1 /* netrc.c -- parse the .netrc file to get hosts, accounts, and passwords
2 Copyright (C) 1996, Free Software Foundation, Inc.
3 Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19 /* Compile with -DSTANDALONE to test this module. */
31 #include "fetchmail.h"
35 /* Normally defined in xstrdup.c. */
36 # define xstrdup strdup
38 /* Normally defined in xmalloc.c */
39 # define xmalloc malloc
40 # define xrealloc realloc
43 /* Maybe add NEWENTRY to the account information list, LIST. NEWENTRY is
44 set to a ready-to-use netrc_entry, in any event. */
46 maybe_add_to_list (newentry, list)
47 netrc_entry **newentry;
54 /* We need an account name in order to add the entry to the list. */
55 if (a && ! a->account)
57 /* Free any allocated space. */
66 /* Add the current machine into our list. */
71 /* Allocate a new netrc_entry structure. */
72 a = (netrc_entry *) xmalloc (sizeof (netrc_entry));
75 /* Zero the structure, so that it is ready to use. */
76 memset (a, 0, sizeof(*a));
78 /* Return the new pointers. */
85 /* Parse FILE as a .netrc file (as described in ftp(1)), and return a
86 list of entries. NULL is returned if the file could not be
93 char buf[POPBUFSIZE+1], *p, *tok, *premature_token;
94 netrc_entry *current, *retval;
97 /* The latest token we've seen in the file. */
100 tok_nothing, tok_account, tok_login, tok_macdef, tok_machine, tok_password
101 } last_token = tok_nothing;
103 current = retval = NULL;
105 fp = fopen (file, "r");
108 /* Just return NULL if we can't open the file. */
112 /* Initialize the file data. */
114 premature_token = NULL;
116 /* While there are lines in the file... */
117 while (fgets(buf, POPBUFSIZE, fp))
121 /* Strip trailing CRLF */
122 p = buf + strlen(buf) - 1;
123 while (*p && isspace(*p))
126 /* Parse the line. */
129 /* If the line is empty... */
131 if (last_token == tok_macdef) /* end of macro */
132 last_token = tok_nothing;
134 continue; /* otherwise ignore it */
136 /* If we are defining macros, then skip parsing the line. */
137 while (*p && last_token != tok_macdef)
139 /* Skip any whitespace. */
140 while (*p && isspace (*p))
143 /* Discard end-of-line comments. */
149 /* Find the end of the token. */
150 while (*p && !isspace (*p))
153 /* Null-terminate the token, if it isn't already. */
161 current->account = (char *) xstrdup (tok);
163 premature_token = "login";
167 /* Start a new machine entry. */
168 maybe_add_to_list (¤t, &retval);
169 current->host = (char *) xstrdup (tok);
174 current->password = (char *) xstrdup (tok);
176 premature_token = "password";
179 /* We handle most of tok_macdef above. */
182 premature_token = "macdef";
185 /* We don't handle the account keyword at all. */
188 premature_token = "account";
191 /* We handle tok_nothing below this switch. */
199 error_at_line (0, 0, file, ln,
200 _("warning: found \"%s\" before any host names"),
204 "%s:%d: warning: found \"%s\" before any host names\n",
205 file, ln, premature_token);
207 premature_token = NULL;
210 if (last_token != tok_nothing)
211 /* We got a value, so reset the token state. */
212 last_token = tok_nothing;
215 /* Fetch the next token. */
216 if (!strcmp (tok, "account"))
217 last_token = tok_account;
219 if (!strcmp (tok, "default"))
221 maybe_add_to_list (¤t, &retval);
223 else if (!strcmp (tok, "login"))
224 last_token = tok_login;
226 else if (!strcmp (tok, "macdef"))
227 last_token = tok_macdef;
229 else if (!strcmp (tok, "machine"))
230 last_token = tok_machine;
232 else if (!strcmp (tok, "password"))
233 last_token = tok_password;
237 fprintf (stderr, "%s:%d: warning: unknown token \"%s\"\n",
246 /* Finalize the last machine entry we found. */
247 maybe_add_to_list (¤t, &retval);
250 /* Reverse the order of the list so that it appears in file order. */
255 netrc_entry *saved_reference;
257 /* Change the direction of the pointers. */
258 saved_reference = current->next;
259 current->next = retval;
261 /* Advance to the next node. */
263 current = saved_reference;
270 /* Return the netrc entry from LIST corresponding to HOST. NULL is
271 returned if no such entry exists. */
273 search_netrc (list, host)
277 /* Look for the HOST in LIST. */
281 /* We hit the default entry. */
284 else if (!strcmp (list->host, host))
285 /* We found a matching entry. */
291 /* Return the matching entry, or NULL. */
297 #include <sys/types.h>
298 #include <sys/stat.h>
308 char *program_name, *file, *target;
309 netrc_entry *head, *a;
313 fprintf (stderr, "Usage: %s NETRC [HOSTNAME]...\n", argv[0]);
317 program_name = argv[0];
321 if (stat (file, &sb))
323 fprintf (stderr, "%s: cannot stat %s: %s\n", argv[0], file,
328 head = parse_netrc (file);
331 fprintf (stderr, "%s: no entries found in %s\n", argv[0], file);
339 for (i = 2; i < argc; i++)
341 /* Print out the host that we are checking for. */
342 fputs (argv[i], stdout);
344 a = search_netrc (head, argv[i]);
347 /* Print out the account and password (if any). */
349 fputs (a->account, stdout);
353 fputs (a->password, stdout);
359 fputc ('\n', stdout);
364 /* Print out the entire contents of the netrc. */
368 /* Print the host name. */
370 fputs (a->host, stdout);
372 fputs ("DEFAULT", stdout);
376 /* Print the account name. */
377 fputs (a->account, stdout);
381 /* Print the password, if there is any. */
383 fputs (a->password, stdout);
386 fputc ('\n', stdout);
392 #endif /* STANDALONE */