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| #include "cache.h" | |
| #include "config.h" | |
| #include "run-command.h" | |
| /* | |
| * 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 fprintf_or_die(FILE *f, const char *fmt, ...) | |
| { | |
| va_list ap; | |
| int ret; | |
| va_start(ap, fmt); | |
| ret = vfprintf(f, fmt, ap); | |
| va_end(ap); | |
| if (ret < 0) { | |
| check_pipe(errno); | |
| die_errno("write error"); | |
| } | |
| } | |
| static int maybe_fsync(int fd) | |
| { | |
| if (use_fsync < 0) | |
| use_fsync = git_env_bool("GIT_TEST_FSYNC", 1); | |
| if (!use_fsync) | |
| return 0; | |
| if (fsync_method == FSYNC_METHOD_WRITEOUT_ONLY && | |
| git_fsync(fd, FSYNC_WRITEOUT_ONLY) >= 0) | |
| return 0; | |
| return git_fsync(fd, FSYNC_HARDWARE_FLUSH); | |
| } | |
| void fsync_or_die(int fd, const char *msg) | |
| { | |
| if (maybe_fsync(fd) < 0) | |
| die_errno("fsync error on '%s'", msg); | |
| } | |
| int fsync_component(enum fsync_component component, int fd) | |
| { | |
| if (fsync_components & component) | |
| return maybe_fsync(fd); | |
| return 0; | |
| } | |
| void fsync_component_or_die(enum fsync_component component, int fd, const char *msg) | |
| { | |
| if (fsync_components & component) | |
| fsync_or_die(fd, 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"); | |
| } | |
| } | |
| void fwrite_or_die(FILE *f, const void *buf, size_t count) | |
| { | |
| if (fwrite(buf, 1, count, f) != count) | |
| die_errno("fwrite error"); | |
| } | |
| void fflush_or_die(FILE *f) | |
| { | |
| if (fflush(f)) | |
| die_errno("fflush error"); | |
| } |