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-rw-r--r--src/notify/notify.c123
1 files changed, 58 insertions, 65 deletions
diff --git a/src/notify/notify.c b/src/notify/notify.c
index f63ec8b..32bd6e6 100644
--- a/src/notify/notify.c
+++ b/src/notify/notify.c
@@ -99,6 +99,18 @@ static pid_t manager_pid(void) {
return pid;
}
+static pid_t pid_parent_if_possible(void) {
+ pid_t parent_pid = getppid();
+
+ /* Don't send from PID 1 or the service manager's PID (which might be distinct from 1, if we are a
+ * --user service). That'd just be confusing for the service manager. */
+ if (parent_pid <= 1 ||
+ parent_pid == manager_pid())
+ return getpid_cached();
+
+ return parent_pid;
+}
+
static int parse_argv(int argc, char *argv[]) {
enum {
@@ -135,7 +147,7 @@ static int parse_argv(int argc, char *argv[]) {
_cleanup_fdset_free_ FDSet *passed = NULL;
bool do_exec = false;
- int c, r, n_env;
+ int c, r;
assert(argc >= 0);
assert(argv);
@@ -163,16 +175,9 @@ static int parse_argv(int argc, char *argv[]) {
break;
case ARG_PID:
- if (isempty(optarg) || streq(optarg, "auto")) {
- arg_pid = getppid();
-
- if (arg_pid <= 1 ||
- arg_pid == manager_pid()) /* Don't send from PID 1 or the service
- * manager's PID (which might be distinct from
- * 1, if we are a --user instance), that'd just
- * be confusing for the service manager */
- arg_pid = getpid_cached();
- } else if (streq(optarg, "parent"))
+ if (isempty(optarg) || streq(optarg, "auto"))
+ arg_pid = pid_parent_if_possible();
+ else if (streq(optarg, "parent"))
arg_pid = getppid();
else if (streq(optarg, "self"))
arg_pid = getpid_cached();
@@ -268,21 +273,12 @@ static int parse_argv(int argc, char *argv[]) {
}
}
- if (optind >= argc &&
- !arg_ready &&
- !arg_stopping &&
- !arg_reloading &&
- !arg_status &&
- !arg_pid &&
- !arg_booted &&
- fdset_isempty(arg_fds)) {
- help();
- return -EINVAL;
- }
-
if (arg_fdname && fdset_isempty(arg_fds))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "No file descriptors passed, but --fdname= set, refusing.");
+ bool have_env = arg_ready || arg_stopping || arg_reloading || arg_status || arg_pid > 0 || !fdset_isempty(arg_fds);
+ size_t n_arg_env;
+
if (do_exec) {
int i;
@@ -293,18 +289,32 @@ static int parse_argv(int argc, char *argv[]) {
if (i >= argc)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "If --exec is used argument list must contain ';' separator, refusing.");
if (i+1 == argc)
- return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Empty command line specified after ';' separator, refusing");
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Empty command line specified after ';' separator, refusing.");
arg_exec = strv_copy_n(argv + i + 1, argc - i - 1);
if (!arg_exec)
return log_oom();
- n_env = i - optind;
+ n_arg_env = i - optind;
} else
- n_env = argc - optind;
+ n_arg_env = argc - optind;
+
+ have_env = have_env || n_arg_env > 0;
+
+ if (!have_env && !arg_booted) {
+ if (do_exec)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "No notify message specified while --exec, refusing.");
- if (n_env > 0) {
- arg_env = strv_copy_n(argv + optind, n_env);
+ /* No argument at all? */
+ help();
+ return -EINVAL;
+ }
+
+ if (have_env && arg_booted)
+ log_warning("Notify message specified along with --booted, ignoring.");
+
+ if (n_arg_env > 0) {
+ arg_env = strv_copy_n(argv + optind, n_arg_env);
if (!arg_env)
return log_oom();
}
@@ -316,16 +326,13 @@ static int parse_argv(int argc, char *argv[]) {
}
static int run(int argc, char* argv[]) {
- _cleanup_free_ char *status = NULL, *cpid = NULL, *n = NULL, *monotonic_usec = NULL, *fdn = NULL;
+ _cleanup_free_ char *status = NULL, *cpid = NULL, *msg = NULL, *monotonic_usec = NULL, *fdn = NULL;
_cleanup_strv_free_ char **final_env = NULL;
- char* our_env[9];
+ const char *our_env[9];
size_t i = 0;
