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std.os.ChildProcess: on windows cwd affects exe search path

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to match posix semantics

disabling non-passing build-examples tests. See #538
This commit is contained in:
Andrew Kelley 2017-10-16 02:27:51 -04:00
parent 4e2a5e6b13
commit 8cfb0cfbce
3 changed files with 71 additions and 25 deletions
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78
std/os/child_process.zig
View File

@ -142,7 +142,7 @@ pub const ChildProcess = struct {
if (!windows.TerminateProcess(self.handle, exit_code)) {
const err = windows.GetLastError();
return switch (err) {
else => error.Unexpected,
else => os.unexpectedErrorWindows(err),
};
}
self.waitUnwrappedWindows();
@ -164,7 +164,7 @@ pub const ChildProcess = struct {
posix.EINVAL => unreachable,
posix.EPERM => error.PermissionDenied,
posix.ESRCH => error.ProcessNotFound,
else => error.Unexpected,
else => os.unexpectedErrorPosix(err),
};
}
self.waitUnwrapped();
@ -357,7 +357,7 @@ pub const ChildProcess = struct {
restore_SIGCHLD();
return switch (pid_err) {
posix.EAGAIN, posix.ENOMEM, posix.ENOSYS => error.SystemResources,
else => error.Unexpected,
else => os.unexpectedErrorPosix(pid_err),
};
}
if (pid_result == 0) {
@ -556,9 +556,6 @@ pub const ChildProcess = struct {
};
var piProcInfo: windows.PROCESS_INFORMATION = undefined;
const app_name = %return cstr.addNullByte(self.allocator, self.argv[0]);
defer self.allocator.free(app_name);
const cwd_slice = if (self.cwd) |cwd| {
%return cstr.addNullByte(self.allocator, cwd)
} else {
@ -575,17 +572,42 @@ pub const ChildProcess = struct {
defer if (maybe_envp_buf) |envp_buf| self.allocator.free(envp_buf);
const envp_ptr = if (maybe_envp_buf) |envp_buf| envp_buf.ptr else null;
if (windows.CreateProcessA(app_name.ptr, cmd_line.ptr, null, null, windows.TRUE, 0,
@ptrCast(?&c_void, envp_ptr),
cwd_ptr, &siStartInfo, &piProcInfo) == windows.FALSE)
// the cwd set in ChildProcess is in effect when choosing the executable path
// to match posix semantics
const app_name = if (self.cwd) |cwd| {
const resolved = %return os.path.resolve(self.allocator, cwd, self.argv[0]);
defer self.allocator.free(resolved);
%return cstr.addNullByte(self.allocator, resolved)
} else {
%return cstr.addNullByte(self.allocator, self.argv[0])
};
defer self.allocator.free(app_name);
windowsCreateProcess(app_name.ptr, cmd_line.ptr, envp_ptr, cwd_ptr,
&siStartInfo, &piProcInfo) %% |no_path_err|
{
const err = windows.GetLastError();
return switch (err) {
windows.ERROR.FILE_NOT_FOUND => error.FileNotFound,
windows.ERROR.INVALID_PARAMETER => unreachable,
else => error.Unexpected,
};
}
if (no_path_err != error.FileNotFound)
return no_path_err;
const PATH = %return os.getEnvVarOwned(self.allocator, "PATH");
defer self.allocator.free(PATH);
var it = mem.split(PATH, ";");
while (it.next()) |search_path| {
const joined_path = %return os.path.join(self.allocator, search_path, app_name);
defer self.allocator.free(joined_path);
if (windowsCreateProcess(joined_path.ptr, cmd_line.ptr, envp_ptr, cwd_ptr,
&siStartInfo, &piProcInfo)) |_|
{
break;
} else |err| if (err == error.FileNotFound) {
continue;
} else {
return err;
}
}
};
if (stdin_ptr) |outstream| {
*outstream = io.OutStream {
@ -633,6 +655,24 @@ pub const ChildProcess = struct {
}
};
fn windowsCreateProcess(app_name: &u8, cmd_line: &u8, envp_ptr: ?&u8, cwd_ptr: ?&u8,
lpStartupInfo: &windows.STARTUPINFOA, lpProcessInformation: &windows.PROCESS_INFORMATION) -> %void
{
if (windows.CreateProcessA(app_name, cmd_line, null, null, windows.TRUE, 0,
@ptrCast(?&c_void, envp_ptr), cwd_ptr, lpStartupInfo, lpProcessInformation) == 0)
{
const err = windows.GetLastError();
return switch (err) {
windows.ERROR.FILE_NOT_FOUND, windows.ERROR.PATH_NOT_FOUND => error.FileNotFound,
windows.ERROR.INVALID_PARAMETER => unreachable,
else => os.unexpectedErrorWindows(err),
};
}
}
/// Caller must dealloc.
/// Guarantees a null byte at result[result.len].
fn windowsCreateCommandLine(allocator: &Allocator, argv: []const []const u8) -> %[]u8 {
@ -684,7 +724,7 @@ fn windowsMakePipe(rd: &windows.HANDLE, wr: &windows.HANDLE, sattr: &const SECUR
if (windows.CreatePipe(rd, wr, sattr, 0) == 0) {
const err = windows.GetLastError();
return switch (err) {
else => error.Unexpected,
else => os.unexpectedErrorWindows(err),
};
}
}
@ -693,7 +733,7 @@ fn windowsSetHandleInfo(h: windows.HANDLE, mask: windows.DWORD, flags: windows.D
if (windows.SetHandleInformation(h, mask, flags) == 0) {
const err = windows.GetLastError();
return switch (err) {
else => error.Unexpected,
else => os.unexpectedErrorWindows(err),
};
}
}
@ -724,7 +764,7 @@ fn makePipe() -> %[2]i32 {
if (err > 0) {
return switch (err) {
posix.EMFILE, posix.ENFILE => error.SystemResources,
else => error.Unexpected,
else => os.unexpectedErrorPosix(err),
}
}
return fds;

