/*
* 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 <utime.h>
#include <sys/stat.h>
#include <unistd.h>
+#include <ctype.h>
+
+#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
+# error With (BB_MOUNT||BB_UMOUNT||BB_DF) defined, you must define either BB_MTAB or BB_FEATURE_USE_PROCFS
+# 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 defined (BB_INIT) || defined (BB_PS)
+
+#if ! defined BB_FEATURE_USE_PROCFS
+#error Sorry, I depend on the /proc filesystem right now.
+#endif
+/* 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> }
+ */
+int
+get_kernel_revision()
+{
+ FILE *file;
+ int major=0, minor=0, patch=0;
+ char* filename="/proc/sys/kernel/osrelease";
+
+ file = fopen(filename,"r");
+ if (file == NULL) {
+ /* bummer, /proc must not be mounted... */
+ return( 0);
+ }
+ fscanf(file,"%d.%d.%d",&major,&minor,&patch);
+ fclose(file);
+ return major*65536 + minor*256 + patch;
+}
+
+#endif
if (stat(name, &statBuf) < 0)
return FALSE;
-
- return S_ISDIR(statBuf.st_mode);
+ if (S_ISDIR(statBuf.st_mode))
+ return TRUE;
+ return(FALSE);
}
* 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.)
+ * -Erik Andersen
*/
int
copyFile( const char *srcName, const char *destName,
if (setModes == TRUE) {
//fprintf(stderr, "Setting permissions for %s\n", destName);
chmod(destName, srcStatBuf.st_mode);
- if (followLinks == TRUE)
- chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
- else
+#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
+ if (followLinks == FALSE)
lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
+ else
+#endif
+ chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
times.actime = srcStatBuf.st_atime;
times.modtime = srcStatBuf.st_mtime;
#endif
-#ifdef BB_MV
-/*
- * 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.
- */
-char *buildName(const char *dirName, const char *fileName)
-{
- const char *cp;
- static char buf[PATH_LEN];
-
- if ((dirName == NULL) || (*dirName == '\0')) {
- strcpy(buf, fileName);
- return buf;
- }
-
- cp = strrchr(fileName, '/');
- if (cp)
- fileName = cp + 1;
+#if defined BB_TAR || defined BB_LS
- strcpy(buf, dirName);
- strcat(buf, "/");
+#define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
+#define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
- return buf;
-}
-#endif
+/* 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.
{
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
-
- /*
- * 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
-#ifdef BB_TAR
+#if defined BB_TAR
/*
- * Get the time string to be used for a file.
- * This is down to the minute for new files, but only the date for old files.
- * The string is returned from a static buffer, and so is overwritten for
- * each call.
+ * Return the standard ls-like time string from a time_t
+ * This is static and so is overwritten on each call.
*/
const char *timeString(time_t timeVal)
{
return buf;
}
-
-/*
- * 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.
- */
-int match(const char *text, const char *pattern)
-{
- const char *retryPat;
- const char *retryText;
- int ch;
- int found;
-
- 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;
- }
-
- if (!found) {
- pattern = retryPat;
- text = ++retryText;
- }
-
- /* fall into next case */
-
- case '?':
- if (*text++ == '\0')
- return FALSE;
-
- break;
-
- case '\\':
- ch = *pattern++;
-
- if (ch == '\0')
- return FALSE;
-
- /* fall into next case */
-
- default:
- if (*text == ch) {
- if (*text)
- text++;
- break;
- }
-
- if (*text) {
- pattern = retryPat;
- text = ++retryText;
- break;
- }
-
- return FALSE;
- }
-
- if (pattern == NULL)
- return FALSE;
- }
-
- return TRUE;
-}
-
-
/*
* Write all of the supplied buffer out to a file.
* This does multiple writes as necessary.
return total;
}
+#endif
+#if defined BB_TAR || defined BB_TAIL
/*
* Read all of the supplied buffer from a file.
* This does multiple reads as necessary.
