| #include "pwf.h" |
| |
| #define FIX(x) (gr->gr_##x = gr->gr_##x - line + buf) |
| |
| static int getgr_r(const char* name, gid_t gid, struct group* gr, char* buf, size_t size, |
| struct group** res) { |
| char* line = 0; |
| size_t len = 0; |
| char** mem = 0; |
| size_t nmem = 0; |
| int rv = 0; |
| size_t i; |
| |
| rv = __getgr_a(name, gid, gr, &line, &len, &mem, &nmem, res); |
| if (*res && size < len + (nmem + 1) * sizeof(char*) + 32) { |
| *res = 0; |
| rv = ERANGE; |
| } |
| if (*res) { |
| buf += (16 - (uintptr_t)buf) % 16; |
| gr->gr_mem = (void*)buf; |
| buf += (nmem + 1) * sizeof(char*); |
| memcpy(buf, line, len); |
| FIX(name); |
| FIX(passwd); |
| for (i = 0; mem[i]; i++) |
| gr->gr_mem[i] = mem[i] - line + buf; |
| gr->gr_mem[i] = 0; |
| } |
| free(mem); |
| free(line); |
| return rv; |
| } |
| |
| int getgrnam_r(const char* name, struct group* gr, char* buf, size_t size, struct group** res) { |
| return getgr_r(name, 0, gr, buf, size, res); |
| } |
| |
| int getgrgid_r(gid_t gid, struct group* gr, char* buf, size_t size, struct group** res) { |
| return getgr_r(0, gid, gr, buf, size, res); |
| } |