Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2
   3int copy_fd(int ifd, int ofd)
   4{
   5        while (1) {
   6                char buffer[8192];
   7                ssize_t len = xread(ifd, buffer, sizeof(buffer));
   8                if (!len)
   9                        break;
  10                if (len < 0) {
  11                        return error("copy-fd: read returned %s",
  12                                     strerror(errno));
  13                }
  14                if (write_in_full(ofd, buffer, len) < 0)
  15                        return error("copy-fd: write returned %s",
  16                                     strerror(errno));
  17        }
  18        return 0;
  19}
  20
  21static int copy_times(const char *dst, const char *src)
  22{
  23        struct stat st;
  24        struct utimbuf times;
  25        if (stat(src, &st) < 0)
  26                return -1;
  27        times.actime = st.st_atime;
  28        times.modtime = st.st_mtime;
  29        if (utime(dst, &times) < 0)
  30                return -1;
  31        return 0;
  32}
  33
  34int copy_file(const char *dst, const char *src, int mode)
  35{
  36        int fdi, fdo, status;
  37
  38        mode = (mode & 0111) ? 0777 : 0666;
  39        if ((fdi = open(src, O_RDONLY)) < 0)
  40                return fdi;
  41        if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) {
  42                close(fdi);
  43                return fdo;
  44        }
  45        status = copy_fd(fdi, fdo);
  46        close(fdi);
  47        if (close(fdo) != 0)
  48                return error("%s: close error: %s", dst, strerror(errno));
  49
  50        if (!status && adjust_shared_perm(dst))
  51                return -1;
  52
  53        return status;
  54}
  55
  56int copy_file_with_time(const char *dst, const char *src, int mode)
  57{
  58        int status = copy_file(dst, src, mode);
  59        if (!status)
  60                return copy_times(dst, src);
  61        return status;
  62}