failed, try write-only */
+ if (fd < 0 && errno == EACCES)
+ fd = open(fnam, O_WRONLY);
+
+ /* if failed, fail */
+ if (fd < 0)
+ return -1;
+
+ /* if not a console, fail */
+ if (!is_a_console(fd)) {
+ close(fd);
+ return -1;
+ }
+
+ /* success */
+ return fd;
+}
/*
- * Make a NULL-terminated string out of an argc, argv pair.
- * Returns TRUE if successful, or FALSE if the string is too long,
- * with an error message given. This does not handle spaces within
- * arguments correctly.
+ * Get an fd for use with kbd/console ioctls.
+ * We try several things because opening /dev/console will fail
+ * if someone else used X (which does a chown on /dev/console).
+ *
+ * if tty_name is non-NULL, try this one instead.
*/
-BOOL
-makeString(
- int argc,
- const char ** argv,
- char * buf,
- int bufLen
-)
+
+int get_console_fd(char *tty_name)
{
- int len;
+ int fd;
- while (argc-- > 0)
- {
- len = strlen(*argv);
+ if (tty_name) {
+ if (-1 == (fd = open_a_console(tty_name)))
+ return -1;
+ else
+ return fd;
+ }
- if (len >= bufLen)
- {
- fprintf(stderr, "Argument string too long\n");
+ fd = open_a_console("/dev/tty");
+ if (fd >= 0)
+ return fd;
+
+ fd = open_a_console("/dev/tty0");
+ if (fd >= 0)
+ return fd;
+
+ fd = open_a_console("/dev/console");
+ if (fd >= 0)
+ return fd;
+
+ for (fd = 0; fd < 3; fd++)
+ if (is_a_console(fd))
+ return fd;
+
+ fprintf(stderr,
+ "Couldnt get a file descriptor referring to the console\n");
+ return -1; /* total failure */
+}
- return FALSE;
- }
- strcpy(buf, *argv++);
+#endif /* BB_CHVT || BB_DEALLOCVT */
- buf += len;
- bufLen -= len;
- if (argc)
- *buf++ = ' ';
+#if !defined BB_REGEXP && (defined BB_GREP || defined BB_SED)
- bufLen--;
+/* Do a case insensitive strstr() */
+char *stristr(char *haystack, const char *needle)
+{
+ int len = strlen(needle);
+
+ while (*haystack) {
+ if (!strncasecmp(haystack, needle, len))
+ break;
+ haystack++;
}
- *buf = '\0';
+ if (!(*haystack))
+ haystack = NULL;
- return TRUE;
+ return haystack;
}
-
-/*
- * Allocate a chunk of memory (like malloc).
- * The difference, though, is that the memory allocated is put on a
- * list of chunks which can be freed all at one time. You CAN NOT free
- * an individual chunk.
+/* This tries to find a needle in a haystack, but does so by
+ * only trying to match literal strings (look 'ma, no regexps!)
+ * This is short, sweet, and carries _very_ little baggage,
+ * unlike its beefier cousin in regexp.c
+ * -Erik Andersen
*/
-char *
-getChunk(int size)
+extern int find_match(char *haystack, char *needle, int ignoreCase)
{
- CHUNK * chunk;
- if (size < CHUNK_INIT_SIZE)
- size = CHUNK_INIT_SIZE;
+ if (ignoreCase == FALSE)
+ haystack = strstr(haystack, needle);
+ else
+ haystack = stristr(haystack, needle);
+ if (haystack == NULL)
+ return FALSE;
+ return TRUE;
+}
- chunk = (CHUNK *) malloc(size + sizeof(CHUNK) - CHUNK_INIT_SIZE);
- if (chunk == NULL)
- return NULL;
+/* This performs substitutions after a string match has been found. */
+extern int replace_match(char *haystack, char *needle, char *newNeedle,
+ int ignoreCase)
+{
+ int foundOne = 0;
+ char *where, *slider, *slider1, *oldhayStack;
- chunk->next = chunkList;
- chunkList = chunk;
+ if (ignoreCase == FALSE)
+ where = strstr(haystack, needle);
+ else
+ where = stristr(haystack, needle);
- return chunk->data;
+ if (strcmp(needle, newNeedle) == 0)
+ return FALSE;
+
+ oldhayStack = (char *) xmalloc((unsigned) (strlen(haystack)));
+ while (where != NULL) {
+ foundOne++;
+ strcpy(oldhayStack, haystack);
+ for (slider = haystack, slider1 = oldhayStack; slider != where;
+ slider++, slider1++);
+ *slider = 0;
+ haystack = strcat(haystack, newNeedle);
+ slider1 += strlen(needle);
+ haystack = strcat(haystack, slider1);
+ where = strstr(slider, needle);
+ }
+ free(oldhayStack);
+
+ if (foundOne > 0)
+ return TRUE;
+ else
+ return FALSE;
}
+#endif /* ! BB_REGEXP && (BB_GREP || BB_SED) */
+
+#if defined BB_FIND
/*
- * Duplicate a string value using the chunk allocator.
