1 /* Read and parse the .netrc file to get hosts, accounts, and passwords.
2 Copyright (C) 1996, 2007, 2008, 2009, 2010, 2011 Free Software
5 This file is part of GNU Wget.
7 GNU Wget is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 GNU Wget is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Wget. If not, see <http://www.gnu.org/licenses/>.
20 Additional permission under GNU GPL version 3 section 7
22 If you modify this program, or any covered work, by linking or
23 combining it with the OpenSSL project's OpenSSL library (or a
24 modified version of that library), containing parts covered by the
25 terms of the OpenSSL or SSLeay licenses, the Free Software Foundation
26 grants you additional permission to convey the resulting work.
27 Corresponding Source for a non-source form of such a combination
28 shall include the source code for the parts of OpenSSL used as well
29 as that of the covered work. */
31 /* This file used to be kept in synch with the code in Fetchmail, but
32 the latter has diverged since. */
45 #define NETRC_FILE_NAME ".netrc"
49 static acc_t *parse_netrc (const char *);
51 /* Return the correct user and password, given the host, user (as
52 given in the URL), and password (as given in the URL). May return
55 If SLACK_DEFAULT is set, allow looking for a "default" account.
56 You will typically turn it off for HTTP. */
58 search_netrc (const char *host, const char **acc, const char **passwd,
62 static int processed_netrc;
73 char *path = "SYS$LOGIN:.netrc";
78 err = stat (path, &buf);
80 netrc_list = parse_netrc (path);
84 char *home = home_dir ();
92 char *path = (char *)alloca (strlen (home) + 1
93 + strlen (NETRC_FILE_NAME) + 1);
94 sprintf (path, "%s/%s", home, NETRC_FILE_NAME);
96 err = stat (path, &buf);
98 netrc_list = parse_netrc (path);
101 #endif /* def __VMS [else] */
103 /* If nothing to do... */
106 /* Acc and password found; all OK. */
109 /* Some data not given -- try finding the host. */
110 for (l = netrc_list; l; l = l->next)
114 else if (!strcasecmp (l->host, host))
121 /* Looking for password in .netrc. */
122 if (!strcmp (l->acc, *acc))
123 *passwd = l->passwd; /* usernames match; password OK */
125 *passwd = NULL; /* usernames don't match */
129 /* If password was given, use it. The account is l->acc. */
142 /* Try looking for the default account. */
143 for (l = netrc_list; l; l = l->next)
160 /* Normally, these functions would be defined by your package. */
161 # define xmalloc malloc
163 # define xstrdup strdup
165 # define xrealloc realloc
167 #endif /* STANDALONE */
169 /* Maybe add NEWENTRY to the account information list, LIST. NEWENTRY is
170 set to a ready-to-use acc_t, in any event. */
172 maybe_add_to_list (acc_t **newentry, acc_t **list)
178 /* We need an account name in order to add the entry to the list. */
181 /* Free any allocated space. */
182 xfree_null (a->host);
184 xfree_null (a->passwd);
190 /* Add the current machine into our list. */
195 /* Allocate a new acc_t structure. */
196 a = xmalloc (sizeof (acc_t));
199 /* Zero the structure, so that it is ready to use. */
200 memset (a, 0, sizeof(*a));
202 /* Return the new pointers. */
208 /* Helper function for the parser, shifts contents of
209 null-terminated string once character to the left.
