/*      $NetBSD: get_args.c,v 1.1.1.3 2015/01/17 16:34:15 christos Exp $        */

/*
* Copyright (c) 1997-2014 Erez Zadok
* Copyright (c) 1990 Jan-Simon Pendry
* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry at Imperial College, London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*
* File: am-utils/amd/get_args.c
*
*/

/*
* Argument decode
*/

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
#include <amd.h>

/* include auto-generated version file */
#include <build_version.h>

char *amu_conf_file = "/etc/amd.conf"; /* default amd configuration file */
char *conf_tag = NULL;          /* default conf file tags to use */
int usage = 0;
int use_conf_file = 0;          /* default don't use amd.conf file */
char *mnttab_file_name = NULL;  /* symbol must be available always */


/*
* Return the version string (dynamic buffer)
*/
char *
get_version_string(void)
{
 char *vers = NULL;
 char tmpbuf[1024];
 char *wire_buf;
 int wire_buf_len = 0;
 size_t len;             /* max allocated length (to avoid buf overflow) */

 /*
  * First get dynamic string listing all known networks.
  * This could be a long list, if host has lots of interfaces.
  */
 wire_buf = print_wires();
 if (wire_buf)
   wire_buf_len = strlen(wire_buf);

 len = 2048 + wire_buf_len;
 vers = xmalloc(len);
 xsnprintf(vers, len, "%s\n%s\n%s\n%s\n",
           "Copyright (c) 1997-2014 Erez Zadok",
           "Copyright (c) 1990 Jan-Simon Pendry",
           "Copyright (c) 1990 Imperial College of Science, Technology & Medicine",
           "Copyright (c) 1990 The Regents of the University of California.");
 xsnprintf(tmpbuf, sizeof(tmpbuf), "%s version %s (build %d).\n",
           PACKAGE_NAME, PACKAGE_VERSION, AMU_BUILD_VERSION);
 xstrlcat(vers, tmpbuf, len);
 xsnprintf(tmpbuf, sizeof(tmpbuf), "Report bugs to %s.\n", PACKAGE_BUGREPORT);
 xstrlcat(vers, tmpbuf, len);
 xsnprintf(tmpbuf, sizeof(tmpbuf), "Configured by %s@%s on date %s.\n",
           USER_NAME, HOST_NAME, CONFIG_DATE);
 xstrlcat(vers, tmpbuf, len);
 xsnprintf(tmpbuf, sizeof(tmpbuf), "Built by %s@%s on date %s.\n",
           BUILD_USER, BUILD_HOST, BUILD_DATE);
 xstrlcat(vers, tmpbuf, len);
 xsnprintf(tmpbuf, sizeof(tmpbuf), "cpu=%s (%s-endian), arch=%s, karch=%s.\n",
           cpu, endian, gopt.arch, gopt.karch);
 xstrlcat(vers, tmpbuf, len);
 xsnprintf(tmpbuf, sizeof(tmpbuf), "full_os=%s, os=%s, osver=%s, vendor=%s, distro=%s.\n",
           gopt.op_sys_full, gopt.op_sys, gopt.op_sys_ver, gopt.op_sys_vendor, DISTRO_NAME);
 xstrlcat(vers, tmpbuf, len);
 xsnprintf(tmpbuf, sizeof(tmpbuf), "domain=%s, host=%s, hostd=%s.\n",
           hostdomain, am_get_hostname(), hostd);
 xstrlcat(vers, tmpbuf, len);

 xstrlcat(vers, "Map support for: ", len);
 mapc_showtypes(tmpbuf, sizeof(tmpbuf));
 xstrlcat(vers, tmpbuf, len);
 xstrlcat(vers, ".\nAMFS: ", len);
 ops_showamfstypes(tmpbuf, sizeof(tmpbuf));
 xstrlcat(vers, tmpbuf, len);
 xstrlcat(vers, ", inherit.\nFS: ", len); /* hack: "show" that we support type:=inherit */
 ops_showfstypes(tmpbuf, sizeof(tmpbuf));
 xstrlcat(vers, tmpbuf, len);

