mount.cifs.c   [plain text]

/* 
   Mount helper utility for Linux CIFS VFS (virtual filesystem) client
   Copyright (C) 2003 Steve French  (sfrench@us.ibm.com)

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <pwd.h>
#include <sys/types.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <getopt.h>
#include <errno.h>
#include <netdb.h>
#include <string.h>
#include <mntent.h>
#include <fcntl.h>

#define MOUNT_CIFS_VERSION_MAJOR "1"
#define MOUNT_CIFS_VERSION_MINOR "5"

#ifndef MOUNT_CIFS_VENDOR_SUFFIX
#define MOUNT_CIFS_VENDOR_SUFFIX ""
#endif

#ifndef MS_MOVE 
#define MS_MOVE 8192 
#endif 

char * thisprogram;
int verboseflag = 0;
static int got_password = 0;
static int got_user = 0;
static int got_domain = 0;
static int got_ip = 0;
static int got_unc = 0;
static int got_uid = 0;
static int got_gid = 0;
static int free_share_name = 0;
static char * user_name = NULL;
char * mountpassword = NULL;


/* BB finish BB

        cifs_umount
        open nofollow - avoid symlink exposure? 
        get owner of dir see if matches self or if root
        call system(umount argv) etc.
                
BB end finish BB */

static void mount_cifs_usage(void)
{
	printf("\nUsage:  %s <remotetarget> <dir> -o <options>\n", thisprogram);
	printf("\nMount the remote target, specified as a UNC name,");
	printf(" to a local directory.\n\nOptions:\n");
	printf("\tuser=<arg>\n\tpass=<arg>\n\tdom=<arg>\n");
	printf("\nLess commonly used options:");
	printf("\n\tcredentials=<filename>,guest,perm,noperm,setuids,nosetuids,\n\trw,ro,sep=<char>,iocharset=<codepage>,suid,nosuid,exec,noexec");
	printf("\n\nOptions not needed for servers supporting CIFS Unix extensions (e.g. most Samba versions):");
	printf("\n\tuid=<uid>,gid=<gid>,dir_mode=<mode>,file_mode=<mode>");
	printf("\n\nRarely used options:");
	printf("\n\tport=<tcpport>,rsize=<size>,wsize=<size>,unc=<unc_name>,ip=<ip_address>,dev,nodev");
	printf("\n\nOptions are described in more detail in the manual page");
	printf("\n\tman 8 mount.cifs\n");
	printf("\nTo display the version number of the mount helper:");
	printf("\n\t%s -V\n",thisprogram);

	if(mountpassword) {
		memset(mountpassword,0,64);
		free(mountpassword);
	}
	exit(1);
}

/* caller frees username if necessary */
static char * getusername(void) {
	char *username = NULL;
	struct passwd *password = getpwuid(getuid());

	if (password) {
		username = password->pw_name;
	}
	return username;
}

char * parse_cifs_url(char * unc_name)
{
	printf("\nMounting cifs URL not implemented yet. Attempt to mount %s\n",unc_name);
	return NULL;
}

static int open_cred_file(char * file_name)
{
	char * line_buf;
	char * temp_val;
	FILE * fs;
	int i, length;
	fs = fopen(file_name,"r");
	if(fs == NULL)
		return errno;
	line_buf = malloc(4096);
	if(line_buf == NULL)
		return -ENOMEM;