#endif
-#if defined (BB_CHOWN) || defined (BB_CP) || defined (BB_FIND) || defined (BB_LS)
+#if defined (BB_CHOWN) || defined (BB_CP) || defined (BB_FIND) || defined (BB_LS) || defined (BB_INSMOD)
/*
* 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 (*fileAction) (const char *fileName),
- int (*dirAction) (const char *fileName))
+recursiveAction(const char *fileName, int recurse, int followLinks, int depthFirst,
+ int (*fileAction) (const char *fileName, struct stat* statbuf),
+ int (*dirAction) (const char *fileName, struct stat* statbuf))
{
int status;
struct stat statbuf;
struct dirent *next;
- if (followLinks == FALSE)
+ if (followLinks == TRUE)
status = stat(fileName, &statbuf);
else
status = lstat(fileName, &statbuf);
return (FALSE);
}
+ if ( (followLinks == FALSE) && (S_ISLNK(statbuf.st_mode)) ) {
+ if (fileAction == NULL)
+ return (TRUE);
+ else
+ return (fileAction(fileName, &statbuf));
+ }
+
if (recurse == FALSE) {
if (S_ISDIR(statbuf.st_mode)) {
if (dirAction != NULL)
- return (dirAction(fileName));
+ return (dirAction(fileName, &statbuf));
else
return (TRUE);
}
perror(fileName);
return (FALSE);
}
- if (dirAction != NULL) {
- status = dirAction(fileName);
+ if (dirAction != NULL && depthFirst == FALSE) {
+ status = dirAction(fileName, &statbuf);
if (status == FALSE) {
perror(fileName);
return (FALSE);
}
sprintf(nextFile, "%s/%s", fileName, next->d_name);
status =
- recursiveAction(nextFile, TRUE, followLinks, fileAction,
- dirAction);
+ recursiveAction(nextFile, TRUE, followLinks, depthFirst,
+ fileAction, dirAction);
if (status < 0) {
closedir(dir);
return (FALSE);
perror(fileName);
return (FALSE);
}
+ if (dirAction != NULL && depthFirst == TRUE) {
+ status = dirAction(fileName, &statbuf);
+ if (status == FALSE) {
+ perror(fileName);
+ return (FALSE);
+ }
+ }
} else {
if (fileAction == NULL)
return (TRUE);
else
- return (fileAction(fileName));
+ return (fileAction(fileName, &statbuf));
}
return (TRUE);
}
char *cpOld;
char buf[NAME_MAX];
- strcpy (buf, name);
-
+ strcpy( buf, name);
cp = strchr (buf, '/');
-
while (cp) {
cpOld = cp;
cp = strchr (cp + 1, '/');
-
*cpOld = '\0';
-
- if (mkdir (buf, cp ? 0777 : mode) == 0)
- printf ("Directory \"%s\" created\n", buf);
-
+ mkdir (buf, cp ? 0777 : mode);
*cpOld = '/';
}
}
#if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_MKDIR)
-/* [ugoa]{+|-|=}[rwxstl] */
-extern int parse_mode( const char* s, mode_t* theMode)
+/* [ugoa]{+|-|=}[rwxst] */
+
+
+
+extern int
+parse_mode( const char* s, mode_t* theMode)
{
- mode_t or;
- mode_t and;
+ 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 = S_ISVTX;
+ mode_t groups = 0;
char type;
char c;
for ( ; ; ) {
switch ( c = *s++ ) {
case '\0':
- return (FALSE);
+ return -1;
case 'u':
groups |= S_ISUID|S_IRWXU;
continue;
case '=':
case '-':
type = c;
- if ( groups == S_ISVTX ) /* The default is "all" */
+ if ( groups == 0 ) /* The default is "all" */
groups |= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;
break;
default:
- if ( c >= '0' && c <= '7' && mode == 0 && groups == S_ISVTX ) {
- and = 0;
- or = strtol(--s, 0, 010);
+ if ( isdigit(c) && c >= '0' && c <= '7' &&
+ mode == 0 && groups == 0 ) {
+ *theMode = strtol(--s, NULL, 8);
return (TRUE);
}
else
mode |= S_IXGRP|S_ISUID|S_ISGID;
continue;
case 't':
- mode |= S_ISVTX;
+ mode |= 0;
continue;
default:
- return (FALSE);
+ *theMode &= andMode;
+ *theMode |= orMode;
+ return( TRUE);
}
break;
}
switch ( type ) {
case '=':
- and &= ~(groups);
+ andMode &= ~(groups);
/* fall through */
case '+':
- or |= mode & groups;
+ orMode |= mode & groups;
break;
case '-':
- and &= ~(mode & groups);
- or &= and;
+ andMode &= ~(mode & groups);
+ orMode &= andMode;
break;
}
} while ( c == ',' );
+ *theMode &= andMode;
+ *theMode |= orMode;
return (TRUE);
}
+
+
+#endif
+
+
+
+
+
+
+
+#if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_PS)
+
+/* Use this to avoid needing the glibc NSS stuff
+ * This uses storage buf to hold things.
