sys/src/libc/9sys/access.c

   1 #include <u.h>
   2 #include <libc.h>
   3
   4 int
   5 access(char *name, int mode)
   6 {
   7         int fd;
   8         Dir *db;
   9         static char omode[] = {
  10                 0,
  11                 OEXEC,
  12                 OWRITE,
  13                 ORDWR,
  14                 OREAD,
  15                 OEXEC,  /* only approximate */
  16                 ORDWR,
  17                 ORDWR   /* only approximate */
  18         };
  19
  20         if(mode == AEXIST){
  21                 db = dirstat(name);
  22                 free(db);
  23                 if(db != nil)
  24                         return 0;
  25                 return -1;
  26         }
  27         fd = open(name, omode[mode&7]);
  28         if(fd >= 0){
  29                 close(fd);
  30                 return 0;
  31         }
  32         return -1;
  33 }