	while(fgets(line_buf,4096,fs)) {
		/* parse line from credential file */

		/* eat leading white space */
		for(i=0;i<4086;i++) {
			if((line_buf[i] != ' ') && (line_buf[i] != '\t'))
				break;
			/* if whitespace - skip past it */
		}
		if (strncasecmp("username",line_buf+i,8) == 0) {
			temp_val = strchr(line_buf + i,'=');
			if(temp_val) {
				/* go past equals sign */
				temp_val++;
				for(length = 0;length<4087;length++) {
					if(temp_val[length] == '\n')
						break;
				}
				if(length > 4086) {
					printf("mount.cifs failed due to malformed username in credentials file");
					memset(line_buf,0,4096);
					if(mountpassword) {
						memset(mountpassword,0,64);
					}
					exit(1);
				} else {
					got_user = 1;
					user_name = calloc(1 + length,1);
					/* BB adding free of user_name string before exit,
						not really necessary but would be cleaner */
					strncpy(user_name,temp_val, length);
				}
			}
		} else if (strncasecmp("password",line_buf+i,8) == 0) {
			temp_val = strchr(line_buf+i,'=');
			if(temp_val) {
				/* go past equals sign */
				temp_val++;
				for(length = 0;length<65;length++) {
					if(temp_val[length] == '\n')
						break;
				}
				if(length > 64) {
					printf("mount.cifs failed: password in credentials file too long\n");
					memset(line_buf,0, 4096);
					if(mountpassword) {
						memset(mountpassword,0,64);
					}
					exit(1);
				} else {
					if(mountpassword == NULL) {
						mountpassword = calloc(65,1);
					} else
						memset(mountpassword,0,64);
					if(mountpassword) {
						/* BB add handling for commas in password here */
						strncpy(mountpassword,temp_val,length);
						got_password = 1;
					}
				}
			}
		}
	}
	fclose(fs);
	if(line_buf) {
		memset(line_buf,0,4096);
		free(line_buf);
	}
	return 0;
}

static int get_password_from_file(int file_descript, char * filename)
{
	int rc = 0;
	int i;
	char c;

	if(mountpassword == NULL)
		mountpassword = calloc(65,1);
	else 
		memset(mountpassword, 0, 64);

	if(filename != NULL) {
		file_descript = open(filename, O_RDONLY);
		if(file_descript < 0) {
			printf("mount.cifs failed. %s attempting to open password file %s\n",
				   strerror(errno),filename);
			exit(1);
		}
	}
	/* else file already open and fd provided */

	for(i=0;i<64;i++) {
		rc = read(file_descript,&c,1);
		if(rc < 0) {
			printf("mount.cifs failed. Error %s reading password file\n",strerror(errno));
			memset(mountpassword,0,64);
			if(filename != NULL)
				close(file_descript);
			exit(1);
		} else if(rc == 0) {
			if(mountpassword[0] == 0) {
				if(verboseflag)
					printf("\nWarning: null password used since cifs password file empty");
			}
			break;
		} else /* read valid character */ {
			if((c == 0) || (c == '\n')) {
				break;
			} else 
				mountpassword[i] = c;
		}
	}
	if((i == 64) && (verboseflag)) {
		printf("\nWarning: password longer than 64 characters specified in cifs password file");
	}
	got_password = 1;
	if(filename != NULL) {
		close(file_descript);
	}

	return rc;
}

static int parse_options(char * options, int * filesys_flags)
{
	char * data;
	char * percent_char = NULL;
	char * value = NULL;
	char * next_keyword = NULL;
	int rc = 0;

	if (!options)
		return 1;
	else
		data = options;

	if(verboseflag)
		printf("\n parsing options: %s", options);

/* while ((data = strsep(&options, ",")) != NULL) { */
	while(data != NULL) {
		/*  check if ends with trailing comma */
		if(*data == 0)
			break;

		/* format is keyword=value,keyword2=value2,keyword3=value3 etc.) */
		/* data  = next keyword */
		/* value = next value ie stuff after equal sign */

		next_keyword = strchr(data,',');
	
		/* temporarily null terminate end of keyword=value pair */
		if(next_keyword)
			*next_keyword = 0;

		/* if (!*data)
			continue; */
		
		/* temporarily null terminate keyword to make keyword and value distinct */
		if ((value = strchr(data, '=')) != NULL) {
			*value = '\0';
			value++;
		}

