Use `grep &>/dev/null` instead of `grep -q` when operating on piped stdin.

`grep -q` may exit as soon as it finds a match; this is a good optimization
for when the input is a file.  However, if the input is the output of
another program, then that other program will receive SIGPIPE, and further
writes will fail.  When this happens, it might (bsdtar does) print a
message about a "write error" to stderr.  Which is going to confuse and
alarm the user.

I'll add that this is not purely hypothetical--it has happened to me while
running the test suite.

4 files changed, 12 insertions, 12 deletions

diff --git a/db-functions b/db-functions
index 5fe86b6..4eebf4a 100644
--- a/db-functions
+++ b/db-functions
@@ -364,7 +364,7 @@ check_pkgfile() {
 
 	in_array "${pkgarch}" "${ARCHES[@]}" 'any' || return 1
 
-	if echo "${pkgfile##*/}" | grep -q "${pkgname}-${pkgver}-${pkgarch}"; then
+	if echo "${pkgfile##*/}" | grep "${pkgname}-${pkgver}-${pkgarch}" &>/dev/null; then
 		return 0
 	else
 		return 1
diff --git a/test/lib/common.inc b/test/lib/common.inc
index 5b06616..83c54bd 100644
--- a/test/lib/common.inc
+++ b/test/lib/common.inc
@@ -177,7 +177,7 @@ checkAnyPackageDB() {
 
 		for db in "${DBEXT}" "${FILESEXT}"; do
 			( [ -r "${FTP_BASE}/${repo}/os/${arch}/${repo}${db%.tar.*}" ] \
-				&& bsdtar -xf "${FTP_BASE}/${repo}/os/${arch}/${repo}${db%.tar.*}" -O | grep -q "${pkg}") \
+				&& bsdtar -xf "${FTP_BASE}/${repo}/os/${arch}/${repo}${db%.tar.*}" -O | grep "${pkg}" &>/dev/null) \
 				|| fail "${pkg} not in ${repo}/os/${arch}/${repo}${db%.tar.*}"
 		done
 	done
@@ -221,7 +221,7 @@ checkPackageDB() {
 
 	for db in "${DBEXT}" "${FILESEXT}"; do
 		( [ -r "${FTP_BASE}/${repo}/os/${arch}/${repo}${db%.tar.*}" ] \
-			&& bsdtar -xf "${FTP_BASE}/${repo}/os/${arch}/${repo}${db%.tar.*}" -O | grep -q "${pkg}") \
+			&& bsdtar -xf "${FTP_BASE}/${repo}/os/${arch}/${repo}${db%.tar.*}" -O | grep "${pkg}" &>/dev/null) \
 			|| fail "${pkg} not in ${repo}/os/${arch}/${repo}${db%.tar.*}"
 	done
 }
@@ -247,7 +247,7 @@ checkRemovedPackageDB() {
 
 	for db in "${DBEXT}" "${FILESEXT}"; do
 		( [ -r "${FTP_BASE}/${repo}/os/${arch}/${repo}${db%.tar.*}" ] \
-			&& bsdtar -xf "${FTP_BASE}/${repo}/os/${arch}/${repo}${db%.tar.*}" -O | grep -q "${pkgbase}") \
+			&& bsdtar -xf "${FTP_BASE}/${repo}/os/${arch}/${repo}${db%.tar.*}" -O | grep "${pkgbase}" &>/dev/null) \
 			&& fail "${pkgbase} should not be in ${repo}/os/${arch}/${repo}${db%.tar.*}"
 	done
 }
@@ -273,7 +273,7 @@ checkRemovedAnyPackageDB() {
 	for db in "${DBEXT}" "${FILESEXT}"; do
 		for arch in "${ARCH_BUILD[@]}"; do
 			( [ -r "${FTP_BASE}/${repo}/os/${arch}/${repo}${db%.tar.*}" ] \
-				&& bsdtar -xf "${FTP_BASE}/${repo}/os/${arch}/${repo}${db%.tar.*}" -O | grep -q "${pkgbase}") \
+				&& bsdtar -xf "${FTP_BASE}/${repo}/os/${arch}/${repo}${db%.tar.*}" -O | grep "${pkgbase}" &>/dev/null) \
 				&& fail "${pkgbase} should not be in ${repo}/os/${arch}/${repo}${db%.tar.*}"
 		done
 	done
diff --git a/test/test.d/create-filelists.sh b/test/test.d/create-filelists.sh
index e16a8d1..be66fc2 100755
--- a/test/test.d/create-filelists.sh
+++ b/test/test.d/create-filelists.sh
@@ -17,7 +17,7 @@ testCreateSimpleFileLists() {
 
