/* Unix SMB/Netbios implementation. Version 1.9. Samba utility functions Copyright (C) Andrew Tridgell 1992-1998 Copyright (C) Jeremy Allison 2001 Copyright (C) Simo Sorce 2001 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. */ #include "includes.h" #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT)) #ifdef WITH_NISPLUS_HOME #ifdef BROKEN_NISPLUS_INCLUDE_FILES /* * The following lines are needed due to buggy include files * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA. * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as * an enum in /usr/include/rpcsvc/nis.h. */ #if defined(GROUP) #undef GROUP #endif #if defined(GROUP_OBJ) #undef GROUP_OBJ #endif #endif /* BROKEN_NISPLUS_INCLUDE_FILES */ #include #else /* !WITH_NISPLUS_HOME */ #include "rpcsvc/ypclnt.h" #endif /* WITH_NISPLUS_HOME */ #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */ #ifdef WITH_SSL #include #undef Realloc /* SSLeay defines this and samba has a function of this name */ extern SSL *ssl; extern int sslFd; #endif /* WITH_SSL */ int Protocol = PROTOCOL_COREPLUS; /* a default finfo structure to ensure all fields are sensible */ file_info def_finfo = {-1,0,0,0,0,0,0,"",""}; /* this is used by the chaining code */ int chain_size = 0; int trans_num = 0; /* case handling on filenames */ int case_default = CASE_LOWER; /* the following control case operations - they are put here so the client can link easily */ BOOL case_sensitive; BOOL case_preserve; BOOL use_mangled_map = False; BOOL short_case_preserve; BOOL case_mangle; static enum remote_arch_types ra_type = RA_UNKNOWN; pstring user_socket_options=DEFAULT_SOCKET_OPTIONS; pstring global_myname = ""; fstring global_myworkgroup = ""; char **my_netbios_names; /**************************************************************************** find a suitable temporary directory. The result should be copied immediately as it may be overwritten by a subsequent call. ****************************************************************************/ char *tmpdir(void) { char *p; if ((p = getenv("TMPDIR"))) return p; return "/tmp"; } /**************************************************************************** Determine whether we are in the specified group. ****************************************************************************/ BOOL in_group(gid_t group, gid_t current_gid, int ngroups, gid_t *groups) { int i; if (group == current_gid) return(True); for (i=0;ist_mode)); } /******************************************************************* Check a files mod time. ********************************************************************/ time_t file_modtime(const char *fname) { SMB_STRUCT_STAT st; if (sys_stat(fname,&st) != 0) return(0); return(st.st_mtime); } /******************************************************************* Check if a directory exists. ********************************************************************/ BOOL directory_exist(char *dname,SMB_STRUCT_STAT *st) { SMB_STRUCT_STAT st2; BOOL ret; if (!st) st = &st2; if (sys_stat(dname,st) != 0) return(False); ret = S_ISDIR(st->st_mode); if(!ret) errno = ENOTDIR; return ret; } /******************************************************************* returns the size in bytes of the named file ********************************************************************/ SMB_OFF_T get_file_size(char *file_name) { SMB_STRUCT_STAT buf; buf.st_size = 0; if(sys_stat(file_name,&buf) != 0) return (SMB_OFF_T)-1; return(buf.st_size); } /******************************************************************* return a string representing an attribute for a file ********************************************************************/ char *attrib_string(uint16 mode) { static fstring attrstr; attrstr[0] = 0; if (mode & aVOLID) fstrcat(attrstr,"V"); if (mode & aDIR) fstrcat(attrstr,"D"); if (mode & aARCH) fstrcat(attrstr,"A"); if (mode & aHIDDEN) fstrcat(attrstr,"H"); if (mode & aSYSTEM) fstrcat(attrstr,"S"); if (mode & aRONLY) fstrcat(attrstr,"R"); return(attrstr); } /******************************************************************* show a smb message structure ********************************************************************/ void show_msg(char *buf) { int i; int bcc=0; if (DEBUGLEVEL < 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))); DEBUG(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\nsmt_wct=%d\n", (int)SVAL(buf,smb_tid), (int)SVAL(buf,smb_pid), (int)SVAL(buf,smb_uid), (int)SVAL(buf,smb_mid), (int)CVAL(buf,smb_wct))); for (i=0;i<(int)CVAL(buf,smb_wct);i++) { DEBUG(5,("smb_vwv[%d]=%d (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))); DEBUG(5,("smb_bcc=%d\n",bcc)); if (DEBUGLEVEL < 10) return; if (DEBUGLEVEL < 50) { bcc = MIN(bcc, 512); } dump_data(10, smb_buf(buf), bcc); } /******************************************************************* set the length and marker of an smb packet ********************************************************************/ void smb_setlen(char *buf,int