Andrew's git - gitweb.git/blob

   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 */
  17void 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
  43void 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
  58void 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
  65void 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}