diplodocus.org Git - nmh/blob - docs/historical/mh-6.8.5/sbr/ruserpass.c

   1 /*
   2  * Copyright (c) 1985 Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms are permitted
   6  * provided that the above copyright notice and this paragraph are
   7  * duplicated in all such forms and that any documentation,
   8  * advertising materials, and other materials related to such
   9  * distribution and use acknowledge that the software was developed
  10  * by the University of California, Berkeley.  The name of the
  11  * University may not be used to endorse or promote products derived
  12  * from this software without specific prior written permission.
  13  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  16  */
  17
  18 #ifndef lint
  19 static char sccsid[] = "@(#)ruserpass.c 5.1 (Berkeley) 3/1/89";
  20 #endif /* not lint */
  21
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <ctype.h>
  27 #include <pwd.h>
  28 #include <errno.h>
  29
  30 char    *malloc(), *index(), *getenv(), *getpass(), *getlogin();
  31 char    *strcpy();
  32 static  FILE *cfile;
  33
  34 #ifndef MAXHOSTNAMELEN
  35 #define MAXHOSTNAMELEN 64
  36 #endif
  37
  38 #define DEFAULT 1
  39 #define LOGIN   2
  40 #define PASSWD  3
  41 #define ACCOUNT 4
  42 #define MACDEF  5
  43 #define ID      10
  44 #define MACH    11
  45
  46 static int token();
  47 static char tokval[100];
  48
  49 static struct toktab {
  50         char *tokstr;
  51         int tval;
  52 } toktab[]= {
  53         "default",      DEFAULT,
  54         "login",        LOGIN,
  55         "password",     PASSWD,
  56         "passwd",       PASSWD,
  57         "account",      ACCOUNT,
  58         "machine",      MACH,
  59         "macdef",       MACDEF,
  60         0,              0
  61 };
  62
  63 ruserpass(host, aname, apass)
  64      char *host, **aname, **apass;
  65 {
  66         char *hdir, buf[BUFSIZ], *tmp;
  67         char myname[MAXHOSTNAMELEN], *mydomain;
  68         int t, i, c, usedefault = 0;
  69         struct stat stb;
  70         extern int errno;
  71
  72         hdir = getenv("HOME");
  73         if (hdir == NULL)
  74                 hdir = ".";
  75         (void) sprintf(buf, "%s/.netrc", hdir);
  76         cfile = fopen(buf, "r");
  77         if (cfile == NULL) {
  78                 if (errno != ENOENT)
  79                         perror(buf);
  80                 goto done;
  81         }
  82
  83         while ((t = token())) switch(t) {
  84         case DEFAULT:
  85                 usedefault = 1;
  86                 /* FALL THROUGH */
  87
  88         case MACH:
  89                 if (!usedefault) {
  90                         if (token() != ID)
  91                                 continue;
  92                         /*
  93                          * Allow match either for user's host name.
  94                          */
  95                         if (strcasecmp(host, tokval) == 0)
  96                                 goto match;
  97                         continue;
  98                 }
  99         match:
 100                 while ((t = token()) && t != MACH && t != DEFAULT) switch(t) {
 101
 102                 case LOGIN:
 103                         if (token() && *aname == 0) {
 104                                 *aname = malloc((unsigned) strlen(tokval) + 1);
 105                                 (void) strcpy(*aname, tokval);
 106                         }
 107                         break;
 108                 case PASSWD:
 109                         if (fstat(fileno(cfile), &stb) >= 0 &&
 110                             (stb.st_mode & 077) != 0) {
 111         fprintf(stderr, "Error - .netrc file not correct mode.\n");
 112         fprintf(stderr, "Remove password or correct mode.\n");
 113                                 goto bad;
 114                         }
 115                         if (token() && *apass == 0) {
 116                                 *apass = malloc((unsigned) strlen(tokval) + 1);
 117                                 (void) strcpy(*apass, tokval);
 118                         }
 119                         break;
 120                 case ACCOUNT:
 121                         break;
 122
 123                 case MACDEF:
 124                         goto done_close;
 125                         break;
 126                 default:
 127         fprintf(stderr, "Unknown .netrc keyword %s\n", tokval);
 128                         break;
 129                 }
 130                 goto done;
 131         }
 132
 133 done_close:
 134         (void) fclose(cfile);
 135
 136 done:
 137         if (!*aname) {
 138                 char tmp[80];
 139                 char *myname;
 140
 141                 if ((myname = getlogin()) == NULL) {
 142                         struct passwd *pp;
 143
 144                         if ((pp = getpwuid (getuid())) != NULL)
 145                                 myname = pp->pw_name;
 146                 }
 147                 printf("Name (%s:%s): ", host, myname);
 148
 149                 (void) fgets(tmp, sizeof(tmp) - 1, stdin);
 150                 tmp[strlen(tmp) - 1] = '\0';
 151                 if (*tmp != '\0') {
 152                         myname = tmp;
 153                 }
 154
 155                 *aname = malloc((unsigned) strlen(myname) + 1);
 156                 strcpy (*aname, myname);
 157         }
 158
 159         if (!*apass) {
 160                 char prompt[256];
 161                 char *mypass;
 162
 163                 sprintf(prompt, "Password (%s:%s): ", host, *aname);
 164                 mypass = getpass (prompt);
 165
 166                 if (*mypass == '\0') {
 167                         mypass = *aname;
 168                 }
 169
 170                 *apass = malloc((unsigned) strlen(mypass) + 1);
 171                 strcpy (*apass, mypass);
 172         }
 173
 174         return(0);
 175 bad:
 176         (void) fclose(cfile);
 177         return(-1);
 178 }
 179
 180 static int
 181 token()
 182 {
 183         char *cp;
 184         int c;
 185         struct toktab *t;
 186
 187         if (feof(cfile))
 188                 return (0);
 189         while ((c = getc(cfile)) != EOF &&
 190             (c == '\n' || c == '\t' || c == ' ' || c == ','))
 191                 continue;
 192         if (c == EOF)
 193                 return (0);
 194         cp = tokval;
 195         if (c == '"') {
 196                 while ((c = getc(cfile)) != EOF && c != '"') {
 197                         if (c == '\\')
 198                                 c = getc(cfile);
 199                         *cp++ = c;
 200                 }
 201         } else {
 202                 *cp++ = c;
 203                 while ((c = getc(cfile)) != EOF
 204                     && c != '\n' && c != '\t' && c != ' ' && c != ',') {
 205                         if (c == '\\')
 206                                 c = getc(cfile);
 207                         *cp++ = c;
 208                 }
 209         }
 210         *cp = 0;
 211         if (tokval[0] == 0)
 212                 return (0);
 213         for (t = toktab; t->tokstr; t++)
 214                 if (!strcmp(t->tokstr, tokval))
 215                         return (t->tval);
 216         return (ID);
 217 }