compat/pread.c

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