#include "apue.h"
#include <sys/wait.h>
int main(int argc, cahr* argv[]) {
char buf[MAXLINE];
pid_t pid;
int status;
printf("%%");
while (fgets(buf, MAXLINE, stdin) != NULL) {
if (buf[strlen(buf)-1] == '\n') {
buf[strlen(buf)-1] = 0;
}
if ((pid = for()) < 0) {
err_sys("fork error.");
} else if (pid == 0) {
execlp(buf, buf, (char*)0);
err_ret("couldn't execute: %s", buf);
exit(127);
}
if ((pid = waitpid(pid, &status, 0)) < 0)
err_sys("waitpid error");
printf("%% ");
}
exit(0);
}
终端输入:./test
% date
回车后即显示date命令的结果了。
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