- va_start(ap, text);
- vprintf(text, ap);
- va_end(ap);
-
- if (on_tty())
- fputs(ANSI_HIGHLIGHT_OFF, stdout);
-
- fflush(stdout);
-
- errno = 0;
- if (!fgets(line, sizeof(line), stdin))
- return errno ? -errno : -EIO;
-
- if (!endswith(line, "\n"))
- putchar('\n');
- else {
- char *s;
-
- if (isempty(line))
- continue;
-
- truncate_nl(line);
- s = strdup(line);
- if (!s)
- return -ENOMEM;
-
- *ret = s;
- return 0;
- }
- }
-}
-
-int reset_terminal_fd(int fd, bool switch_to_text) {
- struct termios termios;
- int r = 0;
-
- /* Set terminal to some sane defaults */
-
- assert(fd >= 0);
-
- /* We leave locked terminal attributes untouched, so that
- * Plymouth may set whatever it wants to set, and we don't
- * interfere with that. */
-
- /* Disable exclusive mode, just in case */
- ioctl(fd, TIOCNXCL);
-
- /* Switch to text mode */
- if (switch_to_text)
- ioctl(fd, KDSETMODE, KD_TEXT);
-
- /* Enable console unicode mode */
- ioctl(fd, KDSKBMODE, K_UNICODE);
-
- if (tcgetattr(fd, &termios) < 0) {
- r = -errno;
- goto finish;
- }
-
- /* We only reset the stuff that matters to the software. How
- * hardware is set up we don't touch assuming that somebody
- * else will do that for us */
-
- termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
- termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
- termios.c_oflag |= ONLCR;
- termios.c_cflag |= CREAD;
- termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
-
- termios.c_cc[VINTR] = 03; /* ^C */
- termios.c_cc[VQUIT] = 034; /* ^\ */
- termios.c_cc[VERASE] = 0177;
- termios.c_cc[VKILL] = 025; /* ^X */
- termios.c_cc[VEOF] = 04; /* ^D */
- termios.c_cc[VSTART] = 021; /* ^Q */
- termios.c_cc[VSTOP] = 023; /* ^S */
- termios.c_cc[VSUSP] = 032; /* ^Z */
- termios.c_cc[VLNEXT] = 026; /* ^V */
- termios.c_cc[VWERASE] = 027; /* ^W */
- termios.c_cc[VREPRINT] = 022; /* ^R */
- termios.c_cc[VEOL] = 0;
- termios.c_cc[VEOL2] = 0;
-
- termios.c_cc[VTIME] = 0;
- termios.c_cc[VMIN] = 1;
-
- if (tcsetattr(fd, TCSANOW, &termios) < 0)
- r = -errno;
-
-finish:
- /* Just in case, flush all crap out */
- tcflush(fd, TCIOFLUSH);
-
- return r;
-}
-
-int reset_terminal(const char *name) {
- _cleanup_close_ int fd = -1;
-
- fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- return reset_terminal_fd(fd, true);
-}
-
-int open_terminal(const char *name, int mode) {
- int fd, r;
- unsigned c = 0;
-
- /*
- * If a TTY is in the process of being closed opening it might
- * cause EIO. This is horribly awful, but unlikely to be
- * changed in the kernel. Hence we work around this problem by
- * retrying a couple of times.
