bugfix: wall message on non-immediate shutdown(8)

1 files changed, 38 insertions, 0 deletions

diff --git a/src/shutdown/hpr_wallv.c b/src/shutdown/hpr_wallv.c
new file mode 100644
index 0000000..50523c5
--- /dev/null
+++ b/src/shutdown/hpr_wallv.c
@@ -0,0 +1,38 @@
+/* ISC license. */
+
+#include <string.h>
+#include <sys/uio.h>
+#include <utmpx.h>
+
+#include <skalibs/allreadwrite.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/djbunix.h>
+#include <skalibs/posixishard.h>
+
+#include "hpr.h"
+
+#ifndef UT_LINESIZE
+#define UT_LINESIZE 32
+#endif
+
+void hpr_wallv (struct iovec const *v, unsigned int n)
+{
+  char tty[10 + UT_LINESIZE] = "/dev/" ;
+  setutxent() ;
+  for (;;)
+  {
+    size_t linelen ;
+    int fd ;
+    struct utmpx *utx = getutxent() ;
+    if (!utx) break ;
+    if (utx->ut_type != USER_PROCESS) continue ;
+    linelen = strnlen(utx->ut_line, UT_LINESIZE) ;
+    memcpy(tty + 5, utx->ut_line, linelen) ;
+    tty[5 + linelen] = 0 ;
+    fd = open_append(tty) ;
+    if (fd == -1) continue ;
+    allwritev(fd, v, n) ;
+    fd_close(fd) ;
+  }
+  endutxent() ;
+}