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Diffstat (limited to '')
| -rw-r--r-- | source3/lib/util.c | 2096 |
1 files changed, 2096 insertions, 0 deletions
diff --git a/source3/lib/util.c b/source3/lib/util.c new file mode 100644 index 0000000..919dbcf --- /dev/null +++ b/source3/lib/util.c @@ -0,0 +1,2096 @@ +/* + Unix SMB/CIFS implementation. + Samba utility functions + Copyright (C) Andrew Tridgell 1992-1998 + Copyright (C) Jeremy Allison 2001-2007 + Copyright (C) Simo Sorce 2001 + Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003 + Copyright (C) James Peach 2006 + + 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 3 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, see <http://www.gnu.org/licenses/>. +*/ + +/** + * @brief Small functions that don't fit anywhere else + * @file util.c + */ + +#include "includes.h" +#include "system/passwd.h" +#include "system/filesys.h" +#include "lib/util/server_id.h" +#include "util_tdb.h" +#include "ctdbd_conn.h" +#include "../lib/util/util_pw.h" +#include "messages.h" +#include "lib/messaging/messages_dgm.h" +#include "libcli/security/security.h" +#include "serverid.h" +#include "lib/util/sys_rw.h" +#include "lib/util/sys_rw_data.h" +#include "lib/util/util_process.h" +#include "lib/dbwrap/dbwrap_ctdb.h" +#include "lib/gencache.h" +#include "lib/util/string_wrappers.h" + +#ifdef HAVE_SYS_PRCTL_H +#include <sys/prctl.h> +#endif + +/* Max allowable allococation - 256mb - 0x10000000 */ +#define MAX_ALLOC_SIZE (1024*1024*256) + +static enum protocol_types Protocol = PROTOCOL_COREPLUS; + +enum protocol_types get_Protocol(void) +{ + return Protocol; +} + +void set_Protocol(enum protocol_types p) +{ + Protocol = p; +} + +static enum remote_arch_types ra_type = RA_UNKNOWN; + +void gfree_all( void ) +{ + gfree_loadparm(); + gfree_charcnv(); + gfree_interfaces(); + gfree_debugsyms(); +} + +/******************************************************************* + Check if a file exists - call vfs_file_exist for samba files. +********************************************************************/ + +bool file_exist_stat(const char *fname,SMB_STRUCT_STAT *sbuf, + bool fake_dir_create_times) +{ + SMB_STRUCT_STAT st; + if (!sbuf) + sbuf = &st; + + if (sys_stat(fname, sbuf, fake_dir_create_times) != 0) + return(False); + + return((S_ISREG(sbuf->st_ex_mode)) || (S_ISFIFO(sbuf->st_ex_mode))); +} + +/******************************************************************* + Check if a unix domain socket exists - call vfs_file_exist for samba files. +********************************************************************/ + +bool socket_exist(const char *fname) +{ + SMB_STRUCT_STAT st; + if (sys_stat(fname, &st, false) != 0) + return(False); + + return S_ISSOCK(st.st_ex_mode); +} + +/******************************************************************* + Returns the size in bytes of the named given the stat struct. +********************************************************************/ + +uint64_t get_file_size_stat(const SMB_STRUCT_STAT *sbuf) +{ + return sbuf->st_ex_size; +} + +/**************************************************************************** + Check two stats have identical dev and ino fields. +****************************************************************************/ + +bool check_same_dev_ino(const SMB_STRUCT_STAT *sbuf1, + const SMB_STRUCT_STAT *sbuf2) +{ + if (sbuf1->st_ex_dev != sbuf2->st_ex_dev || + sbuf1->st_ex_ino != sbuf2->st_ex_ino) { + return false; + } + return true; +} + +/**************************************************************************** + Check if a stat struct is identical for use. +****************************************************************************/ + +bool check_same_stat(const SMB_STRUCT_STAT *sbuf1, + const SMB_STRUCT_STAT *sbuf2) +{ + if (sbuf1->st_ex_uid != sbuf2->st_ex_uid || + sbuf1->st_ex_gid != sbuf2->st_ex_gid || + !check_same_dev_ino(sbuf1, sbuf2)) { + return false; + } + return true; +} + +/******************************************************************* + Show a smb message structure. +********************************************************************/ + +void show_msg(const char *buf) +{ + int i; + int bcc=0; + + if (!DEBUGLVL(5)) + return; + + DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n", + smb_len(buf), + (int)CVAL(buf,smb_com), + (int)CVAL(buf,smb_rcls), + (int)CVAL(buf,smb_reh), + (int)SVAL(buf,smb_err), + (int)CVAL(buf,smb_flg), + (int)SVAL(buf,smb_flg2))); + DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n", + (int)SVAL(buf,smb_tid), + (int)SVAL(buf,smb_pid), + (int)SVAL(buf,smb_uid), + (int)SVAL(buf,smb_mid))); + DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct))); + + for (i=0;i<(int)CVAL(buf,smb_wct);i++) + DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i, + SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i))); + + bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct))); + + DEBUGADD(5,("smb_bcc=%d\n",bcc)); + + if (DEBUGLEVEL < 10) + return; + + if (DEBUGLEVEL < 50) + bcc = MIN(bcc, 512); + + dump_data(10, (const uint8_t *)smb_buf_const(buf), bcc); +} + +/******************************************************************* + Setup only the byte count for a smb message. +********************************************************************/ + +int set_message_bcc(char *buf,int num_bytes) +{ + int num_words = CVAL(buf,smb_wct); + SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes); + _smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4); + return (smb_size + num_words*2 + num_bytes); +} + +/******************************************************************* + Add a data blob to the end of a smb_buf, adjusting bcc and smb_len. + Return the bytes added +********************************************************************/ + +ssize_t message_push_blob(uint8_t **outbuf, DATA_BLOB blob) +{ + size_t newlen = smb_len(*outbuf) + 4 + blob.length; + uint8_t *tmp; + + if (!(tmp = talloc_realloc(NULL, *outbuf, uint8_t, newlen))) { + DEBUG(0, ("talloc failed\n")); + return -1; + } + *outbuf = tmp; + + memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length); + set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length); + return blob.length; +} + +/******************************************************************* + Reduce a file name, removing .. elements. +********************************************************************/ + +static char *dos_clean_name(TALLOC_CTX *ctx, const char *s) +{ + char *p = NULL; + char *str = NULL; + + DEBUG(3,("dos_clean_name [%s]\n",s)); + + /* remove any double slashes */ + str = talloc_all_string_sub(ctx, s, "\\\\", "\\"); + if (!str) { + return NULL; + } + + /* Remove leading .