		if (strncmp(data, "user", 4) == 0) {
			if (!value || !*value) {
				if(data[4] == '\0') {
					if(verboseflag)
						printf("\nskipping empty user mount parameter\n");
					/* remove the parm since it would otherwise be confusing
					to the kernel code which would think it was a real username */
						data[0] = ',';
						data[1] = ',';
						data[2] = ',';
						data[3] = ',';
					/* BB remove it from mount line so as not to confuse kernel code */
				} else {
					printf("username specified with no parameter\n");
					return 1;	/* needs_arg; */
				}
			} else {
				if (strnlen(value, 260) < 260) {
					got_user=1;
					percent_char = strchr(value,'%');
					if(percent_char) {
						*percent_char = ',';
						if(mountpassword == NULL)
							mountpassword = calloc(65,1);
						if(mountpassword) {
							if(got_password)
								printf("\nmount.cifs warning - password specified twice\n");
							got_password = 1;
							percent_char++;
							strncpy(mountpassword, percent_char,64);
						/*  remove password from username */
							while(*percent_char != 0) {
								*percent_char = ',';
								percent_char++;
							}
						}
					}
				} else {
					printf("username too long\n");
					return 1;
				}
			}
		} else if (strncmp(data, "pass", 4) == 0) {
			if (!value || !*value) {
				if(got_password) {
					printf("\npassword specified twice, ignoring second\n");
				} else
					got_password = 1;
			} else if (strnlen(value, 17) < 17) {
				if(got_password)
					printf("\nmount.cifs warning - password specified twice\n");
				got_password = 1;
			} else {
				printf("password too long\n");
				return 1;
			}
		} else if (strncmp(data, "ip", 2) == 0) {
			if (!value || !*value) {
				printf("target ip address argument missing");
			} else if (strnlen(value, 35) < 35) {
				if(verboseflag)
					printf("ip address %s override specified\n",value);
				got_ip = 1;
			} else {
				printf("ip address too long\n");
				return 1;
			}
		} else if ((strncmp(data, "unc", 3) == 0)
		   || (strncmp(data, "target", 6) == 0)
		   || (strncmp(data, "path", 4) == 0)) {
			if (!value || !*value) {
				printf("invalid path to network resource\n");
				return 1;  /* needs_arg; */
			} else if(strnlen(value,5) < 5) {
				printf("UNC name too short");
			}

			if (strnlen(value, 300) < 300) {
				got_unc = 1;
				if (strncmp(value, "//", 2) == 0) {
					if(got_unc)
						printf("unc name specified twice, ignoring second\n");
					else
						got_unc = 1;
				} else if (strncmp(value, "\\\\", 2) != 0) {	                   
					printf("UNC Path does not begin with // or \\\\ \n");
					return 1;
				} else {
					if(got_unc)
						printf("unc name specified twice, ignoring second\n");
					else
						got_unc = 1;
				}
			} else {
				printf("CIFS: UNC name too long\n");
				return 1;
			}
		} else if ((strncmp(data, "domain", 3) == 0)
			   || (strncmp(data, "workgroup", 5) == 0)) {
			if (!value || !*value) {
				printf("CIFS: invalid domain name\n");
				return 1;	/* needs_arg; */
			}
			if (strnlen(value, 65) < 65) {
				got_domain = 1;
			} else {
				printf("domain name too long\n");
				return 1;
			}
		} else if (strncmp(data, "cred", 4) == 0) {
			if (value && *value) {
				rc = open_cred_file(value);
				if(rc) {
					printf("error %d opening credential file %s\n",rc, value);
					return 1;
				}
			} else {
				printf("invalid credential file name specified\n");
				return 1;
			}
		} else if (strncmp(data, "uid", 3) == 0) {
			if (value && *value) {
				got_uid = 1;
			}
		} else if (strncmp(data, "gid", 3) == 0) {
			if (value && *value) {
				got_gid = 1;
			}
       /* fmask and dmask synonyms for people used to smbfs syntax */
		} else if (strcmp(data, "file_mode") == 0 || strcmp(data, "fmask")==0) {
			if (!value || !*value) {
				printf ("Option '%s' requires a numerical argument\n", data);
				return 1;
			}

			if (value[0] != '0') {
				printf ("WARNING: '%s' not expressed in octal.\n", data);
			}

			if (strcmp (data, "fmask") == 0) {
				printf ("WARNING: CIFS mount option 'fmask' is deprecated. Use 'file_mode' instead.\n");
				data = "file_mode"; /* BB fix this */
			}
		} else if (strcmp(data, "dir_mode") == 0 || strcmp(data, "dmask")==0) {
			if (!value || !*value) {
				printf ("Option '%s' requires a numerical argument\n", data);
				return 1;
			}

			if (value[0] != '0') {
				printf ("WARNING: '%s' not expressed in octal.\n", data);
			}

