SymbX/systemd
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add ExtraFileDescriptor property to StartTransientUnit dbus API

Browse Source 
This adds the ExtraFileDescriptor property to StartTransient dbus API
with format "a(hs)" - array of (file descriptor, name) pairs. The FD
will be passed to the unit via sd_notify like Socket and OpenFile.

systemctl show also shows ExtraFileDescriptorName for these transient
units. We only show the name passed to dbus as the FD numbers will
change once passed over the unix socket and are duplicated, so its
confusing to display the numbers.

We do not add this functionality for systemd-run or general systemd
service units as it is not useful for general systemd services.
Arguably, it could be useful for systemd-run in bash scripts but we
prefer to be cautious and not expose the API yet.

Fixes: #34396
This commit is contained in:
Ryan Wilson
2024-10-07 09:01:48 -07:00
parent f88813b71a
commit 3543456f84
11 changed files with 316 additions and 46 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/core/exec-invoke.c
+5 -4
View File
@@ -3912,7 +3912,7 @@ static int exec_context_named_iofds(
for (size_t i = 0; i < 3; i++)
stdio_fdname[i] = exec_context_fdname(c, i);
n_fds = p->n_storage_fds + p->n_socket_fds;
n_fds = p->n_storage_fds + p->n_socket_fds + p->n_extra_fds;
for (size_t i = 0; i < n_fds && targets > 0; i++)
if (named_iofds[STDIN_FILENO] < 0 &&
@@ -4096,7 +4096,7 @@ int exec_invoke(
int ngids_after_pam = 0;
int socket_fd = -EBADF, named_iofds[3] = EBADF_TRIPLET;
size_t n_storage_fds, n_socket_fds;
size_t n_storage_fds, n_socket_fds, n_extra_fds;
assert(command);
assert(context);
@@ -4133,12 +4133,13 @@ int exec_invoke(
return log_exec_error_errno(context, params, SYNTHETIC_ERRNO(EINVAL), "Got no socket.");
socket_fd = params->fds[0];
n_storage_fds = n_socket_fds = 0;
n_storage_fds = n_socket_fds = n_extra_fds = 0;
} else {
n_socket_fds = params->n_socket_fds;
n_storage_fds = params->n_storage_fds;
n_extra_fds = params->n_extra_fds;
}
n_fds = n_socket_fds + n_storage_fds;
n_fds = n_socket_fds + n_storage_fds + n_extra_fds;
r = exec_context_named_iofds(context, params, named_iofds);
if (r < 0)