Attachment 1051 Details for Bug 993 – updated cifs mount helper

updated cifs mount helper

mount.cifs.c (text/x-csrc), 28.85 KB, created by Steve French on 2005-03-18 23:08:08 UTC

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Creator: Steve French

Created: 2005-03-18 23:08:08 UTC

Size: 28.85 KB

patch

obsolete

>/* 
>   Mount helper utility for Linux CIFS VFS (virtual filesystem) client
>   Copyright (C) 2003,2005 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 <ctype.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 "7"
>
>#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;
>static char * mountpassword = NULL;
>char * domain_name = 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 char * check_for_domain(char **);
>
>
>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,directio");
>	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;
>}
>
>static 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("parsing options: %s\n", options);
>
>	/* BB fixme check for separator override BB */
>
>/* 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,','); /* BB handle sep= */
>	
>		/* temporarily null terminate end of keyword=value pair */
>		if(next_keyword)
>			*next_keyword = 0;
>
>		/* temporarily null terminate keyword to make keyword and value distinct */
>		if ((value = strchr(data, '=')) != NULL) {
>			*value = '\0';
>			value++;
>		}
>
>		if (strncmp(data, "users",5) == 0) {
>			if(!value || !*value) {
>				strncpy(data,",,,,,",5);
>			}
>		} else if (strncmp(data, "user_xattr",10) == 0) {
>		   /* do nothing - need to skip so not parsed as user name */
>		} else 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] = ',';
>				} 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++;
>							}
>						}
>					}
>					/* this is only case in which the user
>					name buf is not malloc - so we have to
>					check for domain name embedded within
>					the user name here since the later
>					call to check_for_domain will not be
>					invoked */
>					domain_name = check_for_domain(&value);
>				} 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 = ','; /* BB handle sep= */
>		else
>			data = NULL;
>	}
>	return 0;
>}
>
>/* replace all (one or more) commas with double commas */
>static void check_for_comma(char ** ppasswrd)
>{
>	char *new_pass_buf;
>	char *pass;
>	int i,j;
>	int number_of_commas = 0;
>	int len = strlen(*ppasswrd);
>
>	if(ppasswrd == NULL)
>		return;
>	else 
>		(pass = *ppasswrd);
>
>	for(i=0;i<len;i++)  {
>		if(pass[i] == ',')
>			number_of_commas++;
>	}
>
>	if(number_of_commas == 0)
>		return;
>	if(number_of_commas > 64) {
>		/* would otherwise overflow the mount options buffer */
>		printf("\nInvalid password. Password contains too many commas.\n");
>		return;
>	}
>
>	new_pass_buf = malloc(len+number_of_commas+1);
>	if(new_pass_buf == NULL)
>		return;
>
>	for(i=0,j=0;i<len;i++,j++) {
>		new_pass_buf[j] = pass[i];
>		if(pass[i] == ',') {
>			j++;
>			new_pass_buf[j] = pass[i];
>		}
>	}
>	new_pass_buf[len+number_of_commas] = 0;
>
>	free(*ppasswrd);
>	*ppasswrd = new_pass_buf;
>	
>	return;
>}
>
>/* Usernames can not have backslash in them and we use
>   [BB check if usernames can have forward slash in them BB] 
>   backslash as domain\user separator character
>*/
>static char * check_for_domain(char **ppuser)
>{
>	char * original_string;
>	char * usernm;
>	char * domainnm;
>	int    original_len;
>	int    len;
>	int    i;
>
>	if(ppuser == NULL)
>		return NULL;
>
>	original_string = *ppuser;
>
>	if (original_string == NULL)
>		return NULL;
>	
>	original_len = strlen(original_string);
>
>	usernm = strchr(*ppuser,'/');
>	if (usernm == NULL) {
>		usernm = strchr(*ppuser,'\\');
>		if (usernm == NULL)
>			return NULL;
>	}
>
>	if(got_domain) {
>		printf("Domain name specified twice. Username probably malformed\n");
>		return NULL;
>	}
>
>	usernm[0] = 0;
>	domainnm = *ppuser;
>	if (domainnm[0] != 0) {
>		got_domain = 1;
>	} else {
>		printf("null domain\n");
>	}
>	len = strlen(domainnm);
>	/* reset domainm to new buffer, and copy
>	domain name into it */
>	domainnm = malloc(len+1);
>	if(domainnm == NULL)
>		return NULL;
>
>	strcpy(domainnm,*ppuser);
>
>/*	move_string(*ppuser, usernm+1) */
>	len = strlen(usernm+1);
>
>	if(len >= original_len) {
>		/* should not happen */
>		return domainnm;
>	}
>
>	for(i=0;i<original_len;i++) {
>		if(i<len)
>			original_string[i] = usernm[i+1];
>		else /* stuff with commas to remove last parm */
>			original_string[i] = ',';
>	}
>
>	/* BB add check for more than one slash? 
>	  strchr(*ppuser,'/');
>	  strchr(*ppuser,'\\') 
>	*/
>	
>	return domainnm;
>}
>
>/* Note that caller frees the returned buffer if necessary */
>static 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 * 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;
>	int retry = 0; /* set when we have to retry mount with uppercase */
>	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; /* BB fix this - currently ignored */
>			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();
>		got_user = 1;
>	}
>       
>	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 */
>mount_retry:
>	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 + 64 /* space for commas in password */ + 8 /* space for domain=  , domain name itself was counted as part of the length username string above */);
>
>	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) {
>		/* check for syntax like user=domain\user */
>		domain_name = check_for_domain(&user_name);
>		strncat(options,",user=",6);
>		strcat(options,user_name);
>	}
>	if(retry == 0) {
>		if(domain_name) { 
>			/* extra length accounted for in option string above */
>			strncat(options,",domain=",8);
>			strcat(options,domain_name);
>		}
>	}
>	if(mountpassword) {
>		/* Commas have to be doubled, or else they will
>		look like the parameter separator */
>/*		if(sep is not set)*/
>		if(retry == 0)
>			check_for_comma(&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 */
>		char * tmp;
>
>		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;
>		case ENXIO:
>			if(retry == 0) {
>				retry = 1;
>				tmp = share_name;
>				while (*tmp && !(((unsigned char)tmp[0]) & 0x80)) {
>					*tmp = toupper((unsigned char)*tmp);
>		        		tmp++;
>				}
>				if(!*tmp) {
>					printf("retrying with upper case share name\n");
>					goto mount_retry;
>				}
>			}
>		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) {
>		int len = strlen(mountpassword);
>		memset(mountpassword,0,len);
>		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;
>}
>

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