			if (strcmp (data, "dmask") == 0) {
				printf ("WARNING: CIFS mount option 'dmask' is deprecated. Use 'dir_mode' instead.\n");
				data = "dir_mode";
			}
			/* the following eight mount options should be
			stripped out from what is passed into the kernel
			since these eight options are best passed as the
			mount flags rather than redundantly to the kernel 
			and could generate spurious warnings depending on the
			level of the corresponding cifs vfs kernel code */
		} else if (strncmp(data, "nosuid", 6) == 0) {
			*filesys_flags |= MS_NOSUID;
		} else if (strncmp(data, "suid", 4) == 0) {
			*filesys_flags &= ~MS_NOSUID;
		} else if (strncmp(data, "nodev", 5) == 0) {
			*filesys_flags |= MS_NODEV;
		} else if (strncmp(data, "dev", 3) == 0) {
			*filesys_flags &= ~MS_NODEV;
		} else if (strncmp(data, "noexec", 6) == 0) {
			*filesys_flags |= MS_NOEXEC;
		} else if (strncmp(data, "exec", 4) == 0) {
			*filesys_flags &= ~MS_NOEXEC;
		} else if (strncmp(data, "guest", 5) == 0) {
			got_password=1;
                        /* remove the parm since it would otherwise be logged by kern */
 			data[0] = ',';
                        data[1] = ',';
                        data[2] = ',';
 			data[3] = ',';
			data[4] = ',';
		} else if (strncmp(data, "ro", 2) == 0) {
			*filesys_flags |= MS_RDONLY;
		} else if (strncmp(data, "rw", 2) == 0) {
			*filesys_flags &= ~MS_RDONLY;
		} /* else if (strnicmp(data, "port", 4) == 0) {
			if (value && *value) {
				vol->port =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "rsize", 5) == 0) {
			if (value && *value) {
				vol->rsize =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "wsize", 5) == 0) {
			if (value && *value) {
				vol->wsize =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "version", 3) == 0) {
		} else {
			printf("CIFS: Unknown mount option %s\n",data);
		} */ /* nothing to do on those four mount options above.
			Just pass to kernel and ignore them here */

			/* move to next option */
		data = next_keyword+1;

		/* put overwritten equals sign back */
		if(value) {
			value--;
			*value = '=';
		}
	
		/* put previous overwritten comma back */
		if(next_keyword)
			*next_keyword = ',';
		else
			data = NULL;
	}
	return 0;
}

/* Note that caller frees the returned buffer if necessary */
char * parse_server(char ** punc_name)
{
	char * unc_name = *punc_name;
	int length = strnlen(unc_name,1024);
	char * share;
	char * ipaddress_string = NULL;
	struct hostent * host_entry;
	struct in_addr server_ipaddr;
	int rc;

	if(length > 1023) {
		printf("mount error: UNC name too long");
		return NULL;
	}
	if (strncasecmp("cifs://",unc_name,7) == 0)
		return parse_cifs_url(unc_name+7);
	if (strncasecmp("smb://",unc_name,6) == 0) {
		return parse_cifs_url(unc_name+6);
	}

	if(length < 3) {
		/* BB add code to find DFS root here */
		printf("\nMounting the DFS root for domain not implemented yet");
		return NULL;
	} else {
		if(strncmp(unc_name,"//",2) && strncmp(unc_name,"\\\\",2)) {
			/* check for nfs syntax ie server:share */
			share = strchr(unc_name,':');
			if(share) {
				free_share_name = 1;
				*punc_name = malloc(length+3);
				*share = '/';
				strncpy((*punc_name)+2,unc_name,length);
				unc_name = *punc_name;
				unc_name[length+2] = 0;
				goto continue_unc_parsing;
			} else {
				printf("mount error: improperly formatted UNC name.");
				printf(" %s does not begin with \\\\ or //\n",unc_name);
				return NULL;
			}
		} else {
continue_unc_parsing:
			unc_name[0] = '/';
			unc_name[1] = '/';
			unc_name += 2;
			if ((share = strchr(unc_name, '/')) || 
				(share = strchr(unc_name,'\\'))) {
				*share = 0;  /* temporarily terminate the string */
				share += 1;
				if(got_ip == 0) {
					host_entry = gethostbyname(unc_name);
				}
				*(share - 1) = '/'; /* put the slash back */
				if(got_ip) {
					if(verboseflag)
						printf("ip address specified explicitly\n");
					return NULL;
				}
				if(host_entry == NULL) {
					printf("mount error: could not find target server. TCP name %s not found ", unc_name);
					printf(" rc = %d\n",rc);
					return NULL;
				} else {
					/* BB should we pass an alternate version of the share name as Unicode */
					/* BB what about ipv6? BB */
					/* BB add retries with alternate servers in list */

