gsrlabs/sys
1
0
Fork 0
mirror of https://github.com/golang/sys.git synced 2026-02-09 04:06:04 +03:00
Code Issues Packages Projects Releases Wiki Activity

unix: change Setrlimit/Prlimit to always call syscall functions

Browse Source 
As of Go 1.21 syscall.Setrlimit and syscall.prlimit can affect
starting a new process, by restoring the original NOFILE rlimit.
That is recorded locally in the syscall package, so just always
call the syscall functions.

For golang/go#46279

Change-Id: I2f3dafe5562a7dde1297bad6f5d34a80af5d620b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/476695
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
This commit is contained in:
Ian Lance Taylor
2023-03-15 12:16:22 -07:00
committed by Gopher Robot
parent 494aa493cc
commit ff18efa0a3
72 changed files with 17 additions and 618 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
unix/syscall_linux.go
View File

@@ -1873,7 +1873,6 @@ func Getpgrp() (pid int) {
//sys OpenTree(dfd int, fileName string, flags uint) (r int, err error)
//sys PerfEventOpen(attr *PerfEventAttr, pid int, cpu int, groupFd int, flags int) (fd int, err error)
//sys PivotRoot(newroot string, putold string) (err error) = SYS_PIVOT_ROOT
//sysnb Prlimit(pid int, resource int, newlimit *Rlimit, old *Rlimit) (err error) = SYS_PRLIMIT64
//sys Prctl(option int, arg2 uintptr, arg3 uintptr, arg4 uintptr, arg5 uintptr) (err error)
//sys Pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *Sigset_t) (n int, err error) = SYS_PSELECT6
//sys read(fd int, p []byte) (n int, err error)
@@ -1887,6 +1886,15 @@ func Getpgrp() (pid int) {
//sysnb Settimeofday(tv *Timeval) (err error)
//sys Setns(fd int, nstype int) (err error)
//go:linkname syscall_prlimit syscall.prlimit
func syscall_prlimit(pid, resource int, newlimit, old *syscall.Rlimit) error
func Prlimit(pid, resource int, newlimit, old *Rlimit) error {
// Just call the syscall version, because as of Go 1.21
// it will affect starting a new process.
return syscall_prlimit(pid, resource, (*syscall.Rlimit)(newlimit), (*syscall.Rlimit)(old))
}
// PrctlRetInt performs a prctl operation specified by option and further
// optional arguments arg2 through arg5 depending on option. It returns a
// non-negative integer that is returned by the prctl syscall.