io/command.c

   1 /*
   2  * Copyright (c) 2003-2004 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32
  33 #include <xfs/libxfs.h>
  34 #include "command.h"
  35 #include "init.h"
  36 #include "io.h"
  37
  38 cmdinfo_t       *cmdtab;
  39 int             ncmds;
  40
  41 static int
  42 cmd_compare(const void *a, const void *b)
  43 {
  44         return strcmp(((const cmdinfo_t *)a)->name,
  45                       ((const cmdinfo_t *)b)->name);
  46 }
  47
  48 void
  49 add_command(
  50         const cmdinfo_t *ci)
  51 {
  52         cmdtab = realloc((void *)cmdtab, ++ncmds * sizeof(*cmdtab));
  53         cmdtab[ncmds - 1] = *ci;
  54         qsort(cmdtab, ncmds, sizeof(*cmdtab), cmd_compare);
  55 }
  56
  57 int
  58 command_usage(
  59         const cmdinfo_t *ci)
  60 {
  61         printf("%s %s\n", ci->name, ci->oneline);
  62         return 0;
  63 }
  64
  65 int
  66 command(
  67         int             argc,
  68         char            **argv)
  69 {
  70         char            *cmd;
  71         const cmdinfo_t *ct;
  72
  73         cmd = argv[0];
  74         ct = find_command(cmd);
  75         if (!ct) {
  76                 fprintf(stderr, _("command \"%s\" not found\n"), cmd);
  77                 return 0;
  78         }
  79         if (!file && !(ct->flags & CMD_NOFILE_OK)) {
  80                 fprintf(stderr, _("no files are open, try 'help open'\n"));
  81                 return 0;
  82         }
  83         if (!mapping && !(ct->flags & CMD_NOMAP_OK)) {
  84                 fprintf(stderr, _("no mapped regions, try 'help mmap'\n"));
  85                 return 0;
  86         }
  87         if (file && !(ct->flags & CMD_FOREIGN_OK) &&
  88                                         (file->flags & IO_FOREIGN)) {
  89                 fprintf(stderr,
  90         _("foreign file active, %s command is for XFS filesystems only\n"),
  91                         cmd);
  92                 return 0;
  93         }
  94         if (argc-1 < ct->argmin || (ct->argmax != -1 && argc-1 > ct->argmax)) {
  95                 if (ct->argmax == -1)
  96                         fprintf(stderr,
  97         _("bad argument count %d to %s, expected at least %d arguments\n"),
  98                                 argc-1, cmd, ct->argmin);
  99                 else if (ct->argmin == ct->argmax)
 100                         fprintf(stderr,
 101         _("bad argument count %d to %s, expected %d arguments\n"),
 102                                 argc-1, cmd, ct->argmin);
 103                 else
 104                         fprintf(stderr,
 105         _("bad argument count %d to %s, expected between %d and %d arguments\n"),
 106                         argc-1, cmd, ct->argmin, ct->argmax);
 107                 return 0;
 108         }
 109         platform_getoptreset();
 110         return ct->cfunc(argc, argv);
 111 }
 112
 113 const cmdinfo_t *
 114 find_command(
 115         const char      *cmd)
 116 {
 117         cmdinfo_t       *ct;
 118
 119         for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
 120                 if (strcmp(ct->name, cmd) == 0 ||
 121                     (ct->altname && strcmp(ct->altname, cmd) == 0))
 122                         return (const cmdinfo_t *)ct;
 123         }
 124         return NULL;
 125 }
 126
 127 void
 128 init_commands(void)
 129 {
 130         bmap_init();
 131         fadvise_init();
 132         file_init();
 133         freeze_init();
 134         fsync_init();
 135         help_init();
 136         inject_init();
 137         mmap_init();
 138         open_init();
 139         pread_init();
 140         prealloc_init();
 141         pwrite_init();
 142         quit_init();
 143         resblks_init();
 144         sendfile_init();
 145         shutdown_init();
 146         truncate_init();
 147 }