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-rw-r--r--misc-utils/uuidd.c669
1 files changed, 669 insertions, 0 deletions
diff --git a/misc-utils/uuidd.c b/misc-utils/uuidd.c
new file mode 100644
index 0000000..3dde49e
--- /dev/null
+++ b/misc-utils/uuidd.c
@@ -0,0 +1,669 @@
+/*
+ * uuidd.c --- UUID-generation daemon
+ *
+ * Copyright (C) 2007 Theodore Ts'o
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+#include <stdio.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#include <unistd.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <err.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <string.h>
+#ifdef HAVE_GETOPT_H
+#include <getopt.h>
+#else
+extern int getopt(int argc, char * const argv[], const char *optstring);
+extern char *optarg;
+extern int optind;
+#endif
+
+#include "uuid.h"
+#include "uuidd.h"
+#include "all-io.h"
+#include "c.h"
+#include "closestream.h"
+
+#ifdef USE_SOCKET_ACTIVATION
+#include "sd-daemon.h"
+#endif
+
+#include "nls.h"
+
+#ifdef __GNUC__
+#define CODE_ATTR(x) __attribute__(x)
+#else
+#define CODE_ATTR(x)
+#endif
+
+/* length of textual representation of UUID, including trailing \0 */
+#define UUID_STR_LEN 37
+
+/* length of binary representation of UUID */
+#define UUID_LEN (sizeof(uuid_t))
+
+/* server loop control structure */
+struct uuidd_cxt_t {
+ int timeout;
+ unsigned int debug: 1,
+ quiet: 1,
+ no_fork: 1,
+ no_sock: 1;
+};
+
+static void __attribute__ ((__noreturn__)) usage(FILE * out)
+{
+ fputs(_("\nUsage:\n"), out);
+ fprintf(out,
+ _(" %s [options]\n"), program_invocation_short_name);
+
+ fputs(_("\nOptions:\n"), out);
+ fputs(_(" -p, --pid <path> path to pid file\n"
+ " -s, --socket <path> path to socket\n"
+ " -T, --timeout <sec> specify inactivity timeout\n"
+ " -k, --kill kill running daemon\n"
+ " -r, --random test random-based generation\n"
+ " -t, --time test time-based generation\n"
+ " -n, --uuids <num> request number of uuids\n"
+ " -P, --no-pid do not create pid file\n"
+ " -F, --no-fork do not daemonize using double-fork\n"
+ " -S, --socket-activation do not create listening socket\n"
+ " -d, --debug run in debugging mode\n"
+ " -q, --quiet turn on quiet mode\n"
+ " -V, --version output version information and exit\n"
+ " -h, --help display this help and exit\n\n"), out);
+
+ exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
+}
+
+static void create_daemon(void)
+{
+ uid_t euid;
+
+ if (daemon(0, 0))
+ err(EXIT_FAILURE, "daemon");
+
+ euid = geteuid();
+ if (setreuid(euid, euid) < 0)
+ err(EXIT_FAILURE, "setreuid");
+}
+
+static const char *cleanup_pidfile, *cleanup_socket;
+
+static void terminate_intr(int signo CODE_ATTR((unused)))
+{
+ if (cleanup_pidfile)
+ unlink(cleanup_pidfile);
+ if (cleanup_socket)
+ unlink(cleanup_socket);
+ exit(EXIT_SUCCESS);
+}
+
+static int call_daemon(const char *socket_path, int op, char *buf,
+ size_t buflen, int *num, const char **err_context)
+{
+ char op_buf[8];
+ int op_len;
+ int s;
+ ssize_t ret;
