Author: branden
Date: 2003-09-10 05:28:42 -0500 (Wed, 10 Sep 2003)
New Revision: 494
Modified:
trunk/debian/changelog
trunk/debian/shell-lib.sh
Log:
debian/shell-lib.sh: various enhancements;
- Use special abnormal exit codes so that problems with this library are
more easily tracked down.
- Abort if the variables $THIS_PACKAGE or $THIS_SCRIPT are not defined, so
that we can do better error reporting.
- errormsg(): report package and script name in error messages
- internal_errormsg(): report package name, script name, and package
version in error message; also, tell people about reportbug
- usage_errormsg(): new; basically a version of internal_errormsg() that
doesn't care if the package was an unofficial build or not
- find_culprits(): exit with status $SHELL_LIB_THROWN_ERROR instead of 1
when packages obstructing an upgrade are found
- remove_conffile_prepare(), remove_conffile_commit(),
remove_conffile_rollback(): new functions to handle the obsoletion of
conffiles across upgrades
Modified: trunk/debian/changelog
===================================================================
--- trunk/debian/changelog 2003-09-10 09:24:39 UTC (rev 493)
+++ trunk/debian/changelog 2003-09-10 10:28:42 UTC (rev 494)
@@ -44,8 +44,24 @@
package prior to 4.0.3 and that alternative is actually registered (see
bug #164021 for a similar issue with another package)
- -- Branden Robinson <[EMAIL PROTECTED]> Wed, 10 Sep 2003 04:23:00 -0500
+ * debian/shell-lib.sh: various enhancements;
+ - Use special abnormal exit codes so that problems with this library are
+ more easily tracked down.
+ - Abort if the variables $THIS_PACKAGE or $THIS_SCRIPT are not defined, so
+ that we can do better error reporting.
+ - errormsg(): report package and script name in error messages
+ - internal_errormsg(): report package name, script name, and package
+ version in error message; also, tell people about reportbug
+ - usage_errormsg(): new; basically a version of internal_errormsg() that
+ doesn't care if the package was an unofficial build or not
+ - find_culprits(): exit with status $SHELL_LIB_THROWN_ERROR instead of 1
+ when packages obstructing an upgrade are found
+ - remove_conffile_prepare(), remove_conffile_commit(),
+ remove_conffile_rollback(): new functions to handle the obsoletion of
+ conffiles across upgrades
+ -- Branden Robinson <[EMAIL PROTECTED]> Wed, 10 Sep 2003 05:22:22 -0500
+
xfree86 (4.2.1-11) unstable; urgency=medium
* urgency set to medium because bug #206790 bites a lot of people (but,
Modified: trunk/debian/shell-lib.sh
===================================================================
--- trunk/debian/shell-lib.sh 2003-09-10 09:24:39 UTC (rev 493)
+++ trunk/debian/shell-lib.sh 2003-09-10 10:28:42 UTC (rev 494)
@@ -3,6 +3,39 @@
[EMAIL PROTECTED]@
[EMAIL PROTECTED]@
+# Use special abnormal exit codes so that problems with this library are more
+# easily tracked down.
+SHELL_LIB_INTERNAL_ERROR=86
+SHELL_LIB_THROWN_ERROR=74
+SHELL_LIB_USAGE_ERROR=99
+
+# initial sanity checks
+if [ -z "$THIS_PACKAGE" ]; then
+ cat >&2 <<EOF
+Error: package maintainer script attempted to use shell library without
+definining \$THIS_PACKAGE shell variable. Please report the package name,
+version, and the text of this error message to the Debian Bug Tracking System.
+Visit <http://www.debian.org/Bugs/Reporting> on the World Wide Web for
+instructions, read the file /usr/share/doc/debian/bug-reporting.txt (from the
+doc-debian package, or install the "reportbug" package and use the command of
+the same name to file a report.
+EOF
+ exit $SHELL_LIB_USAGE_ERROR
+fi
+
+if [ -z "$THIS_SCRIPT" ]; then
+ cat >&2 <<EOF
+Error: package maintainer script attempted to use shell library without
+definining \$THIS_SCRIPT shell variable. Please report the package name,
+version, and the text of this error message to the Debian Bug Tracking System.
+Visit <http://www.debian.org/Bugs/Reporting> on the World Wide Web for
+instructions, read the file /usr/share/doc/debian/bug-reporting.txt (from the
+doc-debian package, or install the "reportbug" package and use the command of
+the same name to file a report.
+EOF
+ exit $SHELL_LIB_USAGE_ERROR
+fi
+
trap "message;\
message \"Received signal. Aborting $THIS_PACKAGE package $THIS_SCRIPT
script.\";\
message;\
@@ -20,24 +53,41 @@
errormsg () {
# exit script with error
- message "$*"
- exit 1;
+ message "$THIS_PACKAGE $THIS_SCRIPT error: $*"
+ exit $SHELL_LIB_THROWN_ERROR
}
internal_errormsg() {
# exit script with error; essentially a "THIS SHOULD NEVER HAPPEN" message
message "$*"
if [ -n "$OFFICIAL_BUILD" ]; then
- message "Please report the package name, version, and the text of the" \
- "above error message(s) to the Debian Bug Tracking System. " \
- "Visit <http://www.debian.org/Bugs/Reporting> on the World Wide" \
- "Web for instructions, or read the file" \
+ message "Please report a bug in the $THIS_SCRIPT script of the" \
+ "$THIS_PACKAGE package, version $SOURCE_VERSION to the Debian Bug" \
+ "Tracking System. Include all messages above that mention the" \
+ "$THIS_PACKAGE package. Visit " \
+ "<http://www.debian.org/Bugs/Reporting> on the World Wide Web for" \
+ "instructions, read the file" \
"/usr/share/doc/debian/bug-reporting.txt (from the doc-debian" \
- "package."
