source3/lib/popt_common.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Common popt routines
   4
   5    Copyright (C) Tim Potter 2001,2002
   6    Copyright (C) Jelmer Vernooij 2002,2003
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24
  25 /* Handle command line options:
  26  *              -d,--debuglevel
  27  *              -s,--configfile
  28  *              -O,--socket-options
  29  *              -V,--version
  30  *              -l,--log-base
  31  *              -n,--netbios-name
  32  *              -W,--workgroup
  33  *              -i,--scope
  34  */
  35
  36 extern pstring user_socket_options;
  37 extern BOOL AllowDebugChange;
  38
  39 struct user_auth_info cmdline_auth_info;
  40
  41 static void popt_common_callback(poptContext con,
  42                            enum poptCallbackReason reason,
  43                            const struct poptOption *opt,
  44                            const char *arg, const void *data)
  45 {
  46         pstring logfile;
  47         const char *pname;
  48
  49         /* Find out basename of current program */
  50         pname = strrchr_m(poptGetInvocationName(con),'/');
  51
  52         if (!pname)
  53                 pname = poptGetInvocationName(con);
  54         else
  55                 pname++;
  56
  57         if (reason == POPT_CALLBACK_REASON_PRE) {
  58                 pstr_sprintf(logfile, "%s/log.%s", dyn_LOGFILEBASE, pname);
  59                 lp_set_logfile(logfile);
  60                 return;
  61         }
  62
  63         switch(opt->val) {
  64         case 'd':
  65                 if (arg) {
  66                         debug_parse_levels(arg);
  67                         AllowDebugChange = False;
  68                 }
  69                 break;
  70
  71         case 'V':
  72                 printf( "Version %s\n", VERSION );
  73                 exit(0);
  74                 break;
  75
  76         case 'O':
  77                 if (arg) {
  78                         pstrcpy(user_socket_options,arg);
  79                 }
  80                 break;
  81
  82         case 's':
  83                 if (arg) {
  84                         pstrcpy(dyn_CONFIGFILE, arg);
  85                 }
  86                 break;
  87
  88         case 'n':
  89                 if (arg) {
  90                         set_global_myname(arg);
  91                 }
  92                 break;
  93
  94         case 'l':
  95                 if (arg) {
  96                         pstr_sprintf(logfile, "%s/log.%s", arg, pname);
  97                         lp_set_logfile(logfile);
  98                 }
  99                 break;
 100
 101         case 'i':
 102                 if (arg) {
 103                           set_global_scope(arg);
 104                 }
 105                 break;
 106
 107         case 'W':
 108                 if (arg) {
 109                         set_global_myworkgroup(arg);
 110                 }
 111                 break;
 112         }
 113 }
 114
 115 struct poptOption popt_common_connection[] = {
 116         { NULL, 0, POPT_ARG_CALLBACK, popt_common_callback },
 117         { "socket-options", 'O', POPT_ARG_STRING, NULL, 'O', "socket options to use",
 118           "SOCKETOPTIONS" },
 119         { "netbiosname", 'n', POPT_ARG_STRING, NULL, 'n', "Primary netbios name", "NETBIOSNAME" },
 120         { "workgroup", 'W', POPT_ARG_STRING, NULL, 'W', "Set the workgroup name", "WORKGROUP" },
 121         { "scope", 'i', POPT_ARG_STRING, NULL, 'i', "Use this Netbios scope", "SCOPE" },
 122         POPT_TABLEEND
 123 };
 124
 125 struct poptOption popt_common_samba[] = {
 126         { NULL, 0, POPT_ARG_CALLBACK|POPT_CBFLAG_PRE, popt_common_callback },
 127         { "debuglevel", 'd', POPT_ARG_STRING, NULL, 'd', "Set debug level", "DEBUGLEVEL" },
 128         { "configfile", 's', POPT_ARG_STRING, NULL, 's', "Use alternative configuration file", "CONFIGFILE" },
 129         { "log-basename", 'l', POPT_ARG_STRING, NULL, 'l', "Basename for log/debug files", "LOGFILEBASE" },
