mirror of
https://codeberg.org/dnkl/foot.git
synced 2026-02-05 04:06:08 -05:00
99d5bf64bc
This is an application of the xdg activation protocol that will allow compositors to associate new foot toplevels with the command that launched them. footclient receives an activation token from the launcher which the compositor can use to track application startup. It passes the token to the foot server, which then activates the new window with the token to complete the startup sequence.
597 lines
18 KiB
C
597 lines
18 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdbool.h>
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#include <locale.h>
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#include <getopt.h>
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#include <signal.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/utsname.h>
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#include <fcntl.h>
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#include <fcft/fcft.h>
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#define LOG_MODULE "main"
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#define LOG_ENABLE_DBG 0
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#include "log.h"
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#include "config.h"
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#include "foot-features.h"
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#include "fdm.h"
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#include "macros.h"
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#include "reaper.h"
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#include "render.h"
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#include "server.h"
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#include "shm.h"
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#include "terminal.h"
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#include "util.h"
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#include "version.h"
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#include "xmalloc.h"
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#include "xsnprintf.h"
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static bool
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fdm_sigint(struct fdm *fdm, int signo, void *data)
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{
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*(volatile sig_atomic_t *)data = true;
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return true;
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}
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static const char *
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version_and_features(void)
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{
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static char buf[256];
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snprintf(buf, sizeof(buf), "version: %s %cpgo %cime %cgraphemes %cassertions",
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FOOT_VERSION,
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feature_pgo() ? '+' : '-',
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feature_ime() ? '+' : '-',
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feature_graphemes() ? '+' : '-',
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feature_assertions() ? '+' : '-');
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return buf;
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}
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static void
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print_usage(const char *prog_name)
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{
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static const char options[] =
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"\nOptions:\n"
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" -c,--config=PATH load configuration from PATH ($XDG_CONFIG_HOME/foot/foot.ini)\n"
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" -C,--check-config verify configuration, exit with 0 if ok, otherwise exit with 1\n"
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" -o,--override=[section.]key=value override configuration option\n"
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" -f,--font=FONT comma separated list of fonts in fontconfig format (monospace)\n"
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" -t,--term=TERM value to set the environment variable TERM to (" FOOT_DEFAULT_TERM ")\n"
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" -T,--title=TITLE initial window title (foot)\n"
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" -a,--app-id=ID window application ID (foot)\n"
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" -m,--maximized start in maximized mode\n"
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" -F,--fullscreen start in fullscreen mode\n"
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" -L,--login-shell start shell as a login shell\n"
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" -D,--working-directory=DIR directory to start in (CWD)\n"
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" -w,--window-size-pixels=WIDTHxHEIGHT initial width and height, in pixels\n"
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" -W,--window-size-chars=WIDTHxHEIGHT initial width and height, in characters\n"
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" -s,--server[=PATH] run as a server (use 'footclient' to start terminals).\n"
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" Without PATH, $XDG_RUNTIME_DIR/foot-$WAYLAND_DISPLAY.sock will be used.\n"
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" -H,--hold remain open after child process exits\n"
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" -p,--print-pid=FILE|FD print PID to file or FD (only applicable in server mode)\n"
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" -d,--log-level={info|warning|error|none} log level (info)\n"
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" -l,--log-colorize=[{never|always|auto}] enable/disable colorization of log output on stderr\n"
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" -s,--log-no-syslog disable syslog logging (only applicable in server mode)\n"
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" -v,--version show the version number and quit\n"
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" -e ignored (for compatibility with xterm -e)\n";
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printf("Usage: %s [OPTIONS...]\n", prog_name);
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printf("Usage: %s [OPTIONS...] command [ARGS...]\n", prog_name);
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puts(options);
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}
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bool
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locale_is_utf8(void)
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{
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xassert(strlen(u8"ö") == 2);
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wchar_t w;
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if (mbtowc(&w, u8"ö", 2) != 2)
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return false;
