diff options
author | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-09 03:13:06 -0400 |
---|---|---|
committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-09 03:13:06 -0400 |
commit | 8231d17032fdd535e58c5aead8eae3f6cbc048b5 (patch) | |
tree | 799df8c0f203b8369b602155d3233bc9661772db /src/grp-machine/libmachine-core/operation.c | |
parent | c533334ea105130b806b2a89512b3ff131ffc3bc (diff) |
./move.sh
Diffstat (limited to 'src/grp-machine/libmachine-core/operation.c')
-rw-r--r-- | src/grp-machine/libmachine-core/operation.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/src/grp-machine/libmachine-core/operation.c b/src/grp-machine/libmachine-core/operation.c new file mode 100644 index 0000000000..e6ddc41a55 --- /dev/null +++ b/src/grp-machine/libmachine-core/operation.c @@ -0,0 +1,131 @@ +/*** + This file is part of systemd. + + Copyright 2016 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include "alloc-util.h" +#include "fd-util.h" +#include "operation.h" +#include "process-util.h" + +static int operation_done(sd_event_source *s, const siginfo_t *si, void *userdata) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + Operation *o = userdata; + int r; + + assert(o); + assert(si); + + log_debug("Operating " PID_FMT " is now complete with with code=%s status=%i", + o->pid, + sigchld_code_to_string(si->si_code), si->si_status); + + o->pid = 0; + + if (si->si_code != CLD_EXITED) { + r = sd_bus_error_setf(&error, SD_BUS_ERROR_FAILED, "Child died abnormally."); + goto fail; + } + + if (si->si_status != EXIT_SUCCESS) { + if (read(o->errno_fd, &r, sizeof(r)) == sizeof(r)) + r = sd_bus_error_set_errnof(&error, r, "%m"); + else + r = sd_bus_error_setf(&error, SD_BUS_ERROR_FAILED, "Child failed."); + + goto fail; + } + + r = sd_bus_reply_method_return(o->message, NULL); + if (r < 0) + log_error_errno(r, "Failed to reply to message: %m"); + + operation_free(o); + return 0; + +fail: + r = sd_bus_reply_method_error(o->message, &error); + if (r < 0) + log_error_errno(r, "Failed to reply to message: %m"); + + operation_free(o); + return 0; +} + +int operation_new(Manager *manager, Machine *machine, pid_t child, sd_bus_message *message, int errno_fd) { + Operation *o; + int r; + + assert(manager); + assert(child > 1); + assert(message); + assert(errno_fd >= 0); + + o = new0(Operation, 1); + if (!o) + return -ENOMEM; + + r = sd_event_add_child(manager->event, &o->event_source, child, WEXITED, operation_done, o); + if (r < 0) { + free(o); + return r; + } + + o->pid = child; + o->message = sd_bus_message_ref(message); + o->errno_fd = errno_fd; + + LIST_PREPEND(operations, manager->operations, o); + manager->n_operations++; + o->manager = manager; + + if (machine) { + LIST_PREPEND(operations_by_machine, machine->operations, o); + o->machine = machine; + } + + log_debug("Started new operation " PID_FMT ".", child); + + /* At this point we took ownership of both the child and the errno file descriptor! */ + + return 0; +} + +Operation *operation_free(Operation *o) { + if (!o) + return NULL; + + sd_event_source_unref(o->event_source); + + safe_close(o->errno_fd); + + if (o->pid > 1) + (void) sigkill_wait(o->pid); + + sd_bus_message_unref(o->message); + + if (o->manager) { + LIST_REMOVE(operations, o->manager->operations, o); + o->manager->n_operations--; + } + + if (o->machine) + LIST_REMOVE(operations_by_machine, o->machine->operations, o); + + free(o); + return NULL; +} |