From f6bf84ac789c430ef71123c35a91d70d8162e9b9 Mon Sep 17 00:00:00 2001
From: Hristo Venev <hristo@venev.name>
Date: Sun, 14 Apr 2024 17:38:19 +0300
Subject: Package for Fedora

---
 .gitignore             |  1 +
 build-rpm.sh           | 14 ++++++++++++++
 dist/fedora/pgbak.spec | 33 +++++++++++++++++++++++++++++++++
 etc/systemd-pgbak.conf |  3 +++
 pgbak.c                | 18 +++++++++++++-----
 5 files changed, 64 insertions(+), 5 deletions(-)
 create mode 100755 build-rpm.sh
 create mode 100644 dist/fedora/pgbak.spec
 create mode 100644 etc/systemd-pgbak.conf

diff --git a/.gitignore b/.gitignore
index cf6b926..35794aa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /pgbak
+/build
diff --git a/build-rpm.sh b/build-rpm.sh
new file mode 100755
index 0000000..bd63808
--- /dev/null
+++ b/build-rpm.sh
@@ -0,0 +1,14 @@
+#!/bin/bash
+set -ex
+version=$(sed -n 's/^Version: *\([0-9.]\+\)$/\1/p' < dist/fedora/pgbak.spec)
+[[ -n "$version" ]]
+if [[ -d "build" ]]; then
+	rm -r build
+fi
+mkdir build build/{src,rpms,srpms}
+git archive --prefix="pgbak-$version/" HEAD > "build/src/pgbak-$version.tar.xz"
+rpmbuild \
+	-D"_sourcedir $PWD/build/src" \
+	-D"_srcrpmdir $PWD/build/srpms" \
+	-D"_rpmdir $PWD/build/rpms" \
+	-ba dist/fedora/pgbak.spec
diff --git a/dist/fedora/pgbak.spec b/dist/fedora/pgbak.spec
new file mode 100644
index 0000000..823e9a9
--- /dev/null
+++ b/dist/fedora/pgbak.spec
@@ -0,0 +1,33 @@
+Name:           pgbak
+Version:        0.0.1
+Release:        %autorelease
+Summary:        A robust WAL archiver for PostgreSQL
+
+License:        LGPL-3.0-or-later
+URL:            https://git.venev.name/hristo/pgbak/about/
+Source0:        pgbak-%{version}.tar.xz
+
+BuildRequires:  make
+BuildRequires:  gcc
+
+%description
+pgbak is a robust WAL archiver for PostgreSQL. It automates compression as well as the creation of full snapshots.
+
+
+%prep
+%autosetup
+
+%build
+%make_build
+
+
+%install
+install -Dm755 -t "$RPM_BUILD_ROOT"%{_bindir} pgbak
+install -Dm755 etc/systemd-pgbak.conf "$RPM_BUILD_ROOT"%{_unitdir}/postgresql.service.d/10-pgbak.conf
+
+
+%files
+%{_bindir}/pgbak
+%{_unitdir}/postgresql.service.d/10-pgbak.conf
+%license LICENSE LICENSE.GPL3
+%doc README.md
diff --git a/etc/systemd-pgbak.conf b/etc/systemd-pgbak.conf
new file mode 100644
index 0000000..dd841c9
--- /dev/null
+++ b/etc/systemd-pgbak.conf
@@ -0,0 +1,3 @@
+[Service]
+Environment=PGBAK=/var/lib/pgsql/backups
+ExecStopPost=-/usr/bin/pgbak try-wait 60
diff --git a/pgbak.c b/pgbak.c
index 3fed5eb..c3d84d5 100644
--- a/pgbak.c
+++ b/pgbak.c
@@ -660,20 +660,28 @@ int main(int argc, char **argv) {
 		return 1;
 	}
 
+	const char *op = argv[1];
+	bool is_try_wait = !strcmp(op, "try-wait");
+
 	backup_dfd = open(backup_dir, O_RDONLY | O_DIRECTORY | O_CLOEXEC);
 	if(backup_dfd < 0) {
+		if(is_try_wait && errno == ENOENT) {
+			return 0;
+		}
 		fprintf(stderr, "Failed to open $PGBAK directory '%s': %m\n", backup_dir);
 		return 1;
 	}
 
-	lck_fd = openat(backup_dfd, "pgbak.lock", O_RDWR | O_CREAT | O_CLOEXEC, 0600);
+	int lck_flags = O_RDWR | (is_try_wait ? 0 : O_CREAT) | O_CLOEXEC;
+	lck_fd = openat(backup_dfd, "pgbak.lock", lck_flags, 0600);
 	if(lck_fd < 0) {
+		if(is_try_wait && errno == ENOENT) {
+			return 0;
+		}
 		fprintf(stderr, "Failed to open $PGBAK/pgbak.lock: %m\n");
-		_Exit(1);
+		return 1;
 	}
 
-	const char *op = argv[1];
-
 	if(!strcmp(op, "wal")) {
 		if(argc != 3) goto usage;
 		return cmd_wal(argv[2]);
@@ -694,7 +702,7 @@ int main(int argc, char **argv) {
 		return cmd_sync(true, true);
 	}
 
-	if(!strcmp(op, "wait")) {
+	if(is_try_wait || !strcmp(op, "wait")) {
 		if(argc != 2 && argc != 3) goto usage;
 		long timeout = -1;
 		if(argc > 2) {
-- 
cgit