121 lines
3.0 KiB
C
121 lines
3.0 KiB
C
/*
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skipfish - Config parsing
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----------------------------------------
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Author: Niels Heinen <heinenn@google.com>,
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Copyright 2012 by Google Inc. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include <ctype.h>
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#define _VIA_OPTIONS_C
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#include "options.h"
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#include "types.h"
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#include "debug.h"
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#include "alloc-inl.h"
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#include "string-inl.h"
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u8 **fargv;
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u32 fargc = 0;
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/* This function reads the configuration file turns them into
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flags that are given to getopt_long. */
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int read_config_file(const char *filename, int *_argc, char ***_argv) {
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FILE *fh;
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char line[MAX_LINE_LEN + 1];
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char *val, *ptr;
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u8 *tmp;
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u32 idx, i;
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APPEND_STRING(fargv, fargc, ck_strdup((u8*)*_argv[0]));
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fh = fopen(filename, "r");
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if (!fh) PFATAL("Unable to read config from: %s", filename);
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while (!feof(fh) && fargc < MAX_ARGS && fgets(line, MAX_LINE_LEN, fh)) {
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/* Skip comments and empty lines */
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if (line[0] == '\n' || line[0] == '\r' || line[0] == '#')
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continue;
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/* NULL terminate the key */
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idx = strcspn(line, " \t=");
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if (idx == strlen(line))
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FATAL("Config key error at line: %s", line);
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line[idx] = '\0';
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/* Find the beginning of the value. */
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val = line + (idx + 1);
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idx = strspn(val, " \t=");
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if (idx == strlen(val))
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FATAL("Config value error at line: %s", line);
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val = val + idx;
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/* Trim the unwanted characters from the value */
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ptr = val + (strlen(val) - 1);
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while(*ptr && *ptr < 0x21) {
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*ptr = 0;
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ptr--;
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}
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/* Done! Now we have a key/value pair. If the flag is set to 'false'
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we will disregard this line. If the value is 'true', we will set
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the flag without a value. In any other case, we will set the flag
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and value */
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if (val[0] == '\0')
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FATAL("Empty value in config line: %s", line);
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if (strcasecmp("false", val) == 0)
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continue;
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tmp = ck_alloc(strlen(line) + 3);
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sprintf((char*)tmp, "--%s", line);
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APPEND_STRING(fargv, fargc, tmp);
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if (strncasecmp("true", val, 3) != 0)
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APPEND_STRING(fargv, fargc, ck_strdup((u8*)val));
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}
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/* Copy arguments from command line into our array */
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for (i=1; i<*_argc && fargc < MAX_ARGS; ++i)
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APPEND_STRING(fargv, fargc, ck_strdup((u8*)(*_argv)[i]));
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/* Replace original flags */
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*_argc = fargc;
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*_argv = (char **)fargv;
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fclose(fh);
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return 0;
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}
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/* Helper function to cleanup memory */
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void destroy_config() {
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if (fargc == 0) return;
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while (fargc-- != 0)
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ck_free(fargv[fargc]);
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ck_free(fargv);
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}
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