- Pacman-dev - lists.archlinux.org

[RFC] Proposal: 1-byte status signaling for db.lck
by Carsten Heine 05 Apr '26

05 Apr '26

Hello, I am proposing a specification update for the ALPM/Pacman lock file. The current binary-existential state (exists/not exists) is insufficient for modern multi-process environments and leads to significant state-blindness for administrators. Specification: # Feature-Request: Content-Based Lock-State Signaling (CBLSS) Author: Carsten Udo Heine <cuheine(a)gmail.com> Version: 20260404-1316 Abstract: The current db.lck mechanism in ALPM/Pacman is purely binary. This proposal introduces a 1-byte status register (Hex-Nibbles) and vector-based logging (New (Old)) to ensure transparency. Rationale: 1. Context Awareness: Allows admins to distinguish between critical mutations (Writing) and non-invasive tasks (Pending/Info). 2. Deterministic Forensics: The New (Old) notation (e.g., 01 (30)) documents transitions. Missing transitions reveal crashes. 3. Architectural Discipline: Forces UI wrappers to justify their state, exposing preemptive locking "overcast". Technical Specification (The "Hex-Nipple" Model): The file /var/lib/pacman/db.lck shall contain exactly 1 Byte. High Nipple (Soft/Info) : Low Nipple (Hart/Action) : Definition 0 0 doneOK: System is free. 1 0 Pending: Background update check in progress. 2 0 Information: Updates found; no active mutation. 3 0 Waiting: GUI awaiting user input (Block risk!). 0 1 Writing: CRITICAL. Database mutation in progress. 0 3 Error: Process aborted; potential inconsistency. Logging Protocol (db.lck.log): Format: TIMESTAMP | PID | PROCESS | NEW (OLD) Principle: Append-only. This proposal maintains DRY principles and POSIX integrity without adding new dependencies or daemons. I am looking forward to technical feedback. Regards, Carsten

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[PATCH] conf: Fix off-by-one heap overrun in escape_chars()
by Chris Down 19 Mar '26

19 Mar '26

escape_chars() computes the post-escaping buffer size as len + pattern_chars, but unfortunately never accounts for the null terminator it unconditionally writes afterwards. That means that when pacman-conf applies --sysroot to an Include directive and that sysroot path contains a character that also happens to be a glob metacharacter, the null terminator is written one byte past the end of the allocation. Fix both the overflow guard and the malloc size so the terminator always falls within the allocated region. The off by one write is reliably caught by ASAN, so add a dedicated TAP test to prevent regressions. Fixes: 7016adcb7035 ("manually apply --sysroot to configuration") --- meson.build | 2 +- src/pacman/conf.c | 4 +-- test/util/meson.build | 9 +++++ test/util/pacman-conf-sysroot-escape.sh | 45 +++++++++++++++++++++++++ 4 files changed, 57 insertions(+), 3 deletions(-) create mode 100755 test/util/pacman-conf-sysroot-escape.sh diff --git a/meson.build b/meson.build index 8e2444d1..800f37e9 100644 --- a/meson.build +++ b/meson.build @@ -374,7 +374,7 @@ pacman_bin = executable( install : true, ) -executable( +pacman_conf_bin = executable( 'pacman-conf', pacman_conf_sources, include_directories : includes, diff --git a/src/pacman/conf.c b/src/pacman/conf.c index e391735a..fd419529 100644 --- a/src/pacman/conf.c +++ b/src/pacman/conf.c @@ -1132,8 +1132,8 @@ static char *escape_chars(const char *pattern, const char *escape) } /* allocate new string with overflow check */ - if(SIZE_MAX - len < pattern_chars - || !(escaped = malloc(len + pattern_chars))) { + if(SIZE_MAX - len <= pattern_chars + || !(escaped = malloc(len + pattern_chars + 1))) { errno = ENOMEM; return NULL; } diff --git a/test/util/meson.build b/test/util/meson.build index b4046298..71921296 100644 --- a/test/util/meson.build +++ b/test/util/meson.build @@ -5,3 +5,12 @@ test('vercmptest', args : [ join_paths(meson.current_source_dir(), 'vercmptest.sh') ]) + +test('pacman-conf-sysroot-escape', + BASH, + env : TEST_ENV, + protocol : 'tap', + args : [ + join_paths(meson.current_source_dir(), 'pacman-conf-sysroot-escape.sh') + ], + depends : [pacman_conf_bin]) diff --git a/test/util/pacman-conf-sysroot-escape.sh b/test/util/pacman-conf-sysroot-escape.sh new file mode 100755 index 00000000..473c369d --- /dev/null +++ b/test/util/pacman-conf-sysroot-escape.sh @@ -0,0 +1,45 @@ +#!/bin/bash +# +# pacman-conf-sysroot-escape - verify sysroot glob escaping under ASAN +# +# Copyright (c) 2026 Pacman Development Team <pacman-dev(a)lists.archlinux.org> +# +# This program is free software; you can redistribute it and/or modify it under +# the terms of the GNU General Public License as published by the Free Software +# Foundation; either version 2 of the License, or (at your option) any later +# version. +# +# This program is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more +# details. +# +# You should have received a copy of the GNU General Public License along with +# this program. If not, see <http://www.gnu.org/licenses/>. + +source "$(dirname "$0")"/../tap.sh || exit 1 + +bin=${1:-${PMTEST_UTIL_DIR}pacman-conf} + +if ! type -p "$bin" &>/dev/null; then + tap_bail "pacman-conf binary ($bin) could not be located" + exit 1 +fi + +tmpdir=$(mktemp -d) +trap 'rm -rf "$tmpdir"' EXIT + +sysroot="$tmpdir/sys[root" +mkdir -p "$sysroot/etc" "$sysroot/dev" +: > "$sysroot/dev/null" +printf '[options]\nInclude = /dev/null\n' > "$sysroot/etc/pacman.conf" + +tap_plan 2 + +output=$("$bin" --sysroot "$sysroot" --config /etc/pacman.conf RootDir 2>&1) +ret=$? + +tap_is_int "$ret" 0 "pacman-conf parses Include under metachar sysroot" +tap_is_str "$output" "$sysroot/" "pacman-conf preserves the escaped sysroot" + +tap_finish base-commit: a6f7467d8c7c4d7e9cc846884e74c0ab7215c48d -- 2.53.0

