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syscall: clarify Pdeathsig documentation on Linux

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This is a rather large footgun, so let's mention that it sends the signal on thread termination and not process termination in the documentation.

Updates #27505

Change-Id: I489cf7136e34a1a7896067ae24187b0d523d987e
GitHub-Last-Rev: c8722b25d1
GitHub-Pull-Request: golang/go#53365
Reviewed-on: https://go-review.googlesource.com/c/go/+/412114
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Vojtěch Boček 2022-06-15 09:36:27 +00:00 committed by Gopher Robot
parent 74bf90c779
commit 0e3d0c9581
1 changed files with 5 additions and 1 deletions
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6
src/syscall/exec_linux.go
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@ -45,7 +45,11 @@ type SysProcAttr struct {
// number in the parent process.
Foreground bool
Pgid int // Child's process group ID if Setpgid.
Pdeathsig Signal // Signal that the process will get when its parent dies (Linux and FreeBSD only)
// Pdeathsig, if non-zero, is a signal that the kernel will send to
// the child process when the creating thread dies. Note that the signal
// is sent on thread termination, which may happen before process termination.
// There are more details at https://go.dev/issue/27505.
Pdeathsig Signal
Cloneflags uintptr // Flags for clone calls (Linux only)
Unshareflags uintptr // Flags for unshare calls (Linux only)
UidMappings []SysProcIDMap // User ID mappings for user namespaces.