rfio_popen3

Usage

Overview

rfio_popen starts a process and opens a pipe to it.

command is a pointer to a string specifying the shell command to be executed.

type is a mode indicator for the pipe. One of the characters "r" or "w".

rfio_pclose waits for the forked process to terminate and returns the exit status of the command.

Examples

	int c;
	FILE *rf;
	rf = rfio_popen (command, "r");
	if (rf == NULL) {
		rfio_perror ("rfio_popen");
		exit (1);
	}
	while ((c = rfio_pread (buf, 1, sizeof(buf), rf)) > 0) {
		...
	}
	c = rfio_pclose (rf);

Return value

This routine returns NULL if the operation failed or a non-NULL pointer to a FILE structure if the operation was successful. If it fails, serrno variable is set appropriately.

Errors