revert "%s" addition in em_main.c, broke %D in log_file.

Also added gdb support.

This leaves us with a printf warning.  We accept that as the cost of using PRINTF_FORMAT for strings that aren't libc formats.

5 files changed, 28 insertions, 4 deletions

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index c4739a80f..0555672dd 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -34371,6 +34371,12 @@ End
 In order to see the contents of messages on the queue, and to operate on them,
 &'eximon'& must either be run as root or by an admin user.
 
+The command-line parameters of &'eximon'& are passed to &_eximon.bin_& and may
+contain X11 resource parameters interpreted by the X11 library.  In addition,
+if the first parameter starts with the string "gdb" then it is removed and the
+binary is invoked under gdb (the parameter is used as the gdb command-name, so
+versioned variants of gdb can be invoked).
+
 The monitor's window is divided into three parts. The first contains one or
 more stripcharts and two action buttons, the second contains a &"tail"& of the
 main log file, and the third is a display of the queue of messages awaiting
diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index ed226b756..e953f9b53 100644
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -86,6 +86,9 @@ PP/19 DNS resolver init changes for NetBSD compatibility.  (Risk of breakage
       Not seeing resolver debug output on NetBSD, but suspect this is a
       resolver implementation change.
 
+PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
+      Left warnings.  Added "eximon gdb" invocation mode.
+
 
 Exim version 4.77
 -----------------
diff --git a/src/OS/eximon.conf-Default b/src/OS/eximon.conf-Default
index 9e0769831..2f874ef53 100644
--- a/src/OS/eximon.conf-Default
+++ b/src/OS/eximon.conf-Default
@@ -5,7 +5,7 @@
 # The name of the eximon binary, usually the same as the eximon script,
 # with .bin stuck on the end.
 
-EXIMON_BINARY=${EXIMON_BINARY-$0.bin}
+EXIMON_BINARY="${EXIMON_BINARY-$0.bin}"
 
 # The remaining parameters are values likely to be changed to suit the
 # user's taste. They are documented in the EDITME file.
diff --git a/src/exim_monitor/em_main.c b/src/exim_monitor/em_main.c
index 7193640a5..a0b94b168 100644
--- a/src/exim_monitor/em_main.c
+++ b/src/exim_monitor/em_main.c
@@ -654,7 +654,9 @@ today.) */
 
 if (log_file[0] != 0)
   {
-  (void)string_format(log_file_open, sizeof(log_file_open), "%s", CS log_file);
+  /* Do *not* use "%s" here, we need the %D datestamp in the log_file to
+  be expanded! */
+  (void)string_format(log_file_open, sizeof(log_file_open), CS log_file);
   log_datestamping = string_datestamp_offset >= 0;
 
   LOG = fopen(CS log_file_open, "r");
diff --git a/src/src/eximon.src b/src/src/eximon.src
index d8b3b3182..2211c58a6 100644
--- a/src/src/eximon.src
+++ b/src/src/eximon.src
@@ -19,6 +19,14 @@
 
 # PROCESSED_FLAG
 
+# See if caller wants to invoke gdb
+
+use_gdb=''
+
+case ${1:-foo} in
+  gdb*) use_gdb="$1"; shift ;;
+esac
+
 # Save arguments (can be the usual X parameters)
 
 cmd_args="$@"
@@ -181,8 +189,13 @@ export EXIM_PATH LD_LIBRARY_PATH \
 
 # Exec to the program we really want to run, thereby continuing in
 # just the one process, and let it run in parallel with whatever
-# called this script.
+# called this script (unless gdb was requested in original $1).
 
-exec ${EXIMON_BINARY} $cmd_args &
+if [ "${use_gdb:-}" = "" ] ; then
+  exec "${EXIMON_BINARY}" $cmd_args &
+else
+  exec "$use_gdb" "${EXIMON_BINARY}" $cmd_args
+  # not backgrounded
+fi
 
 # End