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Tip revision: 86bab9615c3516d4ac7756ae3c1285d331b78f04 authored by Junio C Hamano on 02 September 2007, 07:00:00 UTC
GIT 1.5.3
GIT 1.5.3
Tip revision: 86bab96
write_or_die.c
#include "cache.h"
/*
* Some cases use stdio, but want to flush after the write
* to get error handling (and to get better interactive
* behaviour - not buffering excessively).
*
* Of course, if the flush happened within the write itself,
* we've already lost the error code, and cannot report it any
* more. So we just ignore that case instead (and hope we get
* the right error code on the flush).
*
* If the file handle is stdout, and stdout is a file, then skip the
* flush entirely since it's not needed.
*/
void maybe_flush_or_die(FILE *f, const char *desc)
{
static int skip_stdout_flush = -1;
struct stat st;
char *cp;
if (f == stdout) {
if (skip_stdout_flush < 0) {
cp = getenv("GIT_FLUSH");
if (cp)
skip_stdout_flush = (atoi(cp) == 0);
else if ((fstat(fileno(stdout), &st) == 0) &&
S_ISREG(st.st_mode))
skip_stdout_flush = 1;
else
skip_stdout_flush = 0;
}
if (skip_stdout_flush && !ferror(f))
return;
}
if (fflush(f)) {
if (errno == EPIPE)
exit(0);
die("write failure on %s: %s", desc, strerror(errno));
}
}
int read_in_full(int fd, void *buf, size_t count)
{
char *p = buf;
ssize_t total = 0;
while (count > 0) {
ssize_t loaded = xread(fd, p, count);
if (loaded <= 0)
return total ? total : loaded;
count -= loaded;
p += loaded;
total += loaded;
}
return total;
}
int write_in_full(int fd, const void *buf, size_t count)
{
const char *p = buf;
ssize_t total = 0;
while (count > 0) {
ssize_t written = xwrite(fd, p, count);
if (written < 0)
return -1;
if (!written) {
errno = ENOSPC;
return -1;
}
count -= written;
p += written;
total += written;
}
return total;
}
void write_or_die(int fd, const void *buf, size_t count)
{
if (write_in_full(fd, buf, count) < 0) {
if (errno == EPIPE)
exit(0);
die("write error (%s)", strerror(errno));
}
}
int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg)
{
if (write_in_full(fd, buf, count) < 0) {
if (errno == EPIPE)
exit(0);
fprintf(stderr, "%s: write error (%s)\n",
msg, strerror(errno));
return 0;
}
return 1;
}
int write_or_whine(int fd, const void *buf, size_t count, const char *msg)
{
if (write_in_full(fd, buf, count) < 0) {
fprintf(stderr, "%s: write error (%s)\n",
msg, strerror(errno));
return 0;
}
return 1;
}