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Commit | Line | Data |
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7230e6d0 RS |
1 | #include "cache.h" |
2 | ||
06f59e9f TT |
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). | |
7 | * | |
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). | |
12 | * | |
13 | * If the file handle is stdout, and stdout is a file, then skip the | |
14 | * flush entirely since it's not needed. | |
15 | */ | |
16 | void maybe_flush_or_die(FILE *f, const char *desc) | |
17 | { | |
18 | static int skip_stdout_flush = -1; | |
19 | struct stat st; | |
20 | char *cp; | |
21 | ||
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; | |
32 | } | |
33 | if (skip_stdout_flush && !ferror(f)) | |
34 | return; | |
35 | } | |
36 | if (fflush(f)) { | |
b2f5e268 JS |
37 | /* |
38 | * On Windows, EPIPE is returned only by the first write() | |
39 | * after the reading end has closed its handle; subsequent | |
40 | * write()s return EINVAL. | |
41 | */ | |
42 | if (errno == EPIPE || errno == EINVAL) | |
06f59e9f | 43 | exit(0); |
d824cbba | 44 | die_errno("write failure on '%s'", desc); |
06f59e9f TT |
45 | } |
46 | } | |
47 | ||
4c81b03e LT |
48 | void fsync_or_die(int fd, const char *msg) |
49 | { | |
50 | if (fsync(fd) < 0) { | |
d824cbba | 51 | die_errno("fsync error on '%s'", msg); |
4c81b03e LT |
52 | } |
53 | } | |
54 | ||
93822c22 | 55 | void write_or_die(int fd, const void *buf, size_t count) |
7cf67205 | 56 | { |
d34cf19b | 57 | if (write_in_full(fd, buf, count) < 0) { |
93822c22 AW |
58 | if (errno == EPIPE) |
59 | exit(0); | |
d824cbba | 60 | die_errno("write error"); |
e0814056 | 61 | } |
e0814056 AW |
62 | } |
63 | ||
64 | int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg) | |
65 | { | |
d34cf19b | 66 | if (write_in_full(fd, buf, count) < 0) { |
e0814056 AW |
67 | if (errno == EPIPE) |
68 | exit(0); | |
69 | fprintf(stderr, "%s: write error (%s)\n", | |
70 | msg, strerror(errno)); | |
71 | return 0; | |
7cf67205 CC |
72 | } |
73 | ||
74 | return 1; | |
75 | } | |
825cee7b | 76 | |
e0814056 | 77 | int write_or_whine(int fd, const void *buf, size_t count, const char *msg) |
825cee7b | 78 | { |
d34cf19b | 79 | if (write_in_full(fd, buf, count) < 0) { |
e0814056 AW |
80 | fprintf(stderr, "%s: write error (%s)\n", |
81 | msg, strerror(errno)); | |
82 | return 0; | |
825cee7b AW |
83 | } |
84 | ||
85 | return 1; | |
86 | } |