This patch does probably too much, but it's hard (and very cumbersome/time consuming) to break it out. What is does is this: * each command has one short description, e.g. "list MUX configuration" * made sure the short descriptions start lowercase * each command has one usage. That string contains just the options, e.g. "[-npn]". It's not part of the long help text. * that is, it doesn't say "[OPTIONS]" anymore, every usable option is listed by character in this (short) option string (the long description is in the long help text, as before) * help texts have been reworked, to make them - sometimes smaller - sometimes describe the options better - more often present themselves in a nicer format * all long help texts are now created with BUSYBOX_CMD_HELP_ macros, no more 'static const __maybe_unused char cmd_foobar_help[]' * made sure the long help texts starts uppercase * because cmdtp->name and cmdtp->opts together provide the new usage, all "Usage: foobar" texts have been removed from the long help texts * BUSYBOX_CMD_HELP_TEXT() provides the trailing newline by itself, this is nicer in the source code * BUSYBOX_CMD_HELP_OPT() provides the trailing newline by itself * made sure no line gets longer than 77 characters * delibertely renamed cmdtp->usage, so that we can get compile-time errors (e.g. in out-of-tree modules that use register_command() * the 'help' command can now always emit the usage, even without compiled long help texts * 'help -v' gives a list of commands with their short description, this is similar like the old "help" command before my patchset * 'help -a' gives out help of all commands Signed-off-by: Holger Schurig <holgerschurig@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
243 lines
4.8 KiB
C
243 lines
4.8 KiB
C
/*
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* test.c - sh like test
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*
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* Originally based on bareboxs do_test, but mostly reimplemented
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* for smaller binary size
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*
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* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <common.h>
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#include <command.h>
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#include <fs.h>
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#include <linux/stat.h>
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typedef enum {
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OPT_EQUAL,
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OPT_NOT_EQUAL,
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OPT_ARITH_EQUAL,
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OPT_ARITH_NOT_EQUAL,
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OPT_ARITH_GREATER_EQUAL,
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OPT_ARITH_GREATER_THAN,
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OPT_ARITH_LESS_EQUAL,
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OPT_ARITH_LESS_THAN,
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OPT_OR,
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OPT_AND,
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OPT_ZERO,
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OPT_NONZERO,
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OPT_DIRECTORY,
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OPT_FILE,
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OPT_EXISTS,
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OPT_SYMBOLIC_LINK,
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OPT_MAX,
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} test_opts;
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static char *test_options[] = {
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[OPT_EQUAL] = "=",
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[OPT_NOT_EQUAL] = "!=",
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[OPT_ARITH_EQUAL] = "-eq",
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[OPT_ARITH_NOT_EQUAL] = "-ne",
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[OPT_ARITH_GREATER_EQUAL] = "-ge",
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[OPT_ARITH_GREATER_THAN] = "-gt",
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[OPT_ARITH_LESS_EQUAL] = "-le",
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[OPT_ARITH_LESS_THAN] = "-lt",
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[OPT_OR] = "-o",
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[OPT_AND] = "-a",
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[OPT_ZERO] = "-z",
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[OPT_NONZERO] = "-n",
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[OPT_FILE] = "-f",
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[OPT_DIRECTORY] = "-d",
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[OPT_EXISTS] = "-e",
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[OPT_SYMBOLIC_LINK] = "-L",
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};
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static int parse_opt(const char *opt)
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{
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char **opts = test_options;
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int i;
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for (i = 0; i < OPT_MAX; i++) {
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if (!strcmp(opts[i], opt))
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return i;
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}
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return -1;
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}
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static int do_test(int argc, char *argv[])
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{
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char **ap;
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int left, adv, expr, last_expr, neg, last_cmp, opt, zero;
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ulong a, b;
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struct stat statbuf;
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if (*argv[0] == '[') {
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if (*argv[argc - 1] != ']') {
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printf("[: missing `]'\n");
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return 1;
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}
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argc--;
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}
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/* args? */
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if (argc < 2)
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return 1;
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last_expr = 0;
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left = argc - 1;
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ap = argv + 1;
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if (strcmp(ap[0], "!") == 0) {
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neg = 1;
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ap++;
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left--;
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} else
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neg = 0;
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expr = -1;
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last_cmp = -1;
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last_expr = -1;
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adv = 0;
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while (left - adv > 0) {
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ap += adv; left -= adv;
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adv = 1;
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opt = parse_opt(ap[0]);
