diff options
Diffstat (limited to 'logind.c')
| -rw-r--r-- | logind.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/logind.c b/logind.c new file mode 100644 index 0000000..b426609 --- /dev/null +++ b/logind.c @@ -0,0 +1,196 @@ +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <inttypes.h> +#include <time.h> +#include <fcntl.h> +#include <ctype.h> +#include <errno.h> +#include <termios.h> + +#include <sys/stat.h> + +#include "config.h" +#ifdef HAVE_SYSTEMD +# include <systemd/sd-bus.h> +#endif + +#include "logind.h" +#include "kbd.h" + +#ifdef HAVE_SYSTEMD + +/* ---------------------------------------------------------------------- */ + +static sd_bus *logind_dbus = NULL; + +int logind_init(void) +{ + int r; + + r = sd_bus_open_system(&logind_dbus); + if (r < 0) { + fprintf(stderr, "Failed to connect to system bus: %s\n", strerror(-r)); + return -1; + } + + r = logind_take_control(); + if (r < 0) { + sd_bus_unref(logind_dbus); + logind_dbus = NULL; + return -1; + } + + fprintf(stderr, "Opening input devices via logind.\n"); + return 0; +} + +int logind_take_control(void) +{ + sd_bus_error error = SD_BUS_ERROR_NULL; + sd_bus_message *m = NULL; + int r; + + r = sd_bus_call_method(logind_dbus, + "org.freedesktop.login1", + "/org/freedesktop/login1/session/self", + "org.freedesktop.login1.Session", + "TakeControl", + &error, + &m, + "b", + false); + if (r < 0) { + fprintf(stderr, "TakeControl failed: %s\n", error.message); + sd_bus_error_free(&error); + } + sd_bus_message_unref(m); + + return r; +} + +int logind_open(const char *path, int flags, void *user_data) +{ + sd_bus_error error = SD_BUS_ERROR_NULL; + sd_bus_message *m = NULL; + struct stat st; + unsigned int maj, min; + int inactive; + int handle, fd, r; + + r = stat(path, &st); + if (r < 0) { + fprintf(stderr, "stat %s failed: %s\n", path, strerror(errno)); + libinput_deverror++; + return -1; + } + + maj = major(st.st_rdev); + min = minor(st.st_rdev); + r = sd_bus_call_method(logind_dbus, + "org.freedesktop.login1", + "/org/freedesktop/login1/session/self", + "org.freedesktop.login1.Session", + "TakeDevice", + &error, + &m, + "uu", + maj, + min); + if (r < 0) { + fprintf(stderr, "TakeDevice failed: %s\n", error.message); + sd_bus_error_free(&error); + libinput_deverror++; + return -1; + } + + handle = -1; + inactive = -1; + r = sd_bus_message_read(m, "hb", &handle, &inactive); + if (r < 0) { + fd = -1; + fprintf(stderr, "Parsing TakeDevice reply failed: %s\n", strerror(-r)); + libinput_deverror++; + } else { + fd = fcntl(handle, F_DUPFD_CLOEXEC, 0); + fprintf(stderr, "open %s: got fd %d via logind.\n", + path, fd); + libinput_devcount++; + } + sd_bus_message_unref(m); + + return fd; +} + +void logind_close(int fd, void *user_data) +{ + sd_bus_error error = SD_BUS_ERROR_NULL; + sd_bus_message *m = NULL; + struct stat st; + unsigned int maj, min; + int r; + + r = fstat(fd, &st); + if (r < 0) { + fprintf(stderr, "fstat failed: %s\n", strerror(errno)); + return; + } + close(fd); + + maj = major(st.st_rdev); + min = minor(st.st_rdev); + r = sd_bus_call_method(logind_dbus, + "org.freedesktop.login1", + "/org/freedesktop/login1/session/self", + "org.freedesktop.login1.Session", + "ReleaseDevice", + &error, + &m, + "uu", + maj, + min); + if (r < 0) { + fprintf(stderr, "ReleaseDevice failed: %s\n", error.message); + sd_bus_error_free(&error); + } + sd_bus_message_unref(m); + libinput_devcount--; + return; +} + +#else + +/* ---------------------------------------------------------------------- */ + +int logind_init(void) +{ + fprintf(stderr, "warning: compiled without logind support.\n"); + return -1; +} + +int logind_take_control(void) +{ + return -1; +} + +int logind_open(const char *path, int flags, void *user_data) +{ + fprintf(stderr, "error: compiled without logind support.\n"); + libinput_deverror++; + errno = ENOSYS; + return -1; +} + +void logind_close(int fd, void *user_data) +{ +} + +#endif + +/* ---------------------------------------------------------------------- */ + +const struct libinput_interface libinput_if_logind = { + .open_restricted = logind_open, + .close_restricted = logind_close, +}; |