t.cc

一个awk和bsh混合编程的例子

#include  <stdio.h>
#include  <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

int   main(int argc, char* argv[])
{
	FILE* fp   =   NULL;
	char buf[128];

	if (2 !=   argc)
	{
		printf( "usage: %s   <filename> \n ",   argv[1]);
		exit(0);
	}

	sprintf(buf, "file   %s ", argv[1]);
	if   (NULL == (fp = popen(buf, "r ")))
	{
		printf( "Error:   popen:   %s\n ", strerror(errno));
		exit(1);
	}

	sleep(1);
	memset(buf, 0, 128);
	fgets(buf, 128, fp);
	pclose(fp);

	printf( "%s ", buf);

	exit(0);
}