+ int32_t reply_len = 0;
+ struct sockaddr_un srv_addr;
+
+ if (((op == UUIDD_OP_BULK_TIME_UUID) ||
+ (op == UUIDD_OP_BULK_RANDOM_UUID)) && !num) {
+ if (err_context)
+ *err_context = _("bad arguments");
+ errno = EINVAL;
+ return -1;
+ }
+
+ if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
+ if (err_context)
+ *err_context = _("socket");
+ return -1;
+ }
+
+ srv_addr.sun_family = AF_UNIX;
+ strncpy(srv_addr.sun_path, socket_path, sizeof(srv_addr.sun_path));
+ srv_addr.sun_path[sizeof(srv_addr.sun_path) - 1] = '\0';
+
+ if (connect(s, (const struct sockaddr *) &srv_addr,
+ sizeof(struct sockaddr_un)) < 0) {
+ if (err_context)
+ *err_context = _("connect");
+ close(s);
+ return -1;
+ }
+
+ if (op == UUIDD_OP_BULK_RANDOM_UUID) {
+ if ((*num) * UUID_LEN > buflen - 4)
+ *num = (buflen - 4) / UUID_LEN;
+ }
+ op_buf[0] = op;
+ op_len = 1;
+ if ((op == UUIDD_OP_BULK_TIME_UUID) ||
+ (op == UUIDD_OP_BULK_RANDOM_UUID)) {
+ memcpy(op_buf + 1, num, sizeof(int));
+ op_len += sizeof(int);
+ }
+
+ ret = write_all(s, op_buf, op_len);
+ if (ret < 0) {
+ if (err_context)
+ *err_context = _("write");
+ close(s);
+ return -1;
+ }
+
+ ret = read_all(s, (char *) &reply_len, sizeof(reply_len));
+ if (ret < 0) {
+ if (err_context)
+ *err_context = _("read count");
+ close(s);
+ return -1;
+ }
+ if (reply_len < 0 || (size_t) reply_len > buflen) {
+ if (err_context)
+ *err_context = _("bad response length");
+ close(s);
+ return -1;
+ }
+ ret = read_all(s, (char *) buf, reply_len);
+
+ if ((ret > 0) && (op == UUIDD_OP_BULK_TIME_UUID)) {
+ if (reply_len >= (int) (UUID_LEN + sizeof(int)))
+ memcpy(buf + UUID_LEN, num, sizeof(int));
+ else
+ *num = -1;
+ }
+ if ((ret > 0) && (op == UUIDD_OP_BULK_RANDOM_UUID)) {
+ if (reply_len >= (int) sizeof(int))
+ memcpy(buf, num, sizeof(int));
+ else
+ *num = -1;
+ }
+
+ close(s);
+
+ return ret;
+}
+
+/*
+ * Exclusively create and open a pid file with path @pidfile_path
+ *
+ * Set cleanup_pidfile global variable for the cleanup
+ * handler. @pidfile_path must not be NULL.
+ *
+ * Return file descriptor of the created pid_file.
+ */
+static int create_pidfile(const char *pidfile_path, int quiet)
+{
+ int fd_pidfile;
+ struct flock fl;
+
+ fd_pidfile = open(pidfile_path, O_CREAT | O_RDWR, 0664);
+ if (fd_pidfile < 0) {
+ if (!quiet)
+ fprintf(stderr, _("Failed to open/create %s: %m\n"),
+ pidfile_path);
+ exit(EXIT_FAILURE);
+ }
+ cleanup_pidfile = pidfile_path;
+
+ fl.l_type = F_WRLCK;
+ fl.l_whence = SEEK_SET;
+ fl.l_start = 0;
+ fl.l_len = 0;
+ fl.l_pid = 0;
+ while (fcntl(fd_pidfile, F_SETLKW, &fl) < 0) {
+ if ((errno == EAGAIN) || (errno == EINTR))
+ continue;
+ if (!quiet)
+ fprintf(stderr, _("Failed to lock %s: %m\n"), pidfile_path);
+ exit(EXIT_FAILURE);
+ }
+
+ return fd_pidfile;
+}
+
+/*
+ * Create AF_UNIX, SOCK_STREAM socket and bind to @socket_path
+ *
+ * If @will_fork is true, then make sure the descriptor
+ * of the socket is >2, so that it wont be later closed
+ * during create_daemon().
