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libsystemd: expand with with some common sd-daemon(3) functions

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Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg
2025-07-02 16:43:42 +02:00
parent da83462731
commit a7b8e1b94d
2 changed files with 155 additions and 0 deletions
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libsystemd/sd-daemon.c
+133
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@@ -14,6 +14,7 @@
#include <inttypes.h>
#include <signal.h>
#include <stdbool.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
@@ -23,6 +24,8 @@
#include <time.h>
#include <unistd.h>
#include "sd-daemon.h"
/*
* NOTE: As per spec., this function does not return POSIX OK(0) but
* rather "a positive value", i.e., 1.
@@ -82,3 +85,133 @@ int sd_notify(int unset_environment, const char *state)
return 1;
}
/*
* Printf-style notification function
*/
int sd_notifyf(int unset_environment, const char *format, ...)
{
va_list ap;
char *state;
int ret;
if (!format)
return -EINVAL;
va_start(ap, format);
ret = vasprintf(&state, format, ap);
va_end(ap);
if (ret < 0)
return -ENOMEM;
ret = sd_notify(unset_environment, state);
free(state);
return ret;
}
/*
* PID-specific notification function
*/
int sd_pid_notify(pid_t pid, int unset_environment, const char *state)
{
char path[256], *env;
size_t len;
int ret;
if (!state)
return -EINVAL;
len = strlen(state);
if (len == 0)
return -EINVAL;
if (pid == 0)
pid = getpid();
env = getenv("NOTIFY_SOCKET");
if (env) {
env = strdup(env);
if (!env)
return -errno;
}
snprintf(path, sizeof(path), "@run/finit/notify/%d", pid);
setenv("NOTIFY_SOCKET", path, 1);
ret = sd_notify(unset_environment, state);
if (env) {
setenv("NOTIFY_SOCKET", env, 1);
free(env);
}
return ret;
}
/*
* PID-specific printf-style notification function
*/
int sd_pid_notifyf(pid_t pid, int unset_environment, const char *format, ...)
{
va_list ap;
char *state;
int ret;
if (!format)
return -EINVAL;
va_start(ap, format);
ret = vasprintf(&state, format, ap);
va_end(ap);
if (ret < 0)
return -ENOMEM;
ret = sd_pid_notify(pid, unset_environment, state);
free(state);
return ret;
}
/*
* Socket activation stub - Finit doesn't support socket activation yet
* Returns 0 (no file descriptors passed)
*/
int sd_listen_fds(int unset_environment)
{
if (unset_environment) {
unsetenv("LISTEN_PID");
unsetenv("LISTEN_FDS");
unsetenv("LISTEN_FDNAMES");
}
return 0;
}
/*
* Watchdog stub - Finit doesn't support watchdog yet
* Returns 0 (no watchdog enabled)
*/
int sd_watchdog_enabled(int unset_environment, uint64_t *usec)
{
if (unset_environment) {
unsetenv("WATCHDOG_PID");
unsetenv("WATCHDOG_USEC");
}
if (usec)
*usec = 0;
return 0;
}
/*
* System detection function
* Returns 1 to indicate systemd compatibility (trick applications)
*/
int sd_booted(void)
{
return 1;
}