- *
- * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245
- */
-
- assert(!(mode & O_CREAT));
-
- for (;;) {
- fd = open(name, mode, 0);
- if (fd >= 0)
- break;
-
- if (errno != EIO)
- return -errno;
-
- /* Max 1s in total */
- if (c >= 20)
- return -errno;
-
- usleep(50 * USEC_PER_MSEC);
- c++;
- }
-
- r = isatty(fd);
- if (r < 0) {
- safe_close(fd);
- return -errno;
- }
-
- if (!r) {
- safe_close(fd);
- return -ENOTTY;
- }
-
- return fd;
-}
-
-int flush_fd(int fd) {
- struct pollfd pollfd = {
- .fd = fd,
- .events = POLLIN,
- };
-
- for (;;) {
- char buf[LINE_MAX];
- ssize_t l;
- int r;
-
- r = poll(&pollfd, 1, 0);
- if (r < 0) {
- if (errno == EINTR)
- continue;
-
- return -errno;
-
- } else if (r == 0)
- return 0;
-
- l = read(fd, buf, sizeof(buf));
- if (l < 0) {
-
- if (errno == EINTR)
- continue;
-
- if (errno == EAGAIN)
- return 0;
-
- return -errno;
- } else if (l == 0)
- return 0;
- }
-}
-
-int acquire_terminal(
- const char *name,
- bool fail,
- bool force,
- bool ignore_tiocstty_eperm,
- usec_t timeout) {
-
- int fd = -1, notify = -1, r = 0, wd = -1;
- usec_t ts = 0;
-
- assert(name);
-
- /* We use inotify to be notified when the tty is closed. We
- * create the watch before checking if we can actually acquire
- * it, so that we don't lose any event.
- *
- * Note: strictly speaking this actually watches for the
- * device being closed, it does *not* really watch whether a
- * tty loses its controlling process. However, unless some
- * rogue process uses TIOCNOTTY on /dev/tty *after* closing
- * its tty otherwise this will not become a problem. As long
- * as the administrator makes sure not configure any service
- * on the same tty as an untrusted user this should not be a
- * problem. (Which he probably should not do anyway.) */
-
- if (timeout != USEC_INFINITY)
- ts = now(CLOCK_MONOTONIC);
-
- if (!fail && !force) {
- notify = inotify_init1(IN_CLOEXEC | (timeout != USEC_INFINITY ? IN_NONBLOCK : 0));
- if (notify < 0) {
- r = -errno;
- goto fail;
- }
-
- wd = inotify_add_watch(notify, name, IN_CLOSE);
- if (wd < 0) {
- r = -errno;
- goto fail;
- }
- }
-
- for (;;) {
- struct sigaction sa_old, sa_new = {
- .sa_handler = SIG_IGN,
- .sa_flags = SA_RESTART,
- };
-
- if (notify >= 0) {
- r = flush_fd(notify);
- if (r < 0)
- goto fail;
- }
-
- /* We pass here O_NOCTTY only so that we can check the return
- * value TIOCSCTTY and have a reliable way to figure out if we
- * successfully became the controlling process of the tty */
- fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
- * if we already own the tty. */
- assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
-
- /* First, try to get the tty */
- if (ioctl(fd, TIOCSCTTY, force) < 0)
- r = -errno;
-
- assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
-
- /* Sometimes it makes sense to ignore TIOCSCTTY
- * returning EPERM, i.e. when very likely we already
- * are have this controlling terminal. */
- if (r < 0 && r == -EPERM && ignore_tiocstty_eperm)
- r = 0;
-
- if (r < 0 && (force || fail || r != -EPERM)) {
- goto fail;
- }
-
- if (r >= 0)
- break;
-
- assert(!fail);
- assert(!force);
- assert(notify >= 0);
-
- for (;;) {
- union inotify_event_buffer buffer;
- struct inotify_event *e;
- ssize_t l;
-
- if (timeout != USEC_INFINITY) {
- usec_t n;
-
- n = now(CLOCK_MONOTONIC);
- if (ts + timeout < n) {
- r = -ETIMEDOUT;
- goto fail;
- }
-
- r = fd_wait_for_event(fd, POLLIN, ts + timeout - n);
- if (r < 0)
- goto fail;
-
- if (r == 0) {
- r = -ETIMEDOUT;
- goto fail;
- }
- }
-
- l = read(notify, &buffer, sizeof(buffer));
- if (l < 0) {
- if (errno == EINTR || errno == EAGAIN)
- continue;
-
- r = -errno;
- goto fail;
- }
-
- FOREACH_INOTIFY_EVENT(e, buffer, l) {
- if (e->wd != wd || !(e->mask & IN_CLOSE)) {
- r = -EIO;
- goto fail;
- }
- }
-
- break;
- }
-
- /* We close the tty fd here since if the old session
- * ended our handle will be dead. It's important that