- * The returned string cannot be individually freed, but can only be freed
- * with other strings when freeChunks is called. Returns NULL on failure.
+ * Routine to see if a text string is matched by a wildcard pattern.
+ * Returns TRUE if the text is matched, or FALSE if it is not matched
+ * or if the pattern is invalid.
+ * * matches zero or more characters
+ * ? matches a single character
+ * [abc] matches 'a', 'b' or 'c'
+ * \c quotes character c
+ * Adapted from code written by Ingo Wilken, and
+ * then taken from sash, Copyright (c) 1999 by David I. Bell
+ * Permission is granted to use, distribute, or modify this source,
+ * provided that this copyright notice remains intact.
+ * Permission to distribute this code under the GPL has been granted.
*/
-char *
-chunkstrdup(const char * str)
+extern int check_wildcard_match(const char *text, const char *pattern)
{
- int len;
- char * newStr;
+ const char *retryPat;
+ const char *retryText;
+ int ch;
+ int found;
+ int len;
+
+ retryPat = NULL;
+ retryText = NULL;
+
+ while (*text || *pattern) {
+ ch = *pattern++;
+
+ switch (ch) {
+ case '*':
+ retryPat = pattern;
+ retryText = text;
+ break;
+
+ case '[':
+ found = FALSE;
+
+ while ((ch = *pattern++) != ']') {
+ if (ch == '\\')
+ ch = *pattern++;
+
+ if (ch == '\0')
+ return FALSE;
+
+ if (*text == ch)
+ found = TRUE;
+ }
+ len=strlen(text);
+ if (found == FALSE && len!=0) {
+ return FALSE;
+ }
+ if (found == TRUE) {
+ if (strlen(pattern)==0 && len==1) {
+ return TRUE;
+ }
+ if (len!=0) {
+ text++;
+ continue;
+ }
+ }
+
+ /* fall into next case */
+
+ case '?':
+ if (*text++ == '\0')
+ return FALSE;
+
+ break;
+
+ case '\\':
+ ch = *pattern++;
+
+ if (ch == '\0')
+ return FALSE;
- len = strlen(str) + 1;
- newStr = getChunk(len);
+ /* fall into next case */
- if (newStr)
- memcpy(newStr, str, len);
+ default:
+ if (*text == ch) {
+ if (*text)
+ text++;
+ break;
+ }
- return newStr;
+ if (*text) {
+ pattern = retryPat;
+ text = ++retryText;
+ break;
+ }
+
+ return FALSE;
+ }
+
+ if (pattern == NULL)
+ return FALSE;
+ }
+
+ return TRUE;
}
+#endif /* BB_FIND */
+
+
+#if defined BB_DF || defined BB_MTAB
/*
- * Free all chunks of memory that had been allocated since the last
- * call to this routine.
+ * Given a block device, find the mount table entry if that block device
+ * is mounted.
+ *
+ * Given any other file (or directory), find the mount table entry for its
+ * filesystem.