len) { _smb_setlen(buf,len); SCVAL(buf,4,0xFF); SCVAL(buf,5,'S'); SCVAL(buf,6,'M'); SCVAL(buf,7,'B'); } /******************************************************************* setup the word count and byte count for a smb message ********************************************************************/ int set_message(char *buf,int num_words,int num_bytes,BOOL zero) { if (zero) memset(buf + smb_size,'\0',num_words*2 + num_bytes); SCVAL(buf,smb_wct,num_words); 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); } /******************************************************************* 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); } /******************************************************************* setup only the byte count for a smb message, using the end of the message as a marker ********************************************************************/ int set_message_end(void *outbuf,void *end_ptr) { return set_message_bcc((char *)outbuf,PTR_DIFF(end_ptr,smb_buf((char *)outbuf))); } /******************************************************************* reduce a file name, removing .. elements. ********************************************************************/ void dos_clean_name(char *s) { char *p=NULL; DEBUG(3,("dos_clean_name [%s]\n",s)); /* remove any double slashes */ all_string_sub(s, "\\\\", "\\", 0); while ((p = strstr(s,"\\..\\")) != NULL) { pstring s1; *p = 0; pstrcpy(s1,p+3); if ((p=strrchr_m(s,'\\')) != NULL) *p = 0; else *s = 0; pstrcat(s,s1); } trim_string(s,NULL,"\\.."); all_string_sub(s, "\\.\\", "\\", 0); } /******************************************************************* reduce a file name, removing .. elements. ********************************************************************/ void unix_clean_name(char *s) { char *p=NULL; DEBUG(3,("unix_clean_name [%s]\n",s)); /* remove any double slashes */ all_string_sub(s, "//","/", 0); /* Remove leading ./ characters */ if(strncmp(s, "./", 2) == 0) { trim_string(s, "./", NULL); if(*s == 0) pstrcpy(s,"./"); } while ((p = strstr(s,"/../")) != NULL) { pstring s1; *p = 0; pstrcpy(s1,p+3); if ((p=strrchr_m(s,'/')) != NULL) *p = 0; else *s = 0; pstrcat(s,s1); } trim_string(s,NULL,"/.."); } /******************************************************************* convert '\' to '/' reduce a file name, removing or reducing /../ , /./ , // elements. remove also any trailing . and / return a new allocated string. ********************************************************************/ smb_ucs2_t *unix_clean_path(const smb_ucs2_t *s) { smb_ucs2_t *ns; smb_ucs2_t *p, *r, *t; DEBUG(3, ("unix_clean_path\n")); /* [%unicode]\n")); */ /* convert '\' to '/' */ ns = strdup_w(s); if (!ns) return NULL; unix_format_w(ns); /* remove all double slashes */ p = ns; ns = all_string_sub_wa(p, "//", "/"); SAFE_FREE(p); if (!ns) return NULL; /* remove any /./ */ p = ns; ns = all_string_sub_wa(p, "/./", "/"); SAFE_FREE(p); if (!ns) return NULL; /* reduce any /../ */ t = ns; while ((r = strstr_wa(t, "/.."))) { t = &(r[3]); if (*t == UCS2_CHAR('/') || *t == 0) { *r = 0; p = strrchr_w(ns, UCS2_CHAR('/')); if (!p) p = ns; memmove(p, t, (strlen_w(t) + 1) * sizeof(smb_ucs2_t)); t = p; } } /* remove any trailing /. */ trim_string_wa(ns, NULL, "/."); /* remove any leading and trailing / */ trim_string_wa(ns, "/", "/"); return ns; } /**************************************************************************** make a dir struct ****************************************************************************/ void make_dir_struct(char *buf,char *mask,char *fname,SMB_OFF_T size,int mode,time_t date) { char *p; pstring mask2; pstrcpy(mask2,mask); if ((mode & aDIR) != 0) size = 0; memset(buf+1,' ',11); if ((p = strchr_m(mask2,'.')) != NULL) { *p = 0; push_ascii(buf+1,mask2,8, 0); push_ascii(buf+9,p+1,3, 0); *p = '.'; } else push_ascii(buf+1,mask2,11, 0); memset(buf+21,'\0',DIR_STRUCT_SIZE-21); SCVAL(buf,21,mode); put_dos_date(buf,22,date); SSVAL(buf,26,size & 0xFFFF); SSVAL(buf,28,(size >> 16)&0xFFFF); push_ascii(buf+30,fname,12, 0); if (!case_sensitive) strupper(buf+30); DEBUG(8,("put name [%s] from [%s] into dir struct\n",buf+30, fname)); } /******************************************************************* close the low 3 fd's and open dev/null in their place ********************************************************************/ void close_low_fds(void) { int fd; int i; close(0); close(1); #ifndef __INSURE__ close(2); #endif /* try and use up these file descriptors, so silly library routines writing to stdout etc won't cause havoc */ for (i=0;i<3;i++) { fd = sys_open("/dev/null",O_RDWR,0); if (fd < 0) fd = sys_open("/dev/null",O_WRONLY,0); if (fd < 0) { DEBUG(0,("Can't open /dev/null\n")); return; } if (fd != i) { DEBUG(0,("Didn't get file descriptor %d\n",i)); return; } } } /**************************************************************************** Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available, else if SYSV use O_NDELAY if BSD use FNDELAY ****************************************************************************/ int set_blocking(int fd, BOOL set) { int val; #ifdef O_NONBLOCK #define FLAG_TO_SET O_NONBLOCK #else #ifdef SYSV #define FLAG_TO_SET O_NDELAY #else /* BSD */ #define FLAG_TO_SET FNDELAY #endif #endif if((val = fcntl(fd, F_GETFL, 0)) == -1) return -1; if(set) /* Turn blocking on - ie. clear nonblock flag */ val &= ~FLAG_TO_SET; else val |= FLAG_TO_SET; return fcntl( fd, F_SETFL, val); #undef FLAG_TO_SET } /**************************************************************************** Transfer some data between two fd's. ****************************************************************************/ #ifndef TRANSFER_BUF_SIZE #define TRANSFER_BUF_SIZE 65536 #endif ssize_t transfer_file_internal(int infd, int outfd, size_t n, ssize_t (*read_fn)(int, void *, size_t), ssize_t (*write_fn)(int, const void *, size_t)) { char *buf; size_t total = 0; ssize_t read_ret; ssize_t write_ret; size_t num_to_read_thistime; size_t num_written = 0; if ((buf = malloc(TRANSFER_BUF_SIZE)) == NULL) return -1; while (total < n) { num_to_read_thistime = MIN((n - total), TRANSFER_BUF_SIZE); read_ret = (*read_fn)(infd, buf, num_to_read_thistime); if (read_ret == -1) { DEBUG(0,("transfer_file_internal: read failure. Error = %s\n", strerror(errno) )); SAFE_FREE(buf); return -1; } if (read_ret == 0) break; num_written = 0; while (num_written < read_ret) { write_ret = (*write_fn)(outfd,buf + num_written, read_ret - num_written); if (write_ret == -1) { DEBUG(0,("transfer_file_internal: write failure. Error = %s\n", strerror(errno) )); SAFE_FREE(buf); return -1; } if (write_ret == 0) return (ssize_t)total; num_written += (size_t)write_ret; } total += (size_t)read_ret; } SAFE_FREE(buf); return (ssize_t)total; } SMB_OFF_T transfer_file(int infd,int outfd,SMB_OFF_T n) { return (SMB_OFF_T)transfer_file_internal(infd, outfd, (size_t)n, read, write); } /******************************************************************* Sleep for a specified number of milliseconds. ********************************************************************/ void msleep(int t) { int tdiff=0; struct timeval tval,t1,t2; fd_set fds; GetTimeOfDay(&t1); GetTimeOfDay(&t2); while (tdiff < t) { tval.tv_sec = (t-tdiff)/1000; tval.tv_usec = 1000*((t-tdiff)%1000); FD_ZERO(&fds); errno = 0; sys_select_intr(0,&fds,&tval); GetTimeOfDay(&t2); tdiff = TvalDiff(&t1,&t2); } } /**************************************************************************** Become a daemon, discarding the controlling terminal. ****************************************************************************/ void become_daemon(void) { if (sys_fork()) { _exit(0); } /* detach from the terminal */ #ifdef HAVE_SETSID setsid(); #elif defined(TIOCNOTTY) { int i = sys_open("/dev/tty", O_RDWR, 0); if (i != -1) { ioctl(i, (int) TIOCNOTTY, (char *)0); close(i); } } #endif /* HAVE_SETSID */ /* Close fd's 0,1,2. Needed if started by rsh */ close_low_fds(); } /**************************************************************************** put up a yes/no prompt ****************************************************************************/ BOOL yesno(char *p) { pstring ans; printf("%s",p); if (!fgets(ans,sizeof(ans)-1,stdin)) return(False); if (*ans == 'y' || *ans == 'Y') return(True); return(False); } /**************************************************************************** Expand a pointer to be a particular size. ****************************************************************************/ void *Realloc(void *p,size_t size) { void *ret=NULL; if (size == 0) { SAFE_FREE(p); DEBUG(5,("Realloc asked for 0 bytes\n")); return NULL; } if (!p) ret = (void *)malloc(size); else ret = (void *)realloc(p,size); if (!ret) DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size)); return(ret); } /**************************************************************************** Free memory, checks for NULL. use directly SAFE_FREE() exist only because we need to pass a function pointer somewhere --SSS ****************************************************************************/ void safe_free(void *p) { SAFE_FREE(p); } /**************************************************************************** Get my own name and IP. ****************************************************************************/ BOOL get_myname(char *my_name) { pstring hostname; *hostname = 0; /* get my host name */ if (gethostname(hostname, sizeof(hostname)) == -1) { DEBUG(0,("gethostname failed\n")); return False; } /* Ensure null termination. */ hostname[sizeof(hostname)-1] = '\0'; if (my_name) { /* split off any parts after an initial . */ char *p = strchr_m(hostname,'.'); if (p) *p = 0; fstrcpy(my_name,hostname); } return(True); } /**************************************************************************** Interpret a protocol description string, with a default. ****************************************************************************/ int interpret_protocol(char *str,int def) { if (strequal(str,"NT1")) return(PROTOCOL_NT1); if (strequal(str,"LANMAN2")) return(PROTOCOL_LANMAN2); if (strequal(str,"LANMAN1")) return(PROTOCOL_LANMAN1); if (strequal(str,"CORE")) return(PROTOCOL_CORE); if (strequal(str,"COREPLUS")) return(PROTOCOL_COREPLUS); if (strequal(str,"CORE+")) return(PROTOCOL_COREPLUS); DEBUG(0,("Unrecognised protocol level %s\n",str)); return(def); } /**************************************************************************** Return true if a string could be a pure IP address. ****************************************************************************/ BOOL is_ipaddress(const char *str) { BOOL pure_address = True; int i; for (i=0; pure_address && str[i]; i++) if (!