+ * */
+uid_t
+my_getid(const char *filename, char *name, uid_t id)
+{
+ FILE *file;
+ char *rname, *start, *end, buf[128];
+ uid_t rid;
+
+ file=fopen(filename,"r");
+ if (file == NULL) {
+ perror(filename);
+ return (-1);
+ }
+
+ while (fgets (buf, 128, file) != NULL) {
+ if (buf[0] == '#')
+ continue;
+
+ start = buf;
+ end = strchr (start, ':');
+ if (end == NULL)
+ continue;
+ *end = '\0';
+ rname = start;
+
+ start = end + 1;
+ end = strchr (start, ':');
+ if (end == NULL)
+ continue;
+
+ start = end + 1;
+ rid = (uid_t) strtol (start, &end, 10);
+ if (end == start)
+ continue;
+
+ if (name) {
+ if (0 == strcmp(rname, name)) {
+ fclose( file);
+ return( rid);
+ }
+ }
+ if ( id != -1 && id == rid ) {
+ strncpy(name, rname, 8);
+ fclose( file);
+ return( TRUE);
+ }
+ }
+ fclose(file);
+ return (-1);
+}
+
+uid_t
+my_getpwnam(char *name)
+{
+ return my_getid("/etc/passwd", name, -1);
+}
+
+gid_t
+my_getgrnam(char *name)
+{
+ return my_getid("/etc/group", name, -1);
+}
+
+void
+my_getpwuid(char* name, uid_t uid)
+{
+ my_getid("/etc/passwd", name, uid);
+}
+
+void
+my_getgrgid(char* group, gid_t gid)
+{
+ my_getid("/etc/group", group, gid);
+}
+
+
+#endif
+
+
+
+
+#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;
+}
+
+/*
+ * 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.
+ */
+
+int get_console_fd(char* tty_name)
+{
+ int fd;
+
+ if (tty_name)
+ {
+ if (-1 == (fd = open_a_console(tty_name)))
+ return -1;
+ else
+ return fd;
+ }
+
+ 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 */
+}
+
+
+#endif
+
+
+#if !defined BB_REGEXP && (defined BB_GREP || defined BB_SED)
+
+/* 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++;
+ }
+
+ if( !(*haystack) )
+ haystack = NULL;
+
+ return haystack;
+}
+
+/* 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
+ */
+extern int find_match(char *haystack, char *needle, int ignoreCase)
+{
+
+ if (ignoreCase == FALSE)
+ haystack = strstr (haystack, needle);
+ else
+ haystack = stristr (haystack, needle);
+ if (haystack == NULL)
+ return FALSE;
+ return TRUE;
+}
+
+
+/* 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;
+
+ if (ignoreCase == FALSE)
+ where = strstr (haystack, needle);
+ else
+ where = stristr (haystack, needle);
+
+ if (strcmp(needle, newNeedle)==0)
+ return FALSE;
+
+ oldhayStack = (char*)malloc((unsigned)(strlen(haystack)));
+ while(where!=NULL) {
+ foundOne++;
+ strcpy(oldhayStack, haystack);
+#if 0
+ if ( strlen(newNeedle) > strlen(needle)) {
+ haystack = (char *)realloc(haystack, (unsigned)(strlen(haystack) -
+ strlen(needle) + strlen(newNeedle)));
+ }
+#endif
+ 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
+
+
+#if defined BB_FIND
+/*
+ * 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.
