PetscVFPrintf#

All PETSc standard out and error messages are sent through this function; so, in theory, this can can be replaced with something that does not simply write to a file.

Synopsis#

PetscErrorCode PetscVFPrintfDefault(FILE *fd, const char *format, va_list Argp)

To use, write your own function for example,

PetscErrorCode mypetscvfprintf(FILE *fd,const char format[],va_list Argp)
{$  PetscErrorCode ierr;

if (fd != stdout && fd != stderr) {  handle regular files
CHKERR(PetscVFPrintfDefault(fd,format,Argp));
} else {
char   buff[BIG];
size_t length;
PetscCall(PetscVSNPrintf(buff,BIG,format,&length,Argp));
now send buff to whatever stream or whatever you want
}
}then before the call to PetscInitialize() do the assignment
PetscVFPrintf = mypetscvfprintf;

Note#

For error messages this may be called by any process, for regular standard out it is called only by process 0 of a given communicator

Developer Note#

this could be called by an error handler, if that happens then a recursion of the error handler may occur and a crash

See Also#

PetscVSNPrintf(), PetscErrorPrintf()

Level#

developer

Location#

src/sys/fileio/mprint.c


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