/* Added vfs mount options - aeb - 960223 */
/* Removed lomount - aeb - 960224 */
-/* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
+/* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
* Sun Mar 21 1999 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
* - fixed strerr(errno) in gettext calls
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
+#include <stdint.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <dirent.h>
-#include "sysmacros.h"
+#include <sys/sysmacros.h>
#include <linux/loop.h>
+#include <limits.h>
#include "lopart.h"
#include "xstrncpy.h"
#define LOOP_CTL_GET_FREE 0x4C82
#endif
-#if !defined (__alpha__) && !defined (__ia64__) && !defined (__x86_64__) \
- && !defined (__s390x__)
-#define int2ptr(x) ((void *) ((int) x))
-#else
-#define int2ptr(x) ((void *) ((long) x))
-#endif
-
static char *
xstrdup (const char *s)
{
return t;
}
-extern int
-is_loop_device (const char *device)
-{
- struct stat statbuf;
- int loopmajor;
-#if 1
- loopmajor = 7;
-#else
- FILE *procdev;
- char line[100], *cp;
-
- loopmajor = 0;
-
- if ((procdev = fopen(PROC_DEVICES, "r")) != NULL) {
-
- while (fgets (line, sizeof(line), procdev)) {
-
- if ((cp = strstr (line, " loop\n")) != NULL) {
- *cp='\0';
- loopmajor=atoi(line);
- break;
- }
- }
-
- fclose(procdev);
- }
-#endif
- return (loopmajor && stat(device, &statbuf) == 0 &&
- S_ISBLK(statbuf.st_mode) &&
- major(statbuf.st_rdev) == loopmajor);
-}
-
#define SIZE(a) (sizeof(a)/sizeof(a[0]))
-extern char *
-find_loop_by_file (const char * filename)
+char *find_loop_by_file(const char *filename)
{
DIR *dir;
struct dirent *dent;
- char dev[64], *found = NULL;
- int fd;
+ char dev[64], *found = NULL, *p;
+ int fd, bytes_read;
struct stat statbuf;
struct loop_info loopinfo;
+ const char VIRT_BLOCK[] = "/sys/devices/virtual/block";
+ char path[PATH_MAX];
- dir = opendir("/dev");
+ dir = opendir(VIRT_BLOCK);
if (!dir)
return NULL;
while ((dent = readdir(dir)) != NULL) {
if (strncmp(dent->d_name,"loop",4))
continue;
- if (!strcmp(dent->d_name, "loop-control"))
+
+ if (snprintf(path, PATH_MAX, "%s/%s/dev", VIRT_BLOCK,
+ dent->d_name) >= PATH_MAX)
continue;
- sprintf(dev, "/dev/%s", dent->d_name);
- fd = open (dev, O_RDONLY);
+ fd = open(path, O_RDONLY);
if (fd < 0)
- break;
+ continue;
+
+ bytes_read = read(fd, dev, sizeof(dev) - 1);
+ if (bytes_read <= 0) {
+ close(fd);
+ continue;
+ }
+
+ close(fd);
+
+ dev[bytes_read] = '\0';
+ p = strchr(dev, '\n');
+ if (p != NULL)
+ *p = '\0';
+ if (snprintf(path, PATH_MAX, "/dev/block/%s", dev) >= PATH_MAX)
+ continue;
+
+ fd = open (path, O_RDONLY);
+ if (fd < 0)
+ continue;
if (fstat (fd, &statbuf) != 0 ||
!S_ISBLK(statbuf.st_mode)) {
continue;
}
+ close (fd);
+
if (0 == strcmp(filename, loopinfo.lo_name)) {
- close (fd);
- found = xstrdup(dev);
+ found = realpath(path, NULL);
break;
}
-
- close (fd);
}
closedir(dir);
return found;
}
-extern char *
-find_unused_loop_device (void)
+char *find_unused_loop_device(void)
{
- char dev[20], *next_loop_dev = NULL;;
+ char dev[20], *next_loop_dev = NULL;
int fd, next_loop = 0, somedev = 0, someloop = 0, loop_known = 0;
struct stat statbuf;
struct loop_info loopinfo;
fprintf(stderr, "mount: could not find any device /dev/loop#");
else if (!someloop) {
- if (loop_known == 1)
- fprintf(stderr,
- "mount: Could not find any loop device.\n"
- " Maybe /dev/loop# has a wrong major number?");
- else if (loop_known == -1)
- fprintf(stderr,
- "mount: Could not find any loop device, and, according to %s,\n"
- " this kernel does not know about the loop device.\n"
- " (If so, then recompile or `modprobe loop'.)",
- PROC_DEVICES);
-
- else
- fprintf(stderr,
- "mount: Could not find any loop device. Maybe this kernel does not know\n"
- " about the loop device (then recompile or `modprobe loop'), or\n"
- " maybe /dev/loop# has the wrong major number?");
-
+ if (loop_known == 1)
+ fprintf(stderr,
+ "mount: Could not find any loop device.\n"
+ " Maybe /dev/loop# has a wrong major number?");
+ else if (loop_known == -1)
+ fprintf(stderr,
+ "mount: Could not find any loop device, and, according to %s,\n"
+ " this kernel does not know about the loop device.\n"
+ " (If so, then recompile or `modprobe loop'.)",
+ PROC_DEVICES);
+ else
+ fprintf(stderr,
+ "mount: Could not find any loop device. Maybe this kernel does not know\n"
+ " about the loop device (then recompile or `modprobe loop'), or\n"
+ " maybe /dev/loop# has the wrong major number?");
} else
fprintf(stderr, "mount: could not find any free loop device");
- return 0;
+ return NULL;
}
-extern int
-set_loop (const char *device, const char *file, int offset, int *loopro)
+int set_loop(const char *device, const char *file, int offset, int *loopro)
{
struct loop_info loopinfo;
int fd, ffd, mode;
loopinfo.lo_encrypt_type = LO_CRYPT_NONE;
loopinfo.lo_encrypt_key_size = 0;
- if (ioctl (fd, LOOP_SET_FD, int2ptr(ffd)) < 0) {
+ if (ioctl(fd, LOOP_SET_FD, (void*)(uintptr_t)(ffd)) < 0) {
perror ("ioctl: LOOP_SET_FD");
close (fd);
close (ffd);
return 0;
}
-extern int
-del_loop (const char *device)
+int del_loop(const char *device)
{
int retries = 5;
int fd;
projects / platform / upstream / multipath-tools.git / blobdiff