FreeCalypso > hg > themwi-system-sw
annotate sip-in/readconf.c @ 99:738be11ac432
mgw internal code: simplify MDCX error handling
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 26 Sep 2022 13:42:46 -0800 |
parents | a9137bdb6047 |
children | ce3b1db7d1d7 |
rev | line source |
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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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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 unsigned cfg_retrans_timeout = 500; |
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21 unsigned cfg_retrans_count = 10; |
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22 unsigned max_forwards = 70; |
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23 |
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24 static char config_file_pathname[] = "/var/gsm/themwi-sip-in.cfg"; |
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25 |
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26 struct parse_state { |
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27 int lineno; |
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28 int set_mask; |
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29 }; |
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30 |
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31 static void |
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32 require_one_arg(st, kw, arg) |
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33 struct parse_state *st; |
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34 char *kw, *arg; |
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35 { |
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36 char *cp; |
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37 |
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38 if (*arg == '\0' || *arg == '#') { |
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39 inv_syntax: fprintf(stderr, |
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40 "%s line %d: %s setting requires one argument\n", |
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41 config_file_pathname, st->lineno, kw); |
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42 exit(1); |
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43 } |
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44 for (cp = arg; *cp && !isspace(*cp); cp++) |
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45 ; |
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46 if (*cp) |
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47 *cp++ = '\0'; |
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48 while (isspace(*cp)) |
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49 cp++; |
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50 if (*cp != '\0' && *cp != '#') |
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51 goto inv_syntax; |
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52 } |
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53 |
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54 static void |
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55 handle_ip(st, kw, arg, var) |
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56 struct parse_state *st; |
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57 char *kw, *arg; |
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58 struct in_addr *var; |
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59 { |
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60 require_one_arg(st, kw, arg); |
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61 var->s_addr = inet_addr(arg); |
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62 if (var->s_addr == INADDR_NONE) { |
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63 fprintf(stderr, |
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64 "%s line %d: invalid IP address argument \"%s\"\n", |
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65 config_file_pathname, st->lineno, arg); |
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66 exit(1); |
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67 } |
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68 } |
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69 |
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70 static void |
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71 handle_num(st, kw, arg, var) |
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72 struct parse_state *st; |
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73 char *kw, *arg; |
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74 unsigned *var; |
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75 { |
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76 char *endp; |
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77 |
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78 require_one_arg(st, kw, arg); |
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79 *var = strtoul(arg, &endp, 10); |
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80 if (*endp) { |
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81 fprintf(stderr, "%s line %d: invalid numeric argument \"%s\"\n", |
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82 config_file_pathname, st->lineno, arg); |
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83 exit(1); |
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84 } |
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85 } |
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86 |
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87 static void |
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88 handle_bool(st, kw, arg, var) |
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89 struct parse_state *st; |
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90 char *kw, *arg; |
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91 int *var; |
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92 { |
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93 require_one_arg(st, kw, arg); |
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94 if (!strcmp(arg, "true") || !strcmp(arg, "on") || !strcmp(arg, "yes") |
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95 || !strcmp(arg, "1")) { |
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96 *var = 1; |
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97 return; |
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98 } |
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99 if (!strcmp(arg, "false") || !strcmp(arg, "off") || !strcmp(arg, "no") |
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100 || !strcmp(arg, "0")) { |
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101 *var = 0; |
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102 return; |
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103 } |
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104 fprintf(stderr, "%s line %d: invalid boolean argument \"%s\"\n", |
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105 config_file_pathname, st->lineno, arg); |
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106 exit(1); |
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107 } |
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108 |
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109 static void |
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110 handle_retrans_conf(st, kw, arg) |
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111 struct parse_state *st; |
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112 char *kw, *arg; |
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113 { |
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114 char *cp = arg; |
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115 |
