[352] | 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 | #include "tool_setup.h"
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| 23 |
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| 24 | #define ENABLE_CURLX_PRINTF
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| 25 | /* use our own printf() functions */
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| 26 | #include "curlx.h"
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| 27 |
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| 28 | #include "tool_cfgable.h"
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| 29 | #include "tool_getparam.h"
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| 30 | #include "tool_helpers.h"
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| 31 | #include "tool_homedir.h"
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| 32 | #include "tool_msgs.h"
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| 33 | #include "tool_parsecfg.h"
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| 34 |
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| 35 | #include "memdebug.h" /* keep this as LAST include */
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| 36 |
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| 37 | #define CURLRC DOT_CHAR "curlrc"
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| 38 |
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| 39 | /* only acknowledge colon or equals as separators if the option was not
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| 40 | specified with an initial dash! */
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| 41 | #define ISSEP(x,dash) (!dash && (((x) == '=') || ((x) == ':')))
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| 42 |
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| 43 | static const char *unslashquote(const char *line, char *param);
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| 44 | static char *my_get_line(FILE *fp);
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| 45 |
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| 46 | /* return 0 on everything-is-fine, and non-zero otherwise */
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| 47 | int parseconfig(const char *filename, struct GlobalConfig *global)
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| 48 | {
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| 49 | int res;
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| 50 | FILE *file;
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| 51 | char filebuffer[512];
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| 52 | bool usedarg = FALSE;
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| 53 | char *home;
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| 54 | int rc = 0;
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| 55 | struct OperationConfig *operation = global->first;
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| 56 |
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| 57 | if(!filename || !*filename) {
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| 58 | /* NULL or no file name attempts to load .curlrc from the homedir! */
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| 59 |
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| 60 | #ifndef __AMIGA__
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| 61 | filename = CURLRC; /* sensible default */
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| 62 | home = homedir(); /* portable homedir finder */
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| 63 | if(home) {
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| 64 | if(strlen(home) < (sizeof(filebuffer) - strlen(CURLRC))) {
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| 65 | snprintf(filebuffer, sizeof(filebuffer),
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| 66 | "%s%s%s", home, DIR_CHAR, CURLRC);
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| 67 |
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| 68 | #ifdef WIN32
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| 69 | /* Check if the file exists - if not, try CURLRC in the same
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| 70 | * directory as our executable
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| 71 | */
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| 72 | file = fopen(filebuffer, FOPEN_READTEXT);
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| 73 | if(file != NULL) {
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| 74 | fclose(file);
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| 75 | filename = filebuffer;
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| 76 | }
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| 77 | else {
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| 78 | /* Get the filename of our executable. GetModuleFileName is
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| 79 | * already declared via inclusions done in setup header file.
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| 80 | * We assume that we are using the ASCII version here.
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| 81 | */
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| 82 | int n = GetModuleFileNameA(0, filebuffer, sizeof(filebuffer));
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| 83 | if(n > 0 && n < (int)sizeof(filebuffer)) {
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| 84 | /* We got a valid filename - get the directory part */
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| 85 | char *lastdirchar = strrchr(filebuffer, '\\');
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| 86 | if(lastdirchar) {
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| 87 | size_t remaining;
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| 88 | *lastdirchar = 0;
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| 89 | /* If we have enough space, build the RC filename */
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| 90 | remaining = sizeof(filebuffer) - strlen(filebuffer);
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| 91 | if(strlen(CURLRC) < remaining - 1) {
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| 92 | snprintf(lastdirchar, remaining,
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| 93 | "%s%s", DIR_CHAR, CURLRC);
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| 94 | /* Don't bother checking if it exists - we do
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| 95 | * that later
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| 96 | */
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| 97 | filename = filebuffer;
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| 98 | }
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| 99 | }
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| 100 | }
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| 101 | }
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| 102 | #else /* WIN32 */
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| 103 | filename = filebuffer;
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| 104 | #endif /* WIN32 */
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| 105 | }
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| 106 | Curl_safefree(home); /* we've used it, now free it */
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| 107 | }
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| 108 |
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| 109 | # else /* __AMIGA__ */
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| 110 | /* On AmigaOS all the config files are into env:
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| 111 | */
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| 112 | filename = "ENV:" CURLRC;
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| 113 |
