src/client/cmdline/cmd_shell.c

   1 /* $Id$
   2  * client cmdline interface command "shell" for libcaptive
   3  * Copyright (C) 2003 Jan Kratochvil <project-captive@jankratochvil.net>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; exactly version 2 of June 1991 is required
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19
  20 #include "config.h"
  21
  22 #include <glib/gmessages.h>
  23 #include <glib/gerror.h>
  24 #include <popt.h>
  25 #include <stdlib.h>
  26 #include <glib/gstrfuncs.h>
  27 #include <glib/gmem.h>
  28 #include <string.h>
  29
  30 #ifdef HAVE_LIBREADLINE
  31 #include <readline/readline.h>
  32 #ifdef HAVE_READLINE_HISTORY_H
  33 #include <readline/history.h>
  34 #endif /* HAVE_READLINE_HISTORY_H */
  35 #endif /* HAVE_LIBREADLINE */
  36
  37 #include "cmd_shell.h"  /* self */
  38 #include "cmd_quit.h"   /* for cmd_quit() */
  39 #include "main.h"       /* for invoke_cmd() */
  40 #include "cmd_cd.h"
  41
  42
  43 /* Config: */
  44 #define PROMPT_STRING "%s$ "    /* %s == 'cmdline_cwd' */
  45
  46
  47 GQuark cmdline_cmd_shell_error_quark(void)
  48 {
  49 GQuark r=0;
  50
  51         if (!r)
  52                 r=g_quark_from_static_string("cmdline-cmd-shell");
  53
  54         return r;
  55 }
  56
  57
  58 const struct poptOption cmd_shell_table[]={
  59                 CMDLINE_POPT_AUTOHELP
  60                 POPT_TABLEEND
  61                 };
  62
  63
  64 /* Function mostly stolen from the project Partition Surprise.
  65  */
  66 void cmd_shell(const char **cmd_argv,GError **errp)
  67 {
  68 char *line;
  69 #ifndef HAVE_LIBREADLINE
  70 char linebuf[1024],*s;
  71 #endif /* HAVE_LIBREADLINE */
  72 int errint,line_argc;
  73 const char **line_argv=NULL;
  74 gchar *prompt;
  75 const char *cmd_cd_args[]={NULL};
  76
  77         g_return_if_fail(!errp || !*errp);
  78
  79 #ifndef HAVE_LIBREADLINE
  80         puts(_("Line editing not available, please recompile with readline library installed"));
  81 #endif /* HAVE_LIBREADLINE */
  82
  83         cmd_cd(cmd_cd_args,errp);       /* Show current directory. */
  84         if (errp && *errp)
  85                 return;
  86
  87         for (;;) {
  88                 prompt=g_strdup_printf(PROMPT_STRING,cmdline_cwd);
  89 #ifdef HAVE_LIBREADLINE
  90                 line=readline(prompt);
  91 #ifdef HAVE_ADD_HISTORY
  92                 if (line && *line)
  93                         add_history(line);
  94 #endif /* HAVE_ADD_HISTORY */
  95 #else /* HAVE_LIBREADLINE */
  96                 fputs(prompt,stdout); fflush(stdout);
  97                 line=fgets(linebuf,sizeof(linebuf),stdin);
  98 #endif /* HAVE_LIBREADLINE */
  99                 g_free(prompt);
 100                 if (!line) {
 101                         cmd_quit(
 102                                         NULL,   /* cmd_argv */
 103                                         errp);  /* errp */
 104                         g_assert_not_reached();
 105                         }
 106 #ifndef HAVE_LIBREADLINE
 107                 if (line && (s=strchr(line,'\n')))
 108                         *s='\0';
 109 #endif /* HAVE_LIBREADLINE */
 110
 111                 line_argv=NULL;
 112                 errint=poptParseArgvString(line,&line_argc,&line_argv);
 113 #ifdef HAVE_LIBREADLINE
 114                 free(line);
 115 #endif /* HAVE_LIBREADLINE */
 116                 if (errint!=0) {
 117                         free(line_argv);
 118                         g_set_error(errp,CMDLINE_CMD_SHELL_ERROR,CMDLINE_CMD_SHELL_ERROR_LINE_PARSE_ARGUMENTS,
 119                                         _("Error '%s' parsing arguments of text line: %s"),poptStrerror(errint),line);
 120                         err_cleanup(errp);
 121                         continue;
 122                         }
 123
 124                 invoke_cmd(line_argc,line_argv);        /* errors catched inside */
 125                 free(line_argv);
 126                 }
 127 }