SECURITY: Refuse negative and large store allocations

[exim.git] / src / scripts / reversion

diff --git a/src/scripts/reversion b/src/scripts/reversion
index 45755c0848944e53fe81438e98cdcb492ec46219..cec1db2fbde8d7ffa1dd14d3a17f523abc7925b6 100755 (executable)
--- a/src/scripts/reversion
+++ b/src/scripts/reversion
@@ -1,5 +1,5 @@
 #!/bin/sh
-# Copyright (c) The Exim Maintainers 2016
+# Copyright (c) The Exim Maintainers 1995 - 2018
 
 set -e
 LC_ALL=C
@@ -29,43 +29,48 @@ fi
 # Read version information that was generated by a previous run of
 # this script, or during the release process.
 
-if   [ -f ./version.sh ]
-then .    ./version.sh
-elif [ -f ../src/version.sh ]
-then .    ../src/version.sh
+# Override, used for automated testing w/o access to the
+# .git directory (w.g. inside a git worktree)
+if   [ -n "$EXIM_RELEASE_VERSION" ]; then
+    :
+elif   [ -f ./version.sh ]; then
+    .    ./version.sh
+elif [ -f ../src/version.sh ]; then
+    .    ../src/version.sh
+elif [ -d ../../.git ] || [ -f ../../.git ] || [ "$1" = release ]; then
+    # Modify the output of git describe into separate parts for
+    # the name "exim" and the release and variant versions.
+    # Put a dot in the version number and remove a spurious g.
+    if [ "$2" ]
+    then
+        description=$(git describe "$2")
+    else
+        description=$(git describe --dirty=-XX --match 'exim-4*')
+    fi
+    set $(echo "$description" | sed 's/-/ /; s/-g/-/')
+    # Only update if we need to
+    if [ "$2 $3" != "$EXIM_RELEASE_VERSION $EXIM_VARIANT_VERSION" ]
+    then
+            EXIM_RELEASE_VERSION="$2"
+            EXIM_VARIANT_VERSION="$3"
+            rm -f version.h
+    fi
 fi
 
-# If this tree is a git working directory, use that to get version information.
-
-if [ -d ../../.git ] || [ "$1" = "release" ]
-then
-       # Modify the output of git describe into separate parts for
-       # the name "exim" and the release and variant versions.
-       # Put a dot in the version number and remove a spurious g.
-       if [ "$2" ]
-       then
-           description=$(git describe "$2")
-       else
-           description=$(git describe --dirty=-XX --match 'exim-4*')
-       fi
-       set $(echo "$description" | sed 's|-| |;s|_|.|;s|[-_]| _|;s|-g|-|')
-       # Only update if we need to
-       if [ "$2 $3" != "$EXIM_RELEASE_VERSION $EXIM_VARIANT_VERSION" ]
-       then
-               EXIM_RELEASE_VERSION="$2"
-               EXIM_VARIANT_VERSION="$3"
-               rm -f version.h
-       fi
+if [ -z "$EXIM_RELEASE_VERSION" ]; then
+    echo "Cannot determine the release number" >&2
+    echo "You may want to override it with EXIM_RELEASE_VERSION" >&2
+    exit 1
 fi
 
 # If you are maintaining a patched version of Exim, you can either
 # create your own version.sh as part of your release process, or you
 # can modify EXIM_VARIANT_VERSION at this point in this script.
 
-case "$EXIM_RELEASE_VERSION" in
-'')    echo "*** Your copy of Exim lacks any version information."
-       exit 1
-esac
+if test -z "$EXIM_RELEASE_VERSION"; then
+    echo "$0: Your copy of Exim lacks any version information." >&2
+    exit 1
+fi
 
 EXIM_COMPILE_NUMBER=$(expr "${EXIM_COMPILE_NUMBER:-0}" + 1)
 
@@ -96,11 +101,12 @@ if [ ".${SOURCE_DATE_EPOCH:-}" != "." ]; then
   # builds without it causing any problems: nothing really cares about timezone.
   # GNU date: "date -d @TS"
   # BSD date: "date -r TS"
-  exim_build_date_override="$(date -u -d "@${SOURCE_DATE_EPOCH}" "$fmt" 2>/dev/null | date -u -r "${SOURCE_DATE_EPOCH}" "$fmt" 2>/dev/null)"
+  exim_build_date_override="$(date -u -d "@${SOURCE_DATE_EPOCH}" "$fmt" 2>/dev/null || date -u -r "${SOURCE_DATE_EPOCH}" "$fmt" 2>/dev/null)"
 fi
 
 ( echo '# automatically generated file - see ../scripts/reversion'
   echo EXIM_RELEASE_VERSION='"'"$EXIM_RELEASE_VERSION"'"'
+  test -n "$EXIM_VARIANT_VERSION" && \
   echo EXIM_VARIANT_VERSION='"'"$EXIM_VARIANT_VERSION"'"'
   echo EXIM_COMPILE_NUMBER='"'"$EXIM_COMPILE_NUMBER"'"'
   if [ ".${exim_build_date_override:-}" != "." ]; then
@@ -112,13 +118,17 @@ if [ ! -f version.h ]
 then
 ( echo '/* automatically generated file - see ../scripts/reversion */'
   echo '#define EXIM_RELEASE_VERSION "'"$EXIM_RELEASE_VERSION"'"'
+  test -n "$EXIM_VARIANT_VERSION" && \
   echo '#define EXIM_VARIANT_VERSION "'"$EXIM_VARIANT_VERSION"'"'
-  echo '#define EXIM_VERSION_STR EXIM_RELEASE_VERSION EXIM_VARIANT_VERSION'
+  echo '#ifdef EXIM_VARIANT_VERSION'
+  echo '#define EXIM_VERSION_STR EXIM_RELEASE_VERSION "-" EXIM_VARIANT_VERSION'
+  echo '#else'
+  echo '#define EXIM_VERSION_STR EXIM_RELEASE_VERSION'
+  echo '#endif'
   if [ ".${exim_build_date_override:-}" != "." ]; then
     echo '#define EXIM_BUILD_DATE_OVERRIDE "'"${exim_build_date_override}"'"'
   fi
 ) >version.h
 fi
 
-echo ">>> version $EXIM_RELEASE_VERSION$EXIM_VARIANT_VERSION #$EXIM_COMPILE_NUMBER"
-echo
+#test -t 1 && echo ">>> version $EXIM_RELEASE_VERSION $EXIM_VARIANT_VERSION #$EXIM_COMPILE_NUMBER"