compat/pread.c

   1 #include "../git-compat-util.h"
   2 #include "../wrapper.h"
   3
   4 ssize_t git_pread(int fd, void *buf, size_t count, off_t offset)
   5 {
   6         off_t current_offset;
   7         ssize_t rc;
   8
   9         current_offset = lseek(fd, 0, SEEK_CUR);
  10
  11         if (lseek(fd, offset, SEEK_SET) < 0)
  12                 return -1;
  13
  14         rc = read_in_full(fd, buf, count);
  15
  16         if (current_offset != lseek(fd, current_offset, SEEK_SET))
  17                 return -1;
  18         return rc;
  19 }