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/*
* $Id: popen.c 3172 2010-02-15 08:51:54Z baud $
*/
/*
* Copyright (C) 1994-2010 by CERN/IT/PDP/DM
* All rights reserved
*/
#ifndef lint
static char sccsid[] = "@(#)$RCSfile: popen.c,v $ $Revision: 3172 $ $Date: 2010-02-15 09:51:54 +0100 (Mon, 15 Feb 2010) $ CERN/IT/PDP/DM Felix Hassine";
#endif /* not lint */
/* popen.c Remote pipe I/O - open file a file */
/*
* System remote file I/O
*/
#define RFIO_KERNEL 1
#include <fcntl.h>
#if defined(_WIN32)
#define MAXHOSTNAMELEN 64
#else
#include <sys/param.h> /* For MAXHOSTNAMELEN definition */
#endif
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64
#endif
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include "rfio.h"
#include "rfio_rfilefdt.h"
extern RFILE *rfilefdt[MAXRFD] ;
#if (defined(__osf__) && defined(__alpha)) || defined(_WIN32) || defined(linux)
extern char *cuserid();
#endif
#if defined(__APPLE__)
#include "Cpwd.h"
#endif
RFILE DLL_DECL *rfio_popen( rcom , type )
char * rcom ;
char *type ;
{
char *host ;
RFILE *rfp ;
int rfp_index;
char *p , *cp, *cp2 ;
char command[MAXCOMSIZ]; /* command with remote syntax */
char *uname ;
char *pcom ;
int rt ; /* daemon is in the site or remote ? */
int rcode, status = 0 ;
int len ;
FILE *file, *popen() ;
char localhost[MAXHOSTNAMELEN];
char buf[BUFSIZ] ;
#if defined(__APPLE__)
struct passwd *Cpw;
#endif
INIT_TRACE("RFIO_TRACE");
if ( (int)strlen(rcom) > MAXCOMSIZ -5 ) {
serrno = SEUMSG2LONG ;
return NULL ;
}
/*
* get the stderr stream if any
*/
strcpy(command, rcom) ;
strcat (command, " 2>&1");
/*
* Allocate and initialize a remote file descriptor.
*/
if ((rfp = (RFILE *)malloc(sizeof(RFILE))) == NULL) {
TRACE(2, "rfio", "rfio_popen: malloc(): ERROR occured (errno=%d)", errno);
END_TRACE();
return NULL ;
}
rfio_setup(rfp) ;
TRACE(3,"rfio","Allocated buffer at %x",rfp);
cp = strchr(command,':') ;
cp2 = strchr(command,' ') ;
/* Bug fix when having a : in the command line but the command is local */
/* If the first space is before the ':', the command is really local */
if (cp2 < cp)
cp = NULL;
if (cp != NULL) {
*cp = '\0' ;
host = command ;
pcom = cp + 1 ;
}
if ( gethostname(localhost, MAXHOSTNAMELEN) < 0) {
TRACE(2,"rfio","gethostname() failed");
TRACE(2,"rfio","freeing RFIO descriptor at 0X%X", rfp);
(void) free((char *)rfp);
END_TRACE();
return NULL;
}
/*
* file is local
*/
if ( (cp == NULL) || !strcmp( host, localhost) || !strcmp(host,"localhost") ) {
TRACE(3,"rfio","popen(%s,%s): local mode",command,type) ;
if (cp == NULL)
#if defined(_WIN32)
file = _popen(command, type);
#else
file = popen(command,type);
#endif
else
#if defined(_WIN32)
file = _popen(pcom, type);
#else
file = popen(pcom, type) ;
#endif
rfio_errno = 0;
if ( file == NULL ) {
TRACE(1,"rfio","popen() failed ,error %d", errno) ;
TRACE(2,"rfio","freeing RFIO descriptor at 0X%X", rfp);
serrno = 0;
(void) free((char *)rfp);
END_TRACE();
return (NULL) ;
}
rfp->fp_save = file;
memcpy( &(rfp->fp), file, sizeof(FILE)) ;
return ( rfp ) ;
}
/*
* Parsing The command
*/
TRACE(2,"rfio", "RFIO descriptor allocated");
TRACE( 3, "rfio","rfio_popen(): host <%s>, command <%s>",host, pcom);
if ( (rfp->s = rfio_connect(host , &rt)) < 0) {
TRACE(2,"rfio","freeing RFIO descriptor at 0X%X", rfp);
(void) free((char *)rfp);
END_TRACE();
return NULL ;
}
/*
* Remote file table is not large enough.
*/
if ((rfp_index = rfio_rfilefdt_allocentry(rfp->s)) == -1) {
TRACE(2, "rfio", "freeing RFIO descriptor at 0X%X", rfp);
(void) close(rfp->s);
(void) free((char *)rfp);
END_TRACE();
errno= EMFILE ;
return NULL ;
}
rfilefdt[rfp_index]=rfp;
p= buf ;
#if defined(__APPLE__)
Cpw = Cgetpwuid(geteuid());
if (Cpw == NULL) {
TRACE(2, "rfio" ,"rfio_popen: Cgetpwuid error %s",sstrerror(serrno));
(void) free((char *)rfp);
END_TRACE();
return NULL ;
}
uname = Cpw->pw_name;
#else
if ( (uname=cuserid(NULL)) == NULL) {
TRACE(2, "rfio" ,"rfio_popen: cuserid error %s",strerror(errno));
(void) free((char *)rfp);
END_TRACE();
return NULL ;
}
#endif
len = 2*WORDSIZE+strlen(type)+strlen(pcom)+strlen(uname)+3 ;
marshall_WORD(p,B_RFIO_MAGIC) ;
marshall_WORD(p,RQST_POPEN) ;
marshall_LONG(p,len) ;
if (netwrite_timeout(rfp->s,buf, RQSTSIZE, RFIO_CTRL_TIMEOUT) != RQSTSIZE ) {
TRACE(2,"rfio","rfio_popen: write(): ERROR occured (errno=%d)",errno);
free((char *)rfp) ;
END_TRACE() ;
return NULL ;
}
p = buf ;
marshall_WORD(p,rfp->uid) ;
marshall_WORD(p,rfp->gid) ;
marshall_STRING(p,type) ;
marshall_STRING(p,pcom) ;
marshall_STRING(p,uname) ;
if (netwrite_timeout(rfp->s,buf, len, RFIO_CTRL_TIMEOUT) != len ) {
TRACE(2,"rfio","rfio_popen: write(): ERROR occured (errno=%d)",errno);
free((char *)rfp) ;
END_TRACE() ;
return NULL ;
}
/*
* Getting status and current offset.
*/
if (netread_timeout(rfp->s,buf, WORDSIZE+LONGSIZE, RFIO_CTRL_TIMEOUT) != (WORDSIZE+LONGSIZE)) {
TRACE(2, "rfio","rfio_popen: read(): ERROR occured (errno=%d)", errno);
free((char *)rfp);
END_TRACE();
return NULL ;
}
p = buf ;
unmarshall_LONG(p, status) ;
unmarshall_WORD(p, rcode) ;
TRACE(1,"rfio","rfio_popen: return status(%d), rcode(%d) for fd(%d)",status,rcode, rfp->s) ;
if (status < 0) {
rfio_errno= rcode ;
free((char *)rfp) ;
END_TRACE() ;
return NULL ;
}
else
return rfilefdt[rfp_index] ;
}
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