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Annotation of prex-old/usr/bin/cmdbox/main.c, Revision 1.1

1.1     ! nbrk        1: /*
        !             2:  * Copyright (c) 2005-2006, Kohsuke Ohtani
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. Neither the name of the author nor the names of any co-contributors
        !            14:  *    may be used to endorse or promote products derived from this software
        !            15:  *    without specific prior written permission.
        !            16:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            27:  * SUCH DAMAGE.
        !            28:  */
        !            29:
        !            30: #include <prex/prex.h>
        !            31: #include <sys/utsname.h>
        !            32: #include <sys/ioctl.h>
        !            33:
        !            34: #include <limits.h>
        !            35: #include <ctype.h>
        !            36: #include <unistd.h>
        !            37: #include <string.h>
        !            38: #include <stdlib.h>
        !            39: #include <stdio.h>
        !            40: #include <libgen.h>
        !            41:
        !            42: #include "cmdbox.h"
        !            43:
        !            44: #ifdef CONFIG_CMD_SH
        !            45: extern int sh_main(int argc, char *argv[]);
        !            46: #endif
        !            47:
        !            48: int
        !            49: help_main(int argc, char *argv[])
        !            50: {
        !            51:        struct cmd_entry const *entry;
        !            52:        struct winsize ws;
        !            53:        int maxcol, col = 0;
        !            54:
        !            55:        /* Get screen size */
        !            56:        maxcol = 80;
        !            57:        if (ioctl(fileno(stderr), TIOCGWINSZ, (u_long)&ws) == 0)
        !            58:                maxcol = (int)ws.ws_col;
        !            59:        if (maxcol < 80)
        !            60:                maxcol -= 15;
        !            61:        else
        !            62:                maxcol -= 25;
        !            63:
        !            64:        fprintf(stderr, "usage: cmdbox [command] [arguments]...\n");
        !            65:        fprintf(stderr, "builtin commands:\n");
        !            66:        entry = builtin_cmds;
        !            67:        while (entry->cmd != NULL) {
        !            68:                col += fprintf(stderr, "%s%s", ((col == 0) ? "    " : ", "),
        !            69:                               entry->cmd);
        !            70:                entry++;
        !            71:                if (col > maxcol && entry->cmd != NULL) {
        !            72:                        fprintf(stderr, ",\n");
        !            73:                        col = 0;
        !            74:                }
        !            75:        }
        !            76:        fprintf(stderr, "\nuse `-?` to find out more about each command.\n");
        !            77:        return 0;
        !            78: }
        !            79:
        !            80: static void
        !            81: bannar(void)
        !            82: {
        !            83:        struct info_kernel info;
        !            84:
        !            85:        sys_info(INFO_KERNEL, &info);
        !            86:        printf("%s version %s (%s)\n",
        !            87:               info.sysname, info.version, info.machine);
        !            88: }
        !            89:
        !            90: int
        !            91: main(int argc, char *argv[])
        !            92: {
        !            93:        static char *shcmd[] = {"sh"};
        !            94:        char *prog, *cmd;
        !            95:        struct cmd_entry const *entry;
        !            96:
        !            97:        prog = basename(argv[0]);
        !            98:        if (!strcmp(prog, "cmdbox")) {
        !            99:                if (argc == 1) {
        !           100:                        bannar();
        !           101: #ifdef CONFIG_CMD_SH
        !           102:                        exit(sh_main(1, shcmd));
        !           103: #else
        !           104:                        exit(1);
        !           105: #endif
        !           106:                } else {
        !           107:                        cmd = argv[1];
        !           108:                        argv++;
        !           109:                        argc--;
        !           110:                }
        !           111:        } else
        !           112:                cmd = prog;
        !           113:
        !           114:        entry = builtin_cmds;
        !           115:        while (entry->cmd != NULL) {
        !           116:                if (!strcmp(cmd, entry->cmd))
        !           117:                        exit(entry->func(argc, argv));
        !           118:                entry++;
        !           119:        }
        !           120:        return 0;
        !           121: }