 130         { "version", 'V', POPT_ARG_NONE, NULL, 'V', "Print version" },
 131         POPT_TABLEEND
 132 };
 133
 134 struct poptOption popt_common_version[] = {
 135         { NULL, 0, POPT_ARG_CALLBACK, popt_common_callback },
 136         { "version", 'V', POPT_ARG_NONE, NULL, 'V', "Print version" },
 137         POPT_TABLEEND
 138 };
 139
 140
 141
 142 /****************************************************************************
 143  * get a password from a a file or file descriptor
 144  * exit on failure
 145  * ****************************************************************************/
 146 static void get_password_file(struct user_auth_info *a)
 147 {
 148         int fd = -1;
 149         char *p;
 150         BOOL close_it = False;
 151         pstring spec;
 152         char pass[128];
 153
 154         if ((p = getenv("PASSWD_FD")) != NULL) {
 155                 pstrcpy(spec, "descriptor ");
 156                 pstrcat(spec, p);
 157                 sscanf(p, "%d", &fd);
 158                 close_it = False;
 159         } else if ((p = getenv("PASSWD_FILE")) != NULL) {
 160                 fd = sys_open(p, O_RDONLY, 0);
 161                 pstrcpy(spec, p);
 162                 if (fd < 0) {
 163                         fprintf(stderr, "Error opening PASSWD_FILE %s: %s\n",
 164                                         spec, strerror(errno));
 165                         exit(1);
 166                 }
 167                 close_it = True;
 168         }
 169
 170         for(p = pass, *p = '\0'; /* ensure that pass is null-terminated */
 171                 p && p - pass < sizeof(pass);) {
 172                 switch (read(fd, p, 1)) {
 173                 case 1:
 174                         if (*p != '\n' && *p != '\0') {
 175                                 *++p = '\0'; /* advance p, and null-terminate pass */
 176                                 break;
 177                         }
 178                 case 0:
 179                         if (p - pass) {
 180                                 *p = '\0'; /* null-terminate it, just in case... */
 181                                 p = NULL; /* then force the loop condition to become false */
 182                                 break;
 183                         } else {
 184                                 fprintf(stderr, "Error reading password from file %s: %s\n",
 185                                                 spec, "empty password\n");
 186                                 exit(1);
 187                         }
 188
 189                 default:
 190                         fprintf(stderr, "Error reading password from file %s: %s\n",
 191                                         spec, strerror(errno));
 192                         exit(1);
 193                 }
 194         }
 195         pstrcpy(a->password, pass);
 196         if (close_it)
 197                 close(fd);
 198 }
 199
 200 static void get_credentials_file(const char *file, struct user_auth_info *info)
 201 {
 202         XFILE *auth;
 203         fstring buf;
 204         uint16 len = 0;
 205         char *ptr, *val, *param;
 206
 207         if ((auth=x_fopen(file, O_RDONLY, 0)) == NULL)
 208         {
 209                 /* fail if we can't open the credentials file */
 210                 d_printf("ERROR: Unable to open credentials file!\n");
 211                 exit(-1);
 212         }
 213
 214         while (!x_feof(auth))
 215         {
 216                 /* get a line from the file */
 217                 if (!x_fgets(buf, sizeof(buf), auth))
 218                         continue;
 219                 len = strlen(buf);
 220
 221                 if ((len) && (buf[len-1]=='\n'))
 222                 {
 223                         buf[len-1] = '\0';
 224                         len--;
 225                 }
 226                 if (len == 0)
 227                         continue;
 228
 229                 /* break up the line into parameter & value.
