fdwalk should return 0 on an empty directory
[kopensolaris-gnu/glibc.git] / inet / ruserpass.c
1 /*
2  * Copyright (c) 1985, 1993, 1994
3  *      The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 4. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29
30 #if defined(LIBC_SCCS) && !defined(lint)
31 static char sccsid[] = "@(#)ruserpass.c 8.3 (Berkeley) 4/2/94";
32 #endif /* not lint */
33
34 #include <sys/types.h>
35 #include <sys/stat.h>
36
37 #include <ctype.h>
38 #include <err.h>
39 #include <errno.h>
40 #include <netdb.h>
41 #include <stdio.h>
42 #include <stdio_ext.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46 #include <libintl.h>
47
48 /* #include "ftp_var.h" */
49
50 static  int token (void);
51 static  FILE *cfile;
52
53 #define DEFAULT 1
54 #define LOGIN   2
55 #define PASSWD  3
56 #define ACCOUNT 4
57 #define MACDEF  5
58 #define ID      10
59 #define MACHINE 11
60
61 static char tokval[100];
62
63 static const char tokstr[] =
64 {
65 #define TOK_DEFAULT_IDX 0
66   "default\0"
67 #define TOK_LOGIN_IDX   (TOK_DEFAULT_IDX + sizeof "default")
68   "login\0"
69 #define TOK_PASSWORD_IDX (TOK_LOGIN_IDX + sizeof "login")
70   "password\0"
71 #define TOK_PASSWD_IDX  (TOK_PASSWORD_IDX + sizeof "password")
72   "passwd\0"
73 #define TOK_ACCOUNT_IDX (TOK_PASSWD_IDX + sizeof "passwd")
74   "account\0"
75 #define TOK_MACHINE_IDX (TOK_ACCOUNT_IDX + sizeof "account")
76   "machine\0"
77 #define TOK_MACDEF_IDX  (TOK_MACHINE_IDX + sizeof "machine")
78   "macdef"
79 };
80
81 static const struct toktab {
82         int tokstr_off;
83         int tval;
84 } toktab[]= {
85         { TOK_DEFAULT_IDX,      DEFAULT },
86         { TOK_LOGIN_IDX,        LOGIN },
87         { TOK_PASSWORD_IDX,     PASSWD },
88         { TOK_PASSWD_IDX,       PASSWD },
89         { TOK_ACCOUNT_IDX,      ACCOUNT },
90         { TOK_MACHINE_IDX,      MACHINE },
91         { TOK_MACDEF_IDX,       MACDEF }
92 };
93
94
95
96 int
97 ruserpass(host, aname, apass)
98         const char *host, **aname, **apass;
99 {
100         char *hdir, *buf, *tmp;
101         char myname[1024], *mydomain;
102         int t, usedefault = 0;
103         struct stat64 stb;
104
105         hdir = __secure_getenv("HOME");
106         if (hdir == NULL) {
107                 /* If we can't get HOME, fail instead of trying ".",
108                    which is no improvement. This really should call
109                    getpwuid(getuid()).  */
110                 /*hdir = ".";*/
111                 return -1;
112         }
113
114         buf = alloca (strlen (hdir) + 8);
115
116         __stpcpy (__stpcpy (buf, hdir), "/.netrc");
117         cfile = fopen(buf, "rc");
118         if (cfile == NULL) {
119                 if (errno != ENOENT)
120                         warn("%s", buf);
121                 return (0);
122         }
123         /* No threads use this stream.  */
124         __fsetlocking (cfile, FSETLOCKING_BYCALLER);
125         if (__gethostname(myname, sizeof(myname)) < 0)
126                 myname[0] = '\0';
127         mydomain = __strchrnul(myname, '.');
128 next:
129         while ((t = token())) switch(t) {
130
131         case DEFAULT:
132                 usedefault = 1;
133                 /* FALL THROUGH */
134
135         case MACHINE:
136                 if (!usedefault) {
137                         if (token() != ID)
138                                 continue;
139                         /*
140                          * Allow match either for user's input host name
141                          * or official hostname.  Also allow match of
142                          * incompletely-specified host in local domain.