*/
-void
-freeChunks(void)
+extern struct mntent *findMountPoint(const char *name, const char *table)
{
- CHUNK * chunk;
+ struct stat s;
+ dev_t mountDevice;
+ FILE *mountTable;
+ struct mntent *mountEntry;
+
+ if (stat(name, &s) != 0)
+ return 0;
+
+ if ((s.st_mode & S_IFMT) == S_IFBLK)
+ mountDevice = s.st_rdev;
+ else
+ mountDevice = s.st_dev;
- while (chunkList)
- {
- chunk = chunkList;
- chunkList = chunk->next;
- free((char *) chunk);
+
+ if ((mountTable = setmntent(table, "r")) == 0)
+ return 0;
+
+ while ((mountEntry = getmntent(mountTable)) != 0) {
+ if (strcmp(name, mountEntry->mnt_dir) == 0
+ || strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */
+ break;
+ if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */
+ break;
+ if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */
+ break;
}
+ endmntent(mountTable);
+ return mountEntry;
}
+#endif /* BB_DF || BB_MTAB */
+
+#if defined BB_DD || defined BB_TAIL
/*
- * Write all of the supplied buffer out to a file.
- * This does multiple writes as necessary.
- * Returns the amount written, or -1 on an error.
+ * Read a number with a possible multiplier.
+ * Returns -1 if the number format is illegal.
*/
-int
-fullWrite(int fd, const char * buf, int len)
+extern long getNum(const char *cp)
{
- int cc;
- int total;
+ long value;
- total = 0;
+ if (!isDecimal(*cp))
+ return -1;
- while (len > 0)
- {
- cc = write(fd, buf, len);
+ value = 0;
- if (cc < 0)
- return -1;
+ while (isDecimal(*cp))
+ value = value * 10 + *cp++ - '0';
- buf += cc;
- total+= cc;
- len -= cc;
+ switch (*cp++) {
+ case 'M':
+ case 'm': /* `tail' uses it traditionally */
+ value *= 1048576;
+ break;
+
+ case 'k':
+ value *= 1024;
+ break;
+
+ case 'b':
+ value *= 512;
+ break;
+
+ case 'w':
+ value *= 2;
+ break;
+
+ case '\0':
+ return value;
+
+ default:
+ return -1;
}
- return total;
+ if (*cp)
+ return -1;
+
+ return value;
}
+#endif /* BB_DD || BB_TAIL */
-/*
- * Read all of the supplied buffer from a file.
- * This does multiple reads as necessary.
- * Returns the amount read, or -1 on an error.
- * A short read is returned on an end of file.
+#if defined BB_INIT || defined BB_SYSLOGD
+/* try to open up the specified device */
+extern int device_open(char *device, int mode)
+{
+ int m, f, fd = -1;
+
+ m = mode | O_NONBLOCK;
+
+ /* Retry up to 5 times */
+ for (f = 0; f < 5; f++)
+ if ((fd = open(device, m, 0600)) >= 0)
+ break;
+ if (fd < 0)
+ return fd;
+ /* Reset original flags. */
+ if (m != mode)
+ fcntl(fd, F_SETFL, mode);
+ return fd;
+}
+#endif /* BB_INIT BB_SYSLOGD */
+
+
+#if defined BB_KILLALL || ( defined BB_FEATURE_LINUXRC && ( defined BB_HALT || defined BB_REBOOT || defined BB_POWEROFF ))
+#ifdef BB_FEATURE_USE_DEVPS_PATCH
+#include <linux/devps.h>
+#endif
+
+#if defined BB_FEATURE_USE_DEVPS_PATCH
+/* findPidByName()
+ *
+ * This finds the pid of the specified process,
+ * by using the /dev/ps device driver.
+ *
+ * Returns a list of all matching PIDs
*/
-int
-fullRead(int fd, char * buf, int len)
+extern pid_t* findPidByName( char* pidName)
{
- int cc;
- int total;
+ int fd, i, j;
+ char device[] = "/dev/ps";
+ pid_t num_pids;
+ pid_t* pid_array = NULL;
+ pid_t* pidList=NULL;
+
+ /* open device */
+ fd = open(device, O_RDONLY);
+ if (fd < 0)
+ fatalError( "open failed for `%s': %s\n", device, strerror (errno));
+
+ /* Find out how many processes there are */
+ if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0)
+ fatalError( "\nDEVPS_GET_PID_LIST: %s\n", strerror (errno));
+
+ /* Allocate some memory -- grab a few extras just in case
+ * some new processes start up while we wait. The kernel will
+ * just ignore any extras if we give it too many, and will trunc.