 	for pkgbase in "${pkgs[@]}"; do
 		for arch in "${ARCH_BUILD[@]}"; do
-			if ! bsdtar -xOf "${FTP_BASE}/extra/os/${arch}/extra${FILESEXT}" | grep -q "usr/bin/${pkgbase}"; then
+			if ! bsdtar -xOf "${FTP_BASE}/extra/os/${arch}/extra${FILESEXT}" | grep "usr/bin/${pkgbase}" &>/dev/null; then
 				fail "usr/bin/${pkgbase} not found in ${arch}/extra${FILESEXT}"
 			fi
 		done
@@ -36,7 +36,7 @@ testCreateAnyFileLists() {
 
 	for pkgbase in "${pkgs[@]}"; do
 		for arch in "${ARCH_BUILD[@]}"; do
-			if ! bsdtar -xOf "${FTP_BASE}/extra/os/${arch}/extra${FILESEXT}" | grep -q "usr/share/${pkgbase}/test"; then
+			if ! bsdtar -xOf "${FTP_BASE}/extra/os/${arch}/extra${FILESEXT}" | grep "usr/share/${pkgbase}/test" &>/dev/null; then
 				fail "usr/share/${pkgbase}/test not found in ${arch}/extra${FILESEXT}"
 			fi
 		done
@@ -62,7 +62,7 @@ testCreateSplitFileLists() {
 		pkgnames=($(source "${TMP}/svn-packages-copy/${pkgbase}/trunk/PKGBUILD"; echo ${pkgname[@]}))
 		for pkgname in "${pkgnames[@]}"; do
 			for arch in "${ARCH_BUILD[@]}"; do
-				if ! bsdtar -xOf "${FTP_BASE}/extra/os/${arch}/extra${FILESEXT}" | grep -q "usr/bin/${pkgname}"; then
+				if ! bsdtar -xOf "${FTP_BASE}/extra/os/${arch}/extra${FILESEXT}" | grep "usr/bin/${pkgname}" &>/dev/null; then
 					fail "usr/bin/${pkgname} not found in ${arch}/extra${FILESEXT}"
 				fi
 			done
@@ -88,10 +88,10 @@ testCleanupFileLists() {
 	done
 
 	for arch in "${ARCH_BUILD[@]}"; do
-		if ! bsdtar -xOf "${FTP_BASE}/extra/os/${arch}/extra${FILESEXT}" | grep -q "usr/bin/pkg-simple-b"; then
+		if ! bsdtar -xOf "${FTP_BASE}/extra/os/${arch}/extra${FILESEXT}" | grep "usr/bin/pkg-simple-b" &>/dev/null; then
 			fail "usr/bin/pkg-simple-b not found in ${arch}/extra${FILESEXT}"
 		fi
-		if bsdtar -xOf "${FTP_BASE}/extra/os/${arch}/extra${FILESEXT}" | grep -q "usr/bin/pkg-simple-a"; then
+		if bsdtar -xOf "${FTP_BASE}/extra/os/${arch}/extra${FILESEXT}" | grep "usr/bin/pkg-simple-a" &>/dev/null; then
 			fail "usr/bin/pkg-simple-a still found in ${arch}/extra${FILESEXT}"
 		fi
 	done
diff --git a/test/test.d/db-update.sh b/test/test.d/db-update.sh
index 48c243d..9e44970 100755
--- a/test/test.d/db-update.sh
+++ b/test/test.d/db-update.sh
@@ -132,7 +132,7 @@ testUpdateSameAnyPackageToDifferentRepositories() {
 	local arch
 	for arch in i686 x86_64; do
 		( [ -r "${FTP_BASE}/testing/os/${arch}/testing${DBEXT%.tar.*}" ] \
-			&& bsdtar -xf "${FTP_BASE}/testing/os/${arch}/testing${DBEXT%.tar.*}" -O | grep -q "${pkgbase}") \
+			&& bsdtar -xf "${FTP_BASE}/testing/os/${arch}/testing${DBEXT%.tar.*}" -O | grep "${pkgbase}" &>/dev/null) \
 			&& fail "${pkgbase} should not be in testing/os/${arch}/testing${DBEXT%.tar.*}"
 	done
 }
@@ -154,7 +154,7 @@ testAddIncompleteSplitPackage() {
 
 	for arch in "${ARCH_BUILD[@]}"; do
 		( [ -r "${FTP_BASE}/${repo}/os/${arch}/${repo}${DBEXT%.tar.*}" ] \
-		&& bsdtar -xf "${FTP_BASE}/${repo}/os/${arch}/${repo}${DBEXT%.tar.*}" -O | grep -q "${pkgbase}") \
+		&& bsdtar -xf "${FTP_BASE}/${repo}/os/${arch}/${repo}${DBEXT%.tar.*}" -O | grep "${pkgbase}" &>/dev/null) \
 		&& fail "${pkgbase} should not be in ${repo}/os/${arch}/${repo}${DBEXT%.tar.*}"
 	done
 }