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switch (opt) {
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/* one argument options */
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case OPT_OR:
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last_expr = expr;
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last_cmp = 0;
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continue;
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case OPT_AND:
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last_expr = expr;
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last_cmp = 1;
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continue;
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/* two argument options */
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case OPT_ZERO:
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case OPT_NONZERO:
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adv = 2;
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zero = 1;
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if (ap[1] && *ap[1] != ']' && strlen(ap[1]))
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zero = 0;
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expr = (opt == OPT_ZERO) ? zero : !zero;
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break;
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case OPT_FILE:
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case OPT_DIRECTORY:
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case OPT_EXISTS:
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case OPT_SYMBOLIC_LINK:
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adv = 2;
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if (ap[1] && *ap[1] != ']' && strlen(ap[1])) {
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expr = (opt == OPT_SYMBOLIC_LINK ? lstat : stat)(ap[1], &statbuf);
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if (expr < 0) {
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expr = 0;
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break;
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}
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expr = 0;
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if (opt == OPT_EXISTS) {
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expr = 1;
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break;
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}
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if (opt == OPT_FILE && S_ISREG(statbuf.st_mode)) {
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expr = 1;
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break;
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}
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if (opt == OPT_DIRECTORY && S_ISDIR(statbuf.st_mode)) {
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expr = 1;
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break;
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}
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if (opt == OPT_SYMBOLIC_LINK && S_ISLNK(statbuf.st_mode)) {
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expr = 1;
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break;
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}
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}
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break;
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/* three argument options */
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default:
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adv = 3;
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if (left < 3) {
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expr = 1;
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break;
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}
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a = simple_strtol(ap[0], NULL, 0);
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b = simple_strtol(ap[2], NULL, 0);
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switch (parse_opt(ap[1])) {
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case OPT_EQUAL:
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expr = strcmp(ap[0], ap[2]) == 0;
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break;
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case OPT_NOT_EQUAL:
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expr = strcmp(ap[0], ap[2]) != 0;
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break;
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case OPT_ARITH_EQUAL:
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expr = a == b;
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break;
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case OPT_ARITH_NOT_EQUAL:
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expr = a != b;
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break;
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case OPT_ARITH_LESS_THAN:
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expr = a < b;
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break;
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case OPT_ARITH_LESS_EQUAL:
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expr = a <= b;
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break;
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case OPT_ARITH_GREATER_THAN:
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expr = a > b;
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break;
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case OPT_ARITH_GREATER_EQUAL:
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expr = a >= b;
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break;
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default:
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expr = 1;
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goto out;
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}
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}
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if (last_cmp == 0)
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expr = last_expr || expr;
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else if (last_cmp == 1)
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expr = last_expr && expr;
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last_cmp = -1;
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}
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out:
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if (neg)
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expr = !expr;
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expr = !expr;
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return expr;
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}
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static const char *test_aliases[] = { "[", NULL};
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BAREBOX_CMD_HELP_START(test)
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BAREBOX_CMD_HELP_TEXT("Options:")
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BAREBOX_CMD_HELP_TEXT("\t!, =, !=, -eq, -ne, -ge, -gt, -le, -lt, -o, -a, -z, -n, -d, -e,")
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BAREBOX_CMD_HELP_TEXT("\t-f, -L; see 'man test' on your PC for more information.")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(test)
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.aliases = test_aliases,
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.cmd = do_test,
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BAREBOX_CMD_DESC("minimal test command like in /bin/sh")
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BAREBOX_CMD_OPTS("[EXPR]")
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BAREBOX_CMD_GROUP(CMD_GRP_SCRIPT)
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BAREBOX_CMD_HELP(cmd_test_help)
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BAREBOX_CMD_END
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