+ * the list if we give it too few. */
+ pid_array = (pid_t*) calloc( num_pids+10, sizeof(pid_t));
+ pid_array[0] = num_pids+10;
+
+ /* Now grab the pid list */
+ if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0)
+ fatalError( "\nDEVPS_GET_PID_LIST: %s\n", strerror (errno));
+
+ /* Now search for a match */
+ for (i=1; i<pid_array[0] ; i++) {
+ char* p;
+ struct pid_info info;
+
+ info.pid = pid_array[i];
+ if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0)
+ fatalError( "\nDEVPS_GET_PID_INFO: %s\n", strerror (errno));
+
+ /* Make sure we only match on the process name */
+ p=info.command_line+1;
+ while ((*p != 0) && !isspace(*(p)) && (*(p-1) != '\\')) {
+ (p)++;
+ }
+ if (isspace(*(p)))
+ *p='\0';
+
+ if ((strstr(info.command_line, pidName) != NULL)
+ && (strlen(pidName) == strlen(info.command_line))) {
+ pidList=realloc( pidList, sizeof(pid_t) * (j+2));
+ if (pidList==NULL)
+ fatalError(memory_exhausted, "");
+ pidList[j++]=info.pid;
+ }
+ }
+ if (pidList)
+ pidList[j]=0;
- total = 0;
+ /* Free memory */
+ free( pid_array);
- while (len > 0)
- {
- cc = read(fd, buf, len);
+ /* close device */
+ if (close (fd) != 0)
+ fatalError( "close failed for `%s': %s\n",device, strerror (errno));
- if (cc < 0)
- return -1;
+ return pidList;
+}
+#else /* BB_FEATURE_USE_DEVPS_PATCH */
+#if ! defined BB_FEATURE_USE_PROCFS
+#error Sorry, I depend on the /proc filesystem right now.
+#endif
- if (cc == 0)
- break;
+/* findPidByName()
+ *
+ * This finds the pid of the specified process.
+ * Currently, it's implemented by rummaging through
+ * the proc filesystem.
+ *
+ * Returns a list of all matching PIDs
+ */
+extern pid_t* findPidByName( char* pidName)
+{
+ DIR *dir;
+ struct dirent *next;
+ pid_t* pidList=NULL;
+ int i=0;
- buf += cc;
- total+= cc;
- len -= cc;
+ dir = opendir("/proc");
+ if (!dir)
+ fatalError( "Cannot open /proc: %s\n", strerror (errno));
+
+ while ((next = readdir(dir)) != NULL) {
+ FILE *status;
+ char filename[256];
+ char buffer[256];
+ char* p;
+
+ /* If it isn't a number, we don't want it */
+ if (!isdigit(*next->d_name))
+ continue;
+
+ /* Now open the status file */
+ sprintf(filename, "/proc/%s/status", next->d_name);
+ status = fopen(filename, "r");
+ if (!status) {
+ continue;
+ }
+ fgets(buffer, 256, status);
+ fclose(status);
+
+ /* Make sure we only match on the process name */
+ p=buffer+5; /* Skip the name */
+ while ((p)++) {
+ if (*p==0 || *p=='\n') {
+ *p='\0';
+ break;
+ }
+ }
+ p=buffer+6; /* Skip the "Name:\t" */
+
+ if ((strstr(p, pidName) != NULL)
+ && (strlen(pidName) == strlen(p))) {
+ pidList=realloc( pidList, sizeof(pid_t) * (i+2));
+ if (pidList==NULL)
+ fatalError(memory_exhausted, "");
+ pidList[i++]=strtol(next->d_name, NULL, 0);
+ }
}
+ if (pidList)
+ pidList[i]=0;
+ return pidList;
+}
+#endif /* BB_FEATURE_USE_DEVPS_PATCH */
+#endif /* BB_KILLALL || ( BB_FEATURE_LINUXRC && ( BB_HALT || BB_REBOOT || BB_POWEROFF )) */
- return total;
+/* this should really be farmed out to libbusybox.a */
+extern void *xmalloc(size_t size)
+{
+ void *cp = malloc(size);
+
+ if (cp == NULL)
+ fatalError(memory_exhausted, "");
+ return cp;
}
+#if (__GLIBC__ < 2) && (defined BB_SYSLOGD || defined BB_INIT)
+extern int vdprintf(int d, const char *format, va_list ap)
+{
+ char buf[BUF_SIZE];
+ int len;
-/*
- * Walk down all the directories under the specified
- * location, and do something (something specified
- * by the fileAction and dirAction function pointers).
