| #include "cache.h" |
| |
| static void check_pipe(int err) |
| { |
| if (err == EPIPE) { |
| signal(SIGPIPE, SIG_DFL); |
| raise(SIGPIPE); |
| /* Should never happen, but just in case... */ |
| exit(141); |
| } |
| } |
| |
| /* |
| * 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)) { |
| check_pipe(errno); |
| die_errno("write failure on '%s'", desc); |
| } |
| } |
| |
| void fsync_or_die(int fd, const char *msg) |
| { |
| if (fsync(fd) < 0) { |
| die_errno("fsync error on '%s'", msg); |
| } |
| } |
| |
| void write_or_die(int fd, const void *buf, size_t count) |
| { |
| if (write_in_full(fd, buf, count) < 0) { |
| check_pipe(errno); |
| die_errno("write error"); |
| } |
| } |
| |
| int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg) |
| { |
| if (write_in_full(fd, buf, count) < 0) { |
| check_pipe(errno); |
| 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; |
| } |