remove lots of useless checks of the result of ast_strdupa
[asterisk/asterisk.git] / apps / app_image.c
1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 1999 - 2005, Digium, Inc.
5  *
6  * Mark Spencer <markster@digium.com>
7  *
8  * See http://www.asterisk.org for more information about
9  * the Asterisk project. Please do not directly contact
10  * any of the maintainers of this project for assistance;
11  * the project provides a web site, mailing lists and IRC
12  * channels for your use.
13  *
14  * This program is free software, distributed under the terms of
15  * the GNU General Public License Version 2. See the LICENSE file
16  * at the top of the source tree.
17  */
18
19 /*! \file
20  *
21  * \brief App to transmit an image
22  *
23  * \author Mark Spencer <markster@digium.com>
24  * 
25  * \ingroup applications
26  */
27  
28 #include <stdlib.h>
29 #include <stdio.h>
30 #include <string.h>
31
32 #include "asterisk.h"
33
34 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
35
36 #include "asterisk/lock.h"
37 #include "asterisk/file.h"
38 #include "asterisk/logger.h"
39 #include "asterisk/channel.h"
40 #include "asterisk/pbx.h"
41 #include "asterisk/module.h"
42 #include "asterisk/translate.h"
43 #include "asterisk/image.h"
44 #include "asterisk/app.h"
45 #include "asterisk/options.h"
46
47 static char *tdesc = "Image Transmission Application";
48
49 static char *app = "SendImage";
50
51 static char *synopsis = "Send an image file";
52
53 static char *descrip = 
54 "  SendImage(filename): Sends an image on a channel. \n"
55 "If the channel supports image transport but the image send\n"
56 "fails, the channel will be hung up. Otherwise, the dialplan\n"
57 "continues execution.\n"
58 "The option string may contain the following character:\n"
59 "       'j' -- jump to priority n+101 if the channel doesn't support image transport\n"
60 "This application sets the following channel variable upon completion:\n"
61 "       SENDIMAGESTATUS         The status is the result of the attempt as a text string, one of\n"
62 "               OK | NOSUPPORT \n";                     
63
64 STANDARD_LOCAL_USER;
65
66 LOCAL_USER_DECL;
67
68 static int sendimage_exec(struct ast_channel *chan, void *data)
69 {
70         int res = 0;
71         struct localuser *u;
72         char *parse;
73         int priority_jump = 0;
74         AST_DECLARE_APP_ARGS(args,
75                 AST_APP_ARG(filename);
76                 AST_APP_ARG(options);
77         );
78         
79         LOCAL_USER_ADD(u);
80
81         parse = ast_strdupa(data);
82
83         AST_STANDARD_APP_ARGS(args, parse);
84
85         if (ast_strlen_zero(args.filename)) {
86                 ast_log(LOG_WARNING, "SendImage requires an argument (filename[|options])\n");
87                 return -1;
88         }
89
90         if (args.options) {
91                 if (strchr(args.options, 'j'))
92                         priority_jump = 1;
93         }
94
95         if (!ast_supports_images(chan)) {
96                 /* Does not support transport */
97                 if (priority_jump || ast_opt_priority_jumping)
98                         ast_goto_if_exists(chan, chan->context, chan->exten, chan->priority + 101);
99                 pbx_builtin_setvar_helper(chan, "SENDIMAGESTATUS", "NOSUPPORT");
100                 LOCAL_USER_REMOVE(u);
101                 return 0;
102         }
103
104         res = ast_send_image(chan, args.filename);
105         
106         if (!res)
107                 pbx_builtin_setvar_helper(chan, "SENDIMAGESTATUS", "OK");
108         
109         LOCAL_USER_REMOVE(u);
110         
111         return res;
112 }
113
114 int unload_module(void)
115 {
116         int res;
117
118         res = ast_unregister_application(app);
119
120         STANDARD_HANGUP_LOCALUSERS;
121
122         return res; 
123 }
124
125 int load_module(void)
126 {
127         return ast_register_application(app, sendimage_exec, synopsis, descrip);
128 }
129
130 char *description(void)
131 {
132         return tdesc;
133 }
134
135 int usecount(void)
136 {
137         int res;
138         STANDARD_USECOUNT(res);
139         return res;
140 }
141
142 char *key()
143 {
144         return ASTERISK_GPL_KEY;
145 }