\\ characters */ + if(strncmp(str, ".\\", 2) == 0) { + trim_string(str, ".\\", NULL); + if(*str == 0) { + str = talloc_strdup(ctx, ".\\"); + if (!str) { + return NULL; + } + } + } + + while ((p = strstr_m(str,"\\..\\")) != NULL) { + char *s1; + + *p = 0; + s1 = p+3; + + if ((p=strrchr_m(str,'\\')) != NULL) { + *p = 0; + } else { + *str = 0; + } + str = talloc_asprintf(ctx, + "%s%s", + str, + s1); + if (!str) { + return NULL; + } + } + + trim_string(str,NULL,"\\.."); + return talloc_all_string_sub(ctx, str, "\\.\\", "\\"); +} + +/******************************************************************* + Reduce a file name, removing .. elements. +********************************************************************/ + +char *unix_clean_name(TALLOC_CTX *ctx, const char *s) +{ + char *p = NULL; + char *str = NULL; + + DEBUG(3,("unix_clean_name [%s]\n",s)); + + /* remove any double slashes */ + str = talloc_all_string_sub(ctx, s, "//","/"); + if (!str) { + return NULL; + } + + /* Remove leading ./ characters */ + if(strncmp(str, "./", 2) == 0) { + trim_string(str, "./", NULL); + if(*str == 0) { + str = talloc_strdup(ctx, "./"); + if (!str) { + return NULL; + } + } + } + + while ((p = strstr_m(str,"/../")) != NULL) { + char *s1; + + *p = 0; + s1 = p+3; + + if ((p=strrchr_m(str,'/')) != NULL) { + *p = 0; + } else { + *str = 0; + } + str = talloc_asprintf(ctx, + "%s%s", + str, + s1); + if (!str) { + return NULL; + } + } + + trim_string(str,NULL,"/.."); + return talloc_all_string_sub(ctx, str, "/./", "/"); +} + +char *clean_name(TALLOC_CTX *ctx, const char *s) +{ + char *str = dos_clean_name(ctx, s); + if (!str) { + return NULL; + } + return unix_clean_name(ctx, str); +} + +/******************************************************************* + Write data into an fd at a given offset. Ignore seek errors. +********************************************************************/ + +ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, off_t pos) +{ + size_t total=0; + ssize_t ret; + + if (pos == (off_t)-1) { + return write_data(fd, buffer, N); + } +#if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64) + while (total < N) { + ret = sys_pwrite(fd,buffer + total,N - total, pos); + if (ret == -1 && errno == ESPIPE) { + return write_data(fd, buffer + total,N - total); + } + if (ret == -1) { + DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) )); + return -1; + } + if (ret == 0) { + return total; + } + total += ret; + pos += ret; + } + return (ssize_t)total; +#else + /* Use lseek and write_data. */ + if (lseek(fd, pos, SEEK_SET) == -1) { + if (errno != ESPIPE) { + return -1; + } + } + return write_data(fd, buffer, N); +#endif +} + +static int reinit_after_fork_pipe[2] = { -1, -1 }; + +NTSTATUS init_before_fork(void) +{ + int ret; + + ret = pipe(reinit_after_fork_pipe); + if (ret == -1) { + NTSTATUS status; + + status = map_nt_error_from_unix_common(errno); + + DEBUG(0, ("Error creating child_pipe: %s\n", + nt_errstr(status))); + + return status; + } + + return NT_STATUS_OK; +} + +/** + * @brief Get a fd to watch for our parent process to exit + * + * Samba parent processes open a pipe that naturally closes when the + * parent exits. Child processes can watch the read end of the pipe + * for readability: Readability with 0 bytes to read means the parent + * has exited and the child process might also want to exit. + */ + +int parent_watch_fd(void) +{ + return reinit_after_fork_pipe[0]; +} + +/** + * Detect died parent by detecting EOF on the pipe + */ +static void reinit_after_fork_pipe_handler(struct tevent_context *ev, + struct tevent_fd *fde, + uint16_t flags, + void *private_data) +{ + char c; + + if (sys_read(reinit_after_fork_pipe[0], &c, 1) != 1) { + /* + * we have reached EOF on stdin, which means the + * parent has exited. Shutdown the server + */ + TALLOC_FREE(fde); + (void)kill(getpid(), SIGTERM); + } +} + + +NTSTATUS reinit_after_fork(struct messaging_context *msg_ctx, + struct tevent_context *ev_ctx, + bool parent_longlived, + const char *comment) +{ + NTSTATUS status = NT_STATUS_OK; + int ret; + + /* + * The main process thread should never + * allow per_thread_cwd_enable() to be + * called. + */ + per_thread_cwd_disable(); + + if (reinit_after_fork_pipe[1] != -1) { + close(reinit_after_fork_pipe[1]); + reinit_after_fork_pipe[1] = -1; + } + + /* tdb needs special fork handling */ + if (tdb_reopen_all(parent_longlived ? 1 : 0) != 0) { + DEBUG(0,("tdb_reopen_all failed.\n")); + status = NT_STATUS_OPEN_FAILED; + goto done; + } + + if (ev_ctx != NULL) { + /* + * The parent can have different private data for the callbacks, + * which are gone in the child. Reset the callbacks to be safe. + */ + tevent_set_trace_callback(ev_ctx, NULL, NULL); + tevent_set_trace_fd_callback(ev_ctx, NULL, NULL); + tevent_set_trace_signal_callback(ev_ctx, NULL, NULL); + tevent_set_trace_timer_callback(ev_ctx, NULL, NULL); + tevent_set_trace_immediate_callback(ev_ctx, NULL, NULL); + tevent_set_trace_queue_callback(ev_ctx, NULL, NULL); + if (tevent_re_initialise(ev_ctx) != 0) { + smb_panic(__location__ ": Failed to re-initialise event context"); + } + } + + if (reinit_after_fork_pipe[0] != -1) { + struct tevent_fd *fde; + + fde = tevent_add_fd(ev_ctx, ev_ctx /* TALLOC_CTX */, + reinit_after_fork_pipe[0], TEVENT_FD_READ, + reinit_after_fork_pipe_handler, NULL); + if (fde == NULL) { + smb_panic(__location__ ": Failed to add reinit_after_fork pipe event"); + } + } + + if (msg_ctx) { + /* + * For clustering, we need to re-init our ctdbd connection after the + * fork + */ + status = messaging_reinit(msg_ctx); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0,("messaging_reinit() failed: %s\n", + nt_errstr(status))); + } + + if (lp_clustering()) { + ret = ctdb_async_ctx_reinit( + NULL, messaging_tevent_context(msg_ctx)); + if (ret != 0) { + DBG_ERR("db_ctdb_async_ctx_reinit failed: %s\n", + strerror(errno)); + return map_nt_error_from_unix(ret); + } + } + } + + if (comment) { + prctl_set_comment("%s", comment); + } + + done: + return status; +} + +/**************************************************************************** + (Hopefully) efficient array append. +****************************************************************************/ + +void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size, + void *element, void *_array, uint32_t *num_elements, + ssize_t *array_size) +{ + void **array = (void **)_array; + + if (*array_size < 0) { + return; + } + + if (*array == NULL) { + if (*array_size == 0) { + *array_size = 128; + } + + if (*array_size >= MAX_ALLOC_SIZE/element_size) { + goto error; + } + + *array = TALLOC(mem_ctx, element_size * (*array_size)); + if (*array == NULL) { + goto error; + } + } + + if (*num_elements == *array_size) { + *array_size *= 2; + + if (*array_size >= MAX_ALLOC_SIZE/element_size) { + goto error; + } + + *array = TALLOC_REALLOC(mem_ctx, *array, + element_size * (*array_size)); + + if (*array == NULL) { + goto error; + } + } + + memcpy((char *)(*array) + element_size*(*num_elements), + element, element_size); + *num_elements += 1; + + return; + + error: + *num_elements = 0; + *array_size = -1; +} + +/**************************************************************************** + Get my own domain name, or "" if we have none. +****************************************************************************/ + +char *get_mydnsdomname(TALLOC_CTX *ctx) +{ + const char *domname; + char *p; + + domname = get_mydnsfullname(); + if (!domname) { + return NULL; + } + + p = strchr_m(domname, '.'); + if (p) { + p++; + return talloc_strdup(ctx, p); + } else { + return talloc_strdup(ctx, ""); + } +} + +bool process_exists(const struct server_id pid) +{ + return serverid_exists(&pid); +} + +/******************************************************************* + Convert a uid into a user name. +********************************************************************/ + +const char *uidtoname(uid_t uid) +{ + TALLOC_CTX *ctx = talloc_tos(); + char *name = NULL; + struct passwd *pass = NULL; + + pass = getpwuid_alloc(ctx,uid); + if (pass) { + name = talloc_strdup(ctx,pass->pw_name); + TALLOC_FREE(pass); + } else { + name = talloc_asprintf(ctx, + "%ld", + (long int)uid); + } + return name; +} + +/******************************************************************* + Convert a gid into a group name. +********************************************************************/ + +char *gidtoname(gid_t gid) +{ + struct group *grp; + + grp = getgrgid(gid); + if (grp) { + return talloc_strdup(talloc_tos(), grp->gr_name); + } + else { + return talloc_asprintf(talloc_tos(), + "%d", + (int)gid); + } +} + +/******************************************************************* + Convert a user name into a uid. +********************************************************************/ + +uid_t nametouid(const char *name) +{ + struct passwd *pass; + char *p; + uid_t u; + + pass = Get_Pwnam_alloc(talloc_tos(), name); + if (pass) { + u = pass->pw_uid; + TALLOC_FREE(pass); + return u; + } + + u = (uid_t)strtol(name, &p, 0); + if ((p != name) && (*p == '\0')) + return u; + + return (uid_t)-1; +} + +/******************************************************************* + Convert a name to a gid_t if possible. Return -1 if not a group. +********************************************************************/ + +gid_t nametogid(const char *name) +{ + struct group *grp; + char *p; + gid_t g; + + g = (gid_t)strtol(name, &p, 0); + if ((p != name) && (*p == '\0')) + return g; + + grp = getgrnam(name); + if (grp) + return(grp->gr_gid); + return (gid_t)-1; +} + +/******************************************************************* + Something really nasty happened - panic ! +********************************************************************/ + +void smb_panic_s3(const char *why) +{ + const struct loadparm_substitution *lp_sub = + loadparm_s3_global_substitution(); + char *cmd; + int result; + +#if defined(HAVE_PRCTL) && defined(PR_SET_PTRACER) + /* + * Make sure all children can attach a debugger. + */ + prctl(PR_SET_PTRACER, getpid(), 0, 0, 0); +#endif + + cmd = lp_panic_action(talloc_tos(), lp_sub); + if (cmd && *cmd) { + DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd)); + result = system(cmd); + + if (result == -1) + DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n", + strerror(errno))); + else + DEBUG(0, ("smb_panic(): action returned status %d\n", + WEXITSTATUS(result))); + } + + dump_core(); +} + +/******************************************************************* + A readdir wrapper which just returns the file name. + ********************************************************************/ + +const char *readdirname(DIR *p) +{ + struct dirent *ptr; + char *dname; + + if (!p) + return(NULL); + + ptr = (struct dirent *)readdir(p); + if (!ptr) + return(NULL); + + dname = ptr->d_name; + + return talloc_strdup(talloc_tos(), dname); +} + +/******************************************************************* + Utility function used to decide if the last component + of a path matches a (possibly wildcarded) entry in a namelist. +********************************************************************/ + +bool is_in_path(const char *name, name_compare_entry *namelist, bool case_sensitive) +{ + const char *last_component; + + /* if we have no list it's obviously not in the path */ + if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) { + return False; + } + + /* Do not reject path components if namelist is set to '.*' */ + if (ISDOT(name) || ISDOTDOT(name)) { + return false; + } + + DEBUG(8, ("is_in_path: %s\n", name)); + + /* Get the last component of the unix name. */ + last_component = strrchr_m(name, '/'); + if (!last_component) { + last_component = name; + } else { + last_component++; /* Go past '/' */ + } + + for(; namelist->name != NULL; namelist++) { + if(namelist->is_wild) { + if (mask_match(last_component, namelist->name, case_sensitive)) { + DEBUG(8,("is_in_path: mask match succeeded\n")); + return True; + } + } else { + if((case_sensitive && (strcmp(last_component, namelist->name) == 0))|| + (!case_sensitive && (strcasecmp_m(last_component, namelist->name) == 0))) { + DEBUG(8,("is_in_path: match succeeded\n")); + return True; + } + } + } + DEBUG(8,("is_in_path: match not found\n")); + return False; +} + +/******************************************************************* + Strip a '/' separated list into an array of + name_compare_enties structures suitable for + passing to is_in_path(). We do this for + speed so we can pre-parse all the names in the list + and don't do it for each call to is_in_path(). + We also check if the entry contains a wildcard to + remove a potentially expensive call to mask_match + if possible. +********************************************************************/ + +void