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authorRob Landley <rob@landley.net>2014-06-11 22:41:25 -0500
committerRob Landley <rob@landley.net>2014-06-11 22:41:25 -0500
commit2109b158f496b3ecccea34c960b45f7aeba6679e (patch)
treea885d37bfed2a27046da9179acc2d6208899d285 /toys
parenteb3c44367a3c92c52e6c203e18578016a9c1a705 (diff)
downloadtoybox-2109b158f496b3ecccea34c960b45f7aeba6679e.tar.gz
Cleanup pass on login
Diffstat (limited to 'toys')
-rw-r--r--toys/other/login.c42
1 files changed, 22 insertions, 20 deletions
diff --git a/toys/other/login.c b/toys/other/login.c
index 100c665a..09861644 100644
--- a/toys/other/login.c
+++ b/toys/other/login.c
@@ -23,18 +23,18 @@ config LOGIN
#define FOR_login
#include "toys.h"
-#define LOGIN_TIMEOUT 60
-#define LOGIN_FAIL_TIMEOUT 3
#define USER_NAME_MAX_SIZE 32
#define HOSTNAME_SIZE 32
GLOBALS(
char *hostname;
+
+ int login_timeout, login_fail_timeout;
)
static void login_timeout_handler(int sig __attribute__((unused)))
{
- printf("\nLogin timed out after %d seconds.\n", LOGIN_TIMEOUT);
+ printf("\nLogin timed out after %d seconds.\n", TT.login_timeout);
exit(0);
}
@@ -62,8 +62,9 @@ void read_user(char * buff, int size)
{
char hostname[HOSTNAME_SIZE+1];
int i = 0;
+
hostname[HOSTNAME_SIZE] = 0;
- if(!gethostname(hostname, HOSTNAME_SIZE)) fputs(hostname, stdout);
+ if (!gethostname(hostname, HOSTNAME_SIZE)) fputs(hostname, stdout);
fputs(" login: ", stdout);
fflush(stdout);
@@ -71,10 +72,10 @@ void read_user(char * buff, int size)
do {
int c = getchar();
if (c == EOF) exit(EXIT_FAILURE);
- buff[0] = c;
- } while (isblank(buff[0]));
+ *buff = c;
+ } while (isblank(*buff));
- if (buff[0] != '\n') if(!fgets(&buff[1], HOSTNAME_SIZE-1, stdin)) _exit(1);
+ if (*buff != '\n') if(!fgets(&buff[1], HOSTNAME_SIZE-1, stdin)) _exit(1);
while(i<HOSTNAME_SIZE-1 && isgraph(buff[i])) i++;
buff[i] = 0;
@@ -84,6 +85,7 @@ void handle_nologin(void)
{
int fd = open("/etc/nologin", O_RDONLY);
int size;
+
if (fd == -1) return;
size = readall(fd, toybuf,sizeof(toybuf)-1);
@@ -93,7 +95,7 @@ void handle_nologin(void)
close(fd);
fflush(stdout);
- exit(EXIT_FAILURE);
+ exit(1);
}
void handle_motd(void)
@@ -126,7 +128,7 @@ void setup_environment(const struct passwd *pwd, int clear_env)
if (chdir(pwd->pw_dir)) printf("bad home dir: %s\n", pwd->pw_dir);
if (clear_env) {
- const char * term = getenv("TERM");
+ const char *term = getenv("TERM");
clearenv();
if (term) setenv("TERM", term, 1);
}
@@ -141,7 +143,7 @@ void login_main(void)
{
int f_flag = toys.optflags & FLAG_f;
int h_flag = toys.optflags & FLAG_h;
- char username[USER_NAME_MAX_SIZE+1], *pass = NULL, **ss;
+ char username[33], *pass = NULL, **ss;
struct passwd * pwd = NULL;
struct spwd * spwd = NULL;
int auth_fail_cnt = 0;
@@ -154,18 +156,18 @@ void login_main(void)
openlog("login", LOG_PID | LOG_CONS, LOG_AUTH);
signal(SIGALRM, login_timeout_handler);
- alarm(LOGIN_TIMEOUT);
+ alarm(TT.login_timeout = 60);
for (ss = forbid; *ss; ss++) unsetenv(*ss);
while (1) {
tcflush(0, TCIFLUSH);
- username[USER_NAME_MAX_SIZE] = 0;
- if (toys.optargs[0]) strncpy(username, toys.optargs[0], USER_NAME_MAX_SIZE);
+ username[sizeof(username)-1] = 0;
+ if (*toys.optargs) strncpy(username, *toys.optargs, sizeof(username)-1);
else {
- read_user(username, USER_NAME_MAX_SIZE+1);
- if (username[0] == 0) continue;
+ read_user(username, sizeof(username));
+ if (!*username) continue;
}
pwd = getpwnam(username);
@@ -191,15 +193,15 @@ query_pass:
syslog(LOG_WARNING, "invalid password for '%s' on %s %s %s", username,
ttyname(0), h_flag?"from":"", h_flag?TT.hostname:"");
- sleep(LOGIN_FAIL_TIMEOUT);
+ sleep(3);
puts("Login incorrect");
if (++auth_fail_cnt == 3)
- error_exit("Maximum number of tries exceeded (%d)\n", auth_fail_cnt);
+ error_exit("Maximum number of tries exceeded (3)\n");
- username[0] = 0;
- pwd = NULL;
- spwd = NULL;
+ *username = 0;
+ pwd = 0;
+ spwd = 0;
}
alarm(0);