diff options
Diffstat (limited to 'src/satd.c')
| -rw-r--r-- | src/satd.c | 125 |
1 files changed, 12 insertions, 113 deletions
@@ -19,31 +19,8 @@ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ -#include "daemon.h" +#include "common.h" #include "daemonise.h" -#include <unistd.h> -#include <errno.h> -#include <pwd.h> -#include <fcntl.h> -#include <sys/stat.h> -#include <sys/un.h> -#include <sys/file.h> -#include <sys/timerfd.h> - - - -/** - * The size of the backlog on the socket. - */ -#ifndef SATD_BACKLOG -# define SATD_BACKLOG 5 -#endif -#if SATD_BACKLOG > SOMAXCONN -# undef SATD_BACKLOG -# defined SATD_BACKLOG SOMAXCONN -#endif - -#define close(fd) (fd < 0 ? 0 : close(fd)) @@ -53,40 +30,6 @@ USAGE("[-f]") /** - * Create the socket. - * - * @param address Output parameter for the socket address. - * @return The file descriptor for the socket, -1 on error. - */ -static int -create_socket(struct sockaddr_un *address) -{ - const void *_cvoid; - const char *dir; - int fd = -1, saved_errno; - - /* Get socket address. */ - dir = getenv("XDG_RUNTIME_DIR"), dir = (dir ? dir : "/run"); - if (strlen(dir) + sizeof("/" PACKAGE "/socket") > sizeof(address->sun_path)) - t ((errno = ENAMETOOLONG)); - stpcpy(stpcpy(address->sun_path, dir), "/" PACKAGE "/socket"); - address->sun_family = AF_UNIX; - - /* Create socket. */ - unlink(address->sun_path); - t ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) == -1); - t (fchmod(fd, S_IRWXU)); - t (bind(fd, (const struct sockaddr *)(_cvoid = address), (socklen_t)sizeof(*address))); - /* EADDRINUSE just means that the file already exists, not that it is actually used. */ - - return fd; -fail: - saved_errno = errno, close(fd), errno = saved_errno; - return -1; -} - - -/** * Create and lock the lock file, and its directory. * * @return A file descriptor to the lock file, -1 on error. @@ -97,6 +40,7 @@ create_lock(void) const char *dir; char *path; char *p; + pid_t pid = getpid(); int fd = -1, saved_errno = 0; /* Create directory. */ @@ -117,9 +61,13 @@ create_lock(void) goto fail; } + /* Store PID in the file. */ + /* Yes it is coming similar to a PID file, but this works if the started with -f. */ + t (pwrite(fd, &pid, sizeof(pid), (off_t)0) < (size_t)sizeof(pid)); + goto done; fail: - saved_errno = errno, close(fd); + saved_errno = errno, close(fd), fd = -1; done: free(path), errno = saved_errno; return fd; @@ -127,40 +75,6 @@ done: /** - * Construct the pathname for the hook script. - * - * @param env The environment variable to use for the beginning - * of the pathname, `NULL` for the home directory. - * @param suffix The rest of the pathname. - * @return The pathname. - * - * @throws 0 The environment variable is not set, or, if `env` is - * `NULL` the user is root or homeless. - */ -static char * -hookpath(const char *env, const char *suffix) -{ - struct passwd *pwd; - const char *prefix = NULL; - char *path; - - if (env) { - prefix = getenv(env); - } else if (getuid()) { - pwd = getpwuid(getuid()); - prefix = pwd ? pwd->pw_dir : NULL; - } - if (!prefix || !*prefix) - return errno = 0, NULL; - - t (!(path = malloc((strlen(prefix) + strlen(suffix) + 1) * sizeof(char)))); - stpcpy(stpcpy(path, prefix), suffix); -fail: - return path; -} - - -/** * The sat daemon initialisation. * * @param argc Any value in [0, 2] is accepted. @@ -173,11 +87,7 @@ fail: int main(int argc, char *argv[]) { -#define HOOKPATH(PRE, SUF) \ - t (path = path ? path : hookpath(PRE, SUF), !path && errno) - - struct sockaddr_un address; - int sock = -1, state = -1, boot = -1, real = -1, lock = -1, foreground = 0; + int state = -1, boot = -1, real = -1, lock = -1, foreground = 0; char *path = NULL; struct itimerspec spec; @@ -188,18 +98,11 @@ main(int argc, char *argv[]) usage(); /* Get hook-script pathname. */ - if (!getenv("SAT_HOOK_PATH")) { - HOOKPATH("XDG_CONFIG_HOME", "/sat/hook"); - HOOKPATH("HOME", "/.config/sat/hook"); - HOOKPATH(NULL, "/.config/sat/hook"); - t (setenv("SAT_HOOK_PATH", path ? path : "/etc/sat/hook", 1)); - free(path), path = NULL; - } + t (set_hookpath()); /* Open/create lock file and state file, and create socket. */ GET_FD(lock, LOCK_FILENO, create_lock()); GET_FD(state, STATE_FILENO, open_state(O_RDWR | O_CREAT, &path)); - GET_FD(sock, SOCK_FILENO, create_socket(&address)); /* Create timers. */ GET_FD(boot, BOOT_FILENO, timerfd_create(CLOCK_BOOTTIME, 0)); @@ -210,21 +113,17 @@ main(int argc, char *argv[]) t (timerfd_settime(boot, TFD_TIMER_ABSTIME, &spec, NULL)); t (timerfd_settime(real, TFD_TIMER_ABSTIME, &spec, NULL)); - /* Listen for incoming conections. */ - t (listen(sock, SATD_BACKLOG)); - /* Daemonise. */ - t (foreground ? 0 : daemonise("satd", DAEMONISE_KEEP_FDS | DAEMONISE_NEW_PID, 3, 4, 5, 6, 7, -1)); + t (foreground ? 0 : daemonise("satd", DAEMONISE_KEEP_FDS | DAEMONISE_NEW_PID, 3, 4, 5, 6, -1)); /* Change to a process image without all this initialisation text. */ - execl(LIBEXECDIR "/" PACKAGE "/satd-diminished", argv0, address.sun_path, path, NULL); + execl(LIBEXECDIR "/" PACKAGE "/satd-diminished", argv0, path, NULL); fail: if (errno) perror(argv0); free(path); - if (sock >= 0) unlink(address.sun_path); - close(sock), close(state), close(boot), close(real), close(lock); + close(state), close(boot), close(real), close(lock); undaemonise(); return 1; } |