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Add setsid to std.(c|posix)

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The interface and errors for this seem to be very universal and
generic. Note Linux already has this defined as a syscall as well.
This commit is contained in:
Brandon Black 2025-07-11 08:33:15 -05:00 committed by Alex Rønne Petersen
parent c6a18e9534
commit e8a4e47d38
2 changed files with 15 additions and 0 deletions
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1
lib/std/c.zig
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@ -10808,6 +10808,7 @@ pub extern "c" fn if_nametoindex([*:0]const u8) c_int;
pub extern "c" fn getpid() pid_t;
pub extern "c" fn getppid() pid_t;
pub extern "c" fn setsid() pid_t;
/// These are implementation defined but share identical values in at least musl and glibc:
/// - https://git.musl-libc.org/cgit/musl/tree/include/locale.h?id=ab31e9d6a0fa7c5c408856c89df2dfb12c344039#n18

14
lib/std/posix.zig
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@ -7089,6 +7089,20 @@ pub fn tcsetpgrp(handle: fd_t, pgrp: pid_t) TermioSetPgrpError!void {
}
}
pub const SetSidError = error{
/// The calling process is already a process group leader, or the process group ID of a process other than the calling process matches the process ID of the calling process.
PermissionDenied,
} || UnexpectedError;
pub fn setsid() SetSidError!pid_t {
const rc = system.setsid();
switch (errno(rc)) {
.SUCCESS => return rc,
.PERM => return error.PermissionDenied,
else => |err| return unexpectedErrno(err),
}
}
pub fn signalfd(fd: fd_t, mask: *const sigset_t, flags: u32) !fd_t {
const rc = system.signalfd(fd, mask, flags);
switch (errno(rc)) {