From 1172c1e817d26d5f9bb0ec289dd9a71aadf2759c Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Tue, 20 Apr 2021 00:00:22 +0000
Subject:  Add portability infrastructure

---
 src/os/deps-lib/os-freebsd       |  3 +++
 src/os/deps-lib/os-linux         |  4 ++++
 src/os/linux-os_kbspecials.c     | 33 +++++++++++++++++++++++++++++++++
 src/os/linux-os_mount_devtmpfs.c | 10 ++++++++++
 src/os/linux-os_mount_tmpfs.c    | 31 +++++++++++++++++++++++++++++++
 src/os/linux-os_reboot.c         | 10 ++++++++++
 6 files changed, 91 insertions(+)
 create mode 100644 src/os/deps-lib/os-freebsd
 create mode 100644 src/os/deps-lib/os-linux
 create mode 100644 src/os/linux-os_kbspecials.c
 create mode 100644 src/os/linux-os_mount_devtmpfs.c
 create mode 100644 src/os/linux-os_mount_tmpfs.c
 create mode 100644 src/os/linux-os_reboot.c

(limited to 'src/os')

diff --git a/src/os/deps-lib/os-freebsd b/src/os/deps-lib/os-freebsd
new file mode 100644
index 0000000..a8c2a99
--- /dev/null
+++ b/src/os/deps-lib/os-freebsd
@@ -0,0 +1,3 @@
+freebsd-os_reboot.o
+freebsd-os_kbspecials.o
+freebsd-os_mount_tmpfs.o
diff --git a/src/os/deps-lib/os-linux b/src/os/deps-lib/os-linux
new file mode 100644
index 0000000..56fe3fc
--- /dev/null
+++ b/src/os/deps-lib/os-linux
@@ -0,0 +1,4 @@
+linux-os_reboot.o
+linux-os_kbspecials.o
+linux-os_mount_devtmpfs.o
+linux-os_mount_tmpfs.o
diff --git a/src/os/linux-os_kbspecials.c b/src/os/linux-os_kbspecials.c
new file mode 100644
index 0000000..0d407ab
--- /dev/null
+++ b/src/os/linux-os_kbspecials.c
@@ -0,0 +1,33 @@
+/* ISC license. */
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <signal.h>
+
+#include <sys/reboot.h>
+#include <sys/ioctl.h>
+#include <linux/kd.h>
+
+#include <skalibs/strerr2.h>
+#include <skalibs/sig.h>
+
+#include "os.h"
+
+void os_kbspecials (int inns)
+{
+  int fd ;
+  if (inns) return ;
+  fd = open("/dev/tty0", O_RDONLY | O_NOCTTY) ;
+  if (fd < 0)
+    strerr_warnwu2sys("open /dev/", "tty0 (kbrequest will not be handled)") ;
+  else
+  {
+    if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)
+      strerr_warnwu2sys("ioctl KDSIGACCEPT on ", "tty0 (kbrequest will not be handled)") ;
+    close(fd) ;
+  }
+
+  sig_block(SIGINT) ; /* don't panic on early cad before s6-svscan catches it */
+  if (reboot(RB_DISABLE_CAD) == -1)
+    strerr_warnwu1sys("trap ctrl-alt-del") ;
+}
diff --git a/src/os/linux-os_mount_devtmpfs.c b/src/os/linux-os_mount_devtmpfs.c
new file mode 100644
index 0000000..b3f34a1
--- /dev/null
+++ b/src/os/linux-os_mount_devtmpfs.c
@@ -0,0 +1,10 @@
+/* ISC license. */
+
+#include <sys/mount.h>
+
+#include "os.h"
+
+int os_mount_devtmpfs (char const *point)
+{
+  return mount("dev", point, "devtmpfs", MS_NOSUID | MS_NOEXEC, "") ;
+}
diff --git a/src/os/linux-os_mount_tmpfs.c b/src/os/linux-os_mount_tmpfs.c
new file mode 100644
index 0000000..0e173d0
--- /dev/null
+++ b/src/os/linux-os_mount_tmpfs.c
@@ -0,0 +1,31 @@
+/* ISC license. */
+
+#include <errno.h>
+
+#include <sys/mount.h>
+
+#include <skalibs/strerr2.h>
+
+#include "os.h"
+
+void os_mount_tmpfs (char const *point, unsigned int mounttype)
+{
+  if (mounttype)
+  {
+    if (mounttype == 2)
+    {
+      if (mount("tmpfs", point, "tmpfs", MS_REMOUNT | MS_NODEV | MS_NOSUID, "mode=0755") == -1)
+        strerr_diefu2sys(111, "remount ", point) ;
+    }
+    else
+    {
+      if (umount(point) == -1)
+      {
+        if (errno != EINVAL)
+          strerr_warnwu2sys("umount ", point) ;
+      }
+      if (mount("tmpfs", point, "tmpfs", MS_NODEV | MS_NOSUID, "mode=0755") == -1)
+        strerr_diefu2sys(111, "mount tmpfs on ", point) ;
+    }
+  }
+}
diff --git a/src/os/linux-os_reboot.c b/src/os/linux-os_reboot.c
new file mode 100644
index 0000000..fb41584
--- /dev/null
+++ b/src/os/linux-os_reboot.c
@@ -0,0 +1,10 @@
+/* ISC license. */
+
+#include <sys/reboot.h>
+
+#include "os.h"
+
+void os_reboot (int what)
+{
+  reboot(what == 3 ? RB_AUTOBOOT : what == 2 ? RB_POWER_OFF : RB_HALT_SYSTEM) ;
+}
-- 
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