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annotate pwmrc.c @ 32:b5ebed168e59

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Only invoke pager in the help command for the summary of all commands Display usage information for a single command directly and prefix it with "usage:" like usage error messages.
author Guido Berhoerster <guido+pwm@berhoerster.name>
date Tue, 28 Nov 2017 17:16:24 +0100
parents 2552eec9b913
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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29
00d782cb45fa Read configuration file on startup
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1 /*
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2 * Copyright (C) 2017 Guido Berhoerster <guido+pwm@berhoerster.name>
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3 *
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4 * Permission is hereby granted, free of charge, to any person obtaining
00d782cb45fa Read configuration file on startup
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5 * a copy of this software and associated documentation files (the
00d782cb45fa Read configuration file on startup
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6 * "Software"), to deal in the Software without restriction, including
00d782cb45fa Read configuration file on startup
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7 * without limitation the rights to use, copy, modify, merge, publish,
00d782cb45fa Read configuration file on startup
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8 * distribute, sublicense, and/or sell copies of the Software, and to
00d782cb45fa Read configuration file on startup
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9 * permit persons to whom the Software is furnished to do so, subject to
00d782cb45fa Read configuration file on startup
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10 * the following conditions:
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11 *
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12 * The above copyright notice and this permission notice shall be included
00d782cb45fa Read configuration file on startup
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13 * in all copies or substantial portions of the Software.
00d782cb45fa Read configuration file on startup
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14 *
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00d782cb45fa Read configuration file on startup
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16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00d782cb45fa Read configuration file on startup
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17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
00d782cb45fa Read configuration file on startup
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21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 */
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23
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24 #include "compat.h"
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25
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26 #include <errno.h>
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27 #include <fcntl.h>
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28 #ifdef HAVE_ERR_H
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29 #include <err.h>
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30 #endif /* HAVE_ERR_H */
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31 #include <stdio.h>
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32 #include <stdlib.h>
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33 #include <string.h>
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34 #include <sys/stat.h>
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35 #include <unistd.h>
00d782cb45fa Read configuration file on startup
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36
00d782cb45fa Read configuration file on startup
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37 #include "pwm.h"
00d782cb45fa Read configuration file on startup
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38 #include "cmd.h"
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39 #include "io.h"
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40 #include "macro.h"
00d782cb45fa Read configuration file on startup
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41 #include "tok.h"
00d782cb45fa Read configuration file on startup
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42 #include "util.h"
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43
00d782cb45fa Read configuration file on startup
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44 static const char *config_cmds[] = {
00d782cb45fa Read configuration file on startup
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45 "set",
00d782cb45fa Read configuration file on startup
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46 "define"
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47 };
00d782cb45fa Read configuration file on startup
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48
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49 int
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50 pwmrc_read(struct pwm_ctx *ctx)
00d782cb45fa Read configuration file on startup
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51 {
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52 int retval = -1;
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53 char *filename = NULL;
00d782cb45fa Read configuration file on startup
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54 FILE *fp = NULL;
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55 int lineno;
00d782cb45fa Read configuration file on startup
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56 char buf[PWM_LINE_MAX] = { '\0' };
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57 size_t tokenc = 0;
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58 union tok **tokenv = NULL;
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59 int argc = 0;
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60 char **argv = NULL;
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61 struct cmd *cmd;
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62 size_t i;
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63 int is_config_cmd;
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64 int j;
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65
00d782cb45fa Read configuration file on startup
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66 xasprintf(&filename, "%s/pwmrc", ctx->dirname);
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67
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68 fp = fopen(filename, "r");
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69 if (fp == NULL) {
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70 if (errno == ENOENT) {
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71 retval = 0;
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72 } else {
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73 warn("failed to open configuration file \"%s\"",
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74 filename);
00d782cb45fa Read configuration file on startup
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75 }
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
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76 goto out;
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
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77 }
00d782cb45fa Read configuration file on startup
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78
00d782cb45fa Read configuration file on startup
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79 for (lineno = 1;; lineno++) {
00d782cb45fa Read configuration file on startup
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80 /* read next line */
00d782cb45fa Read configuration file on startup
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81 is_config_cmd = 0;
00d782cb45fa Read configuration file on startup
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82 if (fgets(buf, sizeof (buf), fp) == NULL) {
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83 if (feof(fp)) {
00d782cb45fa Read configuration file on startup
