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[git.git] / write_or_die.c

diff --git a/write_or_die.c b/write_or_die.c
index 488de721da8a316c06bf53e9091633e5ac415390..4e8183e93e88e7336baed561b026b702b9dcba4e 100644 (file)
--- a/write_or_die.c
+++ b/write_or_die.c
@@ -4,16 +4,11 @@ int read_in_full(int fd, void *buf, size_t count)
 {
        char *p = buf;
        ssize_t total = 0;
-       ssize_t loaded = 0;
 
        while (count > 0) {
-               loaded = xread(fd, p, count);
-               if (loaded <= 0) {
-                       if (total)
-                               return total;
-                       else
-                               return loaded;
-               }
+               ssize_t loaded = xread(fd, p, count);
+               if (loaded <= 0)
+                       return total ? total : loaded;
                count -= loaded;
                p += loaded;
                total += loaded;
@@ -26,13 +21,12 @@ void read_or_die(int fd, void *buf, size_t count)
 {
        ssize_t loaded;
 
-       if (!count)
-               return;
        loaded = read_in_full(fd, buf, count);
-       if (loaded == 0)
-               die("unexpected end of file");
-       else if (loaded < 0)
-               die("read error (%s)", strerror(errno));
+       if (loaded != count) {
+               if (loaded < 0)
+                       die("read error (%s)", strerror(errno));
+               die("read error: end of file");
+       }
 }
 
 int write_in_full(int fd, const void *buf, size_t count)
@@ -58,14 +52,7 @@ 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 +61,7 @@ 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 +74,7 @@ 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;