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#include "pwf.h" #include <pthread.h> #define FIX(x) (pw->pw_##x = pw->pw_##x-line+buf) static int getpw_r(const char *name, uid_t uid, struct passwd *pw, char *buf, size_t size, struct passwd **res) { FILE *f; char *line = 0; size_t len = 0; int rv = 0; int cs; pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs); f = fopen("/etc/passwd", "rbe"); if (!f) { rv = errno; goto done; } *res = 0; while (__getpwent_a(f, pw, &line, &len)) { if (name && !strcmp(name, pw->pw_name) || !name && pw->pw_uid == uid) { if (size < len) { rv = ERANGE; break; } *res = pw; memcpy(buf, line, len); FIX(name); FIX(passwd); FIX(gecos); FIX(dir); FIX(shell); break; } } free(line); fclose(f); done: pthread_setcancelstate(cs, 0); return rv; } int getpwnam_r(const char *name, struct passwd *pw, char *buf, size_t size, struct passwd **res) { return getpw_r(name, 0, pw, buf, size, res); } int getpwuid_r(uid_t uid, struct passwd *pw, char *buf, size_t size, struct passwd **res) { return getpw_r(0, uid, pw, buf, size, res); } |