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From 9b655d805e78a314a24b8493c6c116a4d943beb9 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Fri, 11 Mar 2022 14:27:46 +0100
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Subject: [PATCH] install: when linking a file, create the link first or abort
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We'd create aliases and other symlinks first, and only then try to create
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the main link. Since that can fail, let's do things in opposite order, and
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abort immediately if we can't link the file itself.
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(cherry picked from commit 20d68b3aec62110351bdc695fd1a55adcf3a6ee5)
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Related: #2082131
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---
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src/shared/install.c | 12 +++++++-----
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test/test-systemctl-enable.sh | 9 +++------
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2 files changed, 10 insertions(+), 11 deletions(-)
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diff --git a/src/shared/install.c b/src/shared/install.c
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index 785ef55dbd..fadd2be248 100644
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--- a/src/shared/install.c
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+++ b/src/shared/install.c
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@@ -1985,6 +1985,13 @@ static int install_info_apply(
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bool force = file_flags & UNIT_FILE_FORCE;
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+ r = install_info_symlink_link(info, lp, config_path, force, changes, n_changes);
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+ /* Do not count links to the unit file towards the "carries_install_info" count */
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+ if (r < 0)
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+ /* If linking of the file failed, do not try to create other symlinks,
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+ * because they might would pointing to a non-existent or wrong unit. */
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+ return r;
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+
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r = install_info_symlink_alias(scope, info, lp, config_path, force, changes, n_changes);
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q = install_info_symlink_wants(scope, file_flags, info, lp, config_path, info->wanted_by, ".wants/", changes, n_changes);
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@@ -1995,11 +2002,6 @@ static int install_info_apply(
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if (r == 0)
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r = q;
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- q = install_info_symlink_link(info, lp, config_path, force, changes, n_changes);
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- /* Do not count links to the unit file towards the "carries_install_info" count */
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- if (r == 0 && q < 0)
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- r = q;
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-
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return r;
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}
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diff --git a/test/test-systemctl-enable.sh b/test/test-systemctl-enable.sh
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index 3aa61222a8..c1fb9626ab 100644
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--- a/test/test-systemctl-enable.sh
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+++ b/test/test-systemctl-enable.sh
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@@ -173,12 +173,9 @@ islink "$root/etc/systemd/system/link1.path" "/link1.path"
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islink "$root/etc/systemd/system/paths.target.wants/link1.path" "/link1.path"
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: -------enable already linked different path-----------------
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-# FIXME
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-# "$systemctl" --root="$root" enable '/subdir/link1.path' && { echo "Expected failure" >&2; exit 1; }
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-# test -h "$root/etc/systemd/system/link1.path"
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-# readlink "$root/etc/systemd/system/link1.path"
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-# test -h "$root/etc/systemd/system/paths.target.wants/link1.path"
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-# readlink "$root/etc/systemd/system/paths.target.wants/link1.path"
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+"$systemctl" --root="$root" enable '/subdir/link1.path' && { echo "Expected failure" >&2; exit 1; }
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+islink "$root/etc/systemd/system/link1.path" "/link1.path"
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+islink "$root/etc/systemd/system/paths.target.wants/link1.path" "/link1.path"
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: -------enable bad suffix------------------------------------
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cp "$root/link1.path" "$root/subdir/link1.suffix"
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