+ *
+ * Return file descriptor corresponding to created socket.
+ */
+static int create_socket(const char *socket_path, int will_fork, int quiet)
+{
+ struct sockaddr_un my_addr;
+ mode_t save_umask;
+ int s;
+
+ if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
+ if (!quiet)
+ fprintf(stderr, _("Couldn't create unix stream socket: %m"));
+ exit(EXIT_FAILURE);
+ }
+
+ /*
+ * Make sure the socket isn't using fd numbers 0-2 to avoid it
+ * getting closed by create_daemon()
+ */
+ while (will_fork && s <= 2) {
+ s = dup(s);
+ if (s < 0)
+ err(EXIT_FAILURE, "dup");
+ }
+
+ /*
+ * Create the address we will be binding to.
+ */
+ my_addr.sun_family = AF_UNIX;
+ strncpy(my_addr.sun_path, socket_path, sizeof(my_addr.sun_path));
+ my_addr.sun_path[sizeof(my_addr.sun_path) - 1] = '\0';
+ unlink(socket_path);
+ save_umask = umask(0);
+ if (bind(s, (const struct sockaddr *) &my_addr,
+ sizeof(struct sockaddr_un)) < 0) {
+ if (!quiet)
+ fprintf(stderr,
+ _("Couldn't bind unix socket %s: %m\n"), socket_path);
+ exit(EXIT_FAILURE);
+ }
+ umask(save_umask);
+ cleanup_socket = socket_path;
+
+ return s;
+}
+
+static void server_loop(const char *socket_path, const char *pidfile_path,
+ const struct uuidd_cxt_t *uuidd_cxt)
+{
+ struct sockaddr_un from_addr;
+ socklen_t fromlen;
+ int32_t reply_len = 0;
+ uuid_t uu;
+ char reply_buf[1024], *cp;
+ char op, str[UUID_STR_LEN];
+ int i, ns, len, num;
+ int s = 0;
+ int fd_pidfile = -1;
+ int ret;
+
+#ifdef USE_SOCKET_ACTIVATION
+ if (!uuidd_cxt->no_sock) /* no_sock implies no_fork and no_pid */
+#endif
+ {
+
+ signal(SIGALRM, terminate_intr);
+ alarm(30);
+ if (pidfile_path)
+ fd_pidfile = create_pidfile(pidfile_path, uuidd_cxt->quiet);
+
+ ret = call_daemon(socket_path, UUIDD_OP_GETPID, reply_buf,
+ sizeof(reply_buf), 0, NULL);
+ if (ret > 0) {
+ if (!uuidd_cxt->quiet)
+ fprintf(stderr,
+ _("uuidd daemon already running at pid %s\n"),
+ reply_buf);
+ exit(EXIT_FAILURE);
+ }
+ alarm(0);
+
+ s = create_socket(socket_path,
+ (!uuidd_cxt->debug || !uuidd_cxt->no_fork),
+ uuidd_cxt->quiet);
+ if (listen(s, SOMAXCONN) < 0) {
+ if (!uuidd_cxt->quiet)
+ fprintf(stderr, _("Couldn't listen on unix "
+ "socket %s: %m\n"), socket_path);
+ exit(EXIT_FAILURE);
+ }
+
+ if (!uuidd_cxt->debug && !uuidd_cxt->no_fork)
+ create_daemon();
+
+ if (pidfile_path) {
+ sprintf(reply_buf, "%8d\n", getpid());
+ ignore_result( ftruncate(fd_pidfile, 0) );
+ write_all(fd_pidfile, reply_buf, strlen(reply_buf));
+ if (fd_pidfile > 1)
+ close(fd_pidfile); /* Unlock the pid file */
+ }
+
+ }
+
+ signal(SIGHUP, terminate_intr);
+ signal(SIGINT, terminate_intr);
+ signal(SIGTERM, terminate_intr);
