diff options
| -rw-r--r-- | util-linux/chrt.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/util-linux/chrt.c b/util-linux/chrt.c index 51d08584e..f64fa6aa6 100644 --- a/util-linux/chrt.c +++ b/util-linux/chrt.c @@ -17,9 +17,9 @@ //kbuild:lib-$(CONFIG_CHRT) += chrt.o //usage:#define chrt_trivial_usage -//usage: "-m | -p [PRIO] PID | [-rfobi] PRIO PROG ARGS" +//usage: "-m | [-rfobi] { -p [PRIO] PID | PRIO PROG ARGS }" //usage:#define chrt_full_usage "\n\n" -//usage: "Change scheduling priority and class for a process\n" +//usage: "Change scheduling priority and class (default RR) for a process\n" //usage: "\n -m Show min/max priorities" //usage: "\n -p Operate on PID" //usage: "\n -r Set SCHED_RR class" @@ -133,7 +133,14 @@ int chrt_main(int argc UNUSED_PARAM, char **argv) pid_str = *argv; } /* else "-p PID", and *argv == NULL */ - pid = xatoul_range(pid_str, 1, ((unsigned)(pid_t)ULONG_MAX) >> 1); + pid = xatoul_range(pid_str, 0, ((unsigned)(pid_t)ULONG_MAX) >> 1); + + /* sched_{get,set}scheduler accept PID 0 to mean the calling process, + * but this is needed to display the actual PID like util-linux's chrt + */ + if (pid == 0) { + pid = getpid(); + } } else { priority = *argv++; if (!*argv) |