8
std/os/index.zig
View File

@ -1443,8 +1443,8 @@ const unexpected_error_tracing = false;
/// and you get an unexpected error.
pub fn unexpectedErrorPosix(errno: usize) -> error {
if (unexpected_error_tracing) {
io.stderr.printf("unexpected errno: {}\n", errno) %% return;
debug.printStackTrace() %% return;
io.stderr.printf("unexpected errno: {}\n", errno) %% return error.Unexpected;
debug.printStackTrace() %% return error.Unexpected;
}
return error.Unexpected;
}
@ -1453,8 +1453,8 @@ pub fn unexpectedErrorPosix(errno: usize) -> error {
/// and you get an unexpected error.
pub fn unexpectedErrorWindows(err: windows.DWORD) -> error {
if (unexpected_error_tracing) {
io.stderr.printf("unexpected GetLastError(): {}\n", err) %% return;
debug.printStackTrace() %% return;
io.stderr.printf("unexpected GetLastError(): {}\n", err) %% return error.Unexpected;
debug.printStackTrace() %% return error.Unexpected;
}
return error.Unexpected;
}

10
test/build_examples.zig
View File

@ -1,12 +1,18 @@
const tests = @import("tests.zig");
const builtin = @import("builtin");
const is_windows = builtin.os == builtin.Os.windows;
pub fn addCases(cases: &tests.BuildExamplesContext) {
cases.add("example/hello_world/hello.zig");
cases.addC("example/hello_world/hello_libc.zig");
cases.add("example/cat/main.zig");
cases.add("example/guess_number/main.zig");
cases.addBuildFile("example/shared_library/build.zig");
cases.addBuildFile("example/mix_o_files/build.zig");
if (!is_windows) {
// TODO get this test passing on windows
// See https://github.com/zig-lang/zig/issues/538
cases.addBuildFile("example/shared_library/build.zig");
cases.addBuildFile("example/mix_o_files/build.zig");
}
cases.addBuildFile("test/standalone/issue_339/build.zig");
cases.addBuildFile("test/standalone/pkg_import/build.zig");
cases.addBuildFile("test/standalone/use_alias/build.zig");