+ "package, or install the reportbug package and use the command of" \
+ "the same name to file a report." \
fi
- exit 1;
+ exit $SHELL_LIB_INTERNAL_ERROR
}
+usage_errormsg() {
+ message "$*"
+ message "Please report a bug in the $THIS_SCRIPT script of the" \
+ "$THIS_PACKAGE package, version $SOURCE_VERSION to the Debian Bug" \
+ "Tracking System. Include all messages above that mention the" \
+ "$THIS_PACKAGE package. Visit " \
+ "<http://www.debian.org/Bugs/Reporting> on the World Wide Web for" \
+ "instructions, read the file" \
+ "/usr/share/doc/debian/bug-reporting.txt (from the doc-debian" \
+ "package, or install the reportbug package and use the command of" \
+ "the same name to file a report." \
+ exit $SHELL_LIB_USAGE_ERROR
+}
+
maplink () {
# returns what symlink should point to; i.e., what the "sane" answer is
# Keep this in sync with the debian/*.links files.
@@ -189,7 +239,7 @@
if [ -n "$PROBLEM" ]; then
analyze_path $SYMLINK $(readlink $SYMLINK)
find_culprits $SYMLINK
- exit 1
+ exit $SHELL_LIB_THROWN_ERROR
fi
done
else
@@ -231,3 +281,97 @@
done
done;
}
+
+remove_conffile_prepare () {
+ # syntax: remove_conffile_prepare filename official_md5sum ...
+ #
+ # Check a conffile "filename" against a list of canonical MD5 checksums.
+ # If the file's current MD5 checksum matches one of the "official_md5sum"
+ # operands provided, then prepare the conffile for removal from the system.
+ # We defer actual deletion until the package is configured so that we can
+ # roll this operation back if package installation fails.
+ #
+ # Call this function from a preinst script in the event $1 is "upgrade" or
+ # "install" and verify $2 to ensure the package is being upgraded from a
+ # version (or installed over a version removed-but-not-purged) prior to the
+ # one in which the conffile was obsoleted.
+
+ local conffile current_checksum
+
+ # validate arguments
+ if [ $# -lt 2 ]; then
+ usage_errormsg "remove_conffile_prepare() called with wrong number of" \
+ "arguments; expected at least 2, got $#"
+ exit $SHELL_LIB_USAGE_ERROR
+ fi
+
+ conffile="$1"
+ shift
+
+ # does the conffile even exist?
+ if [ -e "$conffile" ]; then
+ # calculate its checksum
+ current_checksum=$(md5sum < "$conffile" | sed 's/[[:space:]].*//')
+ # compare it to each supplied checksum
+ while [ -n "$1" ]; do
+ if [ "$current_checksum" = "$1" ]; then
+ # we found a match; move the confffile and stop looking
+ mv "$conffile" "$conffile.$THIS_PACKAGE-tmp"
+ break
+ fi
+ shift
+ done
+ fi
+}
+
+remove_conffile_commit () {
+ # syntax: remove_conffile_commit filename
+ #
+ # Complete the removal of a conffile "filename" that has become obsolete.
+ #
+ # Call this function from a postinst script after having used
+ # remove_conffile_prepare() in the preinst.
+
+ local conffile
+
+ # validate arguments
+ if [ $# -ne 1 ]; then
+ usage_errormsg "remove_conffile_commit() called with wrong number of" \
+ "arguments; expected 1, got $#"
+ exit $SHELL_LIB_USAGE_ERROR
+ fi
+
+ conffile="$1"
+
+ # if the temporary file created by remove_conffile_prepare() exists, remove it
+ if [ -e "$conffile.$THIS_PACKAGE-tmp" ]; then
+ rm "$conffile.$THIS_PACKAGE-tmp"
+ fi
+}
+
+remove_conffile_rollback () {
+ # syntax: remove_conffile_rollback filename
+ #
+ # Roll back the removal of a conffile "filename".
+ #
+ # Call this function from a postrm script in the event $1 is "abort-upgrade"
+ # or "abort-install" is after having used remove_conffile_prepare() in the
+ # preinst.
+
+ local conffile
+
+ # validate arguments
+ if [ $# -ne 1 ]; then
+ usage_errormsg "remove_conffile_commit() called with wrong number of" \
+ "arguments; expected 1, got $#"
+ exit $SHELL_LIB_USAGE_ERROR
+ fi
+
+ conffile="$1"
+
+ # if the temporary file created by remove_conffile_prepare() exists, move it
+ # back
+ if [ -e "$conffile.$THIS_PACKAGE-tmp" ]; then
+ mv "$conffile.$THIS_PACKAGE-tmp" "$conffile"
+ fi
+}
--
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