- * we do this after sleeping, so that we don't enter
- * an endless loop. */
- fd = safe_close(fd);
- }
-
- safe_close(notify);
-
- r = reset_terminal_fd(fd, true);
- if (r < 0)
- log_warning_errno(r, "Failed to reset terminal: %m");
-
- return fd;
-
-fail:
- safe_close(fd);
- safe_close(notify);
-
- return r;
-}
-
-int release_terminal(void) {
- static const struct sigaction sa_new = {
- .sa_handler = SIG_IGN,
- .sa_flags = SA_RESTART,
- };
-
- _cleanup_close_ int fd = -1;
- struct sigaction sa_old;
- int r = 0;
-
- fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC);
- if (fd < 0)
- return -errno;
-
- /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
- * by our own TIOCNOTTY */
- assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
-
- if (ioctl(fd, TIOCNOTTY) < 0)
- r = -errno;
-
- assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
-
- return r;
-}
-
-int sigaction_many(const struct sigaction *sa, ...) {
- va_list ap;
- int r = 0, sig;
-
- va_start(ap, sa);
- while ((sig = va_arg(ap, int)) > 0)
- if (sigaction(sig, sa, NULL) < 0)
- r = -errno;
- va_end(ap);
-
- return r;
-}
-
-int ignore_signals(int sig, ...) {
- struct sigaction sa = {
- .sa_handler = SIG_IGN,
- .sa_flags = SA_RESTART,
- };
- va_list ap;
- int r = 0;
-
- if (sigaction(sig, &sa, NULL) < 0)
- r = -errno;
-
- va_start(ap, sig);
- while ((sig = va_arg(ap, int)) > 0)
- if (sigaction(sig, &sa, NULL) < 0)
- r = -errno;
- va_end(ap);
-
- return r;
-}
-
-int default_signals(int sig, ...) {
- struct sigaction sa = {
- .sa_handler = SIG_DFL,
- .sa_flags = SA_RESTART,
- };
- va_list ap;
- int r = 0;
-
- if (sigaction(sig, &sa, NULL) < 0)
- r = -errno;
-
- va_start(ap, sig);
- while ((sig = va_arg(ap, int)) > 0)
- if (sigaction(sig, &sa, NULL) < 0)
- r = -errno;
- va_end(ap);
-
- return r;
-}
-
-void safe_close_pair(int p[]) {
- assert(p);
-
- if (p[0] == p[1]) {
- /* Special case pairs which use the same fd in both
- * directions... */
- p[0] = p[1] = safe_close(p[0]);
- return;
- }
-
- p[0] = safe_close(p[0]);
- p[1] = safe_close(p[1]);
-}
-
-ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) {
- uint8_t *p = buf;
- ssize_t n = 0;
-
- assert(fd >= 0);
- assert(buf);
-
- while (nbytes > 0) {
- ssize_t k;
-
- k = read(fd, p, nbytes);
- if (k < 0) {
- if (errno == EINTR)
- continue;
-
- if (errno == EAGAIN && do_poll) {
-
- /* We knowingly ignore any return value here,
- * and expect that any error/EOF is reported
- * via read() */
-
- fd_wait_for_event(fd, POLLIN, USEC_INFINITY);
- continue;
- }
-
- return n > 0 ? n : -errno;
- }
-
- if (k == 0)
- return n;
-
- p += k;
- nbytes -= k;
- n += k;
- }
-
- return n;
-}
-
-int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll) {
- ssize_t n;
-
- n = loop_read(fd, buf, nbytes, do_poll);
- if (n < 0)
- return n;
- if ((size_t) n != nbytes)
- return -EIO;
- return 0;
-}
-
-int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
- const uint8_t *p = buf;
-
- assert(fd >= 0);
- assert(buf);
-
- errno = 0;
-
- while (nbytes > 0) {
- ssize_t k;
-
- k = write(fd, p, nbytes);
- if (k < 0) {
- if (errno == EINTR)
- continue;
-
- if (errno == EAGAIN && do_poll) {
- /* We knowingly ignore any return value here,
- * and expect that any error/EOF is reported
- * via write() */
-
- fd_wait_for_event(fd, POLLOUT, USEC_INFINITY);
- continue;
- }
-
- return -errno;
- }
-
- if (k == 0) /* Can't really happen */
- return -EIO;
-
- p += k;
- nbytes -= k;
- }
-
- return 0;
-}
-
-int parse_size(const char *t, off_t base, off_t *size) {
-
- /* Soo, sometimes we want to parse IEC binary suffxies, and
- * sometimes SI decimal suffixes. This function can parse
- * both. Which one is the right way depends on the
- * context. Wikipedia suggests that SI is customary for
- * hardrware metrics and network speeds, while IEC is
- * customary for most data sizes used by software and volatile
- * (RAM) memory. Hence be careful which one you pick!