					memcpy(&server_ipaddr.s_addr, host_entry->h_addr, 4);

					ipaddress_string = inet_ntoa(server_ipaddr);                                                                                     
					if(ipaddress_string == NULL) {
						printf("mount error: could not get valid ip address for target server\n");
						return NULL;
					}
					return ipaddress_string; 
				}
			} else {
				/* BB add code to find DFS root (send null path on get DFS Referral to specified server here */
				printf("Mounting the DFS root for a particular server not implemented yet\n");
				return NULL;
			}
		}
	}
}

static struct option longopts[] = {
	{ "all", 0, NULL, 'a' },
	{ "help",0, NULL, 'h' },
	{ "move",0, NULL, 'm' },
	{ "bind",0, NULL, 'b' },
	{ "read-only", 0, NULL, 'r' },
	{ "ro", 0, NULL, 'r' },
	{ "verbose", 0, NULL, 'v' },
	{ "version", 0, NULL, 'V' },
	{ "read-write", 0, NULL, 'w' },
	{ "rw", 0, NULL, 'w' },
	{ "options", 1, NULL, 'o' },
	{ "type", 1, NULL, 't' },
	{ "rsize",1, NULL, 'R' },
	{ "wsize",1, NULL, 'W' },
	{ "uid", 1, NULL, '1'},
	{ "gid", 1, NULL, '2'},
	{ "user",1,NULL,'u'},
	{ "username",1,NULL,'u'},
	{ "dom",1,NULL,'d'},
	{ "domain",1,NULL,'d'},
	{ "password",1,NULL,'p'},
	{ "pass",1,NULL,'p'},
	{ "credentials",1,NULL,'c'},
	{ "port",1,NULL,'P'},
	/* { "uuid",1,NULL,'U'}, */ /* BB unimplemented */
	{ NULL, 0, NULL, 0 }
};

int main(int argc, char ** argv)
{
	int c;
	int flags = MS_MANDLOCK; /* no need to set legacy MS_MGC_VAL */
	char * orgoptions = NULL;
	char * share_name = NULL;
	char * domain_name = NULL;
	char * ipaddr = NULL;
	char * uuid = NULL;
	char * mountpoint;
	char * options;
	char * resolved_path;
	char * temp;
	int rc;
	int rsize = 0;
	int wsize = 0;
	int nomtab = 0;
	int uid = 0;
	int gid = 0;
	int optlen = 0;
	int orgoptlen = 0;
	struct stat statbuf;
	struct utsname sysinfo;
	struct mntent mountent;
	FILE * pmntfile;

	/* setlocale(LC_ALL, "");
	bindtextdomain(PACKAGE, LOCALEDIR);
	textdomain(PACKAGE); */

	if(argc && argv) {
		thisprogram = argv[0];
	}
	if(thisprogram == NULL)
		thisprogram = "mount.cifs";

	uname(&sysinfo);
	/* BB add workstation name and domain and pass down */

/* #ifdef _GNU_SOURCE
	printf(" node: %s machine: %s sysname %s domain %s\n", sysinfo.nodename,sysinfo.machine,sysinfo.sysname,sysinfo.domainname);
#endif */

	share_name = argv[1];
	mountpoint = argv[2];

