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add std.os.linux.vfork and std.os.linux.exit_group

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Andrew Kelley 2018-10-02 14:08:32 -04:00
parent 364bc66924
commit acefcdbca5
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GPG Key ID: 4E7CD66038A4D47C
2 changed files with 32 additions and 11 deletions
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29
std/os/index.zig
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@ -634,18 +634,25 @@ pub const PosixExecveError = error{
fn posixExecveErrnoToErr(err: usize) PosixExecveError {
assert(err > 0);
return switch (err) {
switch (err) {
posix.EFAULT => unreachable,
posix.E2BIG, posix.EMFILE, posix.ENAMETOOLONG, posix.ENFILE, posix.ENOMEM => error.SystemResources,
posix.EACCES, posix.EPERM => error.AccessDenied,
posix.EINVAL, posix.ENOEXEC => error.InvalidExe,
posix.EIO, posix.ELOOP => error.FileSystem,
posix.EISDIR => error.IsDir,
posix.ENOENT => error.FileNotFound,
posix.ENOTDIR => error.NotDir,
posix.ETXTBSY => error.FileBusy,
else => unexpectedErrorPosix(err),
};
posix.E2BIG => return error.SystemResources,
posix.EMFILE => return error.SystemResources,
posix.ENAMETOOLONG => return error.SystemResources,
posix.ENFILE => return error.SystemResources,
posix.ENOMEM => return error.SystemResources,
posix.EACCES => return error.AccessDenied,
posix.EPERM => return error.AccessDenied,
posix.EINVAL => return error.InvalidExe,
posix.ENOEXEC => return error.InvalidExe,
posix.EIO => return error.FileSystem,
posix.ELOOP => return error.FileSystem,
posix.EISDIR => return error.IsDir,
posix.ENOENT => return error.FileNotFound,
posix.ENOTDIR => return error.NotDir,
posix.ETXTBSY => return error.FileBusy,
else => return unexpectedErrorPosix(err),
}
}
pub var linux_aux_raw = []usize{0} ** 38;

14
std/os/linux/index.zig
View File

@ -719,6 +719,15 @@ pub fn fork() usize {
return syscall0(SYS_fork);
}
/// This must be inline, and inline call the syscall function, because if the
/// child does a return it will clobber the parent's stack.
/// It is advised to avoid this function and use clone instead, because
/// the compiler is not aware of how vfork affects control flow and you may
/// see different results in optimized builds.
pub inline fn vfork() usize {
return @inlineCall(syscall0, SYS_vfork);
}
pub fn futex_wait(uaddr: usize, futex_op: u32, val: i32, timeout: ?*timespec) usize {
return syscall4(SYS_futex, uaddr, futex_op, @bitCast(u32, val), @ptrToInt(timeout));
}
@ -883,6 +892,11 @@ pub fn exit(status: i32) noreturn {
unreachable;
}
pub fn exit_group(status: i32) noreturn {
_ = syscall1(SYS_exit_group, @bitCast(usize, isize(status)));
unreachable;
}
pub fn getrandom(buf: [*]u8, count: usize, flags: u32) usize {
return syscall3(SYS_getrandom, @ptrToInt(buf), count, @intCast(usize, flags));
}