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>

diff --git a/sha1_file.c b/sha1_file.c
index 18dd89b50a23a4a99b51d8e99d0c67cace2a1a2d..2a5be53faca4524f5a70e6e928044ba3aa402d8f 100644 (file)
--- a/sha1_file.c
+++ b/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;
 }

diff --git a/write_or_die.c b/write_or_die.c
index 488de721da8a316c06bf53e9091633e5ac415390..1224cac5da7e8bf51266eadf24e9e58e6e5a37cb 100644 (file)
--- a/write_or_die.c
+++ b/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;