set_namearray(name_compare_entry **ppname_array, const char *namelist_in) +{ + char *name_end; + char *namelist; + char *namelist_end; + char *nameptr; + int num_entries = 0; + int i; + + (*ppname_array) = NULL; + + if((namelist_in == NULL ) || ((namelist_in != NULL) && (*namelist_in == '\0'))) + return; + + namelist = talloc_strdup(talloc_tos(), namelist_in); + if (namelist == NULL) { + DEBUG(0,("set_namearray: talloc fail\n")); + return; + } + nameptr = namelist; + + namelist_end = &namelist[strlen(namelist)]; + + /* We need to make two passes over the string. The + first to count the number of elements, the second + to split it. + */ + + while(nameptr <= namelist_end) { + if ( *nameptr == '/' ) { + /* cope with multiple (useless) /s) */ + nameptr++; + continue; + } + /* anything left? */ + if ( *nameptr == '\0' ) + break; + + /* find the next '/' or consume remaining */ + name_end = strchr_m(nameptr, '/'); + if (name_end == NULL) { + /* Point nameptr at the terminating '\0' */ + nameptr += strlen(nameptr); + } else { + /* next segment please */ + nameptr = name_end + 1; + } + num_entries++; + } + + if(num_entries == 0) { + talloc_free(namelist); + return; + } + + if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) { + DEBUG(0,("set_namearray: malloc fail\n")); + talloc_free(namelist); + return; + } + + /* Now copy out the names */ + nameptr = namelist; + i = 0; + while(nameptr <= namelist_end) { + if ( *nameptr == '/' ) { + /* cope with multiple (useless) /s) */ + nameptr++; + continue; + } + /* anything left? */ + if ( *nameptr == '\0' ) + break; + + /* find the next '/' or consume remaining */ + name_end = strchr_m(nameptr, '/'); + if (name_end != NULL) { + *name_end = '\0'; + } + + (*ppname_array)[i].is_wild = ms_has_wild(nameptr); + if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) { + DEBUG(0,("set_namearray: malloc fail (1)\n")); + talloc_free(namelist); + return; + } + + if (name_end == NULL) { + /* Point nameptr at the terminating '\0' */ + nameptr += strlen(nameptr); + } else { + /* next segment please */ + nameptr = name_end + 1; + } + i++; + } + + (*ppname_array)[i].name = NULL; + + talloc_free(namelist); + return; +} + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_LOCKING + +/**************************************************************************** + Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping + is dealt with in posix.c + Returns True if we have information regarding this lock region (and returns + F_UNLCK in *ptype if the region is unlocked). False if the call failed. +****************************************************************************/ + +bool fcntl_getlock(int fd, int op, off_t *poffset, off_t *pcount, int *ptype, pid_t *ppid) +{ + struct flock lock; + int ret; + + DEBUG(8,("fcntl_getlock fd=%d op=%d offset=%.0f count=%.0f type=%d\n", + fd,op,(double)*poffset,(double)*pcount,*ptype)); + + lock.l_type = *ptype; + lock.l_whence = SEEK_SET; + lock.l_start = *poffset; + lock.l_len = *pcount; + lock.l_pid = 0; + + ret = sys_fcntl_ptr(fd,op,&lock); + + if (ret == -1) { + int sav = errno; + DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n", + (double)*poffset,(double)*pcount,*ptype,strerror(errno))); + errno = sav; + return False; + } + + *ptype = lock.l_type; + *poffset = lock.l_start; + *pcount = lock.l_len; + *ppid = lock.l_pid; + + DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n", + fd, (int)lock.l_type, (unsigned int)lock.l_pid)); + return True; +} + +#if defined(HAVE_OFD_LOCKS) +int map_process_lock_to_ofd_lock(int op) +{ + switch (op) { + case F_GETLK: + case F_OFD_GETLK: + op = F_OFD_GETLK; + break; + case F_SETLK: + case F_OFD_SETLK: + op = F_OFD_SETLK; + break; + case F_SETLKW: + case F_OFD_SETLKW: + op = F_OFD_SETLKW; + break; + default: + return -1; + } + return op; +} +#else /* HAVE_OFD_LOCKS */ +int map_process_lock_to_ofd_lock(int op) +{ + return op; +} +#endif /* HAVE_OFD_LOCKS */ + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_ALL + +/******************************************************************* + Is the name specified one of my netbios names. + Returns true if it is equal, false otherwise. +********************************************************************/ + +static bool nb_name_equal(const char *s1, const char *s2) +{ + int cmp = strncasecmp_m(s1, s2, MAX_NETBIOSNAME_LEN-1); + return (cmp == 0); +} + +bool is_myname(const char *s) +{ + const char **aliases = NULL; + bool ok = false; + + ok = nb_name_equal(lp_netbios_name(), s); + if (ok) { + goto done; + } + + aliases = lp_netbios_aliases(); + if (aliases == NULL) { + goto done; + } + + while (*aliases != NULL) { + ok = nb_name_equal(*aliases, s); + if (ok) { + goto done; + } + aliases += 1; + } + +done: + DBG_DEBUG("is_myname(\"%s\") returns %d\n", s, (int)ok); + return ok; +} + +/******************************************************************* + we distinguish between 2K and XP by the "Native Lan Manager" string + WinXP => "Windows 2002 5.1" + WinXP 64bit => "Windows XP 5.2" + Win2k => "Windows 2000 5.0" + NT4 => "Windows NT 4.0" + Win9x => "Windows 4.0" + Windows 2003 doesn't set the native lan manager string but + they do set the domain to "Windows 2003 5.2" (probably a bug). +********************************************************************/ + +void ra_lanman_string( const char *native_lanman ) +{ + if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 ) + set_remote_arch( RA_WINXP ); + else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 ) + set_remote_arch( RA_WINXP64 ); + else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 ) + set_remote_arch( RA_WIN2K3 ); +} + +static const char *remote_arch_strings[] = { + [RA_UNKNOWN] = "UNKNOWN", + [RA_WFWG] = "WfWg", + [RA_OS2] = "OS2", + [RA_WIN95] = "Win95", + [RA_WINNT] = "WinNT", + [RA_WIN2K] = "Win2K", + [RA_WINXP] = "WinXP", + [RA_WIN2K3] = "Win2K3", + [RA_VISTA] = "Vista", + [RA_SAMBA] = "Samba", + [RA_CIFSFS] = "CIFSFS", + [RA_WINXP64] = "WinXP64", + [RA_OSX] = "OSX", +}; + +const char *get_remote_arch_str(void) +{ + if (ra_type >= ARRAY_SIZE(remote_arch_strings)) { + /* + * set_remote_arch() already checks this so ra_type + * should be in the allowed range, but anyway, let's + * do another bound check here. + */ + DBG_ERR("Remote arch info out of sync [%d] missing\n", ra_type); + ra_type = RA_UNKNOWN; + } + return remote_arch_strings[ra_type]; +} + +enum remote_arch_types get_remote_arch_from_str(const char *remote_arch_string) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(remote_arch_strings); i++) { + if (strcmp(remote_arch_string, remote_arch_strings[i]) == 0) { + return i; + } + } + return RA_UNKNOWN; +} + +/******************************************************************* + Set the horrid remote_arch string based on an enum. +********************************************************************/ + +void set_remote_arch(enum remote_arch_types type) +{ + if (ra_type >= ARRAY_SIZE(remote_arch_strings)) { + /* + * This protects against someone adding values to enum + * remote_arch_types without updating + * remote_arch_strings array. + */ + DBG_ERR("Remote arch info out of sync [%d] missing\n", ra_type); + ra_type = RA_UNKNOWN; + return; + } + + ra_type = type; + DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n", + get_remote_arch_str())); +} + +/******************************************************************* + Get the remote_arch type. +********************************************************************/ + +enum remote_arch_types get_remote_arch(void) +{ + return ra_type; +} + +#define RA_CACHE_TTL 7*24*3600 + +static bool remote_arch_cache_key(const struct GUID *client_guid, + fstring key) +{ + struct GUID_txt_buf guid_buf; + const char *guid_string = NULL; + + guid_string = GUID_buf_string(client_guid, &guid_buf); + if (guid_string == NULL) { + return false; + } + + fstr_sprintf(key, "RA/%s", guid_string); + return true; +} + +struct ra_parser_state { + bool found; + enum remote_arch_types ra; +}; + +static void ra_parser(const struct gencache_timeout *t, + DATA_BLOB blob, + void *priv_data) +{ + struct ra_parser_state *state = (struct ra_parser_state *)priv_data; + const char *ra_str = NULL; + + if (gencache_timeout_expired(t)) { + return; + } + + if ((blob.length == 0) || (blob.data[blob.length-1] != '\0')) { + DBG_ERR("Remote arch cache key not a string\n"); + return; + } + + ra_str = (const char *)blob.data; + DBG_INFO("Got remote arch [%s] from cache\n", ra_str); + + state->ra = get_remote_arch_from_str(ra_str); + state->found = true; + return; +} + +static bool remote_arch_cache_get(const struct GUID *client_guid) +{ + bool ok; + fstring ra_key; + struct ra_parser_state state = (struct ra_parser_state) { + .found = false, + .ra = RA_UNKNOWN, + }; + + ok = remote_arch_cache_key(client_guid, ra_key); + if (!ok) { + return false; + } + + ok = gencache_parse(ra_key, ra_parser, &state); + if (!ok || !state.found) { + return true; + } + + if (state.ra == RA_UNKNOWN) { + return true; + } + + set_remote_arch(state.ra); + return true; +} + +static bool remote_arch_cache_set(const struct GUID *client_guid) +{ + bool ok; + fstring ra_key; + const char *ra_str = NULL; + + if (get_remote_arch() == RA_UNKNOWN) { + return true; + } + + ok = remote_arch_cache_key(client_guid, ra_key); + if (!ok) { + return false; + } + + ra_str = get_remote_arch_str(); + if (ra_str == NULL) { + return false; + } + + ok = gencache_set(ra_key, ra_str, time(NULL) + RA_CACHE_TTL); + if (!ok) { + return false; + } + + return true; +} + +bool remote_arch_cache_update(const struct GUID *client_guid) +{ + bool ok; + + if (get_remote_arch() == RA_UNKNOWN) { + + become_root(); + ok = remote_arch_cache_get(client_guid); + unbecome_root(); + + return ok; + } + + become_root(); + ok = remote_arch_cache_set(client_guid); + unbecome_root(); + + return ok; +} + +bool remote_arch_cache_delete(const struct GUID *client_guid) +{ + bool ok; + fstring ra_key; + + ok = remote_arch_cache_key(client_guid, ra_key); + if (!ok) { + return false; + } + + become_root(); + ok = gencache_del(ra_key); + unbecome_root(); + + if (!ok) { + return false; + } + + return true; +} + +const char *tab_depth(int level, int depth) +{ + if( CHECK_DEBUGLVL(level) ) { + dbgtext("%*s", depth*4, ""); + } + return ""; +} + +/***************************************************************************** + Provide a checksum on a string + + Input: s - the null-terminated character string for which the checksum + will be calculated. + + Output: The checksum value calculated for s. +*****************************************************************************/ + +int str_checksum(const char *s) +{ + TDB_DATA key; + if (s == NULL) + return 0; + + key = (TDB_DATA) { .dptr = discard_const_p(uint8_t, s), + .dsize = strlen(s) }; + + return tdb_jenkins_hash(&key); +} + +/***************************************************************** + Zero a memory area then free it. Used to catch bugs faster. +*****************************************************************/ + +void zero_free(void *p, size_t size) +{ + memset(p, 0, size); + SAFE_FREE(p); +} + +/***************************************************************** + Set our open file limit to a requested max and return the limit. +*****************************************************************/ + +int set_maxfiles(int requested_max) +{ +#if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)) + struct rlimit rlp; + int saved_current_limit; + + if(getrlimit(RLIMIT_NOFILE, &rlp)) { + DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n", + strerror(errno) )); + /* just guess... */ + return requested_max; + } + + /* + * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to + * account for the extra fd we need + * as well as the log files and standard + * handles etc. Save the limit we want to set in case + * we are running on an OS that doesn't support this limit (AIX) + * which always returns RLIM_INFINITY for rlp.rlim_max. + */ + + /* Try raising the hard (max) limit to the requested amount. */ + +#if defined(RLIM_INFINITY) + if (rlp.rlim_max != RLIM_INFINITY) { + int orig_max = rlp.rlim_max; + + if ( rlp.rlim_max < requested_max ) + rlp.rlim_max = requested_max; + + /* This failing is not an error - many systems (Linux) don't + support our default request of 10,000 open files. JRA. */ + + if(setrlimit(RLIMIT_NOFILE, &rlp)) { + DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n", + (int)rlp.rlim_max, strerror(errno) )); + + /* Set failed - restore original value from get. */ + rlp.rlim_max = orig_max; + } + } +#endif + + /* Now try setting the soft (current) limit. */ + + saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max); + + if(setrlimit(RLIMIT_NOFILE, &rlp)) { + DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n", + (int)rlp.rlim_cur, strerror(errno) )); + /* just guess... */ + return saved_current_limit; + } + + if(getrlimit(RLIMIT_NOFILE, &rlp)) { + DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n", + strerror(errno) )); + /* just