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my solution to lab5

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winPond
2019-07-11 19:40:12 +08:00
parent 1f043fb694
commit f78713349c
364 changed files with 8775 additions and 3249 deletions
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64
lab/user/testpipe.c Normal file
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#include <inc/lib.h>
char *msg = "Now is the time for all good men to come to the aid of their party.";
void
umain(int argc, char **argv)
{
char buf[100];
int i, pid, p[2];
binaryname = "pipereadeof";
if ((i = pipe(p)) < 0)
panic("pipe: %e", i);
if ((pid = fork()) < 0)
panic("fork: %e", i);
if (pid == 0) {
cprintf("[%08x] pipereadeof close %d\n", thisenv->env_id, p[1]);
close(p[1]);
cprintf("[%08x] pipereadeof readn %d\n", thisenv->env_id, p[0]);
i = readn(p[0], buf, sizeof buf-1);
if (i < 0)
panic("read: %e", i);
buf[i] = 0;
if (strcmp(buf, msg) == 0)
cprintf("\npipe read closed properly\n");
else
cprintf("\ngot %d bytes: %s\n", i, buf);
exit();
} else {
cprintf("[%08x] pipereadeof close %d\n", thisenv->env_id, p[0]);
close(p[0]);
cprintf("[%08x] pipereadeof write %d\n", thisenv->env_id, p[1]);
if ((i = write(p[1], msg, strlen(msg))) != strlen(msg))
panic("write: %e", i);
close(p[1]);
}
wait(pid);
binaryname = "pipewriteeof";
if ((i = pipe(p)) < 0)
panic("pipe: %e", i);
if ((pid = fork()) < 0)
panic("fork: %e", i);
if (pid == 0) {
close(p[0]);
while (1) {
cprintf(".");
if (write(p[1], "x", 1) != 1)
break;
}
cprintf("\npipe write closed properly\n");
exit();
}
close(p[0]);
close(p[1]);
wait(pid);
cprintf("pipe tests passed\n");
}