- pid_t source_pid;
int r;
- log_show_color(true);
- log_parse_environment();
- log_open();
+ log_setup();
r = parse_argv(argc, argv);
if (r <= 0)
@@ -342,7 +349,7 @@ static int run(int argc, char* argv[]) {
}
if (arg_reloading) {
- our_env[i++] = (char*) "RELOADING=1";
+ our_env[i++] = "RELOADING=1";
if (asprintf(&monotonic_usec, "MONOTONIC_USEC=" USEC_FMT, now(CLOCK_MONOTONIC)) < 0)
return log_oom();
@@ -351,10 +358,10 @@ static int run(int argc, char* argv[]) {
}
if (arg_ready)
- our_env[i++] = (char*) "READY=1";
+ our_env[i++] = "READY=1";
if (arg_stopping)
- our_env[i++] = (char*) "STOPPING=1";
+ our_env[i++] = "STOPPING=1";
if (arg_status) {
status = strjoin("STATUS=", arg_status);
@@ -372,7 +379,7 @@ static int run(int argc, char* argv[]) {
}
if (!fdset_isempty(arg_fds)) {
- our_env[i++] = (char*) "FDSTORE=1";
+ our_env[i++] = "FDSTORE=1";
if (arg_fdname) {
fdn = strjoin("FDNAME=", arg_fdname);
@@ -385,15 +392,13 @@ static int run(int argc, char* argv[]) {
our_env[i++] = NULL;
- final_env = strv_env_merge(our_env, arg_env);
+ final_env = strv_env_merge((char**) our_env, arg_env);
if (!final_env)
return log_oom();
+ assert(!strv_isempty(final_env));
- if (strv_isempty(final_env))
- return 0;
-
- n = strv_join(final_env, "\n");
- if (!n)
+ msg = strv_join(final_env, "\n");
+ if (!msg)
return log_oom();
/* If this is requested change to the requested UID/GID. Note that we only change the real UID here, and leave
@@ -408,20 +413,13 @@ static int run(int argc, char* argv[]) {
setreuid(arg_uid, UID_INVALID) < 0)
return log_error_errno(errno, "Failed to change UID: %m");
- if (arg_pid > 0)
- source_pid = arg_pid;
- else {
- /* Pretend the message originates from our parent, given that we are typically called from a
- * shell script, i.e. we are not the main process of a service but only a child of it. */
- source_pid = getppid();
- if (source_pid <= 1 ||
- source_pid == manager_pid()) /* safety check: don't claim we'd send anything from PID 1
- * or the service manager itself */
- source_pid = 0;
- }
+ /* If --pid= is explicitly specified, use it as source pid. Otherwise, pretend the message originates
+ * from our parent, i.e. --pid=auto */
+ if (arg_pid <= 0)
+ arg_pid = pid_parent_if_possible();
if (fdset_isempty(arg_fds))
- r = sd_pid_notify(source_pid, /* unset_environment= */ false, n);
+ r = sd_pid_notify(arg_pid, /* unset_environment= */ false, msg);
else {
_cleanup_free_ int *a = NULL;
int k;
@@ -430,7 +428,7 @@ static int run(int argc, char* argv[]) {
if (k < 0)
return log_error_errno(k, "Failed to convert file descriptor set to array: %m");
- r = sd_pid_notify_with_fds(source_pid, /* unset_environment= */ false, n, a, k);
+ r = sd_pid_notify_with_fds(arg_pid, /* unset_environment= */ false, msg, a, k);
}
if (r < 0)
@@ -442,7 +440,7 @@ static int run(int argc, char* argv[]) {
arg_fds = fdset_free(arg_fds); /* Close before we execute anything */
if (!arg_no_block) {
- r = sd_pid_notify_barrier(source_pid, /* unset_environment= */ false, 5 * USEC_PER_SEC);
+ r = sd_pid_notify_barrier(arg_pid, /* unset_environment= */ false, 5 * USEC_PER_SEC);
if (r < 0)
return log_error_errno(r, "Failed to invoke barrier: %m");
if (r == 0)
@@ -451,15 +449,10 @@ static int run(int argc, char* argv[]) {
}
if (arg_exec) {
- _cleanup_free_ char *cmdline = NULL;
-
execvp(arg_exec[0], arg_exec);
- cmdline = strv_join(arg_exec, " ");
- if (!cmdline)
- return log_oom();
-
- return log_error_errno(errno, "Failed to execute command line: %s", cmdline);
+ _cleanup_free_ char *cmdline = strv_join(arg_exec, " ");
+ return log_error_errno(errno, "Failed to execute command line: %s", strnull(cmdline));
}
/* The DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE() boilerplate will send the exit status via
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 08:19:42 +0000