copy.c

   1 #define USE_THE_REPOSITORY_VARIABLE
   2
   3 #include "git-compat-util.h"
   4 #include "copy.h"
   5 #include "path.h"
   6 #include "gettext.h"
   7 #include "strbuf.h"
   8 #include "abspath.h"
   9
  10 int copy_fd(int ifd, int ofd)
  11 {
  12         while (1) {
  13                 char buffer[8192];
  14                 ssize_t len = xread(ifd, buffer, sizeof(buffer));
  15                 if (!len)
  16                         break;
  17                 if (len < 0)
  18                         return COPY_READ_ERROR;
  19                 if (write_in_full(ofd, buffer, len) < 0)
  20                         return COPY_WRITE_ERROR;
  21         }
  22         return 0;
  23 }
  24
  25 static int copy_times(const char *dst, const char *src)
  26 {
  27         struct stat st;
  28         struct utimbuf times;
  29         if (stat(src, &st) < 0)
  30                 return -1;
  31         times.actime = st.st_atime;
  32         times.modtime = st.st_mtime;
  33         if (utime(dst, &times) < 0)
  34                 return -1;
  35         return 0;
  36 }
  37
  38 int copy_file(const char *dst, const char *src, int mode)
  39 {
  40         int fdi, fdo, status;
  41
  42         mode = (mode & 0111) ? 0777 : 0666;
  43         if ((fdi = open(src, O_RDONLY)) < 0)
  44                 return fdi;
  45         if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) {
  46                 close(fdi);
  47                 return fdo;
  48         }
  49         status = copy_fd(fdi, fdo);
  50         switch (status) {
  51         case COPY_READ_ERROR:
  52                 error_errno("copy-fd: read returned");
  53                 break;
  54         case COPY_WRITE_ERROR:
  55                 error_errno("copy-fd: write returned");
  56                 break;
  57         }
  58         close(fdi);
  59         if (close(fdo) != 0)
  60                 return error_errno("%s: close error", dst);
  61
  62         if (!status && adjust_shared_perm(the_repository, dst))
  63                 return -1;
  64
  65         return status;
  66 }
  67
  68 int copy_file_with_time(const char *dst, const char *src, int mode)
  69 {
  70         int status = copy_file(dst, src, mode);
  71         if (!status)
  72                 return copy_times(dst, src);
  73         return status;
  74 }