 /* append list of networks if available */
 if (wire_buf) {
   xstrlcat(vers, wire_buf, len);
   XFREE(wire_buf);
 }

 return vers;
}


static void
show_usage(void)
{
 fprintf(stderr,
         "Usage: %s [-nprvHS] [-a mount_point] [-c cache_time] [-d domain]\n\
\t[-k kernel_arch] [-l logfile%s\n\
\t[-t timeout.retrans] [-w wait_timeout] [-A arch] [-C cluster_name]\n\
\t[-o op_sys_ver] [-O op_sys_name]\n\
\t[-F conf_file] [-T conf_tag]", am_get_progname(),
#ifdef HAVE_SYSLOG
# ifdef LOG_DAEMON
         "|\"syslog[:facility]\"]"
# else /* not LOG_DAEMON */
         "|\"syslog\"]"
# endif /* not LOG_DAEMON */
#else /* not HAVE_SYSLOG */
         "]"
#endif /* not HAVE_SYSLOG */
         );

#ifdef HAVE_MAP_NIS
 fputs(" [-y nis-domain]\n", stderr);
#else /* not HAVE_MAP_NIS */
 fputc('\n', stderr);
#endif /* HAVE_MAP_NIS */

 show_opts('x', xlog_opt);
#ifdef DEBUG
 show_opts('D', dbg_opt);
#endif /* DEBUG */
 fprintf(stderr, "\t[directory mapname [-map_options]] ...\n");
}


void
get_args(int argc, char *argv[])
{
 int opt_ch, i;
 FILE *fp = stdin;
 char getopt_arguments[] = "+nprvSa:c:d:k:l:o:t:w:x:y:C:D:F:T:O:HA:";
 char *getopt_args;
 int print_version = 0;        /* 1 means we should print version info */

#ifdef HAVE_GNU_GETOPT
 getopt_args = getopt_arguments;
#else /* ! HAVE_GNU_GETOPT */
 getopt_args = &getopt_arguments[1];
#endif /* HAVE_GNU_GETOPT */

 /* if no arguments were passed, try to use /etc/amd.conf file */
 if (argc <= 1)
   use_conf_file = 1;

 while ((opt_ch = getopt(argc, argv, getopt_args)) != -1)
   switch (opt_ch) {

   case 'a':
     if (*optarg != '/') {
       fprintf(stderr, "%s: -a option must begin with a '/'\n",
               am_get_progname());
       exit(1);
     }
     gopt.auto_dir = optarg;
     break;

   case 'c':
     gopt.am_timeo = atoi(optarg);
     if (gopt.am_timeo <= 0)
       gopt.am_timeo = AM_TTL;
     break;

   case 'd':
     gopt.sub_domain = optarg;
     break;

   case 'k':
     gopt.karch = optarg;
     break;

   case 'l':
     gopt.logfile = optarg;
     break;

   case 'n':
     gopt.flags |= CFM_NORMALIZE_HOSTNAMES;
     break;

   case 'o':
     gopt.op_sys_ver = optarg;
     break;

   case 'p':
    gopt.flags |= CFM_PRINT_PID;
     break;

   case 'r':
     gopt.flags |= CFM_RESTART_EXISTING_MOUNTS;
     break;

   case 't':
     /* timeo.retrans (also affects toplvl mounts) */
     {
       char *dot = strchr(optarg, '.');
       int i;
       if (dot)
         *dot = '\0';
       if (*optarg) {
         for (i=0; i<AMU_TYPE_MAX; ++i)
           gopt.amfs_auto_timeo[i] = atoi(optarg);
       }
       if (dot) {
         for (i=0; i<AMU_TYPE_MAX; ++i)
           gopt.amfs_auto_retrans[i] = atoi(dot + 1);
         *dot = '.';
       }
     }
     break;

   case 'v':
     /*
      * defer to print version info after every variable had been
      * initialized.
      */
     print_version++;
     break;

   case 'w':
     gopt.am_timeo_w = atoi(optarg);
     if (gopt.am_timeo_w <= 0)
       gopt.am_timeo_w = AM_TTL_W;
     break;

   case 'x':
     usage += switch_option(optarg);
     break;

   case 'y':
#ifdef HAVE_MAP_NIS
     gopt.nis_domain = optarg;
#else /* not HAVE_MAP_NIS */
     plog(XLOG_USER, "-y: option ignored.  No NIS support available.");
#endif /* not HAVE_MAP_NIS */
     break;

   case 'A':
     gopt.arch = optarg;
     break;

   case 'C':
     gopt.cluster = optarg;
     break;

   case 'D':
#ifdef DEBUG
     usage += debug_option(optarg);
#else /* not DEBUG */
     fprintf(stderr, "%s: not compiled with DEBUG option -- sorry.\n",
             am_get_progname());
#endif /* not DEBUG */
     break;

   case 'F':
     amu_conf_file = optarg;
     use_conf_file = 1;
     break;