+ signal(SIGALRM, terminate_intr);
+ signal(SIGPIPE, SIG_IGN);
+
+#ifdef USE_SOCKET_ACTIVATION
+ if (uuidd_cxt->no_sock) {
+ if (sd_listen_fds(0) != 1) {
+ fprintf(stderr, _("No or too many file descriptors received.\n"));
+ exit(EXIT_FAILURE);
+ }
+
+ s = SD_LISTEN_FDS_START + 0;
+ }
+#endif
+
+ while (1) {
+ fromlen = sizeof(from_addr);
+ if (uuidd_cxt->timeout > 0)
+ alarm(uuidd_cxt->timeout);
+ ns = accept(s, (struct sockaddr *) &from_addr, &fromlen);
+ alarm(0);
+ if (ns < 0) {
+ if ((errno == EAGAIN) || (errno == EINTR))
+ continue;
+ else
+ err(EXIT_FAILURE, "accept");
+ }
+ len = read(ns, &op, 1);
+ if (len != 1) {
+ if (len < 0)
+ perror("read");
+ else
+ fprintf(stderr, _("Error reading from client, "
+ "len = %d\n"), len);
+ goto shutdown_socket;
+ }
+ if ((op == UUIDD_OP_BULK_TIME_UUID) ||
+ (op == UUIDD_OP_BULK_RANDOM_UUID)) {
+ if (read_all(ns, (char *) &num, sizeof(num)) != 4)
+ goto shutdown_socket;
+ if (uuidd_cxt->debug)
+ fprintf(stderr, _("operation %d, incoming num = %d\n"),
+ op, num);
+ } else if (uuidd_cxt->debug)
+ fprintf(stderr, _("operation %d\n"), op);
+
+ switch (op) {
+ case UUIDD_OP_GETPID:
+ sprintf(reply_buf, "%d", getpid());
+ reply_len = strlen(reply_buf) + 1;
+ break;
+ case UUIDD_OP_GET_MAXOP:
+ sprintf(reply_buf, "%d", UUIDD_MAX_OP);
+ reply_len = strlen(reply_buf) + 1;
+ break;
+ case UUIDD_OP_TIME_UUID:
+ num = 1;
+ __uuid_generate_time(uu, &num);
+ if (uuidd_cxt->debug) {
+ uuid_unparse(uu, str);
+ fprintf(stderr, _("Generated time UUID: %s\n"), str);
+ }
+ memcpy(reply_buf, uu, sizeof(uu));
+ reply_len = sizeof(uu);
+ break;
+ case UUIDD_OP_RANDOM_UUID:
+ num = 1;
+ __uuid_generate_random(uu, &num);
+ if (uuidd_cxt->debug) {
+ uuid_unparse(uu, str);
+ fprintf(stderr, _("Generated random UUID: %s\n"), str);
+ }
+ memcpy(reply_buf, uu, sizeof(uu));
+ reply_len = sizeof(uu);
+ break;
+ case UUIDD_OP_BULK_TIME_UUID:
+ __uuid_generate_time(uu, &num);
+ if (uuidd_cxt->debug) {
+ uuid_unparse(uu, str);
+ fprintf(stderr, P_("Generated time UUID %s "
+ "and %d following\n",
+ "Generated time UUID %s "
+ "and %d following\n", num - 1),
+ str, num - 1);
+ }
+ memcpy(reply_buf, uu, sizeof(uu));
+ reply_len = sizeof(uu);
+ memcpy(reply_buf + reply_len, &num, sizeof(num));
+ reply_len += sizeof(num);
+ break;
+ case UUIDD_OP_BULK_RANDOM_UUID:
+ if (num < 0)
+ num = 1;
+ if (num > 1000)
+ num = 1000;
+ if (num * UUID_LEN > (int) (sizeof(reply_buf) - sizeof(num)))
+ num = (sizeof(reply_buf) - sizeof(num)) / UUID_LEN;
+ __uuid_generate_random((unsigned char *) reply_buf +
+ sizeof(num), &num);
+ if (uuidd_cxt->debug) {
+ fprintf(stderr, P_("Generated %d UUID:\n",
