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open /dev/null for ptyfd in hyper_setup_exec_tty() when seq=0

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Signed-off-by: Lai Jiangshan <jiangshanlai@gmail.com>
This commit is contained in:
Lai Jiangshan
2016-03-09 15:45:37 +08:00
parent 0676ed3227
commit a94833c482
1 changed files with 5 additions and 12 deletions
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src/exec.c
+5 -12
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@@ -175,8 +175,10 @@ int hyper_setup_exec_tty(struct hyper_exec *e)
int unlock = 0;
char ptmx[512], path[512];
if (e->seq == 0)
return 0;
if (e->seq == 0) {
e->ptyfd = open("/dev/null", O_RDWR | O_NOCTTY | O_CLOEXEC);
goto done;
}
if (e->errseq > 0) {
int errpipe[2];
@@ -251,20 +253,11 @@ done:
int hyper_dup_exec_tty(int to, struct hyper_exec *e)
{
int fd = -1, ret = -1;
char pty[128];
fprintf(stdout, "%s\n", __func__);
setsid();
if (e->seq) {
fd = e->ptyfd;
} else {
if (sprintf(pty, "/dev/null") < 0) {
perror("get pts device name failed");
goto out;
}
fd = open(pty, O_RDWR | O_NOCTTY);
}
fd = e->ptyfd;
if (fd < 0) {
perror("open pty device for execcmd failed");