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Adding changes from Matt McKenna... added -n option(never restart), -d option (specify delay), sleep for 600 secs instead of exiting, and wake up process if sleeping via a sigalarm.

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This commit is contained in:
Jason Hancock 2007-04-30 16:57:47 +00:00
parent 01c1c6ce59
commit 144c21640a
1 changed files with 76 additions and 14 deletions
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90
direct/src/autorestart/autorestart.c
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@ -16,7 +16,7 @@
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include "dtool_config.h"
/*#include "dtool_config.h"*/
#include "dtoolbase.h"
#ifndef HAVE_GETOPT
@ -44,13 +44,21 @@ char **params = NULL;
char *logfile_name = NULL;
int logfile_fd = -1;
int stop_on_terminate = 0;
int stop_always = 0;
char *respawn_script = NULL;
int respawn_count_time = 0;
/* If requested, delay these many seconds between restart attempts */
int respawn_delay_time = 5;
/* We shouldn't respawn more than (spam_respawn_count - 1) times over
spam_respawn_time seconds. */
int spam_respawn_count = 5;
int spam_respawn_time = 30;
int spam_respawn_time = 60;
int spam_restart_delay_time = 600; /* Optionally, do not exit if we spam too much; simply sleep for this many seconds*/
pid_t child_pid = 0;
@ -228,6 +236,11 @@ sigterm_handler() {
exit(1);
}
void
sigalarm_handler() {
fprintf(stderr, "sleep epoch was complete.\n");
}
void
do_autorestart() {
char time_buffer[TIME_BUFFER_SIZE];
@ -277,6 +290,10 @@ do_autorestart() {
if (respawn_script != NULL) {
invoke_respawn_script(now);
}
if (respawn_delay_time) {
sleep(respawn_delay_time);
}
/* Make sure we're not respawning too fast. */
if (spam_respawn_count > 1) {
@ -286,12 +303,23 @@ do_autorestart() {
num_sri++;
} else {
time_t last = spam_respawn[(sri + 1) % spam_respawn_count];
if (now - last < spam_respawn_time) {
if (now - last < spam_respawn_time && !spam_restart_delay_time) {
fprintf(stderr, "respawning too fast, giving up.\n");
break;
} else {
fprintf(stderr, "respawning too fast, will sleep for %d seconds.\n", spam_restart_delay_time);
signal (SIGALRM, sigalarm_handler);
alarm(spam_restart_delay_time);
pause();
signal (SIGALRM, SIG_IGN);
}
}
}
if (stop_always) {
fprintf(stderr, "instructed to not autorestart, exiting.\n");
break;
}
strftime(time_buffer, TIME_BUFFER_SIZE, "%T on %A, %d %b %Y", localtime(&now));
fprintf(stderr, "respawning at %s.\n", time_buffer);
@ -383,6 +411,12 @@ help() {
" Route stdout and stderr from the child process into the indicated\n"
" log file.\n\n"
" -n\n"
" Do not attempt to restart the process under any circumstance.\n"
" The program can still be used to execute a script on abnormal\n"
" process termination.\n\n"
" -t\n"
" Stop on terminate: don't restart if the child process exits\n"
" normally or is killed with a SIGTERM. With this flag, the\n"
@ -391,12 +425,12 @@ help() {
" than SIGTERM. Without this flag, the default behavior is to\n"
" restarted the child process if it exits for any reason.\n\n"
" -r count,secs\n"
" Give up if the process respawns 'count' times within 'secs'\n"
" seconds. This is designed to prevent respawning from using\n"
" too many system resources if something is wrong with the child\n"
" process. The default value is %d,%d. Use -r 0,0 to disable\n"
" this feature.\n\n"
" -r count,secs,sleep\n"
" Sleep 'sleep' seconds if the process respawns 'count' times\n"
" within 'secs' seconds. This is designed to prevent respawning\n"
" from using too many system resources if something is wrong with\n"
" the child process. The default value is %d,%d,%d. Use -r 0,0,0\n"
" to disable this feature.\n\n"
" -s \"command\"\n"
" Run the indicated command or script each time the process is\n"
@ -411,22 +445,38 @@ help() {
" for the purposes of passing an argument to the script named with\n"
" -s.\n\n"
" -d secs\n"
" Specifies the number of seconds to delay for between restarts.\n"
" The default is %d.\n\n"
" -h\n"
" Output this help information.\n\n",
spam_respawn_count, spam_respawn_time);
spam_respawn_count, spam_respawn_time, spam_restart_delay_time, respawn_delay_time);
}
void
parse_int_pair(char *param, int *a, int *b) {
char *comma = strchr(param, ',');
parse_int_triplet(char *param, int *a, int *b, int *c) {
char *comma;
char *comma2;
comma = strchr(param, ',');
if (comma == NULL) {
fprintf(stderr, "Comma required: %s\n", param);
exit(1);
}
comma2 = strchr(comma+1, ',');
if (comma2 == NULL) {
fprintf(stderr, "Second comma required: %s\n", param);
exit(1);
}
*comma = '\0';
*comma2 = '\0';
*a = atoi(param);
*b = atoi(comma + 1);
*c = atoi(comma2 + 1);
}
int
@ -434,7 +484,7 @@ main(int argc, char *argv[]) {
extern char *optarg;
extern int optind;
/* The initial '+' instructs GNU getopt not to reorder switches. */
static const char *optflags = "+l:tr:s:c:h";
static const char *optflags = "+l:ntr:s:c:d:wh";
int flag;
flag = getopt(argc, argv, optflags);
@ -444,12 +494,20 @@ main(int argc, char *argv[]) {
logfile_name = optarg;
break;
case 'n':
stop_always = 1;
break;
case 't':
stop_on_terminate = 1;
break;
case 'r':
parse_int_pair(optarg, &spam_respawn_count, &spam_respawn_time);
parse_int_triplet(optarg, &spam_respawn_count, &spam_respawn_time, &spam_restart_delay_time);
break;
case 'w':
spam_restart_delay_time = atoi(optarg);
break;
case 's':
@ -460,6 +518,10 @@ main(int argc, char *argv[]) {
respawn_count_time = atoi(optarg);
break;
case 'd':
respawn_delay_time = atoi(optarg);
break;
case 'h':
help();
return 1;