(isdigit((int)str[i]) || str[i] == '.')) pure_address = False; /* Check that a pure number is not misinterpreted as an IP */ pure_address = pure_address && (strchr_m(str, '.') != NULL); return pure_address; } /**************************************************************************** interpret an internet address or name into an IP address in 4 byte form ****************************************************************************/ uint32 interpret_addr(const char *str) { struct hostent *hp; uint32 res; if (strcmp(str,"0.0.0.0") == 0) return(0); if (strcmp(str,"255.255.255.255") == 0) return(0xFFFFFFFF); /* if it's in the form of an IP address then get the lib to interpret it */ if (is_ipaddress(str)) { res = inet_addr(str); } else { /* otherwise assume it's a network name of some sort and use sys_gethostbyname */ if ((hp = sys_gethostbyname(str)) == 0) { DEBUG(3,("sys_gethostbyname: Unknown host. %s\n",str)); return 0; } if(hp->h_addr == NULL) { DEBUG(3,("sys_gethostbyname: host address is invalid for host %s\n",str)); return 0; } putip((char *)&res,(char *)hp->h_addr); } if (res == (uint32)-1) return(0); return(res); } /******************************************************************* a convenient addition to interpret_addr() ******************************************************************/ struct in_addr *interpret_addr2(const char *str) { static struct in_addr ret; uint32 a = interpret_addr(str); ret.s_addr = a; return(&ret); } /******************************************************************* check if an IP is the 0.0.0.0 ******************************************************************/ BOOL is_zero_ip(struct in_addr ip) { uint32 a; putip((char *)&a,(char *)&ip); return(a == 0); } /* Set an IP to 0.0.0.0 */ void zero_ip(struct in_addr *ip) { static BOOL init; static struct in_addr ipzero; if (!init) { ipzero = *interpret_addr2("0.0.0.0"); init = True; } *ip = ipzero; } #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT)) /****************************************************************** Remove any mount options such as -rsize=2048,wsize=2048 etc. Based on a fix from . *******************************************************************/ static void strip_mount_options( pstring *str) { if (**str == '-') { char *p = *str; while(*p && !isspace(*p)) p++; while(*p && isspace(*p)) p++; if(*p) { pstring tmp_str; pstrcpy(tmp_str, p); pstrcpy(*str, tmp_str); } } } /******************************************************************* Patch from jkf@soton.ac.uk Split Luke's automount_server into YP lookup and string splitter so can easily implement automount_path(). As we may end up doing both, cache the last YP result. *******************************************************************/ #ifdef WITH_NISPLUS_HOME char *automount_lookup(const char *user_name) { static fstring last_key = ""; static pstring last_value = ""; char *nis_map = (char *)lp_nis_home_map_name(); char buffer[NIS_MAXATTRVAL + 1]; nis_result *result; nis_object *object; entry_obj *entry; if (strcmp(user_name, last_key)) { slprintf(buffer, sizeof(buffer)-1, "[key=%s],%s", user_name, nis_map); DEBUG(5, ("NIS+ querystring: %s\n", buffer)); if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) { if (result->status != NIS_SUCCESS) { DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status))); fstrcpy(last_key, ""); pstrcpy(last_value, ""); } else { object = result->objects.objects_val; if (object->zo_data.zo_type == ENTRY_OBJ) { entry = &object->zo_data.objdata_u.en_data; DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type)); DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val)); pstrcpy(last_value, entry->en_cols.en_cols_val[1].ec_value.ec_value_val); pstring_sub(last_value, "&", user_name); fstrcpy(last_key, user_name); } } } nis_freeresult(result); } strip_mount_options(&last_value); DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n", user_name, last_value)); return last_value; } #else /* WITH_NISPLUS_HOME */ char *automount_lookup(const char *user_name) { static fstring last_key = ""; static pstring last_value = ""; int nis_error; /* returned by yp all functions */ char *nis_result; /* yp_match inits this */ int nis_result_len; /* and set this */ char *nis_domain; /* yp_get_default_domain inits this */ char *nis_map = (char *)lp_nis_home_map_name(); if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) { DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error))); return last_value; } DEBUG(5, ("NIS Domain: %s\n", nis_domain)); if (!strcmp(user_name, last_key)) { nis_result = last_value; nis_result_len = strlen(last_value); nis_error = 0; } else { if ((nis_error = yp_match(nis_domain, nis_map, user_name, strlen(user_name), &nis_result, &nis_result_len)) == 0) { if (!nis_error && nis_result_len >= sizeof(pstring)) { nis_result_len = sizeof(pstring)-1; } fstrcpy(last_key, user_name); strncpy(last_value, nis_result, nis_result_len); last_value[nis_result_len] = '\0'; strip_mount_options(&last_value); } else if(nis_error == YPERR_KEY) { /* If Key lookup fails user home server is not in nis_map use default information for server, and home directory */ last_value[0] = 0; DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n", user_name, nis_map)); DEBUG(3, ("using defaults for server and home directory\n")); } else { DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n", yperr_string(nis_error), user_name, nis_map)); } } DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, last_value)); return last_value; } #endif /* WITH_NISPLUS_HOME */ #endif /******************************************************************* are two IPs on the same subnet? ********************************************************************/ BOOL same_net(struct in_addr ip1,struct in_addr ip2,struct in_addr mask) { uint32 net1,net2,nmask; nmask = ntohl(mask.s_addr); net1 = ntohl(ip1.s_addr); net2 = ntohl(ip2.s_addr); return((net1 & nmask) == (net2 & nmask)); } /**************************************************************************** check if a process exists. Does this work on all unixes? ****************************************************************************/ BOOL process_exists(pid_t pid) { return(kill(pid,0) == 0 || errno != ESRCH); } /******************************************************************* Convert a uid into a user name. ********************************************************************/ char *uidtoname(uid_t uid) { static fstring name; struct passwd *pass; if (winbind_uidtoname(name, uid)) return name; pass = sys_getpwuid(uid); if (pass) return(pass->pw_name); slprintf(name, sizeof(name) - 1, "%d",(int)uid); return(name); } /******************************************************************* Convert a gid into a group name. ********************************************************************/ char *gidtoname(gid_t gid) { static fstring name; struct group *grp; if (winbind_gidtoname(name, gid)) return name; grp = getgrgid(gid); if (grp) return(grp->gr_name); slprintf(name,sizeof(name) - 1, "%d",(int)gid); return(name); } /******************************************************************* Convert a user name into a uid. If winbindd is present uses this. ********************************************************************/ uid_t nametouid(char *name) { struct passwd *pass; char *p; uid_t u; u = (uid_t)strtol(name, &p, 0); if ((p != name) && (*p == '\0')) return u; if (winbind_nametouid(&u, name)) return u; pass = sys_getpwnam(name); if (pass) return(pass->pw_uid); return (uid_t)-1; } /******************************************************************* Convert a name to a gid_t if possible. Return -1 if not a group. If winbindd is present does a shortcut lookup... ********************************************************************/ 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; if (winbind_nametogid(&g, name)) return g; grp = getgrnam(name); if (grp) return(grp->gr_gid); return (gid_t)-1; } /******************************************************************* something really nasty happened - panic! ********************************************************************/ void smb_panic(char *why) { char *cmd = lp_panic_action(); if (cmd && *cmd) { system(cmd); } DEBUG(0,("PANIC: %s\n", why)); dbgflush(); abort(); } /******************************************************************* a readdir wrapper which just returns the file name ********************************************************************/ char *readdirname(DIR *p) { SMB_STRUCT_DIRENT *ptr; char *dname; if (!p) return(NULL); ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p); if (!ptr) return(NULL); dname = ptr->d_name; #ifdef NEXT2 if (telldir(p) < 0) return(NULL); #endif #ifdef HAVE_BROKEN_READDIR /* using /usr/ucb/cc is BAD */ dname = dname - 2; #endif { static pstring buf; int len = NAMLEN(ptr); memcpy(buf, dname, len); buf[len] = 0; dname = buf; } return(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(char *name, name_compare_entry *namelist) { pstring last_component; char *p; DEBUG(8, ("is_in_path: %s\n", name)); /* if we have no list it's obviously not in the path */ if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) { DEBUG(8,("is_in_path: no name list.