diff options
| -rw-r--r-- | miscutils/taskset.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/miscutils/taskset.c b/miscutils/taskset.c index 68b0fa6..94a0738 100644 --- a/miscutils/taskset.c +++ b/miscutils/taskset.c @@ -26,7 +26,7 @@ //kbuild:lib-$(CONFIG_TASKSET) += taskset.o //usage:#define taskset_trivial_usage -//usage: "[-p] [HEXMASK] [PID | PROG ARGS]" +//usage: "[-p] [HEXMASK] PID | PROG ARGS" //usage:#define taskset_full_usage "\n\n" //usage: "Set or get CPU affinity\n" //usage: "\n -p Operate on an existing PID" @@ -116,7 +116,7 @@ int taskset_main(int argc UNUSED_PARAM, char **argv) pid_t pid = 0; unsigned opt_p; const char *current_new; - char *aff = aff; /* for compiler */ + char *aff; /* NB: we mimic util-linux's taskset: -p does not take * an argument, i.e., "-pN" is NOT valid, only "-p N"! @@ -127,29 +127,28 @@ int taskset_main(int argc UNUSED_PARAM, char **argv) opt_p = getopt32(argv, "+p"); argv += optind; + aff = *argv++; if (opt_p) { - char *pid_str = *argv++; + char *pid_str = aff; if (*argv) { /* "-p <aff> <pid> ...rest.is.ignored..." */ - aff = pid_str; pid_str = *argv; /* NB: *argv != NULL in this case */ } /* else it was just "-p <pid>", and *argv == NULL */ pid = xatoul_range(pid_str, 1, ((unsigned)(pid_t)ULONG_MAX) >> 1); } else { - aff = *argv++; /* <aff> <cmd...> */ + /* <aff> <cmd...> */ if (!*argv) bb_show_usage(); } mask_size_in_bytes = SZOF_UL; - mask = NULL; current_new = "current"; print_aff: mask = get_aff(pid, &mask_size_in_bytes); if (opt_p) { printf("pid %d's %s affinity mask: "TASKSET_PRINTF_MASK"\n", pid, current_new, from_mask(mask, mask_size_in_bytes)); - if (!*argv) { + if (*argv == NULL) { /* Either it was just "-p <pid>", * or it was "-p <aff> <pid>" and we came here * for the second time (see goto below) */ @@ -166,8 +165,7 @@ int taskset_main(int argc UNUSED_PARAM, char **argv) aff += 2; if (!ENABLE_FEATURE_TASKSET_FANCY) { - /* Do not allow zero mask: */ - mask[0] = xstrtoul_range(aff, 16, 1, ULONG_MAX); + mask[0] = xstrtoul(aff, 16); } else { unsigned i; char *last_char; @@ -201,8 +199,8 @@ int taskset_main(int argc UNUSED_PARAM, char **argv) /* else: * We can error out here, but we don't. * For one, kernel itself ignores bits in mask[] - * which do not map to any CPUs. - * If mask has one 32-bit long, + * which do not map to any CPUs: + * if mask[] has one 32-bit long element, * but you have only 8 CPUs, all bits beyond first 8 * are ignored, silently. * No point in making bits past 31th to be errors. |