coreupdownd: add -X and -x1.1

Signed-off-by: Mattias Andrée <maandree@kth.se>

3 files changed, 87 insertions, 9 deletions

diff --git a/coreupdown.c b/coreupdown.c
index 500839f..283a1de 100644
--- a/coreupdown.c
+++ b/coreupdown.c
@@ -19,11 +19,11 @@
 char *argv0;
 static volatile sig_atomic_t caught_sighup = 0;
 
-#define coreup() coreupdown(ULONG_MAX)
-#define coredown() coreupdown(1)
+#define coreup(POSTCOMMAND) coreupdown(ULONG_MAX, (POSTCOMMAND))
+#define coredown(POSTCOMMAND) coreupdown(1, (POSTCOMMAND))
 
 static int
-coreupdown(unsigned long int count)
+coreupdown(unsigned long int count, const char *postcommand)
 {
 	char path[sizeof("/sys/devices/system/cpu/cpu/online") + 3 * sizeof(count)];
 	unsigned long int i;
@@ -49,7 +49,14 @@ coreupdown(unsigned long int count)
 		}
 		close(fd);
 	}
-	return -(have_failure && !have_success);
+
+	if (have_failure && !have_success)
+		return -1;
+
+	if (postcommand)
+		system(postcommand);
+
+	return 0;
 }
 
 static void
@@ -70,6 +77,8 @@ daemon_usage(const char *command)
 	                "[-t coredown-cpu-usage-time-consistency-threshold] "
 	                "[-U coreup-cpu-usage-threshold] "
 	                "[-u coredown-cpu-usage-threshold] "
+	                "[-X post-coreup-command] "
+	                "[-x post-coredown-command] "
 	                "[-ef]\n", command);
 }
 
@@ -99,7 +108,7 @@ oneshot_main(int argc, char **argv, unsigned long int count)
 		argc--;
 	}
 
-	return -coreupdown(count);
+	return -coreupdown(count, NULL);
 }
 
 static int
@@ -506,9 +515,11 @@ load_configurations(const char *file, int optional,
                     unsigned int *coreup_threshold_cpu, unsigned int *coredown_threshold_cpu,
                     unsigned int *coreup_threshold_time, unsigned int *coredown_threshold_time,
                     unsigned int *coreup_cooldown, unsigned int *coredown_cooldown,
-                    unsigned int *daemon_interval_sec, unsigned long int *daemon_interval_nsec)
+                    unsigned int *daemon_interval_sec, unsigned long int *daemon_interval_nsec,
+                    char **post_coreup_command, char **post_coredown_command)
 {
 	unsigned int *uintp;
+	char **strp;
 	unsigned long int tmp;
 	int fd;
 	FILE *f;
@@ -582,8 +593,38 @@ load_configurations(const char *file, int optional,
 			*uintp = (unsigned int)tmp;
 
 		continue;
+
 	not_uint:
+		if (OPTION("post-coreup-command"))
+			strp = post_coreup_command;
+		else if (OPTION("post-coredown-command"))
+			strp = post_coredown_command;
+		else
+			goto not_str;
 
+		s = &s[n];
+		while (isspace(*s))
+			s++;
+		if (*s != '=')
+			goto invalid;
+		s++;
+		while (isspace(*s))
+			s++;
+		p = rstrip(s);
+		pc = *p;
+		*p = 0;
+
+		if (strp) {
+			*strp = strdup(s);
+			if (!*strp) {
+				fprintf(stderr, "%s: strdup: %s\n", argv0, strerror(errno));
+				exit(1);
+			}
+		}
+
+		continue;
+
+	not_str:
 		if (!OPTION("check-interval"))
 			goto invalid;
 
