82 rivejä
1.9 KiB
C
82 rivejä
1.9 KiB
C
#include "cmGlobal.h"
|
|
#include "cmRpt.h"
|
|
#include "cmErr.h"
|
|
#include "cmExec.h"
|
|
#include <sys/wait.h>
|
|
|
|
cmExRC_t cmExecV( cmErr_t* err, int* returnValRef, const cmChar_t* pgmFn, va_list vl0 )
|
|
{
|
|
cmExRC_t rc = kOkExRC;
|
|
int n = 0;
|
|
int i = 0;
|
|
pid_t pid;
|
|
va_list vl1;
|
|
|
|
if( pgmFn == NULL )
|
|
return cmErrMsg(err,kInvalidPgmFnExRC,"No executable program file name given in call to %s.",__FUNCTION__);
|
|
|
|
// get the count of arguments
|
|
va_copy(vl1,vl0);
|
|
while( va_arg(vl1,cmChar_t*)!=NULL )
|
|
++n;
|
|
va_end(vl1);
|
|
|
|
|
|
// load argv with ptrs to the args
|
|
cmChar_t* argv[n+2];
|
|
|
|
argv[0] = (cmChar_t*)pgmFn;
|
|
for(i=0; i<n+1; ++i)
|
|
argv[i+1] = va_arg(vl0,cmChar_t*);
|
|
argv[n+1] = NULL;
|
|
|
|
errno = 0;
|
|
|
|
switch( pid = fork())
|
|
{
|
|
case -1:
|
|
rc = cmErrSysMsg(err,kForkFailExRC,errno,"Fork failed.");
|
|
break;
|
|
|
|
case 0:
|
|
// we are in the child process - never to return
|
|
execvp(pgmFn,argv);
|
|
|
|
// under normal conditions execlp() does not return so we should never get here.
|
|
rc = cmErrSysMsg(err,kExecFailExRC,errno,"Fork to '%s' failed. Is '%s' installed and on the execution path?",pgmFn,pgmFn);
|
|
break;
|
|
|
|
default:
|
|
{
|
|
int rv;
|
|
int wrc;
|
|
|
|
// we are in the parent process - wait for the child to return
|
|
if((wrc = waitpid(pid,&rv,0))==-1)
|
|
{
|
|
rc = cmErrSysMsg(err,kWaitFailExRC,errno,"Wait failed on call to '%s'.",pgmFn);
|
|
goto errLabel;
|
|
}
|
|
|
|
if( returnValRef != NULL )
|
|
*returnValRef = rv;
|
|
|
|
if( WEXITSTATUS(rv) != 0 )
|
|
rc = cmErrMsg(err,kPgmFailExRC,"'%s' failed.",pgmFn);
|
|
}
|
|
break;
|
|
}
|
|
|
|
errLabel:
|
|
return rc;
|
|
}
|
|
|
|
cmExRC_t cmExec( cmErr_t* err, int* returnValRef, const cmChar_t* pgmFn, ... )
|
|
{
|
|
va_list vl;
|
|
va_start(vl,pgmFn);
|
|
cmExRC_t rc = cmExecV(err,returnValRef,pgmFn,vl);
|
|
va_end(vl);
|
|
return rc;
|
|
}
|