author | kergoth <kergoth> | 2003-08-09 17:42:14 (UTC) |
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committer | kergoth <kergoth> | 2003-08-09 17:42:14 (UTC) |
commit | 1ab4ca95e4d2cf24d32b38c9031cb6076351e730 (patch) (side-by-side diff) | |
tree | 644d196b01c7f280981bd17da23c7592a18e5643 /core/opiealarm/opiealarm.c | |
parent | ec14206f63dd93e9fb84c76cbc76fc1968637590 (diff) | |
download | opie-1ab4ca95e4d2cf24d32b38c9031cb6076351e730.zip opie-1ab4ca95e4d2cf24d32b38c9031cb6076351e730.tar.gz opie-1ab4ca95e4d2cf24d32b38c9031cb6076351e730.tar.bz2 |
Merge from BRANCH_1_0
-rw-r--r-- | core/opiealarm/opiealarm.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/core/opiealarm/opiealarm.c b/core/opiealarm/opiealarm.c index 998cabd..90a743f 100644 --- a/core/opiealarm/opiealarm.c +++ b/core/opiealarm/opiealarm.c @@ -72,48 +72,49 @@ void usage ( void ) } int fork_with_pidfile ( void ) { FILE *fp; pid_t pid; pid = fork ( ); if ( pid > 0 ) { // We can not just exit now, because the kernel could suspend // the iPAQ just before the child process sets the RTC. // Solution: just wait for SIGUSR1 - the child process will // signal this when it thinks it is safe to exit. signal ( SIGUSR1, sig_handler_parent ); while ( 1 ) sleep ( 1000 ); exit ( 0 ); } else if ( pid < 0 ) { perror ( "forking failed" ); return 0; } + // sleep( 60 ); // child process needs to react to SIGUSR2. This is sent when // a new opiealarm process is started. signal ( SIGUSR2, sig_handler_child ); // save pid if (( fp = fopen ( PIDFILE, "w" ))) { fprintf ( fp, "%d", getpid ( )); fclose ( fp ); // detach close ( 0 ); close ( 1 ); close ( 2 ); setpgid ( 0, 0 ); return 1; } else { perror ( PIDFILE ); return 0; } @@ -185,49 +186,49 @@ int main ( int argc, char **argv ) usage ( ); parent_pid = getpid ( ); // kill running opiealarm opiealarm_was_running = kill_with_pidfile ( ); remove_pidfile ( ); switch ( mode ) { case 'r': opt = resume ( ac_resusp ); break; case 's': default : opt = suspend ( fix_rtc ); break; } parent_pid = 0; return opt; } int suspend ( int fix_rtc ) { - FILE *fp; + FILE *fp = NULL; char buf [64]; time_t alrt, syst, rtct; struct tm alr, sys, rtc; int fd; int rtc_sys_diff; if ( !fork_with_pidfile ( )) return 3; // we are the child process from here on ... tzset ( ); // not sure if it is really needed -- it probably doesn't hurt ... time ( &syst );// get the UNIX system time sys = *localtime ( &syst ); do { if (( fd = open ( "/dev/misc/rtc", O_RDWR )) < 0 ) if (( fd = open ( "/dev/rtc", O_RDWR )) < 0 ) break; // ( 1, "rtc" ); memset ( &rtc, 0, sizeof ( struct tm )); // get the RTC time @@ -237,49 +238,49 @@ int suspend ( int fix_rtc ) rtct = mktime ( &rtc ); rtc_sys_diff = ( syst - rtct ) - sys. tm_gmtoff; // calculate the difference between system and hardware time if ( fix_rtc && (( rtc_sys_diff < -3 ) || ( rtc_sys_diff > 3 ))) { struct tm set; set = *gmtime ( &syst ); // if the difference between system and hardware time is more than 3 seconds, // we have to set the RTC (hwclock --systohc), or alarms won't work reliably. if ( ioctl ( fd, RTC_SET_TIME, &set ) < 0 ) break; // ( 1, "ioctl RTC_SET_TIME" ); } // read the wakeup time from TIMEFILE if (!( fp = fopen ( TIMEFILE, "r" ))) break; // ( 1, TIMEFILE ); if ( !fgets ( buf, sizeof( buf ) - 1, fp )) break; // ( 1, TIMEFILE ); fclose ( fp ); - fp = 0; + fp = NULL; alrt = atoi ( buf ); // get the alarm time if ( alrt == 0 ) break; // ( 0, TIMEFILE " contains an invalid time description" ); alrt -= 5; // wake up 5 sec before the specified time alr = *gmtime ( &alrt ); if ( ioctl ( fd, RTC_ALM_SET, &alr ) < 0 ) // set RTC alarm time break; // ( 1, "ioctl RTC_ALM_SET" ); if ( ioctl ( fd, RTC_AIE_ON, 0 ) < 0 ) break; // ( 1, "ioctl RTC_AIE_ON" ); // enable RTC alarm irq // tell the parent it is safe to exit now .. we have set the RTC alarm kill ( parent_pid, SIGUSR1 ); if ( read ( fd, buf, sizeof( unsigned long )) < 0 ) // wait for the RTC alarm irq break; // ( 1, "read rtc alarm" ); // iPAQ woke up via RTC irq -- otherwise we would have received a SIGUSR2 // from the "resume instance" of opiealarm. |