 230                  * will need to eat a little whitespace possibly */
 231                 param = buf;
 232                 if (!(ptr = strchr_m (buf, '=')))
 233                         continue;
 234
 235                 val = ptr+1;
 236                 *ptr = '\0';
 237
 238                 /* eat leading white space */
 239                 while ((*val!='\0') && ((*val==' ') || (*val=='\t')))
 240                         val++;
 241
 242                 if (strwicmp("password", param) == 0)
 243                 {
 244                         pstrcpy(info->password, val);
 245                         info->got_pass = True;
 246                 }
 247                 else if (strwicmp("username", param) == 0)
 248                         pstrcpy(info->username, val);
 249                 else if (strwicmp("domain", param) == 0)
 250                         set_global_myworkgroup(val);
 251                 memset(buf, 0, sizeof(buf));
 252         }
 253         x_fclose(auth);
 254 }
 255
 256 /* Handle command line options:
 257  *              -U,--user
 258  *              -A,--authentication-file
 259  *              -k,--use-kerberos
 260  *              -N,--no-pass
 261  */
 262
 263
 264 static void popt_common_credentials_callback(poptContext con,
 265                                                                                          enum poptCallbackReason reason,
 266                                                                                          const struct poptOption *opt,
 267                                                                                          const char *arg, const void *data)
 268 {
 269         char *p;
 270
 271         if (reason == POPT_CALLBACK_REASON_PRE) {
 272                 cmdline_auth_info.use_kerberos = False;
 273                 cmdline_auth_info.got_pass = False;
 274                 pstrcpy(cmdline_auth_info.username, "GUEST");
 275
 276                 if (getenv("LOGNAME"))pstrcpy(cmdline_auth_info.username,getenv("LOGNAME"));
 277
 278                 if (getenv("USER")) {
 279                         pstrcpy(cmdline_auth_info.username,getenv("USER"));
 280
 281                         if ((p = strchr_m(cmdline_auth_info.username,'%'))) {
 282                                 *p = 0;
 283                                 pstrcpy(cmdline_auth_info.password,p+1);
 284                                 cmdline_auth_info.got_pass = True;
 285                                 memset(strchr_m(getenv("USER"),'%')+1,'X',strlen(cmdline_auth_info.password));
 286                         }
 287                 }
 288
 289                 if (getenv("PASSWD")) {
 290                         pstrcpy(cmdline_auth_info.password,getenv("PASSWD"));
 291                         cmdline_auth_info.got_pass = True;
 292                 }
 293
 294                 if (getenv("PASSWD_FD") || getenv("PASSWD_FILE")) {
 295                         get_password_file(&cmdline_auth_info);
 296                         cmdline_auth_info.got_pass = True;
 297                 }
 298
 299                 return;
 300         }
 301
 302         switch(opt->val) {
 303         case 'U':
 304                 {
 305                         char *lp;
 306
 307                         pstrcpy(cmdline_auth_info.username,arg);
 308                         if ((lp=strchr_m(cmdline_auth_info.username,'%'))) {
 309                                 *lp = 0;
 310                                 pstrcpy(cmdline_auth_info.password,lp+1);
 311                                 cmdline_auth_info.got_pass = True;
 312                                 memset(strchr_m(arg,'%')+1,'X',strlen(cmdline_auth_info.password));
 313                         }
 314                 }
 315                 break;
 316
 317         case 'A':
 318                 get_credentials_file(arg, &cmdline_auth_info);
 319                 break;
 320
 321         case 'k':
 322 #ifndef HAVE_KRB5
 323                 d_printf("No kerberos support compiled in\n");
 324                 exit(1);
 325 #else
 326                 cmdline_auth_info.use_kerberos = True;
 327                 cmdline_auth_info.got_pass = True;
 328 #endif
 329                 break;
 330         }
 331 }
 332
 333
 334
 335 struct poptOption popt_common_credentials[] = {
 336         { NULL, 0, POPT_ARG_CALLBACK|POPT_CBFLAG_PRE, popt_common_credentials_callback },
 337         { "user", 'U', POPT_ARG_STRING, NULL, 'U', "Set the network username", "USERNAME" },
 338         { "no-pass", 'N', POPT_ARG_NONE, &cmdline_auth_info.got_pass, 0, "Don't ask for a password" },
 339         { "kerberos", 'k', POPT_ARG_NONE, &cmdline_auth_info.use_kerberos, 'k', "Use kerberos (active directory) authentication" },
 340         { "authentication-file", 'A', POPT_ARG_STRING, NULL, 'A', "Get the credentials from a file", "FILE" },
 341         POPT_TABLEEND
 342 };