emo/sysvinit
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* Fix signal and alarm handling based on the patch from Florent Viard.

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(was local bug #32304)
* Add fix for Redhat bug #573346: last incorrectly displays IPv6
  addresses (was local bug #29497)
This commit is contained in:
Werner Fink 2011-03-11 16:10:42 +00:00
parent e1a1f90204
commit 84e86ebbcd
3 changed files with 37 additions and 21 deletions
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4
doc/Changelog
View File

@ -1,6 +1,10 @@
sysvinit (2.89dsf) UNRELEASED; urgency=low
[ Werner Fink ]
* Fix signal and alarm handling based on the patch from Florent Viard.
(was local bug #32304)
* Add fix for Redhat bug #573346: last incorrectly displays IPv6
addresses (was local bug #29497)
* Correct fix for Debian bug #547073: use IUTF8 flag if defined
and if already set to make sure the utf-8 flag is not cleared
from the tty. Patch from Samuel Thibault.

18
src/last.c
View File

@ -318,30 +318,22 @@ int dns_lookup(char *result, int size, int useip, int32_t *a)
struct sockaddr_in6 sin6;
struct sockaddr *sa;
int salen, flags;
unsigned int topnibble;
unsigned int azero = 0, sitelocal = 0;
int mapped = 0;
flags = useip ? NI_NUMERICHOST : 0;
/*
* IPv4 or IPv6 ? We use 2 heuristics:
* 1. Current IPv6 range uses 2000-3fff or fec0-feff.
* Outside of that is illegal and must be IPv4.
* 2. If last 3 bytes are 0, must be IPv4
* 3. If IPv6 in IPv4, handle as IPv4
* IPv4 or IPv6 ?
* 1. If last 3 4bytes are 0, must be IPv4
* 2. If IPv6 in IPv4, handle as IPv4
* 3. Anything else is IPv6
*
* Ugly.
*/
if (a[0] == 0 && a[1] == 0 && a[2] == (int32_t)htonl (0xffff))
mapped = 1;
topnibble = ntohl((unsigned int)a[0]) >> 28;
azero = ntohl((unsigned int)a[0]) >> 16;
sitelocal = (azero >= 0xfec0 && azero <= 0xfeff) ? 1 : 0;
if (((topnibble < 2 || topnibble > 3) && (!sitelocal)) || mapped ||
(a[1] == 0 && a[2] == 0 && a[3] == 0)) {
if (mapped || (a[1] == 0 && a[2] == 0 && a[3] == 0)) {
/* IPv4 */
sin.sin_family = AF_INET;
sin.sin_port = 0;

36
src/sulogin.c
View File

@ -68,6 +68,8 @@ static void (*saved_sigint) = SIG_DFL;
static void (*saved_sigtstp) = SIG_DFL;
static void (*saved_sigquit) = SIG_DFL;
static volatile sig_atomic_t alarm_rised;
#ifndef IUCLC
# define IUCLC 0
#endif
@ -149,6 +151,14 @@ void alrm_handler(int sig __attribute__((unused)))
void alrm_handler(int sig)
# endif
{
/* Timeout expired */
alarm_rised++;
signal(SIGINT, saved_sigint);
signal(SIGTSTP, saved_sigtstp);
signal(SIGQUIT, saved_sigquit);
/* Never use exit(3) or stdio(3) within a signal handler */
}
/*
@ -508,8 +518,8 @@ int main(int argc, char **argv)
* See if we need to open an other tty device.
*/
saved_sigint = signal(SIGINT, SIG_IGN);
saved_sigtstp = signal(SIGQUIT, SIG_IGN);
saved_sigquit = signal(SIGTSTP, SIG_IGN);
saved_sigquit = signal(SIGQUIT, SIG_IGN);
saved_sigtstp = signal(SIGTSTP, SIG_IGN);
if (optind < argc) tty = argv[optind];
if (tty || (tty = getenv("CONSOLE"))) {
@ -587,18 +597,28 @@ int main(int argc, char **argv)
* Ask for the password.
*/
while(pwd) {
int failed = 0;
if ((p = getpasswd(pwd->pw_passwd)) == NULL) break;
if (pwd->pw_passwd[0] == 0 ||
strcmp(crypt(p, pwd->pw_passwd), pwd->pw_passwd) == 0)
strcmp(crypt(p, pwd->pw_passwd), pwd->pw_passwd) == 0) {
sushell(pwd);
saved_sigquit = signal(SIGQUIT, SIG_IGN);
saved_sigtstp = signal(SIGTSTP, SIG_IGN);
saved_sigint = signal(SIGINT, SIG_IGN);
printf("Login incorrect.\n");
failed++;
}
signal(SIGQUIT, SIG_IGN);
signal(SIGTSTP, SIG_IGN);
signal(SIGINT, SIG_IGN);
if (failed) {
printf("Can not execute su shell.\n");
break;
} else
printf("Login incorrect.\n");
}
if (alarm_rised)
printf("Timed out.\n");
/*
* User pressed Control-D.
* User may pressed Control-D.
*/
return 0;
}