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if (w != U'ö')
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return false;
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return true;
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}
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struct shutdown_context {
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struct terminal **term;
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int exit_code;
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};
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static void
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term_shutdown_cb(void *data, int exit_code)
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{
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struct shutdown_context *ctx = data;
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*ctx->term = NULL;
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ctx->exit_code = exit_code;
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}
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static bool
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print_pid(const char *pid_file, bool *unlink_at_exit)
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{
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LOG_DBG("printing PID to %s", pid_file);
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errno = 0;
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char *end;
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int pid_fd = strtoul(pid_file, &end, 10);
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if (errno != 0 || *end != '\0') {
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if ((pid_fd = open(pid_file,
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O_WRONLY | O_CREAT | O_EXCL | O_CLOEXEC,
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S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) < 0) {
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LOG_ERRNO("%s: failed to open", pid_file);
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return false;
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} else
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*unlink_at_exit = true;
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}
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if (pid_fd >= 0) {
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char pid[32];
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size_t n = xsnprintf(pid, sizeof(pid), "%u\n", getpid());
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ssize_t bytes = write(pid_fd, pid, n);
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close(pid_fd);
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if (bytes < 0) {
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LOG_ERRNO("failed to write PID to FD=%u", pid_fd);
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return false;
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}
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LOG_DBG("wrote %zd bytes to FD=%d", bytes, pid_fd);
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return true;
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} else
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return false;
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}
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int
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main(int argc, char *const *argv)
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{
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/* Custom exit code, to enable users to differentiate between foot
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* itself failing, and the client application failiing */
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static const int foot_exit_failure = -26;
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int ret = foot_exit_failure;
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/* XDG startup notifications */
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const char *token = getenv("XDG_ACTIVATION_TOKEN");
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unsetenv("XDG_ACTIVATION_TOKEN");
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/* Startup notifications; we don't support it, but must ensure we
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* don't pass this on to programs launched by us */
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unsetenv("DESKTOP_STARTUP_ID");
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const char *const prog_name = argv[0];
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static const struct option longopts[] = {
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{"config", required_argument, NULL, 'c'},
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{"check-config", no_argument, NULL, 'C'},
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{"override", required_argument, NULL, 'o'},
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{"term", required_argument, NULL, 't'},
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{"title", required_argument, NULL, 'T'},
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{"app-id", required_argument, NULL, 'a'},
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{"login-shell", no_argument, NULL, 'L'},
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{"working-directory", required_argument, NULL, 'D'},
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{"font", required_argument, NULL, 'f'},
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{"window-size-pixels", required_argument, NULL, 'w'},
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{"window-size-chars", required_argument, NULL, 'W'},
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{"server", optional_argument, NULL, 's'},
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{"hold", no_argument, NULL, 'H'},
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{"maximized", no_argument, NULL, 'm'},
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{"fullscreen", no_argument, NULL, 'F'},
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{"presentation-timings", no_argument, NULL, 'P'}, /* Undocumented */
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{"print-pid", required_argument, NULL, 'p'},
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{"log-level", required_argument, NULL, 'd'},
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{"log-colorize", optional_argument, NULL, 'l'},
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{"log-no-syslog", no_argument, NULL, 'S'},
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{"version", no_argument, NULL, 'v'},
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{"help", no_argument, NULL, 'h'},
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{NULL, no_argument, NULL, 0},
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};
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bool check_config = false;
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const char *conf_path = NULL;
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const char *conf_term = NULL;
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const char *conf_title = NULL;
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const char *conf_app_id = NULL;