- *
- * In either case we use just K, M, G as suffix, and not Ki,
- * Mi, Gi or so (as IEC would suggest). That's because that's
- * frickin' ugly. But this means you really need to make sure
- * to document which base you are parsing when you use this
- * call. */
-
- struct table {
- const char *suffix;
- unsigned long long factor;
- };
-
- static const struct table iec[] = {
- { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
- { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
- { "T", 1024ULL*1024ULL*1024ULL*1024ULL },
- { "G", 1024ULL*1024ULL*1024ULL },
- { "M", 1024ULL*1024ULL },
- { "K", 1024ULL },
- { "B", 1 },
- { "", 1 },
- };
-
- static const struct table si[] = {
- { "E", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL*1000ULL },
- { "P", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL },
- { "T", 1000ULL*1000ULL*1000ULL*1000ULL },
- { "G", 1000ULL*1000ULL*1000ULL },
- { "M", 1000ULL*1000ULL },
- { "K", 1000ULL },
- { "B", 1 },
- { "", 1 },
- };
-
- const struct table *table;
- const char *p;
- unsigned long long r = 0;
- unsigned n_entries, start_pos = 0;
-
- assert(t);
- assert(base == 1000 || base == 1024);
- assert(size);
-
- if (base == 1000) {
- table = si;
- n_entries = ELEMENTSOF(si);
- } else {
- table = iec;
- n_entries = ELEMENTSOF(iec);
- }
-
- p = t;
- do {
- long long l;
- unsigned long long l2;
- double frac = 0;
- char *e;
- unsigned i;
-
- errno = 0;
- l = strtoll(p, &e, 10);
-
- if (errno > 0)
- return -errno;
-
- if (l < 0)
- return -ERANGE;
-
- if (e == p)
- return -EINVAL;
-
- if (*e == '.') {
- e++;
- if (*e >= '0' && *e <= '9') {
- char *e2;
-
- /* strotoull itself would accept space/+/- */
- l2 = strtoull(e, &e2, 10);
-
- if (errno == ERANGE)
- return -errno;
-
- /* Ignore failure. E.g. 10.M is valid */
- frac = l2;
- for (; e < e2; e++)
- frac /= 10;
- }
- }
-
- e += strspn(e, WHITESPACE);
-
- for (i = start_pos; i < n_entries; i++)
- if (startswith(e, table[i].suffix)) {
- unsigned long long tmp;
- if ((unsigned long long) l + (frac > 0) > ULLONG_MAX / table[i].factor)
- return -ERANGE;
- tmp = l * table[i].factor + (unsigned long long) (frac * table[i].factor);
- if (tmp > ULLONG_MAX - r)
- return -ERANGE;
-
- r += tmp;
- if ((unsigned long long) (off_t) r != r)
- return -ERANGE;
-
- p = e + strlen(table[i].suffix);
-
- start_pos = i + 1;
- break;
- }
-
- if (i >= n_entries)
- return -EINVAL;
-
- } while (*p);
-
- *size = r;
-
- return 0;
-}
-
-int make_stdio(int fd) {
- int r, s, t;
-
- assert(fd >= 0);
-
- r = dup2(fd, STDIN_FILENO);
- s = dup2(fd, STDOUT_FILENO);
- t = dup2(fd, STDERR_FILENO);
-
- if (fd >= 3)
- safe_close(fd);
-
- if (r < 0 || s < 0 || t < 0)
- return -errno;
-
- /* Explicitly unset O_CLOEXEC, since if fd was < 3, then
- * dup2() was a NOP and the bit hence possibly set. */
- fd_cloexec(STDIN_FILENO, false);
- fd_cloexec(STDOUT_FILENO, false);
- fd_cloexec(STDERR_FILENO, false);
-
- return 0;
-}
-
-int make_null_stdio(void) {
- int null_fd;
-
- null_fd = open("/dev/null", O_RDWR|O_NOCTTY);
- if (null_fd < 0)
- return -errno;
