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cpupower: use man(1) when calling "cpupower help subcommand"

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Instead of printing something non-formatted to stdout, call
man(1) to show the man page for the proper subcommand.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Dominik Brodowski
2011-08-06 18:11:43 +02:00
parent 47c336307a
commit 498ca793d9
11 changed files with 86 additions and 228 deletions
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29
tools/power/cpupower/utils/cpufreq-set.c
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@@ -20,34 +20,11 @@
#define NORM_FREQ_LEN 32
void freq_set_help(void)
{
printf(_("Usage: cpupower frequency-set [options]\n"));
printf(_("Options:\n"));
printf(_(" -d FREQ, --min FREQ new minimum CPU frequency the governor may select\n"));
printf(_(" -u FREQ, --max FREQ new maximum CPU frequency the governor may select\n"));
printf(_(" -g GOV, --governor GOV new cpufreq governor\n"));
printf(_(" -f FREQ, --freq FREQ specific frequency to be set. Requires userspace\n"
" governor to be available and loaded\n"));
printf(_(" -r, --related Switches all hardware-related CPUs\n"));
printf(_(" -h, --help Prints out this screen\n"));
printf("\n");
printf(_("Notes:\n"
"1. Omitting the -c or --cpu argument is equivalent to setting it to \"all\"\n"));
printf(_("2. The -f FREQ, --freq FREQ parameter cannot be combined with any other parameter\n"
" except the -c CPU, --cpu CPU parameter\n"
"3. FREQuencies can be passed in Hz, kHz (default), MHz, GHz, or THz\n"
" by postfixing the value with the wanted unit name, without any space\n"
" (FREQuency in kHz =^ Hz * 0.001 =^ MHz * 1000 =^ GHz * 1000000).\n"));
}
static struct option set_opts[] = {
{ .name = "min", .has_arg = required_argument, .flag = NULL, .val = 'd'},
{ .name = "max", .has_arg = required_argument, .flag = NULL, .val = 'u'},
{ .name = "governor", .has_arg = required_argument, .flag = NULL, .val = 'g'},
{ .name = "freq", .has_arg = required_argument, .flag = NULL, .val = 'f'},
{ .name = "help", .has_arg = no_argument, .flag = NULL, .val = 'h'},
{ .name = "related", .has_arg = no_argument, .flag = NULL, .val='r'},
{ },
};
@@ -80,7 +57,6 @@ const struct freq_units def_units[] = {
static void print_unknown_arg(void)
{
printf(_("invalid or unknown argument\n"));
freq_set_help();
}
static unsigned long string_to_frequency(const char *str)
@@ -231,14 +207,11 @@ int cmd_freq_set(int argc, char **argv)
/* parameter parsing */
do {
ret = getopt_long(argc, argv, "d:u:g:f:hr", set_opts, NULL);
ret = getopt_long(argc, argv, "d:u:g:f:r", set_opts, NULL);
switch (ret) {
case '?':
print_unknown_arg();
return -EINVAL;
case 'h':
freq_set_help();
return 0;
case -1:
cont = 0;
break;