lib/sl/ss.c

   1 /*
   2  * Copyright (c) 1998 - 2000 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "sl_locl.h"
  35 #include <com_err.h>
  36 #include "ss.h"
  37
  38 RCSID("$Id$");
  39
  40 struct ss_subst {
  41     char *name;
  42     char *version;
  43     char *info;
  44     ss_request_table *table;
  45 };
  46
  47 static struct ss_subst subsystems[2];
  48 static int num_subsystems;
  49
  50 int
  51 ss_create_invocation(const char *subsystem,
  52                      const char *version,
  53                      const char *info,
  54                      ss_request_table *table,
  55                      int *code)
  56 {
  57     struct ss_subst *ss;
  58
  59     if(num_subsystems >= sizeof(subsystems) / sizeof(subsystems[0])) {
  60         *code = 17;
  61         return 0;
  62     }
  63     ss = &subsystems[num_subsystems];
  64     ss->name = ss->version = ss->info = NULL;
  65     if (subsystem != NULL) {
  66         ss->name = strdup (subsystem);
  67         if (ss->name == NULL) {
  68             *code = ENOMEM;
  69             return 0;
  70         }
  71     }
  72     if (version != NULL) {
  73         ss->version = strdup (version);
  74         if (ss->version == NULL) {
  75             *code = ENOMEM;
  76             return 0;
  77         }
  78     }
  79     if (info != NULL) {
  80         ss->info = strdup (info);
  81         if (ss->info == NULL) {
  82             *code = ENOMEM;
  83             return 0;
  84         }
  85     }
  86     ss->table = table;
  87     *code = 0;
  88     return num_subsystems++;
  89 }
  90
  91 void
  92 ss_error (int idx, long code, const char *fmt, ...)
  93 {
  94     va_list ap;
  95     va_start(ap, fmt);
  96     com_err_va (subsystems[idx].name, code, fmt, ap);
  97     va_end(ap);
  98 }
  99
 100 void
 101 ss_perror (int idx, long code, const char *msg)
 102 {
 103     ss_error(idx, code, "%s", msg);
 104 }
 105
 106 int
 107 ss_execute_command(int idx, char **argv)
 108 {
 109     int argc = 0;
 110     int ret;
 111
 112     while(argv[argc++]);
 113     ret = sl_command(subsystems[idx].table, argc, argv);
 114     if (ret == SL_BADCOMMAND)
 115         return SS_ET_COMMAND_NOT_FOUND;
 116     return 0;
 117 }
 118
 119 int
 120 ss_execute_line (int idx, const char *line)
 121 {
 122     char *buf = strdup(line);
 123     int argc;
 124     char **argv;
 125     int ret;
 126
 127     if (buf == NULL)
 128         return ENOMEM;
 129     sl_make_argv(buf, &argc, &argv);
 130     ret = sl_command(subsystems[idx].table, argc, argv);
 131     free(buf);
 132     if (ret == SL_BADCOMMAND)
 133         return SS_ET_COMMAND_NOT_FOUND;
 134     return 0;
 135 }
 136
 137 int
 138 ss_listen (int idx)
 139 {
 140     char *prompt = malloc(strlen(subsystems[idx].name) + 3);
 141     if (prompt == NULL)
 142         return ENOMEM;
 143
 144     strcpy(prompt, subsystems[idx].name);
 145     strcat(prompt, ": ");
 146     sl_loop(subsystems[idx].table, prompt);
 147     free(prompt);
 148     return 0;
 149 }
 150
 151 int
 152 ss_list_requests(int argc, char **argv /* , int idx, void *info */)
 153 {
 154     sl_help(subsystems[0 /* idx */].table, argc, argv);
 155     return 0;
 156 }
 157
 158 int
 159 ss_quit(int argc, char **argv)
 160 {
 161     return 1;
 162 }