thepigeongenerator/cpusetcores
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add help option

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This commit is contained in:
Quinn
2025-08-20 12:48:47 +02:00
parent d44235ce0f
commit 53472e6fc6
1 changed files with 15 additions and 2 deletions
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17
src/opts.c
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@@ -10,7 +10,7 @@ uint8_t getoptions(int32_t argc, char *const *argv, int32_t *ncpus) {
uint8_t opts = 0; uint8_t opts = 0;
char opt; char opt;
while ((opt = getopt(argc, argv, "lavi")) != -1) { while ((opt = getopt(argc, argv, "lavih")) != -1) {
switch (opt) { switch (opt) {
case 'l': case 'l':
if (opts & OPT_LIST_CORES) fatal("-%c has already been set", 'l'); if (opts & OPT_LIST_CORES) fatal("-%c has already been set", 'l');
@@ -29,7 +29,20 @@ uint8_t getoptions(int32_t argc, char *const *argv, int32_t *ncpus) {
opts |= OPT_INVERT; opts |= OPT_INVERT;
break; break;
case '?': case '?':
fatal("usage: %s [number] [-l] [-a] [-v] [-i]", argv[0]); printf("specify -h for help\n");
exit(EXIT_FAILURE);
case 'h':
printf(
"%s: a tool for turning on/off CPU threads\n"
"USAGE: %s [integer] [-l] [-a] [-v] [-i] [-h]\n"
"ARGUMENTS:\n"
"\t-l : List cores after executing the command. May be specified without integer.\n"
"\t-a : Writes to all cores, regardless of their state.\n"
"\t-v : Print the cores that are written. (implies -l)\n"
"\t-i : Instead of the given number.\n"
"\t-h : Shows this dialogue.\n",
argv[0], argv[0]);
exit(EXIT_SUCCESS);
} }
} }