Update draft release notes to 1.8.2.1
[git/mingw.git] / write_or_die.c
blob960f448cffd9ffd4e53763dfed3669bc374b8620
1 #include "cache.h"
3 /*
4 * Some cases use stdio, but want to flush after the write
5 * to get error handling (and to get better interactive
6 * behaviour - not buffering excessively).
8 * Of course, if the flush happened within the write itself,
9 * we've already lost the error code, and cannot report it any
10 * more. So we just ignore that case instead (and hope we get
11 * the right error code on the flush).
13 * If the file handle is stdout, and stdout is a file, then skip the
14 * flush entirely since it's not needed.
16 void maybe_flush_or_die(FILE *f, const char *desc)
18 static int skip_stdout_flush = -1;
19 struct stat st;
20 char *cp;
22 if (f == stdout) {
23 if (skip_stdout_flush < 0) {
24 cp = getenv("GIT_FLUSH");
25 if (cp)
26 skip_stdout_flush = (atoi(cp) == 0);
27 else if ((fstat(fileno(stdout), &st) == 0) &&
28 S_ISREG(st.st_mode))
29 skip_stdout_flush = 1;
30 else
31 skip_stdout_flush = 0;
33 if (skip_stdout_flush && !ferror(f))
34 return;
36 if (fflush(f)) {
37 if (errno == EPIPE)
38 exit(0);
39 die_errno("write failure on '%s'", desc);
43 void fsync_or_die(int fd, const char *msg)
45 if (fsync(fd) < 0) {
46 die_errno("fsync error on '%s'", msg);
50 void write_or_die(int fd, const void *buf, size_t count)
52 if (write_in_full(fd, buf, count) < 0) {
53 if (errno == EPIPE)
54 exit(0);
55 die_errno("write error");
59 int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg)
61 if (write_in_full(fd, buf, count) < 0) {
62 if (errno == EPIPE)
63 exit(0);
64 fprintf(stderr, "%s: write error (%s)\n",
65 msg, strerror(errno));
66 return 0;
69 return 1;
72 int write_or_whine(int fd, const void *buf, size_t count, const char *msg)
74 if (write_in_full(fd, buf, count) < 0) {
75 fprintf(stderr, "%s: write error (%s)\n",
76 msg, strerror(errno));
77 return 0;
80 return 1;