Use execlp("sh") instead of execl("/bin/sh")

This stops assuming the POSIX shell command is located in /bin.

sway/commands/exec_always.c

@@ -65,7 +65,7 @@ struct cmd_results *cmd_exec_process(int argc, char **argv) {
 		close(fd[0]);
 		if ((child = fork()) == 0) {
 			close(fd[1]);
-			execl("/bin/sh", "/bin/sh", "-c", cmd, (void *)NULL);
+			execlp("sh", "sh", "-c", cmd, (void *)NULL);
 			_exit(0);
 		}
 		ssize_t s = 0;

sway/swaynag.c

@@ -87,8 +87,8 @@ bool swaynag_spawn(const char *swaynag_command,
 			size_t length = strlen(swaynag_command) + strlen(swaynag->args) + 2;
 			char *cmd = malloc(length);
 			snprintf(cmd, length, "%s %s", swaynag_command, swaynag->args);
-			execl("/bin/sh", "/bin/sh", "-c", cmd, NULL);
-			sway_log_errno(SWAY_ERROR, "execl failed");
+			execlp("sh", "sh", "-c", cmd, NULL);
+			sway_log_errno(SWAY_ERROR, "execlp failed");
 			_exit(EXIT_FAILURE);
 		}
 		_exit(EXIT_SUCCESS);

swaynag/swaynag.c

@@ -30,8 +30,8 @@ static bool terminal_execute(char *terminal, char *command) {
 	chmod(fname, S_IRUSR | S_IWUSR | S_IXUSR);
 	char *cmd = malloc(sizeof(char) * (strlen(terminal) + strlen(" -e ") + strlen(fname) + 1));
 	sprintf(cmd, "%s -e %s", terminal, fname);
-	execl("/bin/sh", "/bin/sh", "-c", cmd, NULL);
-	sway_log_errno(SWAY_ERROR, "Failed to run command, execl() returned.");
+	execlp("sh", "sh", "-c", cmd, NULL);
+	sway_log_errno(SWAY_ERROR, "Failed to run command, execlp() returned.");
 	free(cmd);
 	return false;
 }
@@ -69,8 +69,8 @@ static void swaynag_button_execute(struct swaynag *swaynag,
 						sway_log(SWAY_DEBUG,
 								"$TERMINAL not found. Running directly");
 					}
-					execl("/bin/sh", "/bin/sh", "-c", button->action, NULL);
-					sway_log_errno(SWAY_DEBUG, "execl failed");
+					execlp("sh", "sh", "-c", button->action, NULL);
+					sway_log_errno(SWAY_DEBUG, "execlp failed");
 					_exit(EXIT_FAILURE);
 				}
 			}