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pam: always rely on loginuid instead of uid to determine cgroup and XDG_RUNTIME_DIR

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This commit is contained in:
Lennart Poettering 2010-11-16 00:10:57 +01:00
parent 0baf24ddd5
commit d90b9d27af
2 changed files with 29 additions and 13 deletions
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2
TODO
View File

@ -71,8 +71,6 @@
* allow runtime changing of log level and target
* in the PAM module rely on loginuid to figure out XDG_RUNTIME_DIR
* automatically determine TERM= based on tty name even for /dev/console
* declare /etc/os-release cross-distro standard

40
src/pam-module.c
View File

@ -128,7 +128,7 @@ static uint64_t get_session_id(int *mode) {
r = safe_atou32(s, &u);
free(s);
if (r >= 0 && u != (uint32_t) -1) {
if (r >= 0 && u != (uint32_t) -1 && u > 0) {
*mode = SESSION_ID_AUDIT;
return (uint64_t) u;
}
@ -179,31 +179,49 @@ static int get_user_data(
const char **ret_username,
struct passwd **ret_pw) {
const char *username;
struct passwd *pw;
const char *username = NULL;
struct passwd *pw = NULL;
int r;
bool have_loginuid = false;
char *s;
assert(handle);
assert(ret_username);
assert(ret_pw);
if ((r = pam_get_user(handle, &username, NULL)) != PAM_SUCCESS) {
pam_syslog(handle, LOG_ERR, "Failed to get user name.");
return r;
if (read_one_line_file("/proc/self/loginuid", &s) >= 0) {
uint32_t u;
r = safe_atou32(s, &u);
free(s);
if (r >= 0 && u != (uint32_t) -1 && u > 0) {
have_loginuid = true;
pw = pam_modutil_getpwuid(handle, u);
}
}
if (!username || !*username) {
pam_syslog(handle, LOG_ERR, "User name not valid.");
return PAM_AUTH_ERR;
if (!have_loginuid) {
if ((r = pam_get_user(handle, &username, NULL)) != PAM_SUCCESS) {
pam_syslog(handle, LOG_ERR, "Failed to get user name.");
return r;
}
if (!username || !*username) {
pam_syslog(handle, LOG_ERR, "User name not valid.");
return PAM_AUTH_ERR;
}
pw = pam_modutil_getpwnam(handle, username);
}
if (!(pw = pam_modutil_getpwnam(handle, username))) {
if (!pw) {
pam_syslog(handle, LOG_ERR, "Failed to get user data.");
return PAM_USER_UNKNOWN;
}
*ret_pw = pw;
*ret_username = username;
*ret_username = username ? username : pw->pw_name;
return PAM_SUCCESS;
}