@@ -672,6 +713,7 @@ daemon_main(int argc, char **argv, int orig_argc, char **orig_argv, int reexeced
 	unsigned int coreup_cooldown, coredown_cooldown;
 	unsigned int daemon_interval_sec, *uintp;
 	unsigned long int daemon_interval_nsec, tmp;
+	char *post_coreup_command = NULL, *post_coredown_command = NULL;
 	int have_coreup_threshold_cpu = 0, have_coredown_threshold_cpu = 0;
 	int have_coreup_threshold_time = 0, have_coredown_threshold_time = 0;
 	int have_coreup_cooldown = 0, have_coredown_cooldown = 0;
@@ -721,6 +763,18 @@ restart:
 		have_daemon_interval = 1;
 		break;
 
+	case 'X':
+		post_coreup_command = ARGNULL();
+		if (!post_coreup_command)
+			goto usage;
+		break;
+
+	case 'x':
+		post_coredown_command = ARGNULL();
+		if (!post_coredown_command)
+			goto usage;
+		break;
+
 	case 'e':
 		keep_stderr = 1;
 		break;
@@ -788,7 +842,9 @@ restart:
 	                    have_coreup_cooldown ? NULL : &coreup_cooldown,
 	                    have_coredown_cooldown ? NULL : &coredown_cooldown,
 	                    have_daemon_interval ? NULL : &daemon_interval_sec,
-	                    have_daemon_interval ? NULL : &daemon_interval_nsec);
+	                    have_daemon_interval ? NULL : &daemon_interval_nsec,
+	                    post_coreup_command ? NULL : &post_coreup_command,
+	                    post_coredown_command ? NULL : &post_coredown_command);
 
 	if (coreup_threshold_cpu > 100) {
 		fprintf(stderr, "%s: CPU usage threshold for coreup was above 100, setting to 100\n", argv0);
@@ -860,7 +916,7 @@ restart:
 			down_time = 0;
 			if (up_time++ >= coreup_threshold_time) {
 				cooldown = coreup_cooldown;
-				if (coreup())
+				if (coreup(post_coreup_command))
 					return 1;
 				up_time = 0;
 			}
@@ -868,7 +924,7 @@ restart:
 			up_time = 0;
 			if (down_time++ >= coredown_threshold_time) {
 				cooldown = coredown_cooldown;
-				if (coredown())
+				if (coredown(post_coredown_command))
 					return 1;
 				down_time = 0;
 			}
diff --git a/coreupdownd.1 b/coreupdownd.1
index f366464..7d59db3 100644
--- a/coreupdownd.1
+++ b/coreupdownd.1
@@ -11,6 +11,8 @@ coreupdownd - Dynamically enable and disable CPU's to only use one during low CP
 .RI "[-t " coredown-cpu-usage-time-consistency-threshold ]
 .RI "[-U " coreup-cpu-usage-threshold ]
 .RI "[-u " coredown-cpu-usage-threshold ]
+.RI "[-X " post-coreup-command ]
+.RI "[-x " post-coredown-command ]
 [-ef]
 .SH DESCRIPTION
 The
@@ -89,6 +91,20 @@ daemon may enable all CPU's.
 .BI "-u " coredown-cpu-usage-threshold
 The required CPU usage (integer upper bound) before the
 daemon may disable all CPU's except the main core.
+.TP
+.BI "-X " post-coreup-command
+Run
+.I post-coreup-command
+in
+.BR sh (1)
+after each time all CPU's are enabled.
+.TP
+.BI "-x " post-coredown-command
+Run
+.I post-coredown-command
+in
+.BR sh (1)
+after each time all non-main CPU's are disabled.
 .SH OPERANDS
 No operands are supported.
 .SH STDIN
diff --git a/coreupdownd.conf.5 b/coreupdownd.conf.5
index 3e8759c..961de41 100644
--- a/coreupdownd.conf.5
+++ b/coreupdownd.conf.5
@@ -49,6 +49,12 @@ coredown-cooldown-time
 .TP
 *
 check-interval
+.TP
+*
+post-coreup-command
+.TP
+*
+post-coredown-command
 .SH NOTES
 None.
 .SH SEE ALSO