guess... */ + return saved_current_limit; + } + +#if defined(RLIM_INFINITY) + if(rlp.rlim_cur == RLIM_INFINITY) + return saved_current_limit; +#endif + + if((int)rlp.rlim_cur > saved_current_limit) + return saved_current_limit; + + return rlp.rlim_cur; +#else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */ + /* + * No way to know - just guess... + */ + return requested_max; +#endif +} + +/***************************************************************** + malloc that aborts with smb_panic on fail or zero size. + *****************************************************************/ + +void *smb_xmalloc_array(size_t size, unsigned int count) +{ + void *p; + if (size == 0) { + smb_panic("smb_xmalloc_array: called with zero size"); + } + if (count >= MAX_ALLOC_SIZE/size) { + smb_panic("smb_xmalloc_array: alloc size too large"); + } + if ((p = SMB_MALLOC(size*count)) == NULL) { + DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n", + (unsigned long)size, (unsigned long)count)); + smb_panic("smb_xmalloc_array: malloc failed"); + } + return p; +} + +/***************************************************************** + Get local hostname and cache result. +*****************************************************************/ + +char *myhostname(void) +{ + static char *ret; + if (ret == NULL) { + ret = get_myname(NULL); + } + return ret; +} + +/***************************************************************** + Get local hostname and cache result. +*****************************************************************/ + +char *myhostname_upper(void) +{ + static char *ret; + if (ret == NULL) { + char *name = get_myname(NULL); + if (name == NULL) { + return NULL; + } + ret = strupper_talloc(NULL, name); + talloc_free(name); + } + return ret; +} + +/******************************************************************* + Given a filename - get its directory name +********************************************************************/ + +bool parent_dirname(TALLOC_CTX *mem_ctx, const char *dir, char **parent, + const char **name) +{ + char *p; + ptrdiff_t len; + + p = strrchr_m(dir, '/'); /* Find final '/', if any */ + + if (p == NULL) { + if (!(*parent = talloc_strdup(mem_ctx, "."))) { + return False; + } + if (name) { + *name = dir; + } + return True; + } + + len = p-dir; + + *parent = talloc_strndup(mem_ctx, dir, len); + if (*parent == NULL) { + return False; + } + + if (name) { + *name = p+1; + } + return True; +} + +/******************************************************************* + Determine if a pattern contains any Microsoft wildcard characters. +*******************************************************************/ + +bool ms_has_wild(const char *s) +{ + char c; + + while ((c = *s++)) { + switch (c) { + case '*': + case '?': + case '<': + case '>': + case '"': + return True; + } + } + return False; +} + +bool ms_has_wild_w(const smb_ucs2_t *s) +{ + smb_ucs2_t c; + if (!s) return False; + while ((c = *s++)) { + switch (c) { + case UCS2_CHAR('*'): + case UCS2_CHAR('?'): + case UCS2_CHAR('<'): + case UCS2_CHAR('>'): + case UCS2_CHAR('"'): + return True; + } + } + return False; +} + +/******************************************************************* + A wrapper that handles case sensitivity and the special handling + of the ".." name. +*******************************************************************/ + +bool mask_match(const char *string, const char *pattern, bool is_case_sensitive) +{ + if (ISDOTDOT(string)) + string = "."; + if (ISDOT(pattern)) + return False; + + return ms_fnmatch_protocol(pattern, string, Protocol, is_case_sensitive) == 0; +} + +/******************************************************************* + A wrapper that handles case sensitivity and the special handling + of the ".." name. Varient that is only called by old search code which requires + pattern translation. +*******************************************************************/ + +bool mask_match_search(const char *string, const char *pattern, bool is_case_sensitive) +{ + if (ISDOTDOT(string)) + string = "."; + if (ISDOT(pattern)) + return False; + + return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0; +} + +/******************************************************************* + A wrapper that handles a list of patters and calls mask_match() + on each. Returns True if any of the patterns match. +*******************************************************************/ + +bool mask_match_list(const char *string, char **list, int listLen, bool is_case_sensitive) +{ + while (listLen-- > 0) { + if (mask_match(string, *list++, is_case_sensitive)) + return True; + } + return False; +} + +/********************************************************************** + Converts a name to a fully qualified domain name. + Returns true if lookup succeeded, false if not (then fqdn is set to name) + Uses getaddrinfo() with AI_CANONNAME flag to obtain the official + canonical name of the host. getaddrinfo() may use a variety of sources + including /etc/hosts to obtain the domainname. It expects aliases in + /etc/hosts to NOT be the FQDN. The FQDN should come first. +************************************************************************/ + +bool name_to_fqdn(fstring fqdn, const char *name) +{ + char *full = NULL; + struct addrinfo hints; + struct addrinfo *result; + int s; + + /* Configure hints to obtain canonical name */ + + memset(&hints, 0, sizeof(struct addrinfo)); + hints.ai_family = AF_UNSPEC; /* Allow IPv4 or IPv6 */ + hints.ai_socktype = SOCK_DGRAM; /* Datagram socket */ + hints.ai_flags = AI_CANONNAME; /* Get host's FQDN */ + hints.ai_protocol = 0; /* Any protocol */ + + s = getaddrinfo(name, NULL, &hints, &result); + if (s != 0) { + DBG_WARNING("getaddrinfo lookup for %s failed: %s\n", + name, + gai_strerror(s)); + fstrcpy(fqdn, name); + return false; + } + full = result->ai_canonname; + + /* Find out if the FQDN is returned as an alias + * to cope with /etc/hosts files where the first + * name is not the FQDN but the short name. + * getaddrinfo provides no easy way of handling aliases + * in /etc/hosts. Users should make sure the FQDN + * comes first in /etc/hosts. */ + if (full && (! strchr_m(full, '.'))) { + DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n")); + DEBUGADD(1, (" Full qualified domain names (FQDNs) should not be specified\n")); + DEBUGADD(1, (" as an alias in /etc/hosts. FQDN should be the first name\n")); + DEBUGADD(1, (" prior to any aliases.