	/* add sharename in opts string as unc= parm */

	while ((c = getopt_long (argc, argv, "afFhilL:no:O:rsSU:vVwt:",
			 longopts, NULL)) != -1) {
		switch (c) {
/* No code to do the following  options yet */
/*	case 'l':
		list_with_volumelabel = 1;
		break;
	case 'L':
		volumelabel = optarg;
		break; */
/*	case 'a':	       
		++mount_all;
		break; */

		case '?':
		case 'h':	 /* help */
			mount_cifs_usage ();
			exit(1);
		case 'n':
		    ++nomtab;
		    break;
		case 'b':
			flags |= MS_BIND;
			break;
		case 'm':
			flags |= MS_MOVE;
			break;
		case 'o':
			orgoptions = strdup(optarg);
		    break;
		case 'r':  /* mount readonly */
			flags |= MS_RDONLY;
			break;
		case 'U':
			uuid = optarg;
			break;
		case 'v':
			++verboseflag;
			break;
		case 'V':	   
			printf ("mount.cifs version: %s.%s%s\n",
			MOUNT_CIFS_VERSION_MAJOR,
			MOUNT_CIFS_VERSION_MINOR,
			MOUNT_CIFS_VENDOR_SUFFIX);
			if(mountpassword) {
				memset(mountpassword,0,64);
			}
			exit (0);
		case 'w':
			flags &= ~MS_RDONLY;
			break;
		case 'R':
			rsize = atoi(optarg) ;
			break;
		case 'W':
			wsize = atoi(optarg);
			break;
		case '1':
			uid = atoi(optarg);
			break;
		case '2':
			gid = atoi(optarg);
			break;
		case 'u':
			got_user = 1;
			user_name = optarg;
			break;
		case 'd':
			domain_name = optarg;
			break;
		case 'p':
			if(mountpassword == NULL)
				mountpassword = calloc(65,1);
			if(mountpassword) {
				got_password = 1;
				strncpy(mountpassword,optarg,64);
			}
			break;
		case 'S':
			get_password_from_file(0 /* stdin */,NULL);
			break;
		case 't':
			break;
		default:
			printf("unknown mount option %c\n",c);
			mount_cifs_usage();
			exit(1);
		}
	}

	if(argc < 3)
		mount_cifs_usage();

	if (getenv("PASSWD")) {
		if(mountpassword == NULL)
			mountpassword = calloc(65,1);
		if(mountpassword) {
			strncpy(mountpassword,getenv("PASSWD"),64);
			got_password = 1;
		}
	} else if (getenv("PASSWD_FD")) {
		get_password_from_file(atoi(getenv("PASSWD_FD")),NULL);
	} else if (getenv("PASSWD_FILE")) {
		get_password_from_file(0, getenv("PASSWD_FILE"));
	}

        if (orgoptions && parse_options(orgoptions, &flags))
                return -1;
	
	ipaddr = parse_server(&share_name);
	if((ipaddr == NULL) && (got_ip == 0)) {
		printf("No ip address specified and hostname not found\n");
		return -1;
	}
	

	/* BB save off path and pop after mount returns? */
	resolved_path = malloc(PATH_MAX+1);
	if(resolved_path) {
		/* Note that if we can not canonicalize the name, we get
		another chance to see if it is valid when we chdir to it */
		if (realpath(mountpoint, resolved_path)) {
			mountpoint = resolved_path; 
		}
	}
	if(chdir(mountpoint)) {
		printf("mount error: can not change directory into mount target %s\n",mountpoint);
		return -1;
	}

	if(stat (".", &statbuf)) {
		printf("mount error: mount point %s does not exist\n",mountpoint);
		return -1;
	}

	if (S_ISDIR(statbuf.st_mode) == 0) {
		printf("mount error: mount point %s is not a directory\n",mountpoint);
		return -1;
	}

	if((getuid() != 0) && (geteuid() == 0)) {
		if((statbuf.st_uid == getuid()) && (S_IRWXU == (statbuf.st_mode & S_IRWXU))) {
#ifndef CIFS_ALLOW_USR_SUID
			/* Do not allow user mounts to control suid flag
			for mount unless explicitly built that way */
			flags |= MS_NOSUID | MS_NODEV;
#endif						
		} else {
			printf("mount error: permission denied or not superuser and mount.cifs not installed SUID\n"); 
			return -1;
		}
	}

	if(got_user == 0)
		user_name = getusername();
       
