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1 | #include "cache.h" | |
2 | #include "run-command.h" | |
3 | ||
4 | /* | |
5 | * Some cases use stdio, but want to flush after the write | |
6 | * to get error handling (and to get better interactive | |
7 | * behaviour - not buffering excessively). | |
8 | * | |
9 | * Of course, if the flush happened within the write itself, | |
10 | * we've already lost the error code, and cannot report it any | |
11 | * more. So we just ignore that case instead (and hope we get | |
12 | * the right error code on the flush). | |
13 | * | |
14 | * If the file handle is stdout, and stdout is a file, then skip the | |
15 | * flush entirely since it's not needed. | |
16 | */ | |
17 | void maybe_flush_or_die(FILE *f, const char *desc) | |
18 | { | |
19 | static int skip_stdout_flush = -1; | |
20 | struct stat st; | |
21 | char *cp; | |
22 | ||
23 | if (f == stdout) { | |
24 | if (skip_stdout_flush < 0) { | |
25 | cp = getenv("GIT_FLUSH"); | |
26 | if (cp) | |
27 | skip_stdout_flush = (atoi(cp) == 0); | |
28 | else if ((fstat(fileno(stdout), &st) == 0) && | |
29 | S_ISREG(st.st_mode)) | |
30 | skip_stdout_flush = 1; | |
31 | else | |
32 | skip_stdout_flush = 0; | |
33 | } | |
34 | if (skip_stdout_flush && !ferror(f)) | |
35 | return; | |
36 | } | |
37 | if (fflush(f)) { | |
38 | check_pipe(errno); | |
39 | die_errno("write failure on '%s'", desc); | |
40 | } | |
41 | } | |
42 | ||
43 | void fprintf_or_die(FILE *f, const char *fmt, ...) | |
44 | { | |
45 | va_list ap; | |
46 | int ret; | |
47 | ||
48 | va_start(ap, fmt); | |
49 | ret = vfprintf(f, fmt, ap); | |
50 | va_end(ap); | |
51 | ||
52 | if (ret < 0) { | |
53 | check_pipe(errno); | |
54 | die_errno("write error"); | |
55 | } | |
56 | } | |
57 | ||
58 | void fsync_or_die(int fd, const char *msg) | |
59 | { | |
60 | if (fsync(fd) < 0) { | |
61 | die_errno("fsync error on '%s'", msg); | |
62 | } | |
63 | } | |
64 | ||
65 | void write_or_die(int fd, const void *buf, size_t count) | |
66 | { | |
67 | if (write_in_full(fd, buf, count) < 0) { | |
68 | check_pipe(errno); | |
69 | die_errno("write error"); | |
70 | } | |
71 | } |