[转载] Re: freopen# Unix - 噫吁兮，危乎高哉
f*c
1 楼
【 以下文字转载自 Programming 讨论区 】
【 原文由 funsc 所发表 】
ok
the code is as follows:
while(1)
{
getcommand(args); //the function is to get a command line and works corrently
pid = fork();
if (pid == 0)
{
fd = freopen("a.txt", "w", stdout);
execvp(args[0], args);
}
else
{
waitpid(pid);
}
}
after i run ls -l > foo, the output has been written to a.txt, as i hoped,
but when i run ls again, the result does not show on screen.
it seems that after i redirect the stdout to the file "
【 原文由 funsc 所发表 】
ok
the code is as follows:
while(1)
{
getcommand(args); //the function is to get a command line and works corrently
pid = fork();
if (pid == 0)
{
fd = freopen("a.txt", "w", stdout);
execvp(args[0], args);
}
else
{
waitpid(pid);
}
}
after i run ls -l > foo, the output has been written to a.txt, as i hoped,
but when i run ls again, the result does not show on screen.
it seems that after i redirect the stdout to the file "