+ "Generated %d UUIDs:\n", num), num);
+ for (i = 0, cp = reply_buf + sizeof(num);
+ i < num;
+ i++, cp += UUID_LEN) {
+ uuid_unparse((unsigned char *)cp, str);
+ fprintf(stderr, "\t%s\n", str);
+ }
+ }
+ reply_len = (num * UUID_LEN) + sizeof(num);
+ memcpy(reply_buf, &num, sizeof(num));
+ break;
+ default:
+ if (uuidd_cxt->debug)
+ fprintf(stderr, _("Invalid operation %d\n"), op);
+ goto shutdown_socket;
+ }
+ write_all(ns, (char *) &reply_len, sizeof(reply_len));
+ write_all(ns, reply_buf, reply_len);
+ shutdown_socket:
+ close(ns);
+ }
+}
+
+static void __attribute__ ((__noreturn__)) unexpected_size(int size)
+{
+ errx(EXIT_FAILURE, _("Unexpected reply length from server %d"), size);
+}
+
+int main(int argc, char **argv)
+{
+ const char *socket_path = UUIDD_SOCKET_PATH;
+ const char *pidfile_path = NULL;
+ const char *pidfile_path_param = NULL;
+ const char *err_context;
+ char buf[1024], *cp;
+ char str[UUID_STR_LEN], *tmp;
+ uuid_t uu;
+ int i, c, ret;
+ int do_type = 0, do_kill = 0, num = 0;
+ int no_pid = 0;
+ int s_flag = 0;
+
+ struct uuidd_cxt_t uuidd_cxt = { .timeout = 0 };
+
+ static const struct option longopts[] = {
+ {"pid", required_argument, NULL, 'p'},
+ {"socket", required_argument, NULL, 's'},
+ {"timeout", required_argument, NULL, 'T'},
+ {"kill", no_argument, NULL, 'k'},
+ {"random", no_argument, NULL, 'r'},
+ {"time", no_argument, NULL, 't'},
+ {"uuids", required_argument, NULL, 'n'},
+ {"no-pid", no_argument, NULL, 'P'},
+ {"no-fork", no_argument, NULL, 'F'},
+ {"socket-activation", no_argument, NULL, 'S'},
+ {"debug", no_argument, NULL, 'd'},
+ {"quiet", no_argument, NULL, 'q'},
+ {"version", no_argument, NULL, 'V'},
+ {"help", no_argument, NULL, 'h'},
+ {NULL, 0, NULL, 0}
+ };
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ atexit(close_stdout);
+
+ while ((c =
+ getopt_long(argc, argv, "p:s:T:krtn:PFSdqVh", longopts,
+ NULL)) != -1) {
+ switch (c) {
+ case 'd':
+ uuidd_cxt.debug = 1;
+ break;
+ case 'k':
+ do_kill++;
+ break;
+ case 'n':
+ num = strtol(optarg, &tmp, 0);
+ if ((num < 1) || *tmp) {
+ fprintf(stderr, _("Bad number: %s\n"), optarg);
+ return EXIT_FAILURE;
+ }
+ break;
+ case 'p':
+ pidfile_path_param = optarg;
+ break;
+ case 'P':
+ no_pid = 1;
+ break;
+ case 'F':
+ uuidd_cxt.no_fork = 1;
+ break;
+ case 'S':
+#ifdef USE_SOCKET_ACTIVATION
+ uuidd_cxt.no_sock = 1;
+ uuidd_cxt.no_fork = 1;
+ no_pid = 1;
+#else
+ fprintf(stderr,
+ _("uuidd has been built without support for socket activation.\n"));
+ return EXIT_FAILURE;
+#endif
+ break;
+ case 'q':
+ uuidd_cxt.quiet = 1;
+ break;
+ case 'r':
+ do_type = UUIDD_OP_RANDOM_UUID;
+ break;
+ case 's':
+ socket_path = optarg;
