1#include "pwf.h" 2#include <pthread.h> 3 4#define FIX(x) (gr->gr_##x = gr->gr_##x-line+buf) 5 6static int getgr_r(const char *name, gid_t gid, struct group *gr, char *buf, size_t size, struct group **res) 7{ 8 char *line = 0; 9 size_t len = 0; 10 char **mem = 0; 11 size_t nmem = 0; 12 int rv = 0; 13 size_t i; 14 int cs; 15 16 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs); 17 18 rv = __getgr_a(name, gid, gr, &line, &len, &mem, &nmem, res); 19 if (*res && size < len + (nmem+1)*sizeof(char *) + 32) { 20 *res = 0; 21 rv = ERANGE; 22 } 23 if (*res) { 24 buf += (16-(uintptr_t)buf)%16; 25 gr->gr_mem = (void *)buf; 26 buf += (nmem+1)*sizeof(char *); 27 memcpy(buf, line, len); 28 FIX(name); 29 FIX(passwd); 30 for (i=0; mem[i]; i++) 31 gr->gr_mem[i] = mem[i]-line+buf; 32 gr->gr_mem[i] = 0; 33 } 34 free(mem); 35 free(line); 36 pthread_setcancelstate(cs, 0); 37 return rv; 38} 39 40int getgrnam_r(const char *name, struct group *gr, char *buf, size_t size, struct group **res) 41{ 42 return getgr_r(name, 0, gr, buf, size, res); 43} 44 45int getgrgid_r(gid_t gid, struct group *gr, char *buf, size_t size, struct group **res) 46{ 47 return getgr_r(0, gid, gr, buf, size, res); 48} 49