Start preparing for 1.8.4.2
[alt-git.git] / write_or_die.c
blobb50f99a9361926d2116c85e3e90a132fb9dab742
1 #include "cache.h"
3 static void check_pipe(int err)
5 if (err == EPIPE) {
6 signal(SIGPIPE, SIG_DFL);
7 raise(SIGPIPE);
8 /* Should never happen, but just in case... */
9 exit(141);
14 * Some cases use stdio, but want to flush after the write
15 * to get error handling (and to get better interactive
16 * behaviour - not buffering excessively).
18 * Of course, if the flush happened within the write itself,
19 * we've already lost the error code, and cannot report it any
20 * more. So we just ignore that case instead (and hope we get
21 * the right error code on the flush).
23 * If the file handle is stdout, and stdout is a file, then skip the
24 * flush entirely since it's not needed.
26 void maybe_flush_or_die(FILE *f, const char *desc)
28 static int skip_stdout_flush = -1;
29 struct stat st;
30 char *cp;
32 if (f == stdout) {
33 if (skip_stdout_flush < 0) {
34 cp = getenv("GIT_FLUSH");
35 if (cp)
36 skip_stdout_flush = (atoi(cp) == 0);
37 else if ((fstat(fileno(stdout), &st) == 0) &&
38 S_ISREG(st.st_mode))
39 skip_stdout_flush = 1;
40 else
41 skip_stdout_flush = 0;
43 if (skip_stdout_flush && !ferror(f))
44 return;
46 if (fflush(f)) {
47 check_pipe(errno);
48 die_errno("write failure on '%s'", desc);
52 void fsync_or_die(int fd, const char *msg)
54 if (fsync(fd) < 0) {
55 die_errno("fsync error on '%s'", msg);
59 void write_or_die(int fd, const void *buf, size_t count)
61 if (write_in_full(fd, buf, count) < 0) {
62 check_pipe(errno);
63 die_errno("write error");
67 int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg)
69 if (write_in_full(fd, buf, count) < 0) {
70 check_pipe(errno);
71 fprintf(stderr, "%s: write error (%s)\n",
72 msg, strerror(errno));
73 return 0;
76 return 1;
79 int write_or_whine(int fd, const void *buf, size_t count, const char *msg)
81 if (write_in_full(fd, buf, count) < 0) {
82 fprintf(stderr, "%s: write error (%s)\n",
83 msg, strerror(errno));
84 return 0;
87 return 1;