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Interest in config option for TLS cert and key?
by nibo 17 Mar '26

17 Mar '26

Hello, I have an idea for a feature that I would like to write and eventually merge into pacman. I post in this mailing list to find out if there is an interest in it before I start coding. My goal is to have a custom repository that can only be used by me. First I tried to create an ssh host in ~/.ssh/config ... ``` Host Custom Hostname custom.org User root Port 1 IdentityFile /path/to/file ``` ... and then use it /etc/pacman.conf ... ``` [custom] Server = ssh://Custom:~/path/to/repo ``` ... but that doesn't work. But https URLs do work. So if I could specify a TLS certificate that is signed by a certificate authority certificate that I control I could use a regular https URL but still be the only one with the required TLS certificate to connect. From what I saw libalpm uses libcurl. libcurl has options like `CURLOPT_SSLCERT` and `CURLOPT_SSLKEY` that can be set with `curl_easy_setopt`. Those two options could be controlled through the pacman configuration file. Maybe there is a better solution already available without changing any code that I overlooked. Maybe you have a different solution to my goal. Maybe you are a maintainer and know that such a feature is not wanted. I'm interested in hearing all these thoughts. Best regards, nibo

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Parallel signature checks
by Isaac Yeo 04 Mar '26

04 Mar '26

Hullo folks, Wonder if I could try implementing parallel package signature checks? On some old systems with large upgrades it'd spend over a minute just checking signatures. Would be a nice qol upgrade imo, is this worth taking a stab at? P.S. I'm new here, pardon if this has been asked before :) - Isaac

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[Git][pacman/pacman][release/7.1.x] Prevent overflow when sorting package download order
by Allan McRae (＠allan) 04 Feb '26

04 Feb '26

Allan McRae pushed to branch release/7.1.x at Pacman / Pacman Commits: cb7452f6 by Allan McRae at 2026-02-05T09:53:42+10:00 Prevent overflow when sorting package download order When comparing the package download size, the difference is cast to an int. This results in an integer overflow for very large packages. Return -1, 0, or 1 to indicate relative size to avoid the overflow. Fixes #305. Signed-off-by: Allan McRae <allan(a)archlinux.org> - - - - - 1 changed file: - lib/libalpm/dload.c View it on GitLab: https://gitlab.archlinux.org/pacman/pacman/-/commit/cb7452f63414291b5206116… -- View it on GitLab: https://gitlab.archlinux.org/pacman/pacman/-/commit/cb7452f63414291b5206116… You're receiving this email because of your account on gitlab.archlinux.org.

