plan9port

fork of plan9port with libvec, libstr and libsdb
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uid.c (519B)

      1 #include <u.h>
      2 #include <libc.h>
      3 #include <fcall.h>
      4 #include <thread.h>
      5 #include <9p.h>
      6 
      7 /*
      8  * simplistic permission checking.  assume that
      9  * each user is the leader of her own group.
     10  */
     11 int
     12 hasperm(File *f, char *uid, int p)
     13 {
     14 	int m;
     15 
     16 	m = f->dir.mode & 7;	/* other */
     17 	if((p & m) == p)
     18 		return 1;
     19 
     20 	if(strcmp(f->dir.uid, uid) == 0) {
     21 		m |= (f->dir.mode>>6) & 7;
     22 		if((p & m) == p)
     23 			return 1;
     24 	}
     25 
     26 	if(strcmp(f->dir.gid, uid) == 0) {
     27 		m |= (f->dir.mode>>3) & 7;
     28 		if((p & m) == p)
     29 			return 1;
     30 	}
     31 
     32 	return 0;
     33 }