f80992e329
- list all files as copyright "The River Developers" - add an AUTHORS file to acknowledge contributors
66 lines
2.2 KiB
Zig
66 lines
2.2 KiB
Zig
// This file is part of river, a dynamic tiling wayland compositor.
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//
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// Copyright 2020 The River Developers
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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const std = @import("std");
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const c = @import("../c.zig");
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const Error = @import("../command.zig").Error;
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const Seat = @import("../Seat.zig");
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/// Spawn a program.
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pub fn spawn(
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allocator: *std.mem.Allocator,
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seat: *Seat,
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args: []const []const u8,
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out: *?[]const u8,
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) Error!void {
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if (args.len < 2) return Error.NotEnoughArguments;
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const cmd = try std.mem.join(allocator, " ", args[1..]);
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defer allocator.free(cmd);
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const cmdZ = try std.cstr.addNullByte(allocator, cmd);
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defer allocator.free(cmdZ);
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const child_args = [_:null]?[*:0]const u8{ "/bin/sh", "-c", cmdZ, null };
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const pid = std.os.fork() catch {
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out.* = try std.fmt.allocPrint(allocator, "fork/execve failed", .{});
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return Error.Other;
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};
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if (pid == 0) {
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// Clean things up for the child in an intermediate fork
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if (c.setsid() < 0) unreachable;
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if (std.os.system.sigprocmask(std.os.SIG_SETMASK, &std.os.empty_sigset, null) < 0) unreachable;
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const pid2 = std.os.fork() catch c._exit(1);
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if (pid2 == 0) std.os.execveZ("/bin/sh", &child_args, std.c.environ) catch c._exit(1);
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c._exit(0);
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}
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// Wait the intermediate child.
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const ret = std.os.waitpid(pid, 0);
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if (!std.os.WIFEXITED(ret.status) or
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(std.os.WIFEXITED(ret.status) and std.os.WEXITSTATUS(ret.status) != 0))
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{
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out.* = try std.fmt.allocPrint(allocator, "fork/execve failed", .{});
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return Error.Other;
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}
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}
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