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https://github.com/swaywm/sway.git
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1211a81aad
This commit mostly duplicates the wlr_log functions, although with a sway_* prefix. (This is very similar to PR #2009.) However, the logging function no longer needs to be replaceable, so sway_log_init's second argument is used to set the exit callback for sway_abort. wlr_log_init is still invoked in sway/main.c This commit makes it easier to remove the wlroots dependency for the helper programs swaymsg, swaybg, swaybar, and swaynag.
104 lines
2.1 KiB
C
104 lines
2.1 KiB
C
#define _POSIX_C_SOURCE 200809L
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#include <fcntl.h>
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#include <signal.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "log.h"
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#include "sway/swaynag.h"
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bool swaynag_spawn(const char *swaynag_command,
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struct swaynag_instance *swaynag) {
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if (!swaynag_command) {
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return true;
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}
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if (swaynag->detailed) {
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if (pipe(swaynag->fd) != 0) {
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sway_log(SWAY_ERROR, "Failed to create pipe for swaynag");
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return false;
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}
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fcntl(swaynag->fd[1], F_SETFD, FD_CLOEXEC);
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}
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pid_t pid;
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if ((pid = fork()) == 0) {
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if (swaynag->detailed) {
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close(swaynag->fd[1]);
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dup2(swaynag->fd[0], STDIN_FILENO);
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close(swaynag->fd[0]);
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}
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size_t length = strlen(swaynag_command) + strlen(swaynag->args) + 2;
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char *cmd = malloc(length);
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snprintf(cmd, length, "%s %s", swaynag_command, swaynag->args);
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execl("/bin/sh", "/bin/sh", "-c", cmd, NULL);
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_exit(0);
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} else if (pid < 0) {
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sway_log(SWAY_ERROR, "Failed to create fork for swaynag");
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if (swaynag->detailed) {
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close(swaynag->fd[0]);
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close(swaynag->fd[1]);
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}
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return false;
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}
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if (swaynag->detailed) {
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close(swaynag->fd[0]);
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}
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swaynag->pid = pid;
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return true;
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}
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void swaynag_kill(struct swaynag_instance *swaynag) {
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if (swaynag->pid > 0) {
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kill(swaynag->pid, SIGTERM);
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swaynag->pid = -1;
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}
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}
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void swaynag_log(const char *swaynag_command, struct swaynag_instance *swaynag,
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const char *fmt, ...) {
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if (!swaynag_command) {
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return;
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}
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if (!swaynag->detailed) {
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sway_log(SWAY_ERROR, "Attempting to write to non-detailed swaynag inst");
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return;
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}
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if (swaynag->pid <= 0 && !swaynag_spawn(swaynag_command, swaynag)) {
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return;
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}
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va_list args;
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va_start(args, fmt);
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size_t length = vsnprintf(NULL, 0, fmt, args) + 1;
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va_end(args);
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char *temp = malloc(length + 1);
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if (!temp) {
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sway_log(SWAY_ERROR, "Failed to allocate buffer for swaynag log entry.");
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return;
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}
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va_start(args, fmt);
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vsnprintf(temp, length, fmt, args);
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va_end(args);
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write(swaynag->fd[1], temp, length);
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free(temp);
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}
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void swaynag_show(struct swaynag_instance *swaynag) {
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if (swaynag->detailed && swaynag->pid > 0) {
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close(swaynag->fd[1]);
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}
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}
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