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const char *custom_cwd = NULL;
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bool login_shell = false;
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tll(char *) conf_fonts = tll_init();
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enum conf_size_type conf_size_type = CONF_SIZE_PX;
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int conf_width = -1;
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int conf_height = -1;
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bool as_server = false;
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const char *conf_server_socket_path = NULL;
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bool presentation_timings = false;
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bool hold = false;
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bool maximized = false;
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bool fullscreen = false;
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bool unlink_pid_file = false;
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const char *pid_file = NULL;
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enum log_class log_level = LOG_CLASS_INFO;
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enum log_colorize log_colorize = LOG_COLORIZE_AUTO;
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bool log_syslog = true;
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user_notifications_t user_notifications = tll_init();
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config_override_t overrides = tll_init();
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while (true) {
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int c = getopt_long(argc, argv, "+c:Co:t:T:a:LD:f:w:W:s::HmFPp:d:l::Sveh", longopts, NULL);
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if (c == -1)
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break;
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switch (c) {
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case 'c':
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conf_path = optarg;
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break;
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case 'C':
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check_config = true;
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break;
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case 'o':
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tll_push_back(overrides, optarg);
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break;
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case 't':
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conf_term = optarg;
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break;
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case 'L':
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login_shell = true;
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break;
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case 'T':
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conf_title = optarg;
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break;
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case 'a':
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conf_app_id = optarg;
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break;
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case 'D': {
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struct stat st;
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if (stat(optarg, &st) < 0 || !(st.st_mode & S_IFDIR)) {
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fprintf(stderr, "error: %s: not a directory\n", optarg);
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return ret;
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}
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custom_cwd = optarg;
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break;
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}
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case 'f':
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tll_free_and_free(conf_fonts, free);
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for (char *font = strtok(optarg, ","); font != NULL; font = strtok(NULL, ",")) {
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/* Strip leading spaces */
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while (*font != '\0' && isspace(*font))
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font++;
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/* Strip trailing spaces */
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char *end = font + strlen(font);
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xassert(*end == '\0');
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end--;
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while (end > font && isspace(*end))
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*(end--) = '\0';
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if (strlen(font) == 0)
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continue;
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tll_push_back(conf_fonts, font);
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}
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break;
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case 'w': {
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unsigned width, height;
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if (sscanf(optarg, "%ux%u", &width, &height) != 2 || width == 0 || height == 0) {
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fprintf(stderr, "error: invalid window-size-pixels: %s\n", optarg);
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return ret;
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}
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conf_size_type = CONF_SIZE_PX;
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conf_width = width;
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conf_height = height;
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break;
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}
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case 'W': {
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unsigned width, height;
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if (sscanf(optarg, "%ux%u", &width, &height) != 2 || width == 0 || height == 0) {
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fprintf(stderr, "error: invalid window-size-chars: %s\n", optarg);
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return ret;
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}
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conf_size_type = CONF_SIZE_CELLS;
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conf_width = width;
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conf_height = height;
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break;
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}
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case 's':
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as_server = true;
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if (optarg != NULL)
