popen1.c

unix环境高级编程的源代码

#include    <sys/wait.h>
#include    "ourhdr.h"

int
main(void)
{
    char    line[MAXLINE];
    FILE    *fpin;

    if ( (fpin = popen("myuclc", "r")) == NULL)
        err_sys("popen error");

    for ( ; ; ) {
        fputs("prompt> ", stdout);
        fflush(stdout);
        if (fgets(line, MAXLINE, fpin) == NULL)    /* read from pipe */
            break;
        if (fputs(line, stdout) == EOF)
            err_sys("fputs error to pipe");
    }
    if (pclose(fpin) == -1)
        err_sys("pclose error");
    putchar('\n');
    exit(0);
}