-
- return make_stdio(null_fd);
-}
-
-bool is_device_path(const char *path) {
-
- /* Returns true on paths that refer to a device, either in
- * sysfs or in /dev */
-
- return
- path_startswith(path, "/dev/") ||
- path_startswith(path, "/sys/");
-}
-
-int dir_is_empty(const char *path) {
- _cleanup_closedir_ DIR *d;
-
- d = opendir(path);
- if (!d)
- return -errno;
-
- for (;;) {
- struct dirent *de;
-
- errno = 0;
- de = readdir(d);
- if (!de && errno != 0)
- return -errno;
-
- if (!de)
- return 1;
-
- if (!hidden_file(de->d_name))
- return 0;
- }
-}
-
-char* dirname_malloc(const char *path) {
- char *d, *dir, *dir2;
-
- d = strdup(path);
- if (!d)
- return NULL;
- dir = dirname(d);
- assert(dir);
-
- if (dir != d) {
- dir2 = strdup(dir);
- free(d);
- return dir2;
- }
-
- return dir;
-}
-
-int dev_urandom(void *p, size_t n) {
- static int have_syscall = -1;
-
- _cleanup_close_ fd = -1;
- int r;
-
- /* Gathers some randomness from the kernel. This call will
- * never block, and will always return some data from the
- * kernel, regardless if the random pool is fully initialized
- * or not. It thus makes no guarantee for the quality of the
- * returned entropy, but is good enough for or usual usecases
- * of seeding the hash functions for hashtable */
-
- /* Use the getrandom() syscall unless we know we don't have
- * it, or when the requested size is too large for it. */
- if (have_syscall != 0 || (size_t) (int) n != n) {
- r = getrandom(p, n, GRND_NONBLOCK);
- if (r == (int) n) {
- have_syscall = true;
- return 0;
- }
-
- if (r < 0) {
- if (errno == ENOSYS)
- /* we lack the syscall, continue with
- * reading from /dev/urandom */
- have_syscall = false;
- else if (errno == EAGAIN)
- /* not enough entropy for now. Let's
- * remember to use the syscall the
- * next time, again, but also read
- * from /dev/urandom for now, which
- * doesn't care about the current
- * amount of entropy. */
- have_syscall = true;
- else
- return -errno;
- } else
- /* too short read? */
- return -ENODATA;
- }
-
- fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY);
- if (fd < 0)
- return errno == ENOENT ? -ENOSYS : -errno;
-
- return loop_read_exact(fd, p, n, true);
-}
-
-void initialize_srand(void) {
- static bool srand_called = false;
- unsigned x;
-#ifdef HAVE_SYS_AUXV_H
- void *auxv;
-#endif
-
- if (srand_called)
- return;
-
- x = 0;
-
-#ifdef HAVE_SYS_AUXV_H
- /* The kernel provides us with a bit of entropy in auxv, so
- * let's try to make use of that to seed the pseudo-random
- * generator. It's better than nothing... */
-
- auxv = (void*) getauxval(AT_RANDOM);
- if (auxv)
- x ^= *(unsigned*) auxv;
-#endif
-
- x ^= (unsigned) now(CLOCK_REALTIME);
- x ^= (unsigned) gettid();
-
- srand(x);
- srand_called = true;
-}
-
-void random_bytes(void *p, size_t n) {
- uint8_t *q;
- int r;
-
- r = dev_urandom(p, n);
- if (r >= 0)
- return;
-
- /* If some idiot made /dev/urandom unavailable to us, he'll
- * get a PRNG instead. */
-
- initialize_srand();
-
- for (q = p; q < (uint8_t*) p + n; q ++)
- *q = rand();
-}
-
