If poll() is interrupted by a signal, alpm was closing the socket it
uses for listening to script/hook output. This would drop script output
at the least and kill the script at the worst.
Fixes FS#60396
Signed-off-by: Andrew Gregory <andrew.gregor...@gmail.com>
---
lib/libalpm/util.c | 10 +++++++++-
test/pacman/tests/TESTS | 1 +
test/pacman/tests/scriptlet-signal-handling.py | 15 +++++++++++++++
3 files changed, 25 insertions(+), 1 deletion(-)
create mode 100644 test/pacman/tests/scriptlet-signal-handling.py
diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index eaf85e93..d33eef2a 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -665,6 +665,7 @@ int _alpm_run_chroot(alpm_handle_t *handle, const char
*cmd, char *const argv[],
ssize_t olen = 0, ilen = 0;
nfds_t nfds = 2;
struct pollfd fds[2], *child2parent = &(fds[0]), *parent2child
= &(fds[1]);
+ int poll_ret;
child2parent->fd = child2parent_pipefd[TAIL];
child2parent->events = POLLIN;
@@ -685,7 +686,14 @@ int _alpm_run_chroot(alpm_handle_t *handle, const char
*cmd, char *const argv[],
#define STOP_POLLING(p) do { close(p->fd); p->fd = -1; } while(0)
while((child2parent->fd != -1 || parent2child->fd != -1)
- && poll(fds, nfds, -1) > 0) {
+ && (poll_ret = poll(fds, nfds, -1)) != 0) {
+ if(poll_ret == -1) {
+ if(errno == EINTR) {
+ continue;
+ } else {
+ break;
+ }
+ }
if(child2parent->revents & POLLIN) {
if(_alpm_chroot_read_from_child(handle,
child2parent->fd,
ibuf, &ilen,
sizeof(ibuf)) != 0) {
diff --git a/test/pacman/tests/TESTS b/test/pacman/tests/TESTS
index 5deb93c4..dc0b4ec3 100644
--- a/test/pacman/tests/TESTS
+++ b/test/pacman/tests/TESTS
@@ -150,6 +150,7 @@ TESTS += test/pacman/tests/replace102.py
TESTS += test/pacman/tests/replace103.py
TESTS += test/pacman/tests/replace104.py
TESTS += test/pacman/tests/replace110.py
+TESTS += test/pacman/tests/scriptlet-signal-handling.py
TESTS += test/pacman/tests/scriptlet-signal-reset.py
TESTS += test/pacman/tests/scriptlet001.py
TESTS += test/pacman/tests/scriptlet002.py
diff --git a/test/pacman/tests/scriptlet-signal-handling.py
b/test/pacman/tests/scriptlet-signal-handling.py
new file mode 100644
index 00000000..e65df55b
--- /dev/null
+++ b/test/pacman/tests/scriptlet-signal-handling.py
@@ -0,0 +1,15 @@
+self.description = "Handle signal interrupts while running scriptlets/hooks"
+
+p1 = pmpkg("dummy")
+p1.install['post_install'] = """
+ kill -INT $PPID # send an arbitrary signal that pacman catches
+ sleep 1 # give alpm time to close the socket if EINTR was not
handled
+ echo to-parent # if the interrupt is not handled this will die with
SIGPIPE
+ echo success > interrupt_was_handled
+ """
+self.addpkg(p1)
+
+self.args = "-U %s" % p1.filename()
+
+self.addrule("PACMAN_RETCODE=0")
+self.addrule("FILE_EXIST=interrupt_was_handled")
--
2.19.0