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conf_server_socket_path = optarg;
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break;
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case 'P':
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presentation_timings = true;
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break;
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case 'H':
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hold = true;
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break;
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case 'm':
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maximized = true;
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fullscreen = false;
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break;
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case 'F':
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fullscreen = true;
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maximized = false;
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break;
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case 'p':
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pid_file = optarg;
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break;
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case 'd': {
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int lvl = log_level_from_string(optarg);
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if (unlikely(lvl < 0)) {
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fprintf(
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stderr,
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"-d,--log-level: %s: argument must be one of %s\n",
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optarg,
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log_level_string_hint());
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return ret;
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}
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log_level = lvl;
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break;
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}
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case 'l':
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if (optarg == NULL || strcmp(optarg, "auto") == 0)
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log_colorize = LOG_COLORIZE_AUTO;
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else if (strcmp(optarg, "never") == 0)
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log_colorize = LOG_COLORIZE_NEVER;
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else if (strcmp(optarg, "always") == 0)
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log_colorize = LOG_COLORIZE_ALWAYS;
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else {
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fprintf(stderr, "%s: argument must be one of 'never', 'always' or 'auto'\n", optarg);
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return ret;
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}
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break;
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case 'S':
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log_syslog = false;
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break;
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case 'v':
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printf("foot %s\n", version_and_features());
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return EXIT_SUCCESS;
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case 'h':
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print_usage(prog_name);
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return EXIT_SUCCESS;
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case 'e':
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break;
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case '?':
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return ret;
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}
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}
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log_init(log_colorize, as_server && log_syslog,
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as_server ? LOG_FACILITY_DAEMON : LOG_FACILITY_USER, log_level);
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_Static_assert((int)LOG_CLASS_ERROR == (int)FCFT_LOG_CLASS_ERROR,
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"fcft log level enum offset");
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_Static_assert((int)LOG_COLORIZE_ALWAYS == (int)FCFT_LOG_COLORIZE_ALWAYS,
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"fcft colorize enum mismatch");
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fcft_log_init(
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(enum fcft_log_colorize)log_colorize,
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as_server && log_syslog,
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(enum fcft_log_class)log_level);
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argc -= optind;
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argv += optind;
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LOG_INFO("%s", version_and_features());
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{
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struct utsname name;
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if (uname(&name) < 0)
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LOG_ERRNO("uname() failed");
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else
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LOG_INFO("arch: %s %s/%zu-bit",
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name.sysname, name.machine, sizeof(void *) * 8);
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}
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srand(time(NULL));
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setlocale(LC_CTYPE, "");
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LOG_INFO("locale: %s", setlocale(LC_CTYPE, NULL));
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if (!locale_is_utf8()) {
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LOG_ERR("locale is not UTF-8");
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return ret;
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}
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struct config conf = {NULL};
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bool conf_successful = config_load(&conf, conf_path, &user_notifications, &overrides, check_config);
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tll_free(overrides);
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if (!conf_successful) {
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config_free(conf);
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return ret;
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}
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if (check_config) {
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config_free(conf);
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return EXIT_SUCCESS;
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}
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fcft_set_scaling_filter(conf.tweak.fcft_filter);