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| 114 | #endif
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| 115 | }
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| 116 |
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| 117 | if(strcmp(filename, "-"))
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| 118 | file = fopen(filename, FOPEN_READTEXT);
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| 119 | else
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| 120 | file = stdin;
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| 121 |
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| 122 | if(file) {
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| 123 | char *line;
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| 124 | char *aline;
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| 125 | char *option;
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| 126 | char *param;
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| 127 | int lineno = 0;
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| 128 | bool alloced_param;
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| 129 | bool dashed_option;
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| 130 |
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| 131 | while(NULL != (aline = my_get_line(file))) {
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| 132 | lineno++;
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| 133 | line = aline;
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| 134 | alloced_param = FALSE;
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| 135 |
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| 136 | /* line with # in the first non-blank column is a comment! */
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| 137 | while(*line && ISSPACE(*line))
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| 138 | line++;
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| 139 |
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| 140 | switch(*line) {
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| 141 | case '#':
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| 142 | case '/':
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| 143 | case '\r':
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| 144 | case '\n':
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| 145 | case '*':
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| 146 | case '\0':
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| 147 | Curl_safefree(aline);
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| 148 | continue;
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| 149 | }
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| 150 |
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| 151 | /* the option keywords starts here */
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| 152 | option = line;
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| 153 |
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| 154 | /* the option starts with a dash? */
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| 155 | dashed_option = option[0]=='-'?TRUE:FALSE;
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| 156 |
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| 157 | while(*line && !ISSPACE(*line) && !ISSEP(*line, dashed_option))
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| 158 | line++;
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| 159 | /* ... and has ended here */
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| 160 |
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| 161 | if(*line)
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| 162 | *line++ = '\0'; /* zero terminate, we have a local copy of the data */
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| 163 |
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| 164 | #ifdef DEBUG_CONFIG
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| 165 | fprintf(stderr, "GOT: %s\n", option);
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| 166 | #endif
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| 167 |
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| 168 | /* pass spaces and separator(s) */
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| 169 | while(*line && (ISSPACE(*line) || ISSEP(*line, dashed_option)))
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| 170 | line++;
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| 171 |
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| 172 | /* the parameter starts here (unless quoted) */
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| 173 | if(*line == '\"') {
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| 174 | /* quoted parameter, do the quote dance */
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| 175 | line++;
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| 176 | param = malloc(strlen(line) + 1); /* parameter */
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| 177 | if(!param) {
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| 178 | /* out of memory */
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| 179 | Curl_safefree(aline);
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| 180 | rc = 1;
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| 181 | break;
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| 182 | }
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| 183 | alloced_param = TRUE;
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| 184 | (void)unslashquote(line, param);
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| 185 | }
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| 186 | else {
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| 187 | param = line; /* parameter starts here */
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| 188 | while(*line && !ISSPACE(*line))
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| 189 | line++;
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| 190 |
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| 191 | if(*line) {
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| 192 | *line = '\0'; /* zero terminate */
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| 193 |
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| 194 | /* to detect mistakes better, see if there's data following */
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| 195 | line++;
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| 196 | /* pass all spaces */
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| 197 | while(*line && ISSPACE(*line))
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| 198 | line++;
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| 199 |
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| 200 | switch(*line) {
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| 201 | case '\0':
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| 202 | case '\r':
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| 203 | case '\n':
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| 204 | case '#': /* comment */
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| 205 | break;
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| 206 | default:
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| 207 | warnf(operation->global, "%s:%d: warning: '%s' uses unquoted "
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| 208 | "white space in the line that may cause side-effects!\n",
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| 209 | filename, lineno, option);
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| 210 | }
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| 211 | }
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| 212 | if(!*param)
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| 213 | /* do this so getparameter can check for required parameters.
