Add more missing libc functionality

libc/sock/internal.h

@@ -123,6 +123,8 @@ ssize_t sys_sendmsg(int, const struct msghdr *, int) hidden;
 ssize_t sys_recvmsg(int, struct msghdr *, int) hidden;
 int32_t sys_select(int32_t, fd_set *, fd_set *, fd_set *,
                    struct timeval *) hidden;
+int sys_pselect(int, fd_set *, fd_set *, fd_set *, const struct timespec *,
+                const sigset_t *);
 int sys_setsockopt(int, int, int, const void *, uint32_t) hidden;
 int32_t sys_epoll_create(int32_t) hidden;
 int32_t sys_epoll_ctl(int32_t, int32_t, int32_t, void *) hidden;

libc/sock/pselect.c

@@ -0,0 +1,40 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2022 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/calls/strace.internal.h"
+#include "libc/calls/struct/timespec.h"
+#include "libc/intrin/describeflags.internal.h"
+#include "libc/sock/internal.h"
+#include "libc/sock/select.h"
+
+/**
+ * Does what poll() does except with bitset API.
+ *
+ * This system call is supported on all platforms. It's like select()
+ * except that it atomically changes the sigprocmask() during the op.
+ */
+int pselect(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
+            const struct timespec *timeout, const sigset_t *sigmask) {
+  int rc;
+  sigset_t oldmask;
+  rc = sys_pselect(nfds, readfds, writefds, exceptfds, timeout, sigmask);
+  POLLTRACE("pselect(%d, %p, %p, %p, [%s], %s) → %d% m", nfds, readfds,
+            writefds, exceptfds, DescribeTimeval(rc, timeout),
+            DescribeSigset(0, sigmask), rc);
+  return rc;
+}

libc/sock/select.h

@@ -1,5 +1,7 @@
 #ifndef COSMOPOLITAN_LIBC_SOCK_SELECT_H_
 #define COSMOPOLITAN_LIBC_SOCK_SELECT_H_
+#include "libc/calls/struct/sigset.h"
+#include "libc/calls/struct/timespec.h"
 #include "libc/calls/struct/timeval.h"
 #include "libc/str/str.h"
 
@@ -18,6 +20,8 @@ typedef struct fd_set {
 #define FD_ZERO(SET)      bzero((SET)->fds_bits, sizeof((SET)->fds_bits))
 
 int select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
+int pselect(int, fd_set *, fd_set *, fd_set *, const struct timespec *,
+            const sigset_t *);
 
 COSMOPOLITAN_C_END_
 #endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */

libc/sock/sockdebug.c

@@ -16,12 +16,12 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/calls/struct/sockaddr6.h"
 #include "libc/errno.h"
 #include "libc/fmt/itoa.h"
 #include "libc/intrin/describeflags.internal.h"
 #include "libc/macros.internal.h"
 #include "libc/sock/sock.h"
+#include "libc/sock/struct/sockaddr6.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/af.h"
 #include "libc/sysv/consts/ipproto.h"

libc/sock/struct/ip_mreq.h

@@ -1,5 +1,6 @@
 #ifndef COSMOPOLITAN_LIBC_SOCK_STRUCT_IP_MREQ_H_
 #define COSMOPOLITAN_LIBC_SOCK_STRUCT_IP_MREQ_H_
+#include "libc/sock/struct/sockaddr.h"
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 

libc/sock/struct/sockaddr6.h

@@ -0,0 +1,22 @@
+#ifndef COSMOPOLITAN_LIBC_CALLS_STRUCT_SOCKADDR6_H_
+#define COSMOPOLITAN_LIBC_CALLS_STRUCT_SOCKADDR6_H_
+#if !(__ASSEMBLER__ + __LINKER__ + 0)
+
+struct in6_addr {
+  union {
+    uint8_t s6_addr[16];
+    uint16_t s6_addr16[8];
+    uint32_t s6_addr32[4];
+  };
+};
+
+struct sockaddr_in6 { /* Linux+NT ABI */
+  uint16_t sin6_family;
+  uint16_t sin6_port;
+  uint32_t sin6_flowinfo;
+  struct in6_addr sin6_addr;
+  uint32_t sin6_scope_id; /* rfc2553 */
+};
+
+#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
+#endif /* COSMOPOLITAN_LIBC_CALLS_STRUCT_SOCKADDR6_H_ */

libc/sock/syslog.h

@@ -3,8 +3,6 @@
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
-#define LOG_PRI(p) (LOG_PRIMASK & (p))
-
 int setlogmask(int);
 void openlog(const char *, int, int);
 void syslog(int, const char *, ...);