	if(got_password == 0) {
		mountpassword = getpass("Password: "); /* BB obsolete */
		got_password = 1;
	}
	/* FIXME launch daemon (handles dfs name resolution and credential change) 
	   remember to clear parms and overwrite password field before launching */
	if(orgoptions) {
		optlen = strlen(orgoptions);
		orgoptlen = optlen;
	} else
		optlen = 0;
	if(share_name)
		optlen += strlen(share_name) + 4;
	if(user_name)
		optlen += strlen(user_name) + 6;
	if(ipaddr)
		optlen += strlen(ipaddr) + 4;
	if(mountpassword)
		optlen += strlen(mountpassword) + 6;
	options = malloc(optlen + 10);

	if(options == NULL) {
		printf("Could not allocate memory for mount options\n");
		return -1;
	}
		

	options[0] = 0;
	strncat(options,"unc=",4);
	strcat(options,share_name);
	/* scan backwards and reverse direction of slash */
	temp = strrchr(options, '/');
	if(temp > options + 6)
		*temp = '\\';
	if(ipaddr) {
		strncat(options,",ip=",4);
		strcat(options,ipaddr);
	} 
	if(user_name) {
		strncat(options,",user=",6);
		strcat(options,user_name);
	} 
	if(mountpassword) {
		strncat(options,",pass=",6);
		strcat(options,mountpassword);
	}
	strncat(options,",ver=",5);
	strcat(options,MOUNT_CIFS_VERSION_MAJOR);

	if(orgoptions) {
		strcat(options,",");
		strcat(options,orgoptions);
	}
	if(verboseflag)
		printf("\nmount.cifs kernel mount options %s \n",options);
	if(mount(share_name, mountpoint, "cifs", flags, options)) {
	/* remember to kill daemon on error */
		switch (errno) {
		case 0:
			printf("mount failed but no error number set\n");
			break;
		case ENODEV:
			printf("mount error: cifs filesystem not supported by the system\n");
			break;
		default:
			printf("mount error %d = %s\n",errno,strerror(errno));
		}
		printf("Refer to the mount.cifs(8) manual page (e.g.man mount.cifs)\n");
		if(mountpassword) {
			memset(mountpassword,0,64);
		}
		return -1;
	} else {
		pmntfile = setmntent(MOUNTED, "a+");
		if(pmntfile) {
			mountent.mnt_fsname = share_name;
			mountent.mnt_dir = mountpoint; 
			mountent.mnt_type = "cifs"; 
			mountent.mnt_opts = malloc(220);
			if(mountent.mnt_opts) {
				char * mount_user = getusername();
				memset(mountent.mnt_opts,0,200);
				if(flags & MS_RDONLY)
					strcat(mountent.mnt_opts,"ro");
				else
					strcat(mountent.mnt_opts,"rw");
				if(flags & MS_MANDLOCK)
					strcat(mountent.mnt_opts,",mand");
				else
					strcat(mountent.mnt_opts,",nomand");
				if(flags & MS_NOEXEC)
					strcat(mountent.mnt_opts,",noexec");
				if(flags & MS_NOSUID)
					strcat(mountent.mnt_opts,",nosuid");
				if(flags & MS_NODEV)
					strcat(mountent.mnt_opts,",nodev");
				if(flags & MS_SYNCHRONOUS)
					strcat(mountent.mnt_opts,",synch");
				if(mount_user) {
					if(getuid() != 0) {
						strcat(mountent.mnt_opts,",user=");
						strcat(mountent.mnt_opts,mount_user);
					}
					free(mount_user);
				}
			}
			mountent.mnt_freq = 0;
			mountent.mnt_passno = 0;
			rc = addmntent(pmntfile,&mountent);
			endmntent(pmntfile);
			if(mountent.mnt_opts)
				free(mountent.mnt_opts);
		} else {
		    printf("could not update mount table\n");
		}
	}
	if(mountpassword) {
		memset(mountpassword,0,64);
		free(mountpassword);
	}

	if(options) {
		memset(options,0,optlen);
		free(options);
	}

	if(orgoptions) {
		memset(orgoptions,0,orgoptlen);
		free(orgoptions);
	}
	if(resolved_path) {
		free(resolved_path);
	}

	if(free_share_name) {
		free(share_name);
		}
	return 0;
}