\n")); return False; } /* Get the last component of the unix name. */ p = strrchr_m(name, '/'); strncpy(last_component, p ? ++p : name, sizeof(last_component)-1); last_component[sizeof(last_component)-1] = '\0'; 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(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(). namelist is modified here and is assumed to be a copy owned by the caller. 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, char *namelist) { char *name_end; char *nameptr = namelist; int num_entries = 0; int i; (*ppname_array) = NULL; if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0'))) return; /* We need to make two passes over the string. The first to count the number of elements, the second to split it. */ while(*nameptr) { if ( *nameptr == '/' ) { /* cope with multiple (useless) /s) */ nameptr++; continue; } /* find the next / */ name_end = strchr_m(nameptr, '/'); /* oops - the last check for a / didn't find one. */ if (name_end == NULL) break; /* next segment please */ nameptr = name_end + 1; num_entries++; } if(num_entries == 0) return; if(( (*ppname_array) = (name_compare_entry *)malloc( (num_entries + 1) * sizeof(name_compare_entry))) == NULL) { DEBUG(0,("set_namearray: malloc fail\n")); return; } /* Now copy out the names */ nameptr = namelist; i = 0; while(*nameptr) { if ( *nameptr == '/' ) { /* cope with multiple (useless) /s) */ nameptr++; continue; } /* find the next / */ if ((name_end = strchr_m(nameptr, '/')) != NULL) { *name_end = 0; } /* oops - the last check for a / didn't find one. */ if(name_end == NULL) break; (*ppname_array)[i].is_wild = ms_has_wild(nameptr); if(((*ppname_array)[i].name = strdup(nameptr)) == NULL) { DEBUG(0,("set_namearray: malloc fail (1)\n")); return; } /* next segment please */ nameptr = name_end + 1; i++; } (*ppname_array)[i].name = NULL; return; } /**************************************************************************** routine to free a namearray. ****************************************************************************/ void free_namearray(name_compare_entry *name_array) { if(name_array == NULL) return; SAFE_FREE(name_array->name); SAFE_FREE(name_array); } /**************************************************************************** Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping is dealt with in posix.c ****************************************************************************/ BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type) { SMB_STRUCT_FLOCK lock; int ret; DEBUG(8,("fcntl_lock %d %d %.0f %.0f %d\n",fd,op,(double)offset,(double)count,type)); lock.l_type = type; lock.l_whence = SEEK_SET; lock.l_start = offset; lock.l_len = count; lock.l_pid = 0; errno = 0; ret = fcntl(fd,op,&lock); if (errno != 0) DEBUG(3,("fcntl_lock: fcntl lock gave errno %d (%s)\n",errno,strerror(errno))); /* a lock query */ if (op == SMB_F_GETLK) { if ((ret != -1) && (lock.l_type != F_UNLCK) && (lock.l_pid != 0) && (lock.l_pid != sys_getpid())) { DEBUG(3,("fcntl_lock: fd %d is locked by pid %d\n",fd,(int)lock.l_pid)); return(True); } /* it must be not locked or locked by me */ return(False); } /* a lock set or unset */ if (ret == -1) { DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n", (double)offset,(double)count,op,type,strerror(errno))); return(False); } /* everything went OK */ DEBUG(8,("fcntl_lock: Lock call successful\n")); return(True); } /******************************************************************* is the name specified one of my netbios names returns true is it is equal, false otherwise ********************************************************************/ BOOL is_myname(char *s) { int n; BOOL ret = False; for (n=0; my_netbios_names[n]; n++) { if (strequal(my_netbios_names[n], s)) ret=True; } DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret)); return(ret); } BOOL is_myname_or_ipaddr(char *s) { char **ptr; /* optimize for the common case */ if (strequal(s, global_myname)) return True; /* maybe its an IP address? */ if (is_ipaddress(s)) { struct iface_struct nics[MAX_INTERFACES]; int i, n; uint32 ip; ip = interpret_addr(s); if ((ip==0) || (ip==0xffffffff)) return False; n = get_interfaces(nics, MAX_INTERFACES); for (i=0; i(per_line/2)) fprintf(f, " "); while (n--) { fprintf(f, " "); } n = MIN(per_line/2,i%per_line); out_ascii(f,&buf[i-(i%per_line)],n); fprintf(f, " "); n = (i%per_line) - n; if (n>0) out_ascii(f,&buf[i-n],n); fprintf(f, "\n"); } } void print_asc(int level, const unsigned char *buf,int len) { int i; for (i=0;i8) DEBUG(level,(" ")); while (n--) DEBUG(level,(" ")); n = MIN(8,i%16); print_asc(level,&buf[i-(i%16)],n); DEBUG(level,(" ")); n = (i%16) - n; if (n>0) print_asc(level,&buf[i-n],n); DEBUG(level,("\n")); } } char *tab_depth(int depth) { static pstring spaces; memset(spaces, ' ', depth * 4); spaces[depth * 4] = 0; return spaces; } /***************************************************************************** * 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) { int res = 0; int c; int i=0; while(*s) { c = *s; res ^= (c << (i % 15)) ^ (c >> (15-(i%15))); s++; i++; } return(res); } /* str_checksum */ /***************************************************************** 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 } /***************************************************************** splits out the start of the key (HKLM or HKU) and the rest of the key *****************************************************************/ BOOL reg_split_key(char *full_keyname, uint32 *reg_type, char *key_name) { pstring tmp; if (!next_token(&full_keyname, tmp, "\\", sizeof(tmp))) { return False; } (*reg_type) = 0; DEBUG(10, ("reg_split_key: hive %s\n", tmp)); if (strequal(tmp, "HKLM") || strequal(tmp, "HKEY_LOCAL_MACHINE")) { (*reg_type) = HKEY_LOCAL_MACHINE; } else if (strequal(tmp, "HKU") || strequal(tmp, "HKEY_USERS")) { (*reg_type) = HKEY_USERS; } else { DEBUG(10,("reg_split_key: unrecognised hive key %s\n", tmp)); return False; } if (next_token(&full_keyname, tmp, "\n\r", sizeof(tmp))) { fstrcpy(key_name, tmp); } else { key_name[0] = 0; } DEBUG(10, ("reg_split_key: name %s\n", key_name)); return True; } /***************************************************************** possibly replace mkstemp if it is broken *****************************************************************/ int smb_mkstemp(char *template) { #if HAVE_SECURE_MKSTEMP return mkstemp(template); #else /* have a reasonable go at emulating it. Hope that the system mktemp() isn't completly hopeless */ char *p = mktemp(template); if (!p) return -1; return open(p, O_CREAT|O_EXCL|O_RDWR, 0600); #endif } /** malloc that aborts with smb_panic on fail or zero size. **/ void *smb_xmalloc(size_t size) { void *p; if (size == 0) smb_panic("smb_xmalloc: called with zero size.\n"); if ((p = malloc(size)) == NULL) smb_panic("smb_xmalloc: malloc fail.\n"); return p; } /** Memdup with smb_panic on fail. **/ void *smb_xmemdup(const void *p, size_t size) { void *p2; p2 = smb_xmalloc(size); memcpy(p2, p, size); return p2; } /** strdup that aborts on malloc fail. **/ char *smb_xstrdup(const char *s) { char *s1 = strdup(s); if (!s1) smb_panic("smb_xstrdup: malloc fail\n"); return s1; } /* vasprintf that aborts on malloc fail */ int smb_xvasprintf(char **ptr, const char *format, va_list ap) { int n; n = vasprintf(ptr, format, ap); if (n == -1 || ! *ptr) { smb_panic("smb_xvasprintf: out of memory"); } return n; } /***************************************************************** like strdup but for memory *****************************************************************/ void *memdup(const void *p, size_t size) { void *p2; if (size == 0) return NULL; p2 = malloc(size); if (!p2) return NULL; memcpy(p2, p, size); return p2; } /***************************************************************** get local hostname and cache result *****************************************************************/ char *myhostname(void) { static pstring ret; if (ret[0] == 0) { get_myname(ret); } return ret; } /***************************************************************** a useful function for returning a path in the Samba lock directory *****************************************************************/ char *lock_path(char *name) { static pstring fname; pstrcpy(fname,lp_lockdir()); trim_string(fname,"","/"); if (!directory_exist(fname,NULL)) { mkdir(fname,0755); } pstrcat(fname,"/"); pstrcat(fname,name); return fname; } /** * @brief Returns an absolute path to a file in the Samba lib directory. * * @param name File to find, relative to LIBDIR. * * @retval Pointer to a static #pstring containing the full path. **/ char *lib_path(char *name) { static pstring fname; snprintf(fname, sizeof(fname), "%s/%s", dyn_LIBDIR, name); return fname; } /******************************************************************* Given a filename - get its directory name NB: Returned in static storage. Caveats: o Not safe in thread environment. o Caller must not free. o If caller wishes to preserve, they should copy. ********************************************************************/ char *parent_dirname(const char *path) { static pstring dirpath; char *p; if (!path) return(NULL); pstrcpy(dirpath, path); p = strrchr_m(dirpath, '/'); /* Find final '/', if any */ if (!p) { pstrcpy(dirpath, "."); /* No final "/", so dir is "." */ } else { if (p == dirpath) ++p; /* For root "/", leave "/" in place */ *p = '\0'; } return dirpath; } /******************************************************************* determine if a pattern contains any Microsoft wildcard characters *******************************************************************/ BOOL ms_has_wild(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; 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(char *string, char *pattern, BOOL is_case_sensitive) { fstring p2, s2; if (strcmp(string,"..") == 0) string = "."; if (strcmp(pattern,".") == 0) return False; if (is_case_sensitive) { return ms_fnmatch(pattern, string, Protocol) == 0; } fstrcpy(p2, pattern); fstrcpy(s2, string); strlower(p2); strlower(s2); return ms_fnmatch(p2, s2, Protocol) == 0; } /********************************************************* Recursive routine that is called by unix_wild_match. *********************************************************/ static BOOL unix_do_match(char *regexp, char *str) { char *p; for( p = regexp; *p && *str; ) { switch(*p) { case '?': str++; p++; break; case '*': /* * Look for a character matching * the one after the '*'. */ p++; if(!