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Release pledge.com 1.7 and landlockmake.com 1.3

Browse source 
- pledge("chown") now supported
- pledge("stdio") now allows killing self
- Write tests for pselect() and ppoll()
This commit is contained in:
Justine Tunney 2022-08-15 19:52:00 -07:00
parent 255d834f8f
commit ce588dd56b
19 changed files with 190 additions and 39 deletions
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28
libc/sock/pselect.c
View file

@ -29,6 +29,19 @@
/**
* Does what poll() does except with bitset API.
*
* This function is the same as saying:
*
* sigset_t old;
* sigprocmask(SIG_SETMASK, sigmask, &old);
* select(nfds, readfds, writefds, exceptfds, timeout);
* sigprocmask(SIG_SETMASK, old, 0);
*
* Except it happens atomically.
*
* The Linux Kernel modifies the timeout parameter. This wrapper gives
* it a local variable due to POSIX requiring that `timeout` be const.
* If you need that information from the Linux Kernel use sys_pselect.
*
* This system call is supported on all platforms. It's like select()
* except that it atomically changes the sigprocmask() during the op.
*/
@ -37,6 +50,11 @@ int pselect(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
int rc;
sigset_t oldmask;
struct timeval tv, *tvp;
struct timespec ts, *tsp;
struct {
sigset_t *s;
size_t n;
} ss;
if (nfds < 0) {
rc = einval();
} else if (IsAsan() &&
@ -46,6 +64,16 @@ int pselect(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
(timeout && !__asan_is_valid(timeout, sizeof(*timeout))) ||
(sigmask && !__asan_is_valid(sigmask, sizeof(*sigmask))))) {
rc = efault();
} else if (IsLinux()) {
if (timeout) {
ts = *timeout;
tsp = &ts;
} else {
tsp = 0;
}
ss.s = sigmask;
ss.n = 8;
rc = sys_pselect(nfds, readfds, writefds, exceptfds, tsp, &ss);
} else if (!IsWindows()) {
rc = sys_pselect(nfds, readfds, writefds, exceptfds, timeout, sigmask);
} else {