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116 if (!isdigit(*cp)) { |
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117 inv: fprintf(stderr, |
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118 "%s line %d: %s setting requires two numeric arguments\n", |
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119 config_file_pathname, st->lineno, kw); |
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120 exit(1); |
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121 } |
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122 cfg_retrans_timeout = strtoul(cp, &cp, 10); |
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123 while (isspace(*cp)) |
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124 cp++; |
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125 if (!isdigit(*cp)) |
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126 goto inv; |
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127 cfg_retrans_count = strtoul(cp, &cp, 10); |
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128 while (isspace(*cp)) |
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129 cp++; |
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130 if (*cp != '\0' && *cp != '#') |
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131 goto inv; |
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132 } |
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133 |
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134 static void |
47
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135 process_line(st, line) |
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136 struct parse_state *st; |
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137 char *line; |
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138 { |
89
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139 char *cp, *kw; |
47
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140 void (*handler)(), *var; |
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141 int set_id; |
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142 |
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143 if (!index(line, '\n')) { |
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144 fprintf(stderr, "%s line %d: too long or missing newline\n", |
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145 config_file_pathname, st->lineno); |
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146 exit(1); |
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147 } |
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148 for (cp = line; isspace(*cp); cp++) |
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149 ; |
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150 if (*cp == '\0' || *cp == '#') |
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151 return; |
89
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152 for (kw = cp; *cp && !isspace(*cp); cp++) |
47
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153 ; |
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154 if (*cp) |
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155 *cp++ = '\0'; |
89
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156 if (!strcmp(kw, "bind-ip")) { |
47
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157 handler = handle_ip; |
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158 var = &sip_bind_ip; |
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159 set_id = 1; |
89
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160 } else if (!strcmp(kw, "bind-port")) { |
47
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161 handler = handle_num; |
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162 var = &sip_bind_port; |
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163 set_id = 2; |
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164 } else if (!strcmp(kw, "use-100rel")) { |
47
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165 handler = handle_bool; |
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166 var = &cfg_use_100rel; |
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167 set_id = 0; |
91
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168 } else if (!strcmp(kw, "sip-udp-retrans")) { |
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|
169 handler = handle_retrans_conf; |
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170 var = (void *) 0; |
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171 set_id = 0; |
92
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|
172 } else if (!strcmp(kw, "max-forwards")) { |
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|
173 handler = &handle_num; |
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|
174 var = &max_forwards; |
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175 set_id = 0; |
47
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176 } else { |
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177 fprintf(stderr, "%s line %d: non-understood keyword \"%s\"\n", |
89
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|
178 config_file_pathname, st->lineno, kw); |
47
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179 exit(1); |
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|
180 } |
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181 if (st->set_mask & set_id) { |
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182 fprintf(stderr, "%s line %d: duplicate %s setting\n", |
89
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|
183 config_file_pathname, st->lineno, kw); |
47
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184 exit(1); |
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|
185 } |
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186 while (isspace(*cp)) |
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187 cp++; |
90
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|
188 handler(st, kw, cp, var); |
47
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189 st->set_mask |= set_id; |
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|
190 } |
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|
191 |
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|
192 read_config_file() |
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193 { |
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|
194 FILE *inf; |
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195 struct parse_state pst; |
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|
196 char linebuf[256]; |
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|
197 |
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198 inf = fopen(config_file_pathname, "r"); |
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199 if (!inf) { |
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|
200 perror(config_file_pathname); |
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201 exit(1); |
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|
202 } |
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|
203 pst.set_mask = 0; |
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204 for (pst.lineno = 1; fgets(linebuf, sizeof linebuf, inf); pst.lineno++) |
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|
205 process_line(&pst, linebuf); |
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|
206 fclose(inf); |
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|
207 if (pst.set_mask != 3) { |
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|
208 fprintf(stderr, "error: %s did not set all required settings\n", |
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|
209 config_file_pathname); |
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|
210 exit(1); |
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|
211 } |
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|
212 } |