[Bug gdb/18653] New: spawn changes SIGPIPE SIG_DFL to SIG_IGN

["jan.kratochvil at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=18653

            Bug ID: 18653
           Summary: spawn changes SIGPIPE SIG_DFL to SIG_IGN
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: jan.kratochvil at redhat dot com
  Target Milestone: ---

That is a program run under GDB "run" behaves differently than standalone.

standalone:                 SIG_DFL
GDB linux-nat:        FAIL: SIG_IGN
GDB gdbserver legacy: PASS: SIG_DFL
GDB gdbserver multi:  FAIL: SIG_IGN

-----------------------------------------
#define _GNU_SOURCE
#include <stdio.h>
#include <signal.h>
int main(void) {
  sighandler_t s=signal(SIGPIPE,SIG_DFL);
  if (s==SIG_DFL) puts("SIG_DFL");
  if (s==SIG_IGN) puts("SIG_IGN");
  return 0;
}

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