diff options
Diffstat (limited to 'source/client/mount.cifs.c')
| -rwxr-xr-x | source/client/mount.cifs.c | 825 |
1 files changed, 825 insertions, 0 deletions
diff --git a/source/client/mount.cifs.c b/source/client/mount.cifs.c new file mode 100755 index 00000000000..8c23cc22123 --- /dev/null +++ b/source/client/mount.cifs.c @@ -0,0 +1,825 @@ +/* + 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 "0" + +#ifndef MOUNT_CIFS_VENDOR_SUFFIX +#define MOUNT_CIFS_VENDOR_SUFFIX "" +#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 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"); + 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("\ncifs url %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<4096;i++) { + if(line_buf[i] == '\0') + break; + else if((line_buf[i] != ' ') && (line_buf[i] != '\t')) + break; + line_buf++; + } + + if (strncasecmp("username",line_buf,8) == 0) { + temp_val = strchr(line_buf + i,'='); + if(temp_val) { + /* go past equals sign */ + temp_val++; + length = strlen(temp_val); + if(length > 4086) { + printf("cifs.mount 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,8) == 0) { + temp_val = strchr(line_buf+i,'='); + if(temp_val) { + /* go past equals sign */ + temp_val++; + length = strlen(temp_val); + if(length > 64) { + printf("cifs.mount 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); + } + if(mountpassword) { + strncpy(mountpassword,temp_val,64); + 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("cifs.mount 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("cifs.mount 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) +{ + char * data; + char * percent_char = 0; + char * value = 0; + char * next_keyword = 0; + 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) { + printf("invalid or missing username\n"); + return 1; /* needs_arg; */ + } + 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("\ncifs.mount 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("\ncifs.mount 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) { + 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",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"; + } + } 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"; + } + } /* 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 if (strnicmp(data, "rw", 2) == 0) { + + } else + printf("CIFS: Unknown mount option %s\n",data); */ + + /* 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 = 0; + + } + return 0; +} + +/* Note that caller frees the returned buffer if necessary */ +char * parse_server(char * unc_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 0; + } + 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 0; + } else { + if(strncmp(unc_name,"//",2) && strncmp(unc_name,"\\\\",2)) { + printf("mount error: improperly formatted UNC name."); + printf(" %s does not begin with \\\\ or //\n",unc_name); + return 0; + } else { + unc_name[0] = '\\'; + 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; + host_entry = gethostbyname(unc_name); + *(share - 1) = '/'; /* put the slash back */ +/* rc = getipnodebyname(unc_name, AF_INET, AT_ADDRCONFIG ,&rc);*/ + 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 0; + } + 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 0; + } + 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 0; + } + } + } +} + +static struct option longopts[] = { + { "all", 0, 0, 'a' }, + { "help", 0, 0, 'h' }, + { "read-only", 0, 0, 'r' }, + { "ro", 0, 0, 'r' }, + { "verbose", 0, 0, 'v' }, + { "version", 0, 0, 'V' }, + { "read-write", 0, 0, 'w' }, + { "rw", 0, 0, 'w' }, + { "options", 1, 0, 'o' }, + { "types", 1, 0, 't' }, + { "rsize",1, 0, 'R' }, + { "wsize",1, 0, 'W' }, + { "uid", 1, 0, '1'}, + { "gid", 1, 0, '2'}, + { "uuid",1,0,'U' }, + { "user",1,0,'u'}, + { "username",1,0,'u'}, + { "dom",1,0,'d'}, + { "domain",1,0,'d'}, + { "password",1,0,'p'}, + { "pass",1,0,'p'}, + { "credentials",1,0,'c'}, + { "port",1,0,'P'}, + { NULL, 0, 0, 0 } +}; + +int main(int argc, char ** argv) +{ + int c; + int flags = MS_MANDLOCK | 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 * 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:rsU: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 '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 '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")); + } + + ipaddr = parse_server(share_name); + + if (orgoptions && parse_options(orgoptions)) + return 1; + + /* BB save off path and pop after mount returns? */ + /* BB canonicalize the path in argv[1]? */ + + if(chdir(mountpoint)) { + printf("mount error: can not change directory into mount target %s\n",mountpoint); + } + + if(stat (mountpoint, &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))) { + printf("setuid mount allowed\n"); + } else { + printf("mount error: permission denied or not superuser and cifs.mount 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); + + 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("\ncifs.mount 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 = ""; + mountent.mnt_freq = 0; + mountent.mnt_passno = 0; + rc = addmntent(pmntfile,&mountent); + endmntent(pmntfile); + } 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); + } + return 0; +} + |