143                          */
144                         if (__strcasecmp(host, tokval) == 0)
145                                 goto match;
146 /*                      if (__strcasecmp(hostname, tokval) == 0)
147                                 goto match;
148                         if ((tmp = strchr(hostname, '.')) != NULL &&
149                             __strcasecmp(tmp, mydomain) == 0 &&
150                             __strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
151                             tokval[tmp - hostname] == '\0')
152                                 goto match; */
153                         if ((tmp = strchr(host, '.')) != NULL &&
154                             __strcasecmp(tmp, mydomain) == 0 &&
155                             __strncasecmp(host, tokval, tmp - host) == 0 &&
156                             tokval[tmp - host] == '\0')
157                                 goto match;
158                         continue;
159                 }
160         match:
161                 while ((t = token()) && t != MACHINE && t != DEFAULT) switch(t) {
162
163                 case LOGIN:
164                         if (token()) {
165                                 if (*aname == 0) {
166                                   char *newp;
167                                   newp = malloc((unsigned) strlen(tokval) + 1);
168                                   if (newp == NULL)
169                                     {
170                                       warnx(_("out of memory"));
171                                       goto bad;
172                                     }
173                                   *aname = strcpy(newp, tokval);
174                                 } else {
175                                         if (strcmp(*aname, tokval))
176                                                 goto next;
177                                 }
178                         }
179                         break;
180                 case PASSWD:
181                         if (strcmp(*aname, "anonymous") &&
182                             fstat64(fileno(cfile), &stb) >= 0 &&
183                             (stb.st_mode & 077) != 0) {
184         warnx(_("Error: .netrc file is readable by others."));
185         warnx(_("Remove password or make file unreadable by others."));
186                                 goto bad;
187                         }
188                         if (token() && *apass == 0) {
189                                 char *newp;
190                                 newp = malloc((unsigned) strlen(tokval) + 1);
191                                 if (newp == NULL)
192                                   {
193                                     warnx(_("out of memory"));
194                                     goto bad;
195                                   }
196                                 *apass = strcpy(newp, tokval);
197                         }
198                         break;
199                 case ACCOUNT:
200 #if 0
201                         if (fstat64(fileno(cfile), &stb) >= 0
202                             && (stb.st_mode & 077) != 0) {
203         warnx("Error: .netrc file is readable by others.");
204         warnx("Remove account or make file unreadable by others.");
205                                 goto bad;
206                         }
207                         if (token() && *aacct == 0) {
208                                 *aacct = malloc((unsigned) strlen(tokval) + 1);
209                                 (void) strcpy(*aacct, tokval);
210                         }
211 #endif
212                         break;
213                 case MACDEF:
214 #if 0
215                         if (proxy) {
216                                 (void) fclose(cfile);
217                                 return (0);
218                         }
219                         while ((c=getc_unlocked(cfile)) != EOF && c == ' '
220                                || c == '\t');
221                         if (c == EOF || c == '\n') {
222                                 printf("Missing macdef name argument.\n");
223                                 goto bad;
224                         }
225                         if (macnum == 16) {
226                                 printf("Limit of 16 macros have already been defined\n");
227                                 goto bad;
228                         }
229                         tmp = macros[macnum].mac_name;
230                         *tmp++ = c;
231                         for (i=0; i < 8 && (c=getc_unlocked(cfile)) != EOF &&
232                             !isspace(c); ++i) {
233                                 *tmp++ = c;
234                         }
235                         if (c == EOF) {
236                                 printf("Macro definition missing null line terminator.\n");
237                                 goto bad;
238                         }
239                         *tmp = '\0';
240                         if (c != '\n') {
241                                 while ((c=getc_unlocked(cfile)) != EOF
242                                        && c != '\n');
243                         }
244                         if (c == EOF) {
245                                 printf("Macro definition missing null line terminator.\n");
246                                 goto bad;
247                         }
248                         if (macnum == 0) {
249                                 macros[macnum].mac_start = macbuf;
250                         }
251                         else {
252                                 macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
253                         }
254                         tmp = macros[macnum].mac_start;
255                         while (tmp != macbuf + 4096) {
256                                 if ((c=getc_unlocked(cfile)) == EOF) {
257                                 printf("Macro definition missing null line terminator.\n");
258                                         goto bad;
259                                 }
260                                 *tmp = c;
261                                 if (*tmp == '\n') {
262                                         if (*(tmp-1) == '\0') {
263                                            macros[macnum++].mac_end = tmp - 1;
264                                            break;
265                                         }
266                                         *tmp = '\0';
267                                 }
268                                 tmp++;
269                         }
270                         if (tmp == macbuf + 4096) {
271                                 printf("4K macro buffer exceeded\n");
272                                 goto bad;
273                         }
274 #endif
275                         break;
276                 default:
277                         warnx(_("Unknown .netrc keyword %s"), tokval);
278                         break;
279                 }
280                 goto done;
281         }
282 done:
283         (void) fclose(cfile);
284         return (0);
285 bad:
286         (void) fclose(cfile);
287         return (-1);
288 }
289 libc_hidden_def (ruserpass)
290
291 static int
292 token()
293 {
294         char *cp;
295         int c;
296         int i;
297
298         if (feof_unlocked(cfile) || ferror_unlocked(cfile))
299                 return (0);
300         while ((c = getc_unlocked(cfile)) != EOF &&
301             (c == '\n' || c == '\t' || c == ' ' || c == ','))
302                 continue;
303         if (c == EOF)
304                 return (0);
305         cp = tokval;
306         if (c == '"') {
307                 while ((c = getc_unlocked(cfile)) != EOF && c != '"') {
308                         if (c == '\\')
309                                 c = getc_unlocked(cfile);
310                         *cp++ = c;
311                 }
312         } else {
313                 *cp++ = c;
314                 while ((c = getc_unlocked(cfile)) != EOF
315                     && c != '\n' && c != '\t' && c != ' ' && c != ',') {
316                         if (c == '\\')
317                                 c = getc_unlocked(cfile);
318                         *cp++ = c;
319                 }
320         }
321         *cp = 0;
322         if (tokval[0] == 0)
323                 return (0);
324         for (i = 0; i < (int) (sizeof (toktab) / sizeof (toktab[0])); ++i)
325                 if (!strcmp(&tokstr[toktab[i].tokstr_off], tokval))
326                         return toktab[i].tval;
327         return (ID);
328 }