diff options
Diffstat (limited to 'swu.c')
| -rw-r--r-- | swu.c | 65 |
1 files changed, 52 insertions, 13 deletions
@@ -1,3 +1,19 @@ +/* This file is part of swu + * Copyright (C) 2016 Sergey Poznyakoff + * + * Swu is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * Swu is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with swu. If not, see <http://www.gnu.org/licenses/>. + */ #include <unistd.h> #include <getopt.h> #include <stdio.h> @@ -10,7 +26,7 @@ char *pattern = "/proc/*/status"; int reverse; -int human; +int factor; int show_all; int show_total; int sizewidth = 8; @@ -187,7 +203,7 @@ cmp_size(struct swu const *a, struct swu const *b) return 0; } -static int (*cmp)(struct swu const *, struct swu const *) = cmp_pid; +static int (*cmp)(struct swu const *, struct swu const *) = cmp_size; static int compare(const void *a, const void *b) @@ -209,7 +225,7 @@ collect(char **argv) glob_t g; size_t i; - switch (glob (pattern, GLOB_NOSORT, globerrfunc, &g)) { + switch (glob(pattern, GLOB_NOSORT, globerrfunc, &g)) { case 0: break; case GLOB_NOSPACE: @@ -240,12 +256,12 @@ void printsize(off_t size) { static char *suf[] = { "", "K", "M", "G", NULL }; - if (human) { + if (factor) { int i; unsigned fract = 0; - for (i = 0; size > 1024 && suf[i+1]; i++) { - fract = size % 1024; - size /= 1024; + for (i = 0; size > factor && suf[i+1]; i++) { + fract = size % factor; + size /= factor; } if (fract) printf("% *jd.%01u%s", @@ -284,13 +300,30 @@ output(void) void help(void) { - //FIXME + printf("Usage: %s [OPTION]... [PROGNAME]...\n", progname); + puts("Summarize swap usage"); + putchar('\n'); + puts("-a, --all print all entries, including those with zero size"); + puts("--help produce this help output"); + puts("-h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G)"); + puts("-H, --si likewise, but use powers of 1000 not 1024"); + puts("-n, --name sort output by name"); + puts("-p, --pid sort output by PID"); + puts("-r, --reverse reverse sorting order"); + puts("-s, --size sort output by size (default)"); + puts("-c, -t, --total produce grand total"); + puts("-v, --verbose produce additional diagnostics"); + putchar('\n'); + puts("Report bugs to <gray@gnu.org>"); } +#define OPT_HELP 256 + struct option opt[] = { { "all", 0, NULL, 'a' }, - { "human-readable", 0, NULL, 'H' }, - { "help", 0, NULL, 'h' }, + { "help", 0, NULL, OPT_HELP }, + { "human-readable", 0, NULL, 'h' }, + { "si", 0, NULL, 'H' }, { "name", 0, NULL, 'n' }, { "pid", 0, NULL, 'p' }, { "reverse", 0, NULL, 'r' }, @@ -316,11 +349,11 @@ main(int argc, char **argv) show_all = 1; break; case 'H': - human = 1; + factor = 1000; break; case 'h': - help(); - exit(0); + factor = 1024; + break; case 'n': cmp = cmp_name; break; @@ -340,7 +373,13 @@ main(int argc, char **argv) case 'v': verbose++; break; + case OPT_HELP: + help(); + exit(0); default: + fprintf(stderr, + "try '%s --help' for more information.\n", + progname); exit(1); } } |