-void rename_process(const char name[8]) {
- assert(name);
-
- /* This is a like a poor man's setproctitle(). It changes the
- * comm field, argv[0], and also the glibc's internally used
- * name of the process. For the first one a limit of 16 chars
- * applies, to the second one usually one of 10 (i.e. length
- * of "/sbin/init"), to the third one one of 7 (i.e. length of
- * "systemd"). If you pass a longer string it will be
- * truncated */
-
- prctl(PR_SET_NAME, name);
-
- if (program_invocation_name)
- strncpy(program_invocation_name, name, strlen(program_invocation_name));
-
- if (saved_argc > 0) {
- int i;
-
- if (saved_argv[0])
- strncpy(saved_argv[0], name, strlen(saved_argv[0]));
-
- for (i = 1; i < saved_argc; i++) {
- if (!saved_argv[i])
- break;
-
- memzero(saved_argv[i], strlen(saved_argv[i]));
- }
- }
-}
-
-void sigset_add_many(sigset_t *ss, ...) {
- va_list ap;
- int sig;
-
- assert(ss);
-
- va_start(ap, ss);
- while ((sig = va_arg(ap, int)) > 0)
- assert_se(sigaddset(ss, sig) == 0);
- va_end(ap);
-}
-
-int sigprocmask_many(int how, ...) {
- va_list ap;
- sigset_t ss;
- int sig;
-
- assert_se(sigemptyset(&ss) == 0);
-
- va_start(ap, how);
- while ((sig = va_arg(ap, int)) > 0)
- assert_se(sigaddset(&ss, sig) == 0);
- va_end(ap);
-
- if (sigprocmask(how, &ss, NULL) < 0)
- return -errno;
-
- return 0;
-}
-
-char* gethostname_malloc(void) {
- struct utsname u;
-
- assert_se(uname(&u) >= 0);
-
- if (!isempty(u.nodename) && !streq(u.nodename, "(none)"))
- return strdup(u.nodename);
-
- return strdup(u.sysname);
-}
-
-bool hostname_is_set(void) {
- struct utsname u;
-
- assert_se(uname(&u) >= 0);
-
- return !isempty(u.nodename) && !streq(u.nodename, "(none)");
-}
-
-char *lookup_uid(uid_t uid) {
- long bufsize;
- char *name;
- _cleanup_free_ char *buf = NULL;
- struct passwd pwbuf, *pw = NULL;
-
- /* Shortcut things to avoid NSS lookups */
- if (uid == 0)
- return strdup("root");
-
- bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
- if (bufsize <= 0)
- bufsize = 4096;
-
- buf = malloc(bufsize);
- if (!buf)
- return NULL;
-
- if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw)
- return strdup(pw->pw_name);
-
- if (asprintf(&name, UID_FMT, uid) < 0)
- return NULL;
-
- return name;
-}
-
-char* getlogname_malloc(void) {
- uid_t uid;
- struct stat st;
-
- if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
- uid = st.st_uid;
- else
- uid = getuid();
-
- return lookup_uid(uid);
-}
-
-char *getusername_malloc(void) {
- const char *e;
-
- e = getenv("USER");
- if (e)
- return strdup(e);
-
- return lookup_uid(getuid());
-}
-
-int getttyname_malloc(int fd, char **ret) {
- size_t l = 100;
- int r;
-
- assert(fd >= 0);
- assert(ret);
-
- for (;;) {
- char path[l];
-
- r = ttyname_r(fd, path, sizeof(path));
- if (r == 0) {
- const char *p;
- char *c;
-
- p = startswith(path, "/dev/");
- c = strdup(p ?: path);
- if (!c)
- return -ENOMEM;
-
- *ret = c;
- return 0;
- }
-
- if (r != ERANGE)
- return -r;
-
- l *= 2;
- }
-
- return 0;
-}
-
-int getttyname_harder(int fd, char **r) {
- int k;
- char *s;