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/*
* Copyright (C) 1994-2003 by CERN/IT/ADC/CA
* All rights reserved
*/
#ifndef lint
static char sccsid[] = "@(#)$RCSfile: getuser.c,v $ $Revision: 1.1 $ $Date: 2005/03/29 09:27:19 $ CERN IT/ADC/CA Jean-Damien Durand";
#endif /* not lint */
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <pwd.h>
#include <Castor_limits.h>
#include <Cglobals.h>
#include <Cpwd.h>
#include <serrno.h>
#include <log.h>
#if defined(_WIN32)
char *getenv();
#endif
#ifndef MAPPING_FILE
#if defined(_WIN32)
#define MAPPING_FILE "%SystemRoot%\\system32\\drivers\\etc\\users.ext"
#else
#define MAPPING_FILE "/etc/ext.users"
#endif /* _WIN32 */
#endif
#if defined(_WIN32)
/*
* infile will be modified at runtime when %SystemRoot% is
* resolved. Must reserv enough space to hold new pathname.
*/
static char infile[CA_MAXPATHLEN+1] = MAPPING_FILE;
#else
static char *infile = MAPPING_FILE;
#endif /* WIN32 */
#ifndef _WIN32
#if defined(_REENTRANT) || defined(_THREAD_SAFE)
#define strtok(X,Y) strtok_r(X,Y,&last)
#endif /* _REENTRANT || _THREAD_SAFE */
#endif
/*
* function finds the corresponding entry in the
* mapping table;
* returns 0 if entry was found
* 1 on error (errno is set)
* -1 if entry was not found
*/
int DLL_DECL get_user(from_node,from_user,from_uid,from_gid,to_user,to_uid,to_gid)
char *from_node;
char *from_user;
int from_uid;
int from_gid;
char *to_user;
int *to_uid ;
int *to_gid ;
{
char *p ;
struct passwd *pw ;
FILE *fsin ;
int uid,gid ;
char buf[BUFSIZ+1] ;
char maphostnam[CA_MAXHOSTNAMELEN+1];
char mapuser[CA_MAXUSRNAMELEN+1] ;
char mapuid[6] ;
char mapgid[6] ;
int counter ;
#if defined(_WIN32)
char path[CA_MAXPATHLEN+1];
#endif
#if defined(_REENTRANT) || defined(_THREAD_SAFE)
char *last = NULL;
#endif /* _REENTRANT || _THREAD_SAFE */
#if defined(_WIN32)
strcpy(path, infile);
if( (strncmp(path, "%SystemRoot%\\", 13) == 0) && ((p = getenv ("SystemRoot")) != NULL) ) {
sprintf(infile, "%s\\%s", p, strchr (path, '\\'));
}
#endif
if ( (fsin=fopen(infile,"r"))==NULL ) {
log(LOG_ERR, "Could not open file %s, errno %d\n", infile, errno);
serrno = ENOENT;
return -ENOENT ;
}
while( fgets(buf,BUFSIZ,fsin)!=NULL ) {
if ( buf[0] == '#') continue ;
if ( ( p = strrchr( buf,'\n') ) != NULL ) *p='\0' ;
log(LOG_DEBUG,"Entry >%s< in %s\n",buf,infile) ;
p = strtok( buf, " \t");
if ( p != NULL ) strcpy (maphostnam, p) ;
else continue ;
p = strtok( NULL, " \t");
if ( p != NULL ) strcpy (mapuser, p) ;
else continue ;
p = strtok( NULL, " \t");
if ( p != NULL ) strcpy (mapuid, p);
else continue ;
p = strtok( NULL, " \t");
if ( p != NULL ) strcpy (mapgid, p);
else continue ;
p = strtok( NULL, " \t");
if ( p != NULL ) strcpy (to_user,p);
else continue ;
/* Checking maphostnam */
counter = 0 ;
if ( strcmp( maphostnam, from_node) &&
!( (p=strchr(maphostnam,'*'))!= NULL && strstr(from_node,p+1) != NULL ) )
continue ;
if ( strcmp( mapuser , from_user ) && strcmp( mapuser ,"*" ) )
continue ;
if ( strcmp( mapuid, "*" ) && ( (uid=atoi(mapuid)) <= 0 || uid != from_uid ) )
continue ;
if ( strcmp( mapgid, "*" ) && ( (gid=atoi(mapgid)) <= 0 || gid != from_gid ) )
continue ;
log( LOG_DEBUG,"Found a possible entry: %s\n",to_user);
if ( (pw = Cgetpwnam(to_user))==NULL) {
log(LOG_INFO,"Cgetpwnam(): %s\n",sstrerror(serrno));
continue ;
} else {
*to_uid = pw->pw_uid;
*to_gid = pw->pw_gid;
}
fclose( fsin ) ;
return 0 ;
}
fclose( fsin ) ;
serrno = ENOENT;
return -1 ;
}
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