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| 214 | Otherwise it always thinks there's a parameter. */
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| 215 | param = NULL;
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| 216 | }
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| 217 |
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| 218 | #ifdef DEBUG_CONFIG
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| 219 | fprintf(stderr, "PARAM: \"%s\"\n",(param ? param : "(null)"));
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| 220 | #endif
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| 221 | res = getparameter(option, param, &usedarg, global, operation);
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| 222 |
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| 223 | if(!res && param && *param && !usedarg)
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| 224 | /* we passed in a parameter that wasn't used! */
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| 225 | res = PARAM_GOT_EXTRA_PARAMETER;
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| 226 |
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| 227 | if(res == PARAM_NEXT_OPERATION) {
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| 228 | if(operation->url_list && operation->url_list->url) {
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| 229 | /* Allocate the next config */
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| 230 | operation->next = malloc(sizeof(struct OperationConfig));
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| 231 | if(operation->next) {
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| 232 | /* Initialise the newly created config */
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| 233 | config_init(operation->next);
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| 234 |
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| 235 | /* Copy the easy handle */
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| 236 | operation->next->easy = global->easy;
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| 237 |
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| 238 | /* Set the global config pointer */
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| 239 | operation->next->global = global;
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| 240 |
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| 241 | /* Update the last operation pointer */
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| 242 | global->last = operation->next;
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| 243 |
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| 244 | /* Move onto the new config */
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| 245 | operation->next->prev = operation;
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| 246 | operation = operation->next;
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| 247 | }
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| 248 | else
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| 249 | res = PARAM_NO_MEM;
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| 250 | }
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| 251 | }
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| 252 |
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| 253 | if(res != PARAM_OK && res != PARAM_NEXT_OPERATION) {
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| 254 | /* the help request isn't really an error */
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| 255 | if(!strcmp(filename, "-")) {
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| 256 | filename = "<stdin>";
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| 257 | }
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| 258 | if(res != PARAM_HELP_REQUESTED &&
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| 259 | res != PARAM_MANUAL_REQUESTED &&
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| 260 | res != PARAM_VERSION_INFO_REQUESTED &&
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| 261 | res != PARAM_ENGINES_REQUESTED) {
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| 262 | const char *reason = param2text(res);
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| 263 | warnf(operation->global, "%s:%d: warning: '%s' %s\n",
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| 264 | filename, lineno, option, reason);
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| 265 | }
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| 266 | }
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| 267 |
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| 268 | if(alloced_param)
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| 269 | Curl_safefree(param);
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| 270 |
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| 271 | Curl_safefree(aline);
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| 272 | }
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| 273 | if(file != stdin)
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| 274 | fclose(file);
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| 275 | }
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| 276 | else
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| 277 | rc = 1; /* couldn't open the file */
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| 278 |
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| 279 | return rc;
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| 280 | }
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| 281 |
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| 282 | /*
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| 283 | * Copies the string from line to the buffer at param, unquoting
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| 284 | * backslash-quoted characters and NUL-terminating the output string.
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| 285 | * Stops at the first non-backslash-quoted double quote character or the
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| 286 | * end of the input string. param must be at least as long as the input
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| 287 | * string. Returns the pointer after the last handled input character.
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| 288 | */
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| 289 | static const char *unslashquote(const char *line, char *param)
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| 290 | {
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| 291 | while(*line && (*line != '\"')) {
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| 292 | if(*line == '\\') {
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| 293 | char out;
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| 294 | line++;
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| 295 |
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| 296 | /* default is to output the letter after the backslash */
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| 297 | switch(out = *line) {
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| 298 | case '\0':
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| 299 | continue; /* this'll break out of the loop */
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| 300 | case 't':
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| 301 | out = '\t';
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| 302 | break;
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| 303 | case 'n':
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| 304 | out = '\n';
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| 305 | break;
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| 306 | case 'r':
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| 307 | out = '\r';
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| 308 | break;
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| 309 | case 'v':
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| 310 | out = '\v';
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| 311 | break;
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| 312 | }
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| 313 | *param++ = out;
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| 314 | line++;
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| 315 | }
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| 316 | else
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| 317 | *param++ = *line++;
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| 318 | }
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| 319 | *param = '\0'; /* always zero terminate */
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| 320 | return line;
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| 321 | }
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| 322 |
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| 323 | /*
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| 324 | * Reads a line from the given file, ensuring is NUL terminated.
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| 325 | * The pointer must be freed by the caller.
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| 326 | * NULL is returned on an out of memory condition.
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| 327 | */
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| 328 | static char *my_get_line(FILE *fp)
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| 329 | {
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| 330 | char buf[4096];
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| 331 | char *nl = NULL;
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| 332 | char *line = NULL;
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| 333 |
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| 334 | do {
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| 335 | if(NULL == fgets(buf, sizeof(buf), fp))
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| 336 | break;
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| 337 | if(!line) {
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| 338 | line = strdup(buf);
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| 339 | if(!line)
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| 340 | return NULL;
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| 341 | }
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| 342 | else {
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| 343 | char *ptr;
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| 344 | size_t linelen = strlen(line);
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| 345 | ptr = realloc(line, linelen + strlen(buf) + 1);
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| 346 | if(!ptr) {
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| 347 | Curl_safefree(line);
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| 348 | return NULL;
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| 349 | }
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| 350 | line = ptr;
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| 351 | strcpy(&line[linelen], buf);
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| 352 | }
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| 353 | nl = strchr(line, '\n');
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| 354 | } while(!nl);
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| 355 |
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| 356 | if(nl)
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| 357 | *nl = '\0';
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| 358 |
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| 359 | return line;
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| 360 | }
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| 361 |
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