diff options
| -rw-r--r-- | libbb/bb_askpass.c | 36 | ||||
| -rw-r--r-- | loginutils/sulogin.c | 61 |
2 files changed, 50 insertions, 47 deletions
diff --git a/libbb/bb_askpass.c b/libbb/bb_askpass.c index 435314e..fd12f92 100644 --- a/libbb/bb_askpass.c +++ b/libbb/bb_askpass.c @@ -17,7 +17,7 @@ static void askpass_timeout(int ATTRIBUTE_UNUSED ignore) { } -char *bb_askpass(int timeout, const char * prompt) +char *bb_askpass(int timeout, const char *prompt) { /* Was static char[BIGNUM] */ enum { sizeof_passwd = 128 }; @@ -25,35 +25,36 @@ char *bb_askpass(int timeout, const char * prompt) char *ret; int i; - struct sigaction sa; - struct termios old, new; + struct sigaction sa, oldsa; + struct termios tio, oldtio; if (!passwd) passwd = xmalloc(sizeof_passwd); memset(passwd, 0, sizeof_passwd); - tcgetattr(STDIN_FILENO, &old); + tcgetattr(STDIN_FILENO, &oldtio); tcflush(STDIN_FILENO, TCIFLUSH); + tio = oldtio; + tio.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY); + tio.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP); + tcsetattr(STDIN_FILENO, TCSANOW, &tio); - fputs(prompt, stdout); - fflush(stdout); - - tcgetattr(STDIN_FILENO, &new); - new.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY); - new.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP); - tcsetattr(STDIN_FILENO, TCSANOW, &new); - + memset(&sa, 0, sizeof(sa)); + /* sa.sa_flags = 0; - no SA_RESTART! */ + /* SIGINT and SIGALRM will interrupt read below */ + sa.sa_handler = askpass_timeout; + sigaction(SIGINT, &sa, &oldsa); if (timeout) { - sa.sa_flags = 0; - sa.sa_handler = askpass_timeout; sigaction(SIGALRM, &sa, NULL); alarm(timeout); } + fputs(prompt, stdout); + fflush(stdout); ret = NULL; - /* On timeout, read will hopefully be interrupted by SIGALRM, + /* On timeout or Ctrl-C, read will hopefully be interrupted, * and we return NULL */ - if (read(STDIN_FILENO, passwd, sizeof_passwd-1) > 0) { + if (read(STDIN_FILENO, passwd, sizeof_passwd - 1) > 0) { ret = passwd; i = 0; /* Last byte is guaranteed to be 0 @@ -67,8 +68,9 @@ char *bb_askpass(int timeout, const char * prompt) if (timeout) { alarm(0); } + sigaction(SIGINT, &oldsa, NULL); - tcsetattr(STDIN_FILENO, TCSANOW, &old); + tcsetattr(STDIN_FILENO, TCSANOW, &oldtio); bb_putchar('\n'); fflush(stdout); return ret; diff --git a/loginutils/sulogin.c b/loginutils/sulogin.c index 7f100a1..f633fbb 100644 --- a/loginutils/sulogin.c +++ b/loginutils/sulogin.c @@ -9,29 +9,26 @@ #include "libbb.h" -static const char *const forbid[] = { - "ENV", - "BASH_ENV", - "HOME", - "IFS", - "PATH", - "SHELL", - "LD_LIBRARY_PATH", - "LD_PRELOAD", - "LD_TRACE_LOADED_OBJECTS", - "LD_BIND_NOW", - "LD_AOUT_LIBRARY_PATH", - "LD_AOUT_PRELOAD", - "LD_NOWARN", - "LD_KEEPDIR", - (char *) 0 -}; - - -static void catchalarm(int ATTRIBUTE_UNUSED junk) -{ - exit(EXIT_FAILURE); -} +static const char forbid[] ALIGN1 = + "ENV" "\0" + "BASH_ENV" "\0" + "HOME" "\0" + "IFS" "\0" + "PATH" "\0" + "SHELL" "\0" + "LD_LIBRARY_PATH" "\0" + "LD_PRELOAD" "\0" + "LD_TRACE_LOADED_OBJECTS" "\0" + "LD_BIND_NOW" "\0" + "LD_AOUT_LIBRARY_PATH" "\0" + "LD_AOUT_PRELOAD" "\0" + "LD_NOWARN" "\0" + "LD_KEEPDIR" "\0"; + +//static void catchalarm(int ATTRIBUTE_UNUSED junk) +//{ +// exit(EXIT_FAILURE); +//} int sulogin_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; @@ -40,7 +37,7 @@ int sulogin_main(int argc, char **argv) char *cp; int timeout = 0; char *timeout_arg; - const char *const *p; + const char *p; struct passwd *pwd; const char *shell; #if ENABLE_FEATURE_SHADOWPASSWDS @@ -71,10 +68,14 @@ int sulogin_main(int argc, char **argv) } /* Clear out anything dangerous from the environment */ - for (p = forbid; *p; p++) - unsetenv(*p); + p = forbid; + do { + unsetenv(p); + p += strlen(p) + 1; + } while (*p); - signal(SIGALRM, catchalarm); +// bb_askpass() already handles this +// signal(SIGALRM, catchalarm); pwd = getpwuid(0); if (!pwd) { @@ -105,7 +106,7 @@ int sulogin_main(int argc, char **argv) bb_error_msg("login incorrect"); } memset(cp, 0, strlen(cp)); - signal(SIGALRM, SIG_DFL); +// signal(SIGALRM, SIG_DFL); bb_info_msg("System Maintenance Mode"); @@ -122,6 +123,6 @@ int sulogin_main(int argc, char **argv) /* Exec login shell with no additional parameters. Never returns. */ run_shell(shell, 1, NULL, NULL); -auth_error: - bb_error_msg_and_die("no password entry for 'root'"); + auth_error: + bb_error_msg_and_die("no password entry for root"); } |