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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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27
libbb/loop.c
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@ -56,14 +56,16 @@ char* FAST_FUNC query_loop(const char *device)
{ {
int fd; int fd;
bb_loop_info loopinfo; bb_loop_info loopinfo;
char *dev = 0; char *dev = NULL;
fd = open(device, O_RDONLY); fd = open(device, O_RDONLY);
if (fd < 0) return 0; if (fd >= 0) {
if (!ioctl(fd, BB_LOOP_GET_STATUS, &loopinfo)) if (ioctl(fd, BB_LOOP_GET_STATUS, &loopinfo) == 0) {
dev = xasprintf("%ld %s", (long) loopinfo.lo_offset, dev = xasprintf("%lu %s", (long) loopinfo.lo_offset,
(char *)loopinfo.lo_file_name); (char *)loopinfo.lo_file_name);
}
close(fd); close(fd);
}
return dev; return dev;
} }
@ -73,7 +75,8 @@ int FAST_FUNC del_loop(const char *device)
int fd, rc; int fd, rc;
fd = open(device, O_RDONLY); fd = open(device, O_RDONLY);
if (fd < 0) return 1; if (fd < 0)
return 1;
rc = ioctl(fd, LOOP_CLR_FD, 0); rc = ioctl(fd, LOOP_CLR_FD, 0);
close(fd); 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); sprintf(dev, LOOP_FORMAT, i);
/* Ran out of block devices, return failure. */ /* 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; rc = -ENOENT;
break; 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); safe_strncpy((char *)loopinfo.lo_file_name, file, LO_NAME_SIZE);
loopinfo.lo_offset = offset; loopinfo.lo_offset = offset;
/* Associate free loop device with file. */ /* Associate free loop device with file. */
if (!ioctl(dfd, LOOP_SET_FD, ffd)) { if (ioctl(dfd, LOOP_SET_FD, ffd) == 0) {
if (!ioctl(dfd, BB_LOOP_SET_STATUS, &loopinfo)) if (ioctl(dfd, BB_LOOP_SET_STATUS, &loopinfo) == 0)
rc = 0; rc = 0;
else else
ioctl(dfd, LOOP_CLR_FD, 0); 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 file isn't pretty either. In general, mounting the same file twice
without using losetup manually is problematic.) without using losetup manually is problematic.)
*/ */
} else if (strcmp(file, (char *)loopinfo.lo_file_name) != 0 } else
|| offset != loopinfo.lo_offset) { if (strcmp(file, (char *)loopinfo.lo_file_name) != 0
|| offset != loopinfo.lo_offset
) {
rc = -1; rc = -1;
} }
close(dfd); close(dfd);
@ -152,7 +157,7 @@ int FAST_FUNC set_loop(char **device, const char *file, unsigned long long offse
if (*device) break; if (*device) break;
} }
close(ffd); close(ffd);
if (!rc) { if (rc == 0) {
if (!*device) if (!*device)
*device = xstrdup(dev); *device = xstrdup(dev);
return (mode == O_RDONLY); /* 1:ro, 0:rw */ return (mode == O_RDONLY); /* 1:ro, 0:rw */