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[Git][pacman/pacman][master] Prevent overflow when sorting package download order
by Allan McRae (＠allan) 04 Feb '26

04 Feb '26

Allan McRae pushed to branch master at Pacman / Pacman Commits: a6f7467d by Allan McRae at 2026-01-25T22:50:56+10:00 Prevent overflow when sorting package download order When comparing the package download size, the difference is cast to an int. This results in an integer overflow for very large packages. Return -1, 0, or 1 to indicate relative size to avoid the overflow. Fixes #305. Signed-off-by: Allan McRae <allan(a)archlinux.org> - - - - - 1 changed file: - lib/libalpm/dload.c View it on GitLab: https://gitlab.archlinux.org/pacman/pacman/-/commit/a6f7467d8c7c4d7e9cc8468… -- View it on GitLab: https://gitlab.archlinux.org/pacman/pacman/-/commit/a6f7467d8c7c4d7e9cc8468… You're receiving this email because of your account on gitlab.archlinux.org.

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[Git][pacman/pacman][release/7.1.x] libmakepkg: fix linting of xdata
by Allan McRae (＠allan) 07 Jan '26

07 Jan '26

Allan McRae pushed to branch release/7.1.x at Pacman / Pacman Commits: 54d94116 by Allan McRae at 2026-01-07T21:33:46+10:00 libmakepkg: fix linting of xdata Signed-off-by: Allan McRae <allan(a)archlinux.org> (cherry picked from commit 2979f35840f1adbb04fee2d224d114a079c0e803) - - - - - 1 changed file: - scripts/libmakepkg/lint_pkgbuild/xdata.sh.in View it on GitLab: https://gitlab.archlinux.org/pacman/pacman/-/commit/54d94116164b0b2202c6061… -- View it on GitLab: https://gitlab.archlinux.org/pacman/pacman/-/commit/54d94116164b0b2202c6061… You're receiving this email because of your account on gitlab.archlinux.org.

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[Git][pacman/pacman][master] libmakepkg: fix linting of xdata
by Allan McRae (＠allan) 07 Jan '26

07 Jan '26

Allan McRae pushed to branch master at Pacman / Pacman Commits: 2979f358 by Allan McRae at 2026-01-07T21:30:47+10:00 libmakepkg: fix linting of xdata Signed-off-by: Allan McRae <allan(a)archlinux.org> - - - - - 1 changed file: - scripts/libmakepkg/lint_pkgbuild/xdata.sh.in View it on GitLab: https://gitlab.archlinux.org/pacman/pacman/-/commit/2979f35840f1adbb04fee2d… -- View it on GitLab: https://gitlab.archlinux.org/pacman/pacman/-/commit/2979f35840f1adbb04fee2d… You're receiving this email because of your account on gitlab.archlinux.org.

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[Git][pacman/pacman][release/7.1.x] repo-add: prevent package file deletion with -R is readding a package
by Allan McRae (＠allan) 07 Jan '26

07 Jan '26

Allan McRae pushed to branch release/7.1.x at Pacman / Pacman Commits: 563f038b by Allan McRae at 2026-01-07T10:25:07+10:00 repo-add: prevent package file deletion with -R is readding a package Using "repo-add -R" on a package file that was already present in the repo resulted in the package file being deleted. Given the package file was being readded to the repo, this was likely not the desired outcome. Fixes #294. Signed-off-by: Allan McRae <allan(a)archlinux.org> (cherry picked from commit 5ff7d06b5c63952b2e2e229b7bcdfe58d6c22306) - - - - - 1 changed file: - scripts/repo-add.sh.in View it on GitLab: https://gitlab.archlinux.org/pacman/pacman/-/commit/563f038b27bdd977079bfb5… -- View it on GitLab: https://gitlab.archlinux.org/pacman/pacman/-/commit/563f038b27bdd977079bfb5… You're receiving this email because of your account on gitlab.archlinux.org.

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[Git][pacman/pacman][master] Add Sccache support.
by Allan McRae (＠allan) 07 Jan '26

07 Jan '26

Allan McRae pushed to branch master at Pacman / Pacman Commits: 2c3146dc by Arya Storm at 2026-01-07T10:12:24+10:00 Add Sccache support. - - - - - 10 changed files: - doc/PKGBUILD.5.asciidoc - doc/makepkg.conf.5.asciidoc - etc/makepkg.conf.in - scripts/libmakepkg/buildenv.sh.in - scripts/libmakepkg/buildenv/compiler.sh.in - scripts/libmakepkg/executable/meson.build - + scripts/libmakepkg/executable/sccache.sh.in - scripts/libmakepkg/lint_config/buildenv.sh.in - scripts/makepkg.sh.in - scripts/po/POTFILES.in View it on GitLab: https://gitlab.archlinux.org/pacman/pacman/-/commit/2c3146dcca6ae74d40db141… -- View it on GitLab: https://gitlab.archlinux.org/pacman/pacman/-/commit/2c3146dcca6ae74d40db141… You're receiving this email because of your account on gitlab.archlinux.org.

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