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00023 #include "asterisk.h"
00024
00025 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 95470 $")
00026
00027 #include <stdio.h>
00028 #include <stdlib.h>
00029 #include <string.h>
00030 #include <sys/types.h>
00031 #include <sys/stat.h>
00032
00033 #include "asterisk/module.h"
00034 #include "asterisk/channel.h"
00035 #include "asterisk/pbx.h"
00036 #include "asterisk/logger.h"
00037 #include "asterisk/utils.h"
00038 #include "asterisk/app.h"
00039
00040 static int env_read(struct ast_channel *chan, char *cmd, char *data,
00041 char *buf, size_t len)
00042 {
00043 char *ret = NULL;
00044
00045 *buf = '\0';
00046
00047 if (data)
00048 ret = getenv(data);
00049
00050 if (ret)
00051 ast_copy_string(buf, ret, len);
00052
00053 return 0;
00054 }
00055
00056 static int env_write(struct ast_channel *chan, char *cmd, char *data,
00057 const char *value)
00058 {
00059 if (!ast_strlen_zero(data)) {
00060 if (!ast_strlen_zero(value)) {
00061 setenv(data, value, 1);
00062 } else {
00063 unsetenv(data);
00064 }
00065 }
00066
00067 return 0;
00068 }
00069
00070 static int stat_read(struct ast_channel *chan, char *cmd, char *data,
00071 char *buf, size_t len)
00072 {
00073 char *action;
00074 struct stat s;
00075
00076 ast_copy_string(buf, "0", len);
00077
00078 action = strsep(&data, "|");
00079 if (stat(data, &s)) {
00080 return 0;
00081 } else {
00082 switch (*action) {
00083 case 'e':
00084 strcpy(buf, "1");
00085 break;
00086 case 's':
00087 snprintf(buf, len, "%d", (unsigned int) s.st_size);
00088 break;
00089 case 'f':
00090 snprintf(buf, len, "%d", S_ISREG(s.st_mode) ? 1 : 0);
00091 break;
00092 case 'd':
00093 snprintf(buf, len, "%d", S_ISDIR(s.st_mode) ? 1 : 0);
00094 break;
00095 case 'M':
00096 snprintf(buf, len, "%d", (int) s.st_mtime);
00097 break;
00098 case 'A':
00099 snprintf(buf, len, "%d", (int) s.st_mtime);
00100 break;
00101 case 'C':
00102 snprintf(buf, len, "%d", (int) s.st_ctime);
00103 break;
00104 case 'm':
00105 snprintf(buf, len, "%o", (int) s.st_mode);
00106 break;
00107 }
00108 }
00109
00110 return 0;
00111 }
00112
00113 static struct ast_custom_function env_function = {
00114 .name = "ENV",
00115 .synopsis = "Gets or sets the environment variable specified",
00116 .syntax = "ENV(<envname>)",
00117 .read = env_read,
00118 .write = env_write,
00119 };
00120
00121 static struct ast_custom_function stat_function = {
00122 .name = "STAT",
00123 .synopsis = "Does a check on the specified file",
00124 .syntax = "STAT(<flag>,<filename>)",
00125 .read = stat_read,
00126 .desc =
00127 "flag may be one of the following:\n"
00128 " d - Checks if the file is a directory\n"
00129 " e - Checks if the file exists\n"
00130 " f - Checks if the file is a regular file\n"
00131 " m - Returns the file mode (in octal)\n"
00132 " s - Returns the size (in bytes) of the file\n"
00133 " A - Returns the epoch at which the file was last accessed\n"
00134 " C - Returns the epoch at which the inode was last changed\n"
00135 " M - Returns the epoch at which the file was last modified\n",
00136 };
00137
00138 static int unload_module(void)
00139 {
00140 int res = 0;
00141
00142 res |= ast_custom_function_unregister(&env_function);
00143 res |= ast_custom_function_unregister(&stat_function);
00144
00145 return res;
00146 }
00147
00148 static int load_module(void)
00149 {
00150 int res = 0;
00151
00152 res |= ast_custom_function_register(&env_function);
00153 res |= ast_custom_function_register(&stat_function);
00154
00155 return res;
00156 }
00157
00158 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Environment/filesystem dialplan functions");