2:  #include <petscsys.h>

  4: /*@C
  5:     PetscStartMatlab - starts up MATLAB with a MATLAB script

  7:     Logically Collective on MPI_Comm, but only processor zero in the communicator does anything

  9:     Input Parameters:
 10: +     comm - MPI communicator
 11: .     machine - optional machine to run MATLAB on
 12: -     script - name of script (without the .m)

 14:     Output Parameter:
 15: .     fp - a file pointer returned from PetscPOpen()

 17:     Level: intermediate

 19:     Notes:
 20:      This overwrites your matlab/startup.m file

 22:      The script must be in your MATLAB path or current directory

 24:      Assumes that all machines share a common file system

 26: .seealso: PetscPOpen(), PetscPClose()
 27: @*/
 28: PetscErrorCode  PetscStartMatlab(MPI_Comm comm,const char machine[],const char script[],FILE **fp)
 29: {
 31:   FILE           *fd;
 32:   char           command[512];
 33: #if defined(PETSC_HAVE_UCBPS) && defined(PETSC_HAVE_POPEN)
 34:   char           buf[1024],*found;
 35:   PetscMPIInt    rank;
 36: #endif

 39: #if defined(PETSC_HAVE_UCBPS) && defined(PETSC_HAVE_POPEN)
 40:   /* check if MATLAB is not already running */
 41:   PetscPOpen(comm,machine,"/usr/ucb/ps -ugxww | grep matlab | grep -v grep","r",&fd);
 42:   MPI_Comm_rank(comm,&rank);
 43:   if (!rank) found = fgets(buf,1024,fd);
 44:   MPI_Bcast(&found,1,MPI_CHAR,0,comm);
 45:   PetscPClose(comm,fd,NULL);
 46:   if (found) return(0);
 47: #endif

 49:   if (script) {
 50:     /* the remote machine won't know about current directory, so add it to MATLAB path */
 51:     /* the extra \" are to protect possible () in the script command from the shell */
 52:     sprintf(command,"echo \"delete ${HOMEDIRECTORY}/matlab/startup.m ; path(path,'${WORKINGDIRECTORY}'); %s  \" > ${HOMEDIRECTORY}/matlab/startup.m",script);
 53: #if defined(PETSC_HAVE_POPEN)
 54:     PetscPOpen(comm,machine,command,"r",&fd);
 55:     PetscPClose(comm,fd,NULL);
 56: #endif
 57:   }
 58: #if defined(PETSC_HAVE_POPEN)
 59:   PetscPOpen(comm,machine,"xterm -display ${DISPLAY} -e matlab -nosplash","r",fp);
 60: #endif
 61:   return(0);
 62: }