+ */
+extern int
+check_wildcard_match(const char* text, const char* pattern)
+{
+ const char* retryPat;
+ const char* retryText;
+ int ch;
+ int found;
+
+ 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;
+ }
+
+ //if (!found)
+ if (found==TRUE)
+ {
+ pattern = retryPat;
+ text = ++retryText;
+ }
+
+ /* fall into next case */
+
+ case '?':
+ if (*text++ == '\0')
+ return FALSE;
+
+ break;
+
+ case '\\':
+ ch = *pattern++;
+
+ if (ch == '\0')
+ return FALSE;
+
+ /* fall into next case */
+
+ default:
+ if (*text == ch)
+ {
+ if (*text)
+ text++;
+ break;
+ }
+
+ if (*text)
+ {
+ pattern = retryPat;
+ text = ++retryText;
+ break;
+ }
+
+ return FALSE;
+ }
+
+ if (pattern == NULL)
+ return FALSE;
+ }
+
+ return TRUE;
+}
+#endif
+
+
+
+
+#if defined BB_DF | defined BB_MTAB
+/*
+ * 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.
+ */
+extern struct mntent *findMountPoint(const char *name, const char *table)
+{
+ 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;
+
+
+ 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
+
+
+
+#if !defined BB_MTAB && (defined BB_MOUNT || defined BB_DF )
+extern void whine_if_fstab_is_missing()
+{
+ struct stat statBuf;
+ if (stat("/etc/fstab", &statBuf) < 0)
+ fprintf(stderr, "/etc/fstab file missing -- install one to name /dev/root.\n\n");
+}
+#endif
+
+
+#if defined BB_DD || defined BB_TAIL
+/*
+ * Read a number with a possible multiplier.
+ * Returns -1 if the number format is illegal.
+ */
+extern long getNum (const char *cp)
+{
+ long value;
+
+ if (!isDecimal (*cp))
+ return -1;
+
+ value = 0;
+
+ while (isDecimal (*cp))
+ value = value * 10 + *cp++ - '0';
+
+ switch (*cp++) {
+ case 'm':
+ 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;
+ }
+
+ if (*cp)
+ return -1;
+
+ return value;
+}
+#endif
+
+
+#if defined BB_INIT || defined BB_HALT || defined BB_REBOOT
+
+#if ! defined BB_FEATURE_USE_PROCFS
+#error Sorry, I depend on the /proc filesystem right now.
+#endif
+/* findInitPid()
+ *
+ * This finds the pid of init (which is not always 1).
+ * Currently, it's implemented by rummaging through the proc filesystem.
+ *
+ * [return]
+ * 0 failure
+ * pid when init's pid is found.
+ */
+extern pid_t
+findInitPid()
+{
+ pid_t init_pid;
+ char filename[256];
+ char buffer[256];
+
+ /* no need to opendir ;) */
+ for (init_pid = 1; init_pid < 65536; init_pid++) {
+ FILE *status;
+
+ sprintf(filename, "/proc/%d/status", init_pid);
+ status = fopen(filename, "r");
+ if (!status) { continue; }
+ fgets(buffer, 256, status);
+ fclose(status);
+
+ if ( (strstr(buffer, "init\n") != NULL )) {
+ return init_pid;
+ }
+ }
+ return 0;
+}
#endif
/* END CODE */
projects / oweals / busybox.git / blobdiff