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Bug#987787: libdebuginfod-common: wrong permissions on /etc/profile.d/debuginfod.{c,}sh (and odd content)



On Thu, Jan 20, 2022 at 10:13:46AM +0800, Paul Wise wrote:
> On Mon, 2022-01-17 at 18:38 +0100, наб wrote:
> > I don't disagree, but /e/p.d/* can't be symlinks to /u/s.
> I don't think that is correct (since systemd symlinks from /etc to
> /usr), but if it were then just copying the files would work instead.
Those are not in ucf and not meant to be edited; these are.

> > However, please consider new, simplified, patch below,
> > applying to current Salsa HEAD
> > (4ff688068d05a82039f7cbf88ae99e4d6a4bc327, 0.186-1).
> This patch contains unnecessary whitespace changes, please
> revert them so that we can see the substantive changes instead.
show -w below.

наб
From: наб <nabijaczleweli@nabijaczleweli.xyz>
Date: Mon Jan 17 18:26:42 2022 +0100
Subject: d/libdebuginfod-common.post{inst,rm}:
 install conffiles 644, use /bin/sh shebang,
 remove /e/p.d/dd.*sh if libdebuginfod/usedebiandebuginfod unset

---
 debian/libdebuginfod-common.postinst | 97 +++++-------------------------------
 debian/libdebuginfod-common.postrm   | 23 ++++-----
 2 files changed, 22 insertions(+), 98 deletions(-)

diff --git a/debian/libdebuginfod-common.postinst b/debian/libdebuginfod-common.postinst
index a482967..93f5fa3 100644
--- a/debian/libdebuginfod-common.postinst
+++ b/debian/libdebuginfod-common.postinst
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -e
 
@@ -6,101 +6,28 @@ set -e
 
 CONFTEMPLATEPATH="/usr/share/libdebuginfod-common"
 
-# Change a "generic" shell file according to enable/disable
-# DEBUGINFOD_URLS according.
-#
-# - $1 is the shell file name
-#
-# - $2 is the pattern that we will look for when changing the file.
-#   This pattern will also be used to perform the substitution.
-#
-# - $3 is the action we will perform: set the DEBUGINFOD_URLS
-#   variable, or unset it.
-#
-# By the end of it, the specified shell file will have an extra line
-# which either sets DEBUGINFOD_URLS to have its own value, or sets
-# DEBUGINFOD_URLS to be empty (i.e., unsets any value).
-change_shell_file ()
-{
-    file="$1"
-    pattern="$2"
-
-    if [ "$3" = "set" ]; then
-	finalvar='$DEBUGINFOD_URLS'
-    else
-	finalvar=""
-    fi
-
-    # Check whether the last line of the file already starts with
-    # ${pattern}.  If it does, then we will perform a sed to replace
-    # it according to the action specified.  Otherwise, we will append
-    # a last line containing the set/unset.
-    if tail -n1 "$file" | grep -q "^$pattern"; then
-	sed -i "\$s@${pattern}.*@${pattern}\"${finalvar}\"@" "${file}"
-    else
-	echo "${pattern}\"${finalvar}\"" >> "${file}"
-    fi
-}
-
-# Change the .sh file according to an action specified by $1.  It can
-# be either "set" (meaning that we will be setting DEBUGINFOD_URLS to
-# a valid value), or "unset" (which means that DEBUGINFOD_URLS will be
-# empty).
-change_sh_file ()
-{
-    shfile="$1"
-    shaction="$2"
-
-    change_shell_file \
-	"$shfile" \
-	"export DEBUGINFOD_URLS=" \
-	"$shaction"
-}
-
-# Change the .csh file according to an action specified by $1.  The
-# explanation for change_sh_file also applies here.
-change_csh_file ()
-{
-    cshfile="$1"
-    cshaction="$2"
-
-    change_shell_file \
-	"$cshfile" \
-	"setenv DEBUGINFOD_URLS " \
-	"$cshaction"
-}
-
 case "$1" in
     configure)
 		GOT_DEBCONF_ANSWER=0
-
 		for ext in sh csh; do
-	    if [ -f "${CONFTEMPLATEPATH}"/debuginfod."${ext}" ]; then
+			[ -f "${CONFTEMPLATEPATH}/debuginfod.${ext}" ] || continue
+
 			if [ "$GOT_DEBCONF_ANSWER" -eq 0 ]; then
-		    RET="false"
-		    if grep -qFx "ID=debian" /etc/os-release; then
-			db_get libdebuginfod/usedebiandebuginfod || RET="false"
+				grep -qFx "ID=debian" /etc/os-release && db_get libdebuginfod/usedebiandebuginfod || RET="false"
+				GOT_DEBCONF_ANSWER=1
 			fi
 
 			if [ "$RET" = "true" ]; then
-			action="set"
-		    else
-			action="unset"
+				UCF_FORCE_CONFFMISS=1 ucf --three-way --debconf-ok "${CONFTEMPLATEPATH}/debuginfod.${ext}" "/etc/profile.d/debuginfod.${ext}"
+				if [ "$(stat -c%a "/etc/profile.d/debuginfod.${ext}")" = 600 ]; then
+					chmod 644 "/etc/profile.d/debuginfod.${ext}"  # Correct permissions created by previous versions (<=0.186-1)
 				fi
-		    GOT_DEBCONF_ANSWER=1
-		fi
-
-		tmpfile=$(mktemp)
-		cat "${CONFTEMPLATEPATH}"/debuginfod."${ext}" > "$tmpfile"
-		change_"${ext}"_file "$tmpfile" "$action"
-
-		ucf --three-way --debconf-ok \
-		    "$tmpfile" \
-		    /etc/profile.d/debuginfod."${ext}"
-		ucfr libdebuginfod-common /etc/profile.d/debuginfod."${ext}"
-		rm -f "${tmpfile}"
+			else
+				rm -f "/etc/profile.d/debuginfod.${ext}"
 			fi
+			ucfr libdebuginfod-common "/etc/profile.d/debuginfod.${ext}"
 		done
+		rm -rf "${tmpdir}"
 	;;
 
     abort-upgrade|abort-remove|abort-deconfigure)
diff --git a/debian/libdebuginfod-common.postrm b/debian/libdebuginfod-common.postrm
index 62a92ca..250ab6c 100644
--- a/debian/libdebuginfod-common.postrm
+++ b/debian/libdebuginfod-common.postrm
@@ -1,27 +1,24 @@
-#!/bin/bash
+#!/bin/sh
 
 set -e
 
 case "$1" in
     purge)
 		for ext in sh csh; do
-	    if [ -f /etc/profile.d/debuginfod."${ext}" ]; then
-		if which ucf > /dev/null; then
-		    ucf --purge /etc/profile.d/debuginfod."${ext}"
-		fi
-		if which ucfr > /dev/null; then
-		    ucfr --purge libdebuginfod-common /etc/profile.d/debuginfod."${ext}"
+			[ -f "/etc/profile.d/debuginfod.${ext}" ] || continue
+
+			if command -v ucf > /dev/null; then
+				ucf --purge "/etc/profile.d/debuginfod.${ext}"
 			fi
-		rm -f /etc/profile.d/debuginfod."${ext}"
+			if command -v ucfr > /dev/null; then
+				ucfr --purge libdebuginfod-common "/etc/profile.d/debuginfod.${ext}"
 			fi
-	done
-	;;
 
-    remove)
-	:
+			rm -f "/etc/profile.d/debuginfod.${ext}"
+		done
 	;;
 
-    upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
+    remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
 	;;
 
     *)

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