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Diffstat (limited to 'source/lib/username.c')
| -rw-r--r-- | source/lib/username.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/source/lib/username.c b/source/lib/username.c new file mode 100644 index 00000000000..3d214fbbdab --- /dev/null +++ b/source/lib/username.c @@ -0,0 +1,246 @@ +/* + Unix SMB/Netbios implementation. + Version 1.9. + Username handling + Copyright (C) Andrew Tridgell 1992-1995 + + 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" +#include "loadparm.h" +extern int DEBUGLEVEL; + + +/**************************************************************************** +get a users home directory. tries as-is then lower case +****************************************************************************/ +char *get_home_dir(char *user) +{ + static struct passwd *pass; + + pass = Get_Pwnam(user,False); + + if (!pass) return(NULL); + return(pass->pw_dir); +} + + +/******************************************************************* +map a username from a dos name to a unix name by looking in the username +map +********************************************************************/ +void map_username(char *user) +{ + static int depth=0; + static BOOL initialised=False; + static fstring last_from,last_to; + FILE *f; + char *s; + char *mapfile = lp_username_map(); + if (!*mapfile || depth) return; + + if (!*user) return; + + if (!initialised) { + *last_from = *last_to = 0; + initialised = True; + } + + if (strequal(user,last_to)) return; + + if (strequal(user,last_from)) { + DEBUG(3,("Mapped user %s to %s\n",user,last_to)); + strcpy(user,last_to); + return; + } + + f = fopen(mapfile,"r"); + if (!f) { + DEBUG(0,("can't open username map %s\n",mapfile)); + return; + } + + DEBUG(4,("Scanning username map %s\n",mapfile)); + + depth++; + + for (; (s=fgets_slash(NULL,80,f)); free(s)) { + char *unixname = s; + char *dosname = strchr(unixname,'='); + + if (!dosname) continue; + *dosname++ = 0; + + while (isspace(*unixname)) unixname++; + if (!*unixname || strchr("#;",*unixname)) continue; + + { + int l = strlen(unixname); + while (l && isspace(unixname[l-1])) { + unixname[l-1] = 0; + l--; + } + } + + if (strchr(dosname,'*') || user_in_list(user,dosname)) { + DEBUG(3,("Mapped user %s to %s\n",user,unixname)); + StrnCpy(last_from,user,sizeof(last_from)-1); + sscanf(unixname,"%s",user); + StrnCpy(last_to,user,sizeof(last_to)-1); + } + } + + fclose(f); + + depth--; +} + +/**************************************************************************** +internals of Get_Pwnam wrapper +****************************************************************************/ +static struct passwd *_Get_Pwnam(char *s) +{ + struct passwd *ret; + + ret = getpwnam(s); + if (ret) + { +#ifdef GETPWANAM + struct passwd_adjunct *pwret; + pwret = getpwanam(s); + if (pwret) + { + free(ret->pw_passwd); + ret->pw_passwd = pwret->pwa_passwd; + } +#endif + + } + + return(ret); +} + + +/**************************************************************************** +a wrapper for getpwnam() that tries with all lower and all upper case +if the initial name fails. Also tried with first letter capitalised +Note that this changes user! +****************************************************************************/ +struct passwd *Get_Pwnam(char *user,BOOL allow_change) +{ + fstring user2; + + struct passwd *ret; + + if (!user || !(*user)) + return(NULL); + + StrnCpy(user2,user,sizeof(user2)-1); + + if (!allow_change) { + user = &user2[0]; + } + + map_username(user); + + ret = _Get_Pwnam(user); + if (ret) return(ret); + + strlower(user); + ret = _Get_Pwnam(user); + if (ret) return(ret); + + strupper(user); + ret = _Get_Pwnam(user); + if (ret) return(ret); + + /* try with first letter capitalised */ + if (strlen(user) > 1) + strlower(user+1); + ret = _Get_Pwnam(user); + if (ret) return(ret); + + if (allow_change) + strcpy(user,user2); + + return(NULL); +} + + +/**************************************************************************** +check if a user is in a user list +****************************************************************************/ +BOOL user_in_list(char *user,char *list) +{ + pstring tok; + char *p=list; + + while (next_token(&p,tok,LIST_SEP)) + { + if (strequal(user,tok)) + return(True); + +#ifdef NETGROUP + if (*tok == '@') + { + static char *mydomain = NULL; + if (mydomain == 0) + yp_get_default_domain(&mydomain); + + DEBUG(5,("looking for user %s of domain %s in netgroup %s\n", + user, mydomain, &tok[1])); + DEBUG(5,("innetgr is %s\n", + innetgr(&tok[1], (char *) 0, user, mydomain) + ? "TRUE" : "FALSE")); + + if (innetgr(&tok[1], (char *)0, user, mydomain)) + return (True); + } +#endif + + +#if HAVE_GETGRNAM + if (*tok == '@') + { + struct group *gptr; + char **member; + struct passwd *pass = Get_Pwnam(user,False); + + if (pass) { + gptr = getgrgid(pass->pw_gid); + if (gptr && strequal(gptr->gr_name,&tok[1])) + return(True); + } + + gptr = (struct group *)getgrnam(&tok[1]); + + if (gptr) + { + member = gptr->gr_mem; + while (member && *member) + { + if (strequal(*member,user)) + return(True); + member++; + } + } + } +#endif + } + return(False); +} + + |