   case 'H':
     show_usage();
     exit(1);
     break;

   case 'O':
     gopt.op_sys = optarg;
     break;

   case 'S':
     gopt.flags &= ~CFM_PROCESS_LOCK; /* turn process locking off */
     break;

   case 'T':
     conf_tag = optarg;
     break;

   default:
     usage = 1;
     break;
   }

 /*
  * amd.conf file: if not command-line arguments were used, or if -F was
  * specified, then use that amd.conf file.  If the file cannot be opened,
  * abort amd.  If it can be found, open it, parse it, and then close it.
  */
 if (use_conf_file && amu_conf_file) {
   fp = fopen(amu_conf_file, "r");
   if (!fp) {
     char buf[128];
     xsnprintf(buf, sizeof(buf), "Amd configuration file (%s)",
               amu_conf_file);
     perror(buf);
     exit(1);
   }
   conf_in = fp;
   conf_parse();
   fclose(fp);
   if (process_all_regular_maps() != 0)
     exit(1);
 }

#ifdef DEBUG
 usage += switch_option("debug");
 /* initialize debug options */
 if (!debug_flags)
   debug_flags = D_CONTROL;    /* CONTROL = "daemon,amq,fork" */
#endif /* DEBUG */

 /* log information regarding amd.conf file */
 if (use_conf_file && amu_conf_file)
   plog(XLOG_INFO, "using configuration file %s", amu_conf_file);

#ifdef HAVE_MAP_LDAP
 /* ensure that if ldap_base is specified, that also ldap_hostports is */
 if (gopt.ldap_hostports && !gopt.ldap_base) {
   fprintf(stderr, "must specify both ldap_hostports and ldap_base\n");
   exit(1);
 }
#endif /* HAVE_MAP_LDAP */

 if (usage) {
   show_usage();
   exit(1);
 }

 while (optind <= argc - 2) {
   char *dir = argv[optind++];
   char *map = argv[optind++];
   char *opts = "";
   if (argv[optind] && *argv[optind] == '-')
     opts = &argv[optind++][1];

   root_newmap(dir, opts, map, NULL);
 }

 if (optind == argc) {
   /*
    * Append domain name to hostname.
    * sub_domain overrides hostdomain
    * if given.
    */
   if (gopt.sub_domain)
     hostdomain = gopt.sub_domain;
   if (*hostdomain == '.')
     hostdomain++;
   xstrlcat(hostd, ".", sizeof(hostd));
   xstrlcat(hostd, hostdomain, sizeof(hostd));

#ifdef MOUNT_TABLE_ON_FILE
   if (amuDebug(D_MTAB))
     if (gopt.debug_mtab_file)
       mnttab_file_name = gopt.debug_mtab_file; /* user supplied debug mtab path */
     else
       mnttab_file_name = DEBUG_MNTTAB_FILE; /* default debug mtab path */
   else
     mnttab_file_name = MNTTAB_FILE_NAME;
#else /* not MOUNT_TABLE_ON_FILE */
   if (amuDebug(D_MTAB))
     dlog("-D mtab option ignored");
# ifdef MNTTAB_FILE_NAME
   mnttab_file_name = MNTTAB_FILE_NAME;
# endif /* MNTTAB_FILE_NAME */
#endif /* not MOUNT_TABLE_ON_FILE */

   /*
    * If the kernel architecture was not specified
    * then use the machine architecture.
    */
   if (gopt.karch == NULL)
     gopt.karch = gopt.arch;

   if (gopt.cluster == NULL)
     gopt.cluster = hostdomain;

   /* sanity checking, normalize values just in case (toplvl too) */
   for (i=0; i<AMU_TYPE_MAX; ++i) {
     if (gopt.amfs_auto_timeo[i] == 0)
       gopt.amfs_auto_timeo[i] = AMFS_AUTO_TIMEO;
     if (gopt.amfs_auto_retrans[i] == 0)
       gopt.amfs_auto_retrans[i] = AMFS_AUTO_RETRANS(i);
     if (gopt.amfs_auto_retrans[i] == 0)
       gopt.amfs_auto_retrans[i] = 3;  /* under very unusual circumstances, could be zero */
   }
 }

 /* finally print version string and exit, if asked for */
 if (print_version) {
   fputs(get_version_string(), stderr);
   exit(0);
 }

 if (switch_to_logfile(gopt.logfile, orig_umask,
                       (gopt.flags & CFM_TRUNCATE_LOG)) != 0)
   plog(XLOG_USER, "Cannot switch logfile");

 return;
}

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