FreeCalypso > hg > themwi-system-sw

annotate sip-in/readconf.c @ 47:62f39c7cee15

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themwi-sip-in skeleton started
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 06 Sep 2022 20:33:56 -0800
parents
children 709b78a4ebf0
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47
62f39c7cee15 themwi-sip-in skeleton started
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * In this module we implement the reading of /var/gsm/themwi-sip-in.cfg:
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Mychaela Falconia <falcon@freecalypso.org>
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3 * the main settings are bind-ip and bind-port, but we also have some
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4 * optional config settings.
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5 */
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6
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7 #include <sys/types.h>
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8 #include <sys/socket.h>
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9 #include <netinet/in.h>
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10 #include <arpa/inet.h>
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11 #include <ctype.h>
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12 #include <stdio.h>
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13 #include <stdlib.h>
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14 #include <string.h>
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15 #include <strings.h>
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16
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17 struct in_addr sip_bind_ip;
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18 unsigned sip_bind_port;
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19 int cfg_use_100rel;
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20
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21 static char config_file_pathname[] = "/var/gsm/themwi-sip-in.cfg";
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22
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23 struct parse_state {
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24 int lineno;
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25 int set_mask;
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26 };
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27
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28 static void
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29 handle_ip(st, kw, var, arg)
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30 struct parse_state *st;
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31 char *kw, *arg;
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32 struct in_addr *var;
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33 {
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34 var->s_addr = inet_addr(arg);
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35 if (var->s_addr == INADDR_NONE) {
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36 fprintf(stderr,
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37 "%s line %d: invalid IP address argument \"%s\"\n",
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38 config_file_pathname, st->lineno, arg);
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39 exit(1);
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40 }
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41 }
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42
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43 static void
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44 handle_num(st, kw, var, arg)
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45 struct parse_state *st;
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46 char *kw, *arg;
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47 unsigned *var;
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48 {
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49 char *endp;
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50
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51 *var = strtoul(arg, &endp, 10);
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52 if (*endp) {
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53 fprintf(stderr, "%s line %d: invalid numeric argument \"%s\"\n",
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54 config_file_pathname, st->lineno, arg);
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55 exit(1);
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56 }
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57 }
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58
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59 static void
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60 handle_bool(st, kw, var, arg)
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61 struct parse_state *st;
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62 char *kw, *arg;
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63 int *var;
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64 {
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65 if (!strcmp(arg, "true") || !strcmp(arg, "on") || !strcmp(arg, "yes")
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66 || !strcmp(arg, "1")) {
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67 *var = 1;
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68 return;
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69 }
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70 if (!strcmp(arg, "false") || !strcmp(arg, "off") || !strcmp(arg, "no")
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71 || !strcmp(arg, "0")) {
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72 *var = 0;
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73 return;
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74 }
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75 fprintf(stderr, "%s line %d: invalid boolean argument \"%s\"\n",
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76 config_file_pathname, st->lineno, arg);
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77 exit(1);
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78 }
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79
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80 static void
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81 process_line(st, line)
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82 struct parse_state *st;
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83 char *line;
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84 {
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85 char *cp, *np, *arg;
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86 void (*handler)(), *var;
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87 int set_id;
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88
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89 if (!index(line, '\n')) {
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90 fprintf(stderr, "%s line %d: too long or missing newline\n",
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91 config_file_pathname, st->lineno);
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92 exit(1);
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93 }
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94 for (cp = line; isspace(*cp); cp++)
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95 ;
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96 if (*cp == '\0' || *cp == '#')
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97 return;
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98 for (np = cp; *cp && !isspace(*cp); cp++)
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99 ;
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100 if (*cp)
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101 *cp++ = '\0';
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102 if (!strcmp(np, "bind-ip")) {
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103 handler = handle_ip;
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104 var = &sip_bind_ip;
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105 set_id = 1;
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106 } else if (!strcmp(np, "bind-port")) {
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107 handler = handle_num;
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108 var = &sip_bind_port;
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109 set_id = 2;
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110 } else if (!strcmp(np, "use-100rel")) {
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111 handler = handle_bool;
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112 var = &cfg_use_100rel;
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113 set_id = 0;
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114 } else {
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115 fprintf(stderr, "%s line %d: non-understood keyword \"%s\"\n",
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116 config_file_pathname, st->lineno, np);
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117 exit(1);
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118 }
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119 if (st->set_mask & set_id) {
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120 fprintf(stderr, "%s line %d: duplicate %s setting\n",
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121 config_file_pathname, st->lineno, np);
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122 exit(1);
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123 }
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124 while (isspace(*cp))
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125 cp++;
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126 if (*cp == '\0' || *cp == '#') {
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127 inv_syntax: fprintf(stderr,
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128 "%s line %d: %s setting requires one argument\n",
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129 config_file_pathname, st->lineno, np);
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130 exit(1);
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131 }
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132 for (arg = cp; *cp && !isspace(*cp); cp++)
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133 ;
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134 if (*cp)
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135 *cp++ = '\0';
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136 while (isspace(*cp))
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137 cp++;
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138 if (*cp != '\0' && *cp != '#')
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139 goto inv_syntax;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 handler(st, np, var, arg);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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141 st->set_mask |= set_id;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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142 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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143
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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144 read_config_file()
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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145 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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146 FILE *inf;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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147 struct parse_state pst;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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148 char linebuf[256];
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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149
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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150 inf = fopen(config_file_pathname, "r");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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151 if (!inf) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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152 perror(config_file_pathname);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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153 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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154 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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155 pst.set_mask = 0;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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156 for (pst.lineno = 1; fgets(linebuf, sizeof linebuf, inf); pst.lineno++)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 process_line(&pst, linebuf);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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158 fclose(inf);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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159 if (pst.set_mask != 3) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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160 fprintf(stderr, "error: %s did not set all required settings\n",
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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161 config_file_pathname);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 }