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Diffstat (limited to 'sys-utils/chcpu.c')
-rw-r--r--sys-utils/chcpu.c99
1 files changed, 67 insertions, 32 deletions
diff --git a/sys-utils/chcpu.c b/sys-utils/chcpu.c
index 1162888d5..ada0eaacc 100644
--- a/sys-utils/chcpu.c
+++ b/sys-utils/chcpu.c
@@ -45,6 +45,9 @@
#define EXCL_ERROR "--{configure,deconfigure,disable,dispatch,enable}"
+/* partial success, otherwise we return regular EXIT_{SUCCESS,FAILURE} */
+#define CHCPU_EXIT_SOMEOK 64
+
#define _PATH_SYS_CPU "/sys/devices/system/cpu"
#define _PATH_SYS_CPU_ONLINE _PATH_SYS_CPU "/online"
#define _PATH_SYS_CPU_RESCAN _PATH_SYS_CPU "/rescan"
@@ -66,21 +69,28 @@ enum {
CMD_CPU_DISPATCH_VERTICAL,
};
+/* returns: 0 = success
+ * < 0 = failure
+ * > 0 = partial success
+ */
static int cpu_enable(cpu_set_t *cpu_set, size_t setsize, int enable)
{
unsigned int cpu;
int online, rc;
int configured = -1;
+ size_t fails = 0;
for (cpu = 0; cpu < setsize; cpu++) {
if (!CPU_ISSET(cpu, cpu_set))
continue;
if (!path_exist(_PATH_SYS_CPU "/cpu%d", cpu)) {
- printf(_("CPU %d does not exist\n"), cpu);
+ warnx(_("CPU %d does not exist"), cpu);
+ fails++;
continue;
}
if (!path_exist(_PATH_SYS_CPU "/cpu%d/online", cpu)) {
- printf(_("CPU %d is not hot pluggable\n"), cpu);
+ warnx(_("CPU %d is not hot pluggable"), cpu);
+ fails++;
continue;
}
online = path_read_s32(_PATH_SYS_CPU "/cpu%d/online", cpu);
@@ -96,30 +106,33 @@ static int cpu_enable(cpu_set_t *cpu_set, size_t setsize, int enable)
configured = path_read_s32(_PATH_SYS_CPU "/cpu%d/configure", cpu);
if (enable) {
rc = path_write_str("1", _PATH_SYS_CPU "/cpu%d/online", cpu);
- if ((rc == -1) && (configured == 0))
- warnx(_("CPU %d enable failed "
- "(CPU is deconfigured)"), cpu);
- else if (rc == -1)
+ if ((rc == -1) && (configured == 0)) {
+ warn(_("CPU %d enable failed (CPU is deconfigured)"), cpu);
+ fails++;
+ } else if (rc == -1) {
warn(_("CPU %d enable failed"), cpu);
- else
+ fails++;
+ } else
printf(_("CPU %d enabled\n"), cpu);
} else {
if (onlinecpus && num_online_cpus() == 1) {
- printf(_("CPU %d disable failed "
- "(last enabled CPU)\n"), cpu);
+ warnx(_("CPU %d disable failed (last enabled CPU)"), cpu);
+ fails++;
continue;
}
rc = path_write_str("0", _PATH_SYS_CPU "/cpu%d/online", cpu);
- if (rc == -1)
+ if (rc == -1) {
warn(_("CPU %d disable failed"), cpu);
- else {
+ fails++;
+ } else {
printf(_("CPU %d disabled\n"), cpu);
if (onlinecpus)
CPU_CLR(cpu, onlinecpus);
}
}
}
- return EXIT_SUCCESS;
+
+ return fails == 0 ? 0 : fails == setsize ? -1 : 1;
}
static int cpu_rescan(void)
@@ -129,7 +142,7 @@ static int cpu_rescan(void)
if (path_write_str("1", _PATH_SYS_CPU_RESCAN) == -1)
err(EXIT_FAILURE, _("Failed to trigger rescan of CPUs"));
printf(_("Triggered rescan of CPUs\n"));
- return EXIT_SUCCESS;
+ return 0;
}
static int cpu_set_dispatch(int mode)
@@ -146,23 +159,30 @@ static int cpu_set_dispatch(int mode)
err(EXIT_FAILURE, _("Failed to set vertical dispatch mode"));