210 Used in processing \ and " constructs in the netrc file */
212 shift_left(char *string)
216 for (p=string; *p; ++p)
220 /* Parse a .netrc file (as described in the ftp(1) manual page). */
222 parse_netrc (const char *path)
225 char *line = NULL, *p, *tok;
226 const char *premature_token;
227 acc_t *current, *retval;
231 /* The latest token we've seen in the file. */
234 tok_nothing, tok_account, tok_login, tok_macdef, tok_machine, tok_password
235 } last_token = tok_nothing;
237 current = retval = NULL;
239 fp = fopen (path, "r");
242 fprintf (stderr, _("%s: Cannot read %s (%s).\n"), exec_name,
243 path, strerror (errno));
247 /* Initialize the file data. */
249 premature_token = NULL;
251 /* While there are lines in the file... */
252 while (getline (&line, &bufsize, fp) > 0)
256 /* Parse the line. */
260 /* Skip leading whitespace. */
261 while (*p && c_isspace (*p))
264 /* If the line is empty, then end any macro definition. */
265 if (last_token == tok_macdef && !*p)
266 /* End of macro if the line is empty. */
267 last_token = tok_nothing;
269 /* If we are defining macros, then skip parsing the line. */
270 while (*p && last_token != tok_macdef)
272 /* Skip any whitespace. */
273 while (*p && c_isspace (*p))
276 /* Discard end-of-line comments; also, stop processing if
277 the above `while' merely skipped trailing whitespace. */
278 if (*p == '#' || !*p)
281 /* If the token starts with quotation mark, note this fact,
282 and squash the quotation character */
290 /* Find the end of the token, handling quotes and escapes. */
291 while (*p && (qmark ? *p != '"' : !c_isspace (*p))){
297 /* If field was quoted, squash the trailing quotation mark
298 and reset qmark flag. */
305 /* Null-terminate the token, if it isn't already. */
313 current->acc = xstrdup (tok);
315 premature_token = "login";
319 /* Start a new machine entry. */
320 maybe_add_to_list (¤t, &retval);
321 current->host = xstrdup (tok);
326 current->passwd = xstrdup (tok);
328 premature_token = "password";
331 /* We handle most of tok_macdef above. */
334 premature_token = "macdef";
337 /* We don't handle the account keyword at all. */
340 premature_token = "account";
343 /* We handle tok_nothing below this switch. */
350 fprintf (stderr, _("\
351 %s: %s:%d: warning: %s token appears before any machine name\n"),
352 exec_name, path, ln, quote (premature_token));
353 premature_token = NULL;
356 if (last_token != tok_nothing)
357 /* We got a value, so reset the token state. */
358 last_token = tok_nothing;
361 /* Fetch the next token. */
362 if (!strcmp (tok, "account"))
363 last_token = tok_account;
364 else if (!strcmp (tok, "default"))
366 maybe_add_to_list (¤t, &retval);
368 else if (!strcmp (tok, "login"))
369 last_token = tok_login;
371 else if (!strcmp (tok, "macdef"))
372 last_token = tok_macdef;
374 else if (!strcmp (tok, "machine"))
375 last_token = tok_machine;
377 else if (!strcmp (tok, "password"))
378 last_token = tok_password;
381 fprintf (stderr, _("%s: %s:%d: unknown token \"%s\"\n"),
382 exec_name, path, ln, tok);
390 /* Finalize the last machine entry we found. */
391 maybe_add_to_list (¤t, &retval);
394 /* Reverse the order of the list so that it appears in file order. */
399 acc_t *saved_reference;
401 /* Change the direction of the pointers. */
402 saved_reference = current->next;
403 current->next = retval;
405 /* Advance to the next node. */
407 current = saved_reference;
414 /* Free a netrc list. */
424 xfree_null (l->passwd);
425 xfree_null (l->host);
432 #include <sys/types.h>
433 #include <sys/stat.h>
436 main (int argc, char **argv)
439 char *program_name, *file, *target;
442 if (argc < 2 || argc > 3)
444 fprintf (stderr, _("Usage: %s NETRC [HOSTNAME]\n"), argv[0]);
448 program_name = argv[0];
452 if (stat (file, &sb))
454 fprintf (stderr, _("%s: cannot stat %s: %s\n"), argv[0], file,
459 head = parse_netrc (file);
463 /* Skip if we have a target and this isn't it. */
464 if (target && a->host && strcmp (target, a->host))
472 /* Print the host name if we have no target. */
474 fputs (a->host, stdout);
476 fputs ("DEFAULT", stdout);
481 /* Print the account name. */
482 fputs (a->acc, stdout);
486 /* Print the password, if there is any. */
488 fputs (a->passwd, stdout);
491 fputc ('\n', stdout);
493 /* Exit if we found the target. */
499 /* Exit with failure if we had a target, success otherwise. */
505 #endif /* STANDALONE */