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if (conf_term != NULL) {
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free(conf.term);
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conf.term = xstrdup(conf_term);
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}
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if (conf_title != NULL) {
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free(conf.title);
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conf.title = xstrdup(conf_title);
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}
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if (conf_app_id != NULL) {
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free(conf.app_id);
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conf.app_id = xstrdup(conf_app_id);
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}
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if (login_shell)
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conf.login_shell = true;
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if (tll_length(conf_fonts) > 0) {
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for (size_t i = 0; i < ALEN(conf.fonts); i++)
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config_font_list_destroy(&conf.fonts[i]);
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struct config_font_list *font_list = &conf.fonts[0];
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xassert(font_list->count == 0);
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xassert(font_list->arr == NULL);
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font_list->arr = xmalloc(
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tll_length(conf_fonts) * sizeof(font_list->arr[0]));
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tll_foreach(conf_fonts, it) {
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struct config_font font;
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if (!config_font_parse(it->item, &font)) {
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LOG_ERR("%s: invalid font specification", it->item);
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} else
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font_list->arr[font_list->count++] = font;
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}
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tll_free(conf_fonts);
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}
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if (conf_width > 0 && conf_height > 0) {
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conf.size.type = conf_size_type;
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conf.size.width = conf_width;
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conf.size.height = conf_height;
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}
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if (conf_server_socket_path != NULL) {
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free(conf.server_socket_path);
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conf.server_socket_path = xstrdup(conf_server_socket_path);
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}
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if (maximized)
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conf.startup_mode = STARTUP_MAXIMIZED;
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else if (fullscreen)
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conf.startup_mode = STARTUP_FULLSCREEN;
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conf.presentation_timings = presentation_timings;
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conf.hold_at_exit = hold;
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if (conf.tweak.font_monospace_warn && conf.fonts[0].count > 0) {
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check_if_font_is_monospaced(
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conf.fonts[0].arr[0].pattern, &conf.notifications);
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}
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struct fdm *fdm = NULL;
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struct reaper *reaper = NULL;
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struct wayland *wayl = NULL;
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struct renderer *renderer = NULL;
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struct terminal *term = NULL;
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struct server *server = NULL;
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struct shutdown_context shutdown_ctx = {.term = &term, .exit_code = foot_exit_failure};
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const char *cwd = custom_cwd;
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char *_cwd = NULL;
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if (cwd == NULL) {
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errno = 0;
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size_t buf_len = 1024;
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do {
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_cwd = xrealloc(_cwd, buf_len);
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if (getcwd(_cwd, buf_len) == NULL && errno != ERANGE) {
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LOG_ERRNO("failed to get current working directory");
|
|
goto out;
|
|
}
|
|
buf_len *= 2;
|
|
} while (errno == ERANGE);
|
|
cwd = _cwd;
|
|
}
|
|
|
|
shm_set_max_pool_size(conf.tweak.max_shm_pool_size);
|
|
|
|
if ((fdm = fdm_init()) == NULL)
|
|
goto out;
|
|
|
|
if ((reaper = reaper_init(fdm)) == NULL)
|
|
goto out;
|
|
|
|
if ((wayl = wayl_init(&conf, fdm)) == NULL)
|
|
goto out;
|
|
|
|
if ((renderer = render_init(fdm, wayl)) == NULL)
|
|
goto out;
|
|
|
|
if (!as_server && (term = term_init(
|
|
&conf, fdm, reaper, wayl, "foot", cwd, token,
|
|
argc, argv,
|
|
&term_shutdown_cb, &shutdown_ctx)) == NULL) {
|
|
goto out;
|
|
}
|
|
free(_cwd);
|
|
_cwd = NULL;
|
|
|
|
if (as_server && (server = server_init(&conf, fdm, reaper, wayl)) == NULL)
|
|
goto out;
|
|
|
|
volatile sig_atomic_t aborted = false;
|
|
if (!fdm_signal_add(fdm, SIGINT, &fdm_sigint, (void *)&aborted) ||
|
|
!fdm_signal_add(fdm, SIGTERM, &fdm_sigint, (void *)&aborted))
|
|
{
|
|
goto out;
|
|
}
|
|
|
|
if (sigaction(SIGHUP, &(struct sigaction){.sa_handler = SIG_IGN}, NULL) < 0) {
|
|
LOG_ERRNO("failed to ignore SIGHUP");
|
|
goto out;
|
|
}
|
|
|
|
if (as_server)
|
|
LOG_INFO("running as server; launch terminals by running footclient");
|
|
|
|
if (as_server && pid_file != NULL) {
|
|
if (!print_pid(pid_file, &unlink_pid_file))
|
|
goto out;
|
|
}
|
|
|
|
while (likely(!aborted && (as_server || tll_length(wayl->terms) > 0))) {
|
|
if (unlikely(!fdm_poll(fdm)))
|
|
break;
|
|
}
|
|
|
|
if (aborted || tll_length(wayl->terms) == 0)
|
|
ret = EXIT_SUCCESS;
|
|
|
|
out:
|
|
free(_cwd);
|
|
server_destroy(server);
|
|
term_destroy(term);
|
|
|
|
shm_fini();
|
|
render_destroy(renderer);
|
|
wayl_destroy(wayl);
|
|
reaper_destroy(reaper);
|
|
fdm_signal_del(fdm, SIGTERM);
|
|
fdm_signal_del(fdm, SIGINT);
|
|
fdm_destroy(fdm);
|
|
|
|
config_free(conf);
|
|
|
|
if (unlink_pid_file)
|
|
unlink(pid_file);
|
|
|
|
LOG_INFO("goodbye");
|
|
log_deinit();
|
|
return ret == EXIT_SUCCESS && !as_server ? shutdown_ctx.exit_code : ret;
|
|
}
|