swapoff: cleanup usage() and includes
Signed-off-by: Karel Zak <kzak@redhat.com>
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@ -1,16 +1,6 @@
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#include <stdlib.h>
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#include <stdio.h>
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#include <getopt.h>
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#include <string.h>
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#include <mntent.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <fcntl.h>
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#include <stdint.h>
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#include <ctype.h>
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#include <getopt.h>
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#ifdef HAVE_SYS_SWAP_H
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# include <sys/swap.h>
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@ -71,16 +61,19 @@ static int swapoff_by_uuid(const char *uuid, int quiet)
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return special ? do_swapoff(special, quiet, CANONIC) : cannot_find(uuid);
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}
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static void usage(FILE *out, int n)
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static void __attribute__ ((__noreturn__)) usage(FILE * out)
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{
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fputs(_("\nUsage:\n"), out);
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fputs(USAGE_HEADER, out);
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fprintf(out, _(" %s [options] [<spec>]\n"), program_invocation_short_name);
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fputs(_("\nOptions:\n"), out);
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fputs(USAGE_OPTIONS, out);
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fputs(_(" -a, --all disable all swaps from /proc/swaps\n"
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" -h, --help display help and exit\n"
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" -v, --verbose verbose mode\n"
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" -V, --version display version and exit\n"), out);
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" -v, --verbose verbose mode\n"), out);
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fputs(USAGE_SEPARATOR, out);
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fputs(USAGE_HELP, out);
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fputs(USAGE_VERSION, out);
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fputs(_("\nThe <spec> parameter:\n" \
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" -L <label> LABEL of device to be used\n" \
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@ -88,8 +81,10 @@ static void usage(FILE *out, int n)
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" LABEL=<label> LABEL of device to be used\n" \
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" UUID=<uuid> UUID of device to be used\n" \
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" <device> name of device to be used\n" \
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" <file> name of file to be used\n\n"), out);
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exit(n);
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" <file> name of file to be used\n"), out);
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fprintf(out, USAGE_MAN_TAIL("swapoff(8)"));
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exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
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}
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static int swapoff_all(void)
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@ -155,7 +150,7 @@ int main(int argc, char *argv[])
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++all;
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break;
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case 'h': /* help */
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usage(stdout, 0);
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usage(stdout);
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break;
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case 'v': /* be chatty */
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++verbose;
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@ -169,17 +164,15 @@ int main(int argc, char *argv[])
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case 'U':
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add_uuid(optarg);
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break;
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case 0:
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break;
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case '?':
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default:
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usage(stderr, 1);
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usage(stderr);
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}
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}
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argv += optind;
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if (!all && !numof_labels() && !numof_uuids() && *argv == NULL)
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usage(stderr, 2);
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usage(stderr);
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mnt_init_debug(0);
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mntcache = mnt_new_cache();
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