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

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 18 insertions, 13 deletions

diff --git a/libbb/loop.c b/libbb/loop.c
index 3fec7ad6d..a11933f35 100644
--- a/libbb/loop.c
+++ b/libbb/loop.c
@@ -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 */