struct passwd *fgetpwent(FILE *f)
{
static char *line = NULL;
static struct passwd pw = {0};
size_t size=0;
return __getpwent_a(f, &pw, &line, &size);
}
struct passwd* getpwent() {
struct passwd* res;
if (!f)
f = fopen("/etc/passwd", "rbe");
if (!f)
return 0;
__getpwent_a(f, &pw, &line, &size, &res);
return res;
}
struct passwd *getpwent()
{
static char *line;
static struct passwd pw;
size_t size=0;
if (!f) f = fopen("/etc/passwd", "rbe");
if (!f) return 0;
return __getpwent_a(f, &pw, &line, &size);
}
int __getpw_a(const char *name, uid_t uid, struct passwd *pw, char **buf, size_t *size, struct passwd **res)
{
FILE *f;
int cs;
int rv = 0;
*res = 0;
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
f = fopen("/etc/passwd", "rbe");
if (!f) {
rv = errno;
goto done;
}
while (!(rv = __getpwent_a(f, pw, buf, size, res)) && *res) {
if ((name && !strcmp(name, (*res)->pw_name))
|| (!name && (*res)->pw_uid == uid))
break;
}
fclose(f);
if (!*res && (rv == 0 || rv == ENOENT || rv == ENOTDIR)) {
int32_t req = name ? GETPWBYNAME : GETPWBYUID;
const char *key;
int32_t passwdbuf[PW_LEN] = {0};
size_t len = 0;
char uidbuf[11] = {0};
if (name) {
key = name;
} else {
/* uid outside of this range can't be queried with the
* nscd interface, but might happen if uid_t ever
* happens to be a larger type (this is not true as of
* now)
*/
if(uid > UINT32_MAX) {
rv = 0;
goto done;
}
key = itoa(uidbuf, uid);
}
f = __nscd_query(req, key, passwdbuf, sizeof passwdbuf, (int[]){0});
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", "rb");
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;
}