*p) return True; /* Automatic match */ while(*str) { while(*str && (*p != *str)) str++; /* * Patch from weidel@multichart.de. In the case of the regexp * '*XX*' we want to ensure there are at least 2 'X' characters * in the string after the '*' for a match to be made. */ { int matchcount=0; /* * Eat all the characters that match, but count how many there were. */ while(*str && (*p == *str)) { str++; matchcount++; } /* * Now check that if the regexp had n identical characters that * matchcount had at least that many matches. */ while ( *(p+1) && (*(p+1) == *p)) { p++; matchcount--; } if ( matchcount <= 0 ) return False; } str--; /* We've eaten the match char after the '*' */ if(unix_do_match(p, str)) return True; if(!*str) return False; else str++; } return False; default: if(*str != *p) return False; str++; p++; break; } } if(!*p && !*str) return True; if (!*p && str[0] == '.' && str[1] == 0) return(True); if (!*str && *p == '?') { while (*p == '?') p++; return(!*p); } if(!*str && (*p == '*' && p[1] == '\0')) return True; return False; } /******************************************************************* Simple case insensitive interface to a UNIX wildcard matcher. *******************************************************************/ BOOL unix_wild_match(char *pattern, char *string) { pstring p2, s2; char *p; pstrcpy(p2, pattern); pstrcpy(s2, string); strlower(p2); strlower(s2); /* Remove any *? and ** from the pattern as they are meaningless */ for(p = p2; *p; p++) while( *p == '*' && (p[1] == '?' ||p[1] == '*')) pstrcpy( &p[1], &p[2]); if (strequal(p2,"*")) return True; return unix_do_match(p2, s2) == 0; } /******************************************************************* free() a data blob *******************************************************************/ static void free_data_blob(DATA_BLOB *d) { if ((d) && (d->free)) { SAFE_FREE(d->data); } } /******************************************************************* construct a data blob, must be freed with data_blob_free() you can pass NULL for p and get a blank data blob *******************************************************************/ DATA_BLOB data_blob(const void *p, size_t length) { DATA_BLOB ret; if (!length) { ZERO_STRUCT(ret); return ret; } if (p) { ret.data = smb_xmemdup(p, length); } else { ret.data = smb_xmalloc(length); } ret.length = length; ret.free = free_data_blob; return ret; } /******************************************************************* construct a data blob, using supplied TALLOC_CTX *******************************************************************/ DATA_BLOB data_blob_talloc(TALLOC_CTX *mem_ctx, const void *p, size_t length) { DATA_BLOB ret; if (!p || !length) { ZERO_STRUCT(ret); return ret; } ret.data = talloc_memdup(mem_ctx, p, length); if (ret.data == NULL) smb_panic("data_blob_talloc: talloc_memdup failed.\n"); ret.length = length; ret.free = NULL; return ret; } /******************************************************************* free a data blob *******************************************************************/ void data_blob_free(DATA_BLOB *d) { if (d) { if (d->free) { (d->free)(d); } ZERO_STRUCTP(d); } } /******************************************************************* clear a DATA_BLOB's contents *******************************************************************/ void data_blob_clear(DATA_BLOB *d) { if (d->data) { memset(d->data, 0, d->length); } } /******************************************************************* free a data blob and clear its contents *******************************************************************/ void data_blob_clear_free(DATA_BLOB *d) { data_blob_clear(d); data_blob_free(d); } #ifdef __INSURE__ /******************************************************************* This routine is a trick to immediately catch errors when debugging with insure. A xterm with a gdb is popped up when insure catches a error. It is Linux specific. ********************************************************************/ int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6) { static int (*fn)(); int ret; char pidstr[10]; /* you can get /usr/bin/backtrace from http://samba.org/ftp/unpacked/junkcode/backtrace */ pstring cmd = "/usr/bin/backtrace %d"; slprintf(pidstr, sizeof(pidstr)-1, "%d", sys_getpid()); pstring_sub(cmd, "%d", pidstr); if (!fn) { static void *h; h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY); fn = dlsym(h, "_Insure_trap_error"); } ret = fn(a1, a2, a3, a4, a5, a6); system(cmd); return ret; } #endif