usr/bin/cmdbox/main.c

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This source file includes following definitions.
null_main
help_main
main
   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 <sys/prex.h>
  31 
  32 #include <limits.h>
  33 #include <ctype.h>
  34 #include <unistd.h>
  35 #include <string.h>
  36 #include <stdlib.h>
  37 #include <stdio.h>
  38 #include <libgen.h>
  39 #include <termios.h>
  40 
  41 #include "cmdbox.h"
  42 
  43 #ifdef CONFIG_CMD_SH
  44 extern int sh_main(int argc, char *argv[]);
  45 #endif
  46 
  47 int
  48 null_main(int argc, char *argv[])
  49 {
  50         return -1;
  51 }
  52 
  53 int
  54 help_main(int argc, char *argv[])
  55 {
  56         struct cmdentry const *entry;
  57         struct winsize ws;
  58         int maxcol, col = 0;
  59 
  60         /* Get screen size */
  61         maxcol = 80;
  62         if (ioctl(fileno(stderr), TIOCGWINSZ, &ws) == 0)
  63                 maxcol = (int)ws.ws_col;
  64         if (maxcol < 80)
  65                 maxcol -= 15;
  66         else
  67                 maxcol -= 25;
  68 
  69         fprintf(stderr, "usage: cmdbox [command] [arguments]...\n");
  70         fprintf(stderr, "builtin commands:\n");
  71 
  72         /*
  73          * Show help for builtin commands.
  74          */
  75         entry = builtin_cmds;
  76         while (entry->cmd != NULL) {
  77                 col += fprintf(stderr, "%s%s", ((col == 0) ? "    " : ", "),
  78                                entry->cmd);
  79                 entry++;
  80                 if (col > maxcol && entry->cmd != NULL) {
  81                         fprintf(stderr, ",\n");
  82                         col = 0;
  83                 }
  84         }
  85 
  86 #ifdef CONFIG_CMD_SH
  87         /*
  88          * Show help for shell commands.
  89          */
  90         entry = shell_cmds;
  91         while (entry->cmd != NULL) {
  92                 col += fprintf(stderr, "%s%s", ((col == 0) ? "    " : ", "),
  93                                entry->cmd);
  94                 entry++;
  95                 if (col > maxcol && entry->cmd != NULL) {
  96                         fprintf(stderr, ",\n");
  97                         col = 0;
  98                 }
  99         }
 100 #endif
 101         fprintf(stderr, "\nuse `-?` to find out more about each command.\n");
 102         return 0;
 103 }
 104 
 105 int
 106 main(int argc, char *argv[])
 107 {
 108         char *prog, *cmd;
 109         struct cmdentry const *entry;
 110         int shcmd = 0;
 111 
 112         prog = basename(argv[0]);
 113         cmd = prog;
 114 
 115         /*
 116          * Alias:
 117          * 'sh'            => sh
 118          * 'cmdbox'        => sh
 119          * 'cmdbox sh'     => sh
 120          * 'cmdbox cmd'    => cmd
 121          * 'cmd' (symlink) => cmd
 122          */
 123         if (!strcmp(prog, "sh"))
 124                 shcmd = 1;
 125         else if (!strcmp(prog, "cmdbox")) {
 126                 if (argc == 1)
 127                         shcmd = 1;
 128                 else {
 129                         if (!strcmp(argv[1], "sh"))
 130                                 shcmd = 1;
 131                         else
 132                                 cmd = argv[1];
 133                         argv++;
 134                         argc--;
 135                 }
 136         }
 137 
 138         if (shcmd) {
 139                 task_setname(task_self(), "sh");
 140                 exit(sh_main(argc, argv));
 141         }
 142 
 143         entry = builtin_cmds;
 144         while (entry->cmd != NULL) {
 145                 if (!strcmp(cmd, entry->cmd)) {
 146                         task_setname(task_self(), cmd);
 147                         exit(entry->func(argc, argv));
 148                 }
 149                 entry++;
 150         }
 151         fprintf(stderr, "No such command: %s\n", cmd);
 152         return 0;
 153 }
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root/usr/bin/cmdbox/main.c

DEFINITIONS