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84 goto done;
00d782cb45fa Read configuration file on startup
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85 }
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86 warn("failed to read from configuration file \"%s\"",
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87 filename);
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88 goto out;
00d782cb45fa Read configuration file on startup
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89 }
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90 if (strchr(buf, '\n') == NULL) {
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91 fprintf(stderr, "line %d too long\n", lineno);
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92 goto out;
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93 }
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94
00d782cb45fa Read configuration file on startup
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95 /* tokenize line */
00d782cb45fa Read configuration file on startup
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96 switch (tok_tokenize(buf, &tokenc, &tokenv)) {
00d782cb45fa Read configuration file on startup
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97 case TOK_ERR_UNTERMINATED_QUOTE:
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98 fprintf(stderr, "unterminated quote in line %d\n",
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99 lineno);
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100 if (!ctx->is_interactive) {
00d782cb45fa Read configuration file on startup
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101 goto out;
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102 }
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103 goto next;
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104 case TOK_ERR_TRAILING_BACKSLASH:
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105 fprintf(stderr, "trailing backslash in line %d\n",
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106 lineno);
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107 if (!ctx->is_interactive) {
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108 goto out;
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109 }
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110 goto next;
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111 case TOK_ERR_INVALID_MACRO_NAME:
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112 fprintf(stderr, "invalid macro name in line %d\n",
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113 lineno);
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114 if (!ctx->is_interactive) {
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115 goto out;
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116 }
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117 goto next;
30
2552eec9b913 Explicitly handle all cases in switch statements
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118 case TOK_ERR_OK:
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119 break;
29
00d782cb45fa Read configuration file on startup
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120 }
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121
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122 /* expand macros */
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123 if (macro_expand_macros(ctx->macro_head, tokenc, tokenv, &argc,
00d782cb45fa Read configuration file on startup
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124 &argv) != 0) {
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125 fprintf(stderr, "undefined macro in line %d\n", lineno);
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126 if (!ctx->is_interactive) {
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127 goto out;
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128 }
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129 goto next;
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130 }
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131
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132 if (argc == 0) {
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133 /* empty line */
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134 goto next;
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135 }
00d782cb45fa Read configuration file on startup
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136
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137 /* find and execute the command */
00d782cb45fa Read configuration file on startup
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138 cmd = cmd_match(argv[0]);
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139 for (i = 0; (cmd != NULL) && (i < COUNTOF(config_cmds)); i++) {
00d782cb45fa Read configuration file on startup
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140 if (strcmp(cmd->full_cmd, config_cmds[i]) == 0) {
00d782cb45fa Read configuration file on startup
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141 is_config_cmd = 1;
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
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142 break;
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
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143 }
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
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144 }
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
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145 if (!is_config_cmd) {
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
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146 fprintf(stderr, "unknown configuration command \"%s\""
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
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147 " in line %d\n", argv[0], lineno);
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
148 goto out;
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
149 }
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
150 if (cmd->cmd_func(ctx, argc, argv) != CMD_OK) {
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
151 fprintf(stderr, "syntax error in line %d\n", lineno);
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
152 goto out;
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
153 }
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
154
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
155 next:
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
156 for (j = 0; j < argc; j++) {
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
157 free(argv[j]);
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
158 }
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
159 free(argv);
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
160 argc = 0;
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
161 argv = NULL;
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
162 tok_free(tokenv);
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
163 tokenc = 0;
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
164 tokenv = NULL;
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
165 }
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
166
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
167 done:
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
168 retval = 0;
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
169
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
170 out:
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
171 for (j = 0; j < argc; j++) {
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
172 free(argv[j]);
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
173 }
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
174 free(argv);
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
175 tok_free(tokenv);
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
176 if (fp != NULL) {
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
177 fclose(fp);
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
178 }
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
179 free(filename);
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
180
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
181 return (retval);
00d782cb45fa Read configuration file on startup
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
182 }