Permalink
Browse files

Clean up write_in_full() users

With the new-and-improved write_in_full() semantics, where a partial write
simply always returns a real error (and always sets 'errno' when that
happens, including for the disk full case), a lot of the callers of
write_in_full() were just unnecessarily complex.

In particular, there's no reason to ever check for a zero length or
return: if the length was zero, we'll return zero, otherwise, if a disk
full resulted in the actual write() system call returning zero the
write_in_full() logic would have correctly turned that into a negative
return value, with 'errno' set to ENOSPC.

I really wish every "write_in_full()" user would just check against "<0"
now, but this fixes the nasty and stupid ones.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
  • Loading branch information...
1 parent 9bbaa6c commit d34cf19b8987ae0f0806e257edf877238d044747 Linus Torvalds committed with Junio C Hamano Jan 12, 2007
Showing with 4 additions and 36 deletions.
  1. +1 −8 sha1_file.c
  2. +3 −28 write_or_die.c
View
9 sha1_file.c
@@ -1618,14 +1618,7 @@ int move_temp_to_file(const char *tmpfile, const char *filename)
static int write_buffer(int fd, const void *buf, size_t len)
{
- ssize_t size;
-
- if (!len)
- return 0;
- size = write_in_full(fd, buf, len);
- if (!size)
- return error("file write: disk full");
- if (size < 0)
+ if (write_in_full(fd, buf, len) < 0)
return error("file write error (%s)", strerror(errno));
return 0;
}
View
31 write_or_die.c
@@ -58,14 +58,7 @@ int write_in_full(int fd, const void *buf, size_t count)
void write_or_die(int fd, const void *buf, size_t count)
{
- ssize_t written;
-
- if (!count)
- return;
- written = write_in_full(fd, buf, count);
- if (written == 0)
- die("disk full?");
- else if (written < 0) {
+ if (write_in_full(fd, buf, count) < 0) {
if (errno == EPIPE)
exit(0);
die("write error (%s)", strerror(errno));
@@ -74,16 +67,7 @@ void write_or_die(int fd, const void *buf, size_t count)
int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg)
{
- ssize_t written;
-
- if (!count)
- return 1;
- written = write_in_full(fd, buf, count);
- if (written == 0) {
- fprintf(stderr, "%s: disk full?\n", msg);
- return 0;
- }
- else if (written < 0) {
+ if (write_in_full(fd, buf, count) < 0) {
if (errno == EPIPE)
exit(0);
fprintf(stderr, "%s: write error (%s)\n",
@@ -96,16 +80,7 @@ int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg)
int write_or_whine(int fd, const void *buf, size_t count, const char *msg)
{
- ssize_t written;
-
- if (!count)
- return 1;
- written = write_in_full(fd, buf, count);
- if (written == 0) {
- fprintf(stderr, "%s: disk full?\n", msg);
- return 0;
- }
- else if (written < 0) {
+ if (write_in_full(fd, buf, count) < 0) {
fprintf(stderr, "%s: write error (%s)\n",
msg, strerror(errno));
return 0;

0 comments on commit d34cf19

Please sign in to comment.