printf(_("Successfully set vertical dispatching mode\n"));
}
- return EXIT_SUCCESS;
+ return 0;
}
+/* returns: 0 = success
+ * < 0 = failure
+ * > 0 = partial success
+ */
static int cpu_configure(cpu_set_t *cpu_set, size_t setsize, int configure)
{
unsigned int cpu;
int rc, current;
+ size_t fails = 0;
for (cpu = 0; cpu < setsize; cpu++) {
if (!CPU_ISSET(cpu, cpu_set))
continue;
if (!path_exist(_PATH_SYS_CPU "/cpu%d", cpu)) {
- printf(_("CPU %d does not exist\n"), cpu);
+ warnx(_("CPU %d does not exist"), cpu);
+ fails++;
continue;
}
if (!path_exist(_PATH_SYS_CPU "/cpu%d/configure", cpu)) {
- printf(_("CPU %d is not configurable\n"), cpu);
+ warnx(_("CPU %d is not configurable"), cpu);
+ fails++;
continue;
}
current = path_read_s32(_PATH_SYS_CPU "/cpu%d/configure", cpu);
@@ -176,25 +196,28 @@ static int cpu_configure(cpu_set_t *cpu_set, size_t setsize, int configure)
}
if ((current == 1) && (configure == 0) && onlinecpus &&
is_cpu_online(cpu)) {
- printf(_("CPU %d deconfigure failed "
- "(CPU is enabled)\n"), cpu);
+ warnx(_("CPU %d deconfigure failed (CPU is enabled)"), cpu);
+ fails++;
continue;
}
if (configure) {
rc = path_write_str("1", _PATH_SYS_CPU "/cpu%d/configure", cpu);
- if (rc == -1)
+ if (rc == -1) {
warn(_("CPU %d configure failed"), cpu);
- else
+ fails++;
+ } else
printf(_("CPU %d configured\n"), cpu);
} else {
rc = path_write_str("0", _PATH_SYS_CPU "/cpu%d/configure", cpu);
- if (rc == -1)
+ if (rc == -1) {
warn(_("CPU %d deconfigure failed"), cpu);
- else
+ fails++;
+ } else
printf(_("CPU %d deconfigured\n"), cpu);
}
}
- return EXIT_SUCCESS;
+
+ return fails == 0 ? 0 : fails == setsize ? -1 : 1;
}
static void cpu_parse(char *cpu_string, cpu_set_t *cpu_set, size_t setsize)
@@ -233,7 +256,7 @@ int main(int argc, char *argv[])
cpu_set_t *cpu_set;
size_t setsize;
int cmd = -1;
- int c;
+ int c, rc;
static const struct option longopts[] = {
{ "configure", required_argument, 0, 'c' },
@@ -317,19 +340,31 @@ int main(int argc, char *argv[])
switch (cmd) {
case CMD_CPU_ENABLE:
- return cpu_enable(cpu_set, maxcpus, 1);
+ rc = cpu_enable(cpu_set, maxcpus, 1);
+ break;
case CMD_CPU_DISABLE:
- return cpu_enable(cpu_set, maxcpus, 0);
+ rc = cpu_enable(cpu_set, maxcpus, 0);
+ break;
case CMD_CPU_CONFIGURE:
- return cpu_configure(cpu_set, maxcpus, 1);
+ rc = cpu_configure(cpu_set, maxcpus, 1);
+ break;
case CMD_CPU_DECONFIGURE:
- return cpu_configure(cpu_set, maxcpus, 0);
+ rc = cpu_configure(cpu_set, maxcpus, 0);
+ break;
case CMD_CPU_RESCAN:
- return cpu_rescan();
+ rc = cpu_rescan();
+ break;
case CMD_CPU_DISPATCH_HORIZONTAL:
- return cpu_set_dispatch(0);
+ rc = cpu_set_dispatch(0);
+ break;
case CMD_CPU_DISPATCH_VERTICAL:
- return cpu_set_dispatch(1);
+ rc = cpu_set_dispatch(1);
+ break;
+ default:
+ rc = -EINVAL;
+ break;
}
- return EXIT_SUCCESS;
+
+ return rc == 0 ? EXIT_SUCCESS :
+ rc < 0 ? EXIT_FAILURE : CHCPU_EXIT_SOMEOK;
}
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