diff options
Diffstat (limited to 'openbsd-compat/port-linux.c')
| -rw-r--r-- | openbsd-compat/port-linux.c | 98 |
1 files changed, 96 insertions, 2 deletions
diff --git a/openbsd-compat/port-linux.c b/openbsd-compat/port-linux.c index 0457e28..4c024c6 100644 --- a/openbsd-compat/port-linux.c +++ b/openbsd-compat/port-linux.c @@ -21,16 +21,24 @@ #include "includes.h" -#if defined(WITH_SELINUX) || defined(LINUX_OOM_ADJUST) +#if defined(WITH_SELINUX) || defined(LINUX_OOM_ADJUST) || \ + defined(SYSTEMD_NOTIFY) +#include <sys/socket.h> +#include <sys/un.h> + #include <errno.h> +#include <inttypes.h> #include <stdarg.h> #include <string.h> #include <stdio.h> #include <stdlib.h> +#include <time.h> +#include <unistd.h> #include "log.h" #include "xmalloc.h" #include "port-linux.h" +#include "misc.h" #ifdef WITH_SELINUX #include <selinux/selinux.h> @@ -310,4 +318,90 @@ oom_adjust_restore(void) return; } #endif /* LINUX_OOM_ADJUST */ -#endif /* WITH_SELINUX || LINUX_OOM_ADJUST */ + +#ifdef SYSTEMD_NOTIFY + +static void ssh_systemd_notify(const char *, ...) + __attribute__((__format__ (printf, 1, 2))) __attribute__((__nonnull__ (1))); + +static void +ssh_systemd_notify(const char *fmt, ...) +{ + char *s = NULL; + const char *path; + struct stat sb; + struct sockaddr_un addr; + int fd = -1; + va_list ap; + + if ((path = getenv("NOTIFY_SOCKET")) == NULL || strlen(path) == 0) + return; + + va_start(ap, fmt); + xvasprintf(&s, fmt, ap); + va_end(ap); + + /* Only AF_UNIX is supported, with path or abstract sockets */ + if (path[0] != '/' && path[0] != '@') { + error_f("socket \"%s\" is not compatible with AF_UNIX", path); + goto out; + } + + if (path[0] == '/' && stat(path, &sb) != 0) { + error_f("socket \"%s\" stat: %s", path, strerror(errno)); + goto out; + } + + memset(&addr, 0, sizeof(addr)); + addr.sun_family = AF_UNIX; + if (strlcpy(addr.sun_path, path, + sizeof(addr.sun_path)) >= sizeof(addr.sun_path)) { + error_f("socket path \"%s\" too long", path); + goto out; + } + /* Support for abstract socket */ + if (addr.sun_path[0] == '@') + addr.sun_path[0] = 0; + if ((fd = socket(PF_UNIX, SOCK_DGRAM, 0)) == -1) { + error_f("socket \"%s\": %s", path, strerror(errno)); + goto out; + } + if (connect(fd, &addr, sizeof(addr)) != 0) { + error_f("socket \"%s\" connect: %s", path, strerror(errno)); + goto out; + } + if (write(fd, s, strlen(s)) != (ssize_t)strlen(s)) { + error_f("socket \"%s\" write: %s", path, strerror(errno)); + goto out; + } + debug_f("socket \"%s\" notified %s", path, s); + out: + if (fd != -1) + close(fd); + free(s); +} + +void +ssh_systemd_notify_ready(void) +{ + ssh_systemd_notify("READY=1"); +} + +void +ssh_systemd_notify_reload(void) +{ + struct timespec now; + + monotime_ts(&now); + if (now.tv_sec < 0 || now.tv_nsec < 0) { + error_f("monotime returned negative value"); + ssh_systemd_notify("RELOADING=1"); + } else { + ssh_systemd_notify("RELOADING=1\nMONOTONIC_USEC=%llu", + ((uint64_t)now.tv_sec * 1000000ULL) + + ((uint64_t)now.tv_nsec / 1000ULL)); + } +} +#endif /* SYSTEMD_NOTIFY */ + +#endif /* WITH_SELINUX || LINUX_OOM_ADJUST || SYSTEMD_NOTIFY */ |