+ s_flag = 1;
+ break;
+ case 't':
+ do_type = UUIDD_OP_TIME_UUID;
+ break;
+ case 'T':
+ uuidd_cxt.timeout = strtol(optarg, &tmp, 0);
+ if (uuidd_cxt.timeout < 0 || *tmp) {
+ fprintf(stderr, _("Bad number: %s\n"), optarg);
+ return EXIT_FAILURE;
+ }
+ break;
+ case 'V':
+ printf(_("%s from %s\n"),
+ program_invocation_short_name,
+ PACKAGE_STRING);
+ return EXIT_SUCCESS;
+ case 'h':
+ usage(stdout);
+ default:
+ usage(stderr);
+ }
+ }
+
+ if (no_pid && pidfile_path_param && !uuidd_cxt.quiet)
+ fprintf(stderr, _("Both --pid and --no-pid specified. "
+ "Ignoring --no-pid.\n"));
+
+ if (!no_pid && !pidfile_path_param)
+ pidfile_path = UUIDD_PIDFILE_PATH;
+ else if (pidfile_path_param)
+ pidfile_path = pidfile_path_param;
+
+ /* custom socket path and socket-activation make no sense */
+ if (s_flag && uuidd_cxt.no_sock && !uuidd_cxt.quiet)
+ fprintf(stderr, _("Both --socket-activation and --socket specified. "
+ "Ignoring --socket\n"));
+
+ if (num && do_type) {
+ ret = call_daemon(socket_path, do_type + 2, buf,
+ sizeof(buf), &num, &err_context);
+ if (ret < 0) {
+ printf(_("Error calling uuidd daemon (%s): %m\n"), err_context);
+ return EXIT_FAILURE;
+ }
+ if (do_type == UUIDD_OP_TIME_UUID) {
+ if (ret != sizeof(uu) + sizeof(num))
+ unexpected_size(ret);
+
+ uuid_unparse((unsigned char *) buf, str);
+
+ printf(P_("%s and %d subsequent UUID\n",
+ "%s and %d subsequent UUIDs\n", num - 1),
+ str, num - 1);
+ } else {
+ printf(_("List of UUIDs:\n"));
+ cp = buf + 4;
+ if (ret != (int) (sizeof(num) + num * sizeof(uu)))
+ unexpected_size(ret);
+ for (i = 0; i < num; i++, cp += UUID_LEN) {
+ uuid_unparse((unsigned char *) cp, str);
+ printf("\t%s\n", str);
+ }
+ }
+ return EXIT_SUCCESS;
+ }
+ if (do_type) {
+ ret = call_daemon(socket_path, do_type, (char *) &uu,
+ sizeof(uu), 0, &err_context);
+ if (ret < 0) {
+ printf(_("Error calling uuidd daemon (%s): %m\n"), err_context);
+ return EXIT_FAILURE;
+ }
+ if (ret != sizeof(uu))
+ unexpected_size(ret);
+
+ uuid_unparse(uu, str);
+
+ printf("%s\n", str);
+ return EXIT_SUCCESS;
+ }
+
+ if (do_kill) {
+ ret = call_daemon(socket_path, UUIDD_OP_GETPID, buf, sizeof(buf), 0, NULL);
+ if ((ret > 0) && ((do_kill = atoi((char *) buf)) > 0)) {
+ ret = kill(do_kill, SIGTERM);
+ if (ret < 0) {
+ if (!uuidd_cxt.quiet)
+ fprintf(stderr,
+ _("Couldn't kill uuidd running "
+ "at pid %d: %m\n"), do_kill);
+ return EXIT_FAILURE;
+ }
+ if (!uuidd_cxt.quiet)
+ printf(_("Killed uuidd running at pid %d\n"),
+ do_kill);
+ }
+ return EXIT_SUCCESS;
+ }
+
+ server_loop(socket_path, pidfile_path, &uuidd_cxt);
+ return EXIT_SUCCESS;
+}
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