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libbb/loop.c: style and readability fixes, no code changes

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2010-03-05 13:20:28 +01:00
parent 917693b5b3
commit 44fbfa78ca
1 changed files with 18 additions and 13 deletions
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31
libbb/loop.c
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@ -56,14 +56,16 @@ char* FAST_FUNC query_loop(const char *device)
{
int fd;
bb_loop_info loopinfo;
char *dev = 0;
char *dev = NULL;
fd = open(device, O_RDONLY);
if (fd < 0) return 0;
if (!ioctl(fd, BB_LOOP_GET_STATUS, &loopinfo))
dev = xasprintf("%ld %s", (long) loopinfo.lo_offset,
(char *)loopinfo.lo_file_name);
close(fd);
if (fd >= 0) {
if (ioctl(fd, BB_LOOP_GET_STATUS, &loopinfo) == 0) {
dev = xasprintf("%lu %s", (long) loopinfo.lo_offset,
(char *)loopinfo.lo_file_name);
}
close(fd);
}
return dev;
}
@ -73,7 +75,8 @@ int FAST_FUNC del_loop(const char *device)
int fd, rc;
fd = open(device, O_RDONLY);
if (fd < 0) return 1;
if (fd < 0)
return 1;
rc = ioctl(fd, LOOP_CLR_FD, 0);
close(fd);
@ -110,7 +113,7 @@ int FAST_FUNC set_loop(char **device, const char *file, unsigned long long offse
sprintf(dev, LOOP_FORMAT, i);
/* Ran out of block devices, return failure. */
if (stat(try, &statbuf) || !S_ISBLK(statbuf.st_mode)) {
if (stat(try, &statbuf) != 0 || !S_ISBLK(statbuf.st_mode)) {
rc = -ENOENT;
break;
}
@ -131,8 +134,8 @@ int FAST_FUNC set_loop(char **device, const char *file, unsigned long long offse
safe_strncpy((char *)loopinfo.lo_file_name, file, LO_NAME_SIZE);
loopinfo.lo_offset = offset;
/* Associate free loop device with file. */
if (!ioctl(dfd, LOOP_SET_FD, ffd)) {
if (!ioctl(dfd, BB_LOOP_SET_STATUS, &loopinfo))
if (ioctl(dfd, LOOP_SET_FD, ffd) == 0) {
if (ioctl(dfd, BB_LOOP_SET_STATUS, &loopinfo) == 0)
rc = 0;
else
ioctl(dfd, LOOP_CLR_FD, 0);
@ -143,8 +146,10 @@ int FAST_FUNC set_loop(char **device, const char *file, unsigned long long offse
file isn't pretty either. In general, mounting the same file twice
without using losetup manually is problematic.)
*/
} else if (strcmp(file, (char *)loopinfo.lo_file_name) != 0
|| offset != loopinfo.lo_offset) {
} else
if (strcmp(file, (char *)loopinfo.lo_file_name) != 0
|| offset != loopinfo.lo_offset
) {
rc = -1;
}
close(dfd);
@ -152,7 +157,7 @@ int FAST_FUNC set_loop(char **device, const char *file, unsigned long long offse
if (*device) break;
}
close(ffd);
if (!rc) {
if (rc == 0) {
if (!*device)
*device = xstrdup(dev);
return (mode == O_RDONLY); /* 1:ro, 0:rw */