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Mount /dev/pts with gid of tty group and set nosuid, noexec flags

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Note, this code only runs if /dev/pts was not mounted in /etc/fstab

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg
2021-05-09 14:38:16 +02:00
parent 073b040981
commit 3f3e70c686
1 changed files with 13 additions and 1 deletions
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src/finit.c
+13 -1
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@@ -211,8 +211,20 @@ static void fs_finalize(void)
/* Modern systems use /dev/pts */
if (!fismnt("/dev/pts")) {
char opts[32];
int mode;
int gid;
gid = getgroup("tty");
if (gid == -1)
gid = 0;
/* 0600 is default on Debian, use 0620 to get mesg y by default */
mode = 0620;
snprintf(opts, sizeof(opts), "gid=%d,mode=%d,ptmxmode=0666", gid, mode);
makedir("/dev/pts", 0755);
mount("devpts", "/dev/pts", "devpts", 0, "gid=5,mode=620,ptmxmode=0666");
mount("devpts", "/dev/pts", "devpts", MS_NOSUID | MS_NOEXEC, opts);
}
/*