- */
-int
-recursiveAction( const char *fileName, BOOL followLinks,
- int (*fileAction)(const char* fileName),
- int (*dirAction)(const char* fileName))
+ len = vsprintf(buf, format, ap);
+ return write(d, buf, len);
+}
+#endif /* BB_SYSLOGD */
+
+#if defined BB_FEATURE_MOUNT_LOOP
+extern int del_loop(const char *device)
{
- int status;
- struct stat statbuf;
- struct dirent* next;
+ int fd;
- if (followLinks)
- status = stat(fileName, &statbuf);
- else
- status = lstat(fileName, &statbuf);
+ if ((fd = open(device, O_RDONLY)) < 0) {
+ perror(device);
+ return (FALSE);
+ }
+ if (ioctl(fd, LOOP_CLR_FD, 0) < 0) {
+ perror("ioctl: LOOP_CLR_FD");
+ return (FALSE);
+ }
+ close(fd);
+ return (TRUE);
+}
- if (status < 0) {
- perror(fileName);
- return( FALSE);
- }
+extern int set_loop(const char *device, const char *file, int offset,
+ int *loopro)
+{
+ struct loop_info loopinfo;
+ int fd, ffd, mode;
+
+ mode = *loopro ? O_RDONLY : O_RDWR;
+ if ((ffd = open(file, mode)) < 0 && !*loopro
+ && (errno != EROFS || (ffd = open(file, mode = O_RDONLY)) < 0)) {
+ perror(file);
+ return 1;
+ }
+ if ((fd = open(device, mode)) < 0) {
+ close(ffd);
+ perror(device);
+ return 1;
+ }
+ *loopro = (mode == O_RDONLY);
+
+ memset(&loopinfo, 0, sizeof(loopinfo));
+ strncpy(loopinfo.lo_name, file, LO_NAME_SIZE);
+ loopinfo.lo_name[LO_NAME_SIZE - 1] = 0;
+
+ loopinfo.lo_offset = offset;
+
+ loopinfo.lo_encrypt_key_size = 0;
+ if (ioctl(fd, LOOP_SET_FD, ffd) < 0) {
+ perror("ioctl: LOOP_SET_FD");
+ close(fd);
+ close(ffd);
+ return 1;
+ }
+ if (ioctl(fd, LOOP_SET_STATUS, &loopinfo) < 0) {
+ (void) ioctl(fd, LOOP_CLR_FD, 0);
+ perror("ioctl: LOOP_SET_STATUS");
+ close(fd);
+ close(ffd);
+ return 1;
+ }
+ close(fd);
+ close(ffd);
+ return 0;
+}
- if (S_ISDIR(statbuf.st_mode)) {
+extern char *find_unused_loop_device(void)
+{
+ char dev[20];
+ int i, fd;
+ struct stat statbuf;
+ struct loop_info loopinfo;
+
+ for (i = 0; i <= 7; i++) {
+ sprintf(dev, "/dev/loop%d", i);
+ if (stat(dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) {
+ if ((fd = open(dev, O_RDONLY)) >= 0) {
+ if (ioctl(fd, LOOP_GET_STATUS, &loopinfo) == -1) {
+ if (errno == ENXIO) { /* probably free */
+ close(fd);
+ return strdup(dev);
+ }
+ }
+ close(fd);
+ }
+ }
+ }
+ return NULL;
+}
+#endif /* BB_FEATURE_MOUNT_LOOP */
+
+#if defined BB_MOUNT || defined BB_DF || ( defined BB_UMOUNT && ! defined BB_MTAB)
+extern int find_real_root_device_name(char* name)
+{
DIR *dir;
- dir = opendir(fileName);
+ struct dirent *entry;
+ struct stat statBuf, rootStat;
+ char fileName[BUFSIZ];
+
+ if (stat("/", &rootStat) != 0) {