\n")); + } + if (full && (strcasecmp_m(full, "localhost.localdomain") == 0)) { + DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n")); + DEBUGADD(1, (" Specifying the machine hostname for address 127.0.0.1 may lead\n")); + DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n")); + DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n")); + } + + DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full)); + fstrcpy(fqdn, full); + freeaddrinfo(result); /* No longer needed */ + return true; +} + +uint32_t map_share_mode_to_deny_mode(uint32_t share_access, uint32_t private_options) +{ + switch (share_access & ~FILE_SHARE_DELETE) { + case FILE_SHARE_NONE: + return DENY_ALL; + case FILE_SHARE_READ: + return DENY_WRITE; + case FILE_SHARE_WRITE: + return DENY_READ; + case FILE_SHARE_READ|FILE_SHARE_WRITE: + return DENY_NONE; + } + if (private_options & NTCREATEX_FLAG_DENY_DOS) { + return DENY_DOS; + } else if (private_options & NTCREATEX_FLAG_DENY_FCB) { + return DENY_FCB; + } + + return (uint32_t)-1; +} + +struct server_id interpret_pid(const char *pid_string) +{ + return server_id_from_string(get_my_vnn(), pid_string); +} + +/**************************************************************** + Check if an offset into a buffer is safe. + If this returns True it's safe to indirect into the byte at + pointer ptr+off. +****************************************************************/ + +bool is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off) +{ + const char *end_base = buf_base + buf_len; + char *end_ptr = ptr + off; + + if (!buf_base || !ptr) { + return False; + } + + if (end_base < buf_base || end_ptr < ptr) { + return False; /* wrap. */ + } + + if (end_ptr < end_base) { + return True; + } + return False; +} + +/**************************************************************** + Return a safe pointer into a buffer, or NULL. +****************************************************************/ + +char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off) +{ + return is_offset_safe(buf_base, buf_len, ptr, off) ? + ptr + off : NULL; +} + +/**************************************************************** + Return a safe pointer into a string within a buffer, or NULL. +****************************************************************/ + +char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off) +{ + if (!is_offset_safe(buf_base, buf_len, ptr, off)) { + return NULL; + } + /* Check if a valid string exists at this offset. */ + if (skip_string(buf_base,buf_len, ptr + off) == NULL) { + return NULL; + } + return ptr + off; +} + +/**************************************************************** + Return an SVAL at a pointer, or failval if beyond the end. +****************************************************************/ + +int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval) +{ + /* + * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1], + * NOT ptr[2]. + */ + if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) { + return failval; + } + return SVAL(ptr,off); +} + +/**************************************************************** + Return an IVAL at a pointer, or failval if beyond the end. +****************************************************************/ + +int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval) +{ + /* + * Note we use off+3 here, not off+4 as IVAL accesses + * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4]. + */ + if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) { + return failval; + } + return IVAL(ptr,off); +} + +/**************************************************************** + Split DOM\user into DOM and user. Do not mix with winbind variants of that + call (they take care of winbind separator and other winbind specific settings). +****************************************************************/ + +bool split_domain_user(TALLOC_CTX *mem_ctx, + const char *full_name, + char **domain, + char **user) +{ + const char *p = NULL; + + p = strchr_m(full_name, '\\'); + + if (p != NULL) { + *domain = talloc_strndup(mem_ctx, full_name, + PTR_DIFF(p, full_name)); + if (*domain == NULL) { + return false; + } + *user = talloc_strdup(mem_ctx, p+1); + if (*user == NULL) { + TALLOC_FREE(*domain); + return false; + } + } else { + *domain = NULL; + *user = talloc_strdup(mem_ctx, full_name); + if (*user == NULL) { + return false; + } + } + + return true; +} + +/**************************************************************** + strip off leading '\\' from a hostname +****************************************************************/ + +const char *strip_hostname(const char *s) +{ + if (!s) { + return NULL; + } + + if (strlen_m(s) < 3) { + return s; + } + + if (s[0] == '\\') s++; + if (s[0] == '\\') s++; + + return s; +} + +bool any_nt_status_not_ok(NTSTATUS err1, NTSTATUS err2, NTSTATUS *result) +{ + if (!NT_STATUS_IS_OK(err1)) { + *result = err1; + return true; + } + if (!NT_STATUS_IS_OK(err2)) { + *result = err2; + return true; + } + return false; +} + +int timeval_to_msec(struct timeval t) +{ + return t.tv_sec * 1000 + (t.tv_usec+999) / 1000; +} + +/******************************************************************* + Check a given DOS pathname is valid for a share. +********************************************************************/ + +char *valid_share_pathname(TALLOC_CTX *ctx, const char *dos_pathname) +{ + char *ptr = NULL; + + if (!dos_pathname) { + return NULL; + } + + ptr = talloc_strdup(ctx, dos_pathname); + if (!ptr) { + return NULL; + } + /* Convert any '\' paths to '/' */ + unix_format(ptr); + ptr = unix_clean_name(ctx, ptr); + if (!ptr) { + return NULL; + } + + /* NT is braindead - it wants a C: prefix to a pathname ! So strip it. */ + if (strlen(ptr) > 2 && ptr[1] == ':' && ptr[0] != '/') + ptr += 2; + + /* Only absolute paths allowed. */ + if (*ptr != '/') + return NULL; + + return ptr; +} + +/******************************************************************* + Return True if the filename is one of the special executable types. +********************************************************************/ + +bool is_executable(const char *fname) +{ + if ((fname = strrchr_m(fname,'.'))) { + if (strequal(fname,".com") || + strequal(fname,".dll") || + strequal(fname,".exe") || + strequal(fname,".sym")) { + return True; + } + } + return False; +} + +/**************************************************************************** + Open a file with a share mode - old openX method - map into NTCreate. +****************************************************************************/ + +bool map_open_params_to_ntcreate(const char *smb_base_fname, + int deny_mode, int open_func, + uint32_t *paccess_mask, + uint32_t *pshare_mode, + uint32_t *pcreate_disposition, + uint32_t *pcreate_options, + uint32_t *pprivate_flags) +{ + uint32_t access_mask; + uint32_t share_mode; + uint32_t create_disposition; + uint32_t create_options = FILE_NON_DIRECTORY_FILE; + uint32_t private_flags = 0; + + DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, " + "open_func = 0x%x\n", + smb_base_fname, (unsigned int)deny_mode, + (unsigned int)open_func )); + + /* Create the NT compatible access_mask. */ + switch (GET_OPENX_MODE(deny_mode)) { + case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */ + case DOS_OPEN_RDONLY: + access_mask = FILE_GENERIC_READ; + break; + case DOS_OPEN_WRONLY: + access_mask = FILE_GENERIC_WRITE; + break; + case DOS_OPEN_RDWR: + case DOS_OPEN_FCB: + access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE; + break; + default: + DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n", + (unsigned int)GET_OPENX_MODE(deny_mode))); + return False; + } + + /* Create the NT compatible create_disposition. */ + switch (open_func) { + case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST: + create_disposition = FILE_CREATE; + break; + + case OPENX_FILE_EXISTS_OPEN: + create_disposition = FILE_OPEN; + break; + + case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST: + create_disposition = FILE_OPEN_IF; + break; + + case OPENX_FILE_EXISTS_TRUNCATE: + create_disposition = FILE_OVERWRITE; + break; + + case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST: + create_disposition = FILE_OVERWRITE_IF; + break; + + default: + /* From samba4 - to be confirmed. */ + if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) { + create_disposition = FILE_CREATE; + break; + } + DEBUG(10,("map_open_params_to_ntcreate: bad " + "open_func 0x%x\n", (unsigned int)open_func)); + return False; + } + + /* Create the NT compatible share modes. */ + switch (GET_DENY_MODE(deny_mode)) { + case DENY_ALL: + share_mode = FILE_SHARE_NONE; + break; + + case DENY_WRITE: + share_mode = FILE_SHARE_READ; + break; + + case DENY_READ: + share_mode = FILE_SHARE_WRITE; + break; + + case DENY_NONE: + share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE; + break; + + case DENY_DOS: + private_flags |= NTCREATEX_FLAG_DENY_DOS; + if (is_executable(smb_base_fname)) { + share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE; + } else { + if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) { + share_mode = FILE_SHARE_READ; + } else { + share_mode = FILE_SHARE_NONE; + } + } + break; + + case DENY_FCB: + private_flags |= NTCREATEX_FLAG_DENY_FCB; + share_mode = FILE_SHARE_NONE; + break; + + default: + DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n", + (unsigned int)GET_DENY_MODE(deny_mode) )); + return False; + } + + DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, " + "share_mode = 0x%x, create_disposition = 0x%x, " + "create_options = 0x%x private_flags = 0x%x\n", + smb_base_fname, + (unsigned int)access_mask, + (unsigned int)share_mode, + (unsigned int)create_disposition, + (unsigned int)create_options, + (unsigned int)private_flags)); + + if (paccess_mask) { + *paccess_mask = access_mask; + } + if (pshare_mode) { + *pshare_mode = share_mode; + } + if (pcreate_disposition) { + *pcreate_disposition = create_disposition; + } + if (pcreate_options) { + *pcreate_options = create_options; + } + if (pprivate_flags) { + *pprivate_flags = private_flags; + } + + return True; + +} + +/************************************************************************* + Return a talloced copy of a struct security_unix_token. NULL on fail. +*************************************************************************/ + +struct security_unix_token *copy_unix_token(TALLOC_CTX *ctx, const struct security_unix_token *tok) +{ + struct security_unix_token *cpy; + + cpy = talloc(ctx, struct security_unix_token); + if (!cpy) { + return NULL; + } + + cpy->uid = tok->uid; + cpy->gid = tok->gid; + cpy->ngroups = tok->ngroups; + if (tok->ngroups) { + /* Make this a talloc child of cpy. */ + cpy->groups = (gid_t *)talloc_memdup( + cpy, tok->groups, tok->ngroups * sizeof(gid_t)); + if (!cpy->groups) { + TALLOC_FREE(cpy); + return NULL; + } + } else { + cpy->groups = NULL; + } + return cpy; +} + +/**************************************************************************** + Return a root token +****************************************************************************/ + +struct security_unix_token *root_unix_token(TALLOC_CTX *mem_ctx) +{ + struct security_unix_token *t = NULL; + + t = talloc_zero(mem_ctx, struct security_unix_token); + if (t == NULL) { + return NULL; + } + + /* + * This is not needed, but lets make it explicit, not implicit. + */ + *t = (struct security_unix_token) { + .uid = 0, + .gid = 0, + .ngroups = 0, + .groups = NULL + }; + + return t; +} + +char *utok_string(TALLOC_CTX *mem_ctx, const struct security_unix_token *tok) +{ + char *str; + uint32_t i; + + str = talloc_asprintf( + mem_ctx, + "uid=%ju, gid=%ju, %"PRIu32" groups:", + (uintmax_t)(tok->uid), + (uintmax_t)(tok->gid), + tok->ngroups); + + for (i=0; i<tok->ngroups; i++) { + talloc_asprintf_addbuf( + &str, " %ju", (uintmax_t)tok->groups[i]); + } + + return str; +} + +/**************************************************************************** + Check that a file matches a particular file type. +****************************************************************************/ + +bool dir_check_ftype(uint32_t mode, uint32_t dirtype) +{ + uint32_t mask; + + /* Check the "may have" search bits. */ + if (((mode & ~dirtype) & + (FILE_ATTRIBUTE_HIDDEN | + FILE_ATTRIBUTE_SYSTEM | + FILE_ATTRIBUTE_DIRECTORY)) != 0) { + return false; + } + + /* Check the "must have" bits, + which are the may have bits shifted eight */ + /* If must have bit is set, the file/dir can + not be returned in search unless the matching + file attribute is set */ + mask = ((dirtype >> 8) & (FILE_ATTRIBUTE_DIRECTORY| + FILE_ATTRIBUTE_ARCHIVE| + FILE_ATTRIBUTE_READONLY| + FILE_ATTRIBUTE_HIDDEN| + FILE_ATTRIBUTE_SYSTEM)); /* & 0x37 */ + if(mask) { + if((mask & (mode & (FILE_ATTRIBUTE_DIRECTORY| + FILE_ATTRIBUTE_ARCHIVE| + FILE_ATTRIBUTE_READONLY| + FILE_ATTRIBUTE_HIDDEN| + FILE_ATTRIBUTE_SYSTEM))) == mask) { + /* check if matching attribute present */ + return true; + } else { + return false; + } + } + + return true; +} |