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