ericonr
/
util-linux
mirror of https://github.com/ericonr/util-linux.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

schedutils: fix chrt docs and pid=0 usage 

Fix some documentation bugs for chrt.
Make it work with PID 0, which means current process.

Signed-off-by: Matthias Koenig <mkoenig@suse.de>
This commit is contained in:
Matthias Koenig 2007-07-16 13:10:59 +02:00 committed by Karel Zak
parent dfcd918b6e
commit 697d58e867
2 changed files with 9 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
schedutils/chrt.1
View File

@ -79,13 +79,13 @@ output version information and exit
.SH USAGE
.TP
The default behavior is to run a new command::
chrt [prio] [command] [arguments]
chrt prio command [arguments]
.TP
You can also retrieve the real-time attributes of an existing task:
chrt -p [pid]
chrt -p pid
.TP
Or set them:
chrt -p [prio] [pid]
chrt -p prio pid
.SH PERMISSIONS
A user must possess
.BR CAP_SYS_NICE

10
schedutils/chrt.c
View File

@ -46,7 +46,7 @@ static void show_usage(const char *cmd)
fprintf(stderr, " -b, --batch "
"set policy to SCHED_BATCH\n");
fprintf(stderr, " -f, --fifo "
"set policy to SCHED_FF\n");
"set policy to SCHED_FIFO\n");
fprintf(stderr, " -p, --pid "
"operate on existing given pid\n");
fprintf(stderr, " -m, --max "
@ -146,7 +146,7 @@ int main(int argc, char *argv[])
{
int i, policy = SCHED_RR, priority = 0, verbose = 0;
struct sched_param sp;
pid_t pid = 0;
pid_t pid = -1;
struct option longopts[] = {
{ "batch", 0, NULL, 'b' },
@ -205,12 +205,12 @@ int main(int argc, char *argv[])
}
if ((pid && argc - optind < 1) || (!pid && argc - optind < 2)) {
if (((pid > -1) && argc - optind < 1) || ((pid == -1) && argc - optind < 2)) {
show_usage(argv[0]);
return 1;
}
if (pid && (verbose || argc - optind == 1)) {
if ((pid > -1) && (verbose || argc - optind == 1)) {
show_rt_info("current", pid);
if (argc - optind == 1)
return 0;
@ -224,6 +224,8 @@ int main(int argc, char *argv[])
return 1;
}
if (pid == -1)
pid = 0;
sp.sched_priority = priority;
if (sched_setscheduler(pid, policy, &sp) == -1) {
perror("sched_setscheduler");