+ errorMsg("could not stat '/'\n");
+ return( FALSE);
+ }
+
+ dir = opendir("/dev");
if (!dir) {
- perror(fileName);
- return(FALSE);
+ errorMsg("could not open '/dev'\n");
+ return( FALSE);
}
- while ((next = readdir (dir)) != NULL) {
- char nextFile[NAME_MAX];
- if ( (strcmp(next->d_name, "..") == 0) || (strcmp(next->d_name, ".") == 0) ) {
- continue;
- }
- sprintf(nextFile, "%s/%s", fileName, next->d_name);
- status = recursiveAction(nextFile, followLinks, fileAction, dirAction);
- if (status < 0) {
- closedir(dir);
- return(FALSE);
+
+ while((entry = readdir(dir)) != NULL) {
+
+ /* Must skip ".." since that is "/", and so we
+ * would get a false positive on ".." */
+ if (strcmp(entry->d_name, "..") == 0)
+ continue;
+
+ sprintf( fileName, "/dev/%s", entry->d_name);
+
+ if (stat(fileName, &statBuf) != 0)
+ continue;
+ /* Some char devices have the same dev_t as block
+ * devices, so make sure this is a block device */
+ if (! S_ISBLK(statBuf.st_mode))
+ continue;
+ if (statBuf.st_rdev == rootStat.st_rdev) {
+ strcpy(name, fileName);
+ return ( TRUE);
}
}
- status = closedir (dir);
- if (status < 0) {
- perror(fileName);
- return( FALSE);
- }
- if (dirAction==NULL)
- return(TRUE);
- else
- return(dirAction(fileName));
+
+ return( FALSE);
+}
+#endif
+
+const unsigned int CSTRING_BUFFER_LENGTH = 128;
+/* recursive parser that returns cstrings of arbitrary length
+ * from a FILE*
+ */
+static char *
+cstring_alloc(FILE* f, int depth)
+{
+ char *cstring;
+ char buffer[CSTRING_BUFFER_LENGTH];
+ int target = CSTRING_BUFFER_LENGTH * depth;
+ int c, i, len, size;
+
+ /* fill buffer */
+ i = 0;
+ while ((c = fgetc(f)) != EOF) {
+ buffer[i] = (char) c;
+ if (buffer[i++] == 0x0a) { break; }
+ if (i == CSTRING_BUFFER_LENGTH) { break; }
}
- else {
- if (fileAction==NULL)
- return(TRUE);
- else
- return(fileAction(fileName));
+ len = i;
+
+ /* recurse or malloc? */
+ if (len == CSTRING_BUFFER_LENGTH) {
+ cstring = cstring_alloc(f, (depth + 1));
+ } else {
+ /* [special case] EOF */
+ if ((depth | len) == 0) { return NULL; }
+
+ /* malloc */
+ size = target + len + 1;
+ cstring = malloc(size);
+ if (!cstring) { return NULL; }
+ cstring[size - 1] = 0;
}
-}
+ /* copy buffer */
+ if (cstring) {
+ memcpy(&cstring[target], buffer, len);
+ }
+ return cstring;
+}
+/*
+ * wrapper around recursive cstring_alloc
+ * it's the caller's responsibility to free the cstring
+ */
+char *
+cstring_lineFromFile(FILE *f)
+{
+ return cstring_alloc(f, 0);
+}
/* END CODE */
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
projects / oweals / busybox.git / blobdiff