ref: a0d4c5e208405f84076891faaa43235bb2b87fc2
dir: /sys/src/lib9p/uid.c/
#include <u.h> #include <libc.h> #include <auth.h> #include <fcall.h> #include <thread.h> #include <9p.h> /* * simplistic permission checking. assume that * each user is the leader of her own group. */ int hasperm(File *f, char *uid, int p) { int m; m = f->mode & 7; /* other */ if((p & m) == p) return 1; if(strcmp(f->uid, uid) == 0) { m |= (f->mode>>6) & 7; if((p & m) == p) return 1; } if(strcmp(f->gid, uid) == 0) { m |= (f->mode>>3) & 7; if((p & m) == p) return 1; } return 0; }