From 71b3a63b641716165f664cf112be0673a122cea0 Mon Sep 17 00:00:00 2001 From: Waldemar Brodkorb Date: Wed, 22 Nov 2017 21:30:24 +0100 Subject: librt: fix broken posix_spawn Fix iteration over signals, synced with GNU C library code and pending patches. Issues found when running dhcpcd with hook scripts. (exit status 127) Reported-By: kapeka --- libc/sysdeps/linux/common/internal-signals.h | 79 ++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 libc/sysdeps/linux/common/internal-signals.h (limited to 'libc') diff --git a/libc/sysdeps/linux/common/internal-signals.h b/libc/sysdeps/linux/common/internal-signals.h new file mode 100644 index 000000000..65e8de34b --- /dev/null +++ b/libc/sysdeps/linux/common/internal-signals.h @@ -0,0 +1,79 @@ +/* Copyright (C) 2014-2017 Free Software Foundation, Inc. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include + +/* The signal used for asynchronous cancelation. */ +#define SIGCANCEL __SIGRTMIN + +/* Signal needed for the kernel-supported POSIX timer implementation. + We can reuse the cancellation signal since we can distinguish + cancellation from timer expirations. */ +#define SIGTIMER SIGCANCEL + +/* Signal used to implement the setuid et.al. functions. */ +#define SIGSETXID (__SIGRTMIN + 1) + +/* Return if sig is used internally. */ +static inline int +__is_internal_signal (int sig) +{ + return (sig == SIGCANCEL) || (sig == SIGTIMER) || (sig == SIGSETXID); +} + +/* Remove internal signal from the mask. */ +static inline void +__clear_internal_signals (sigset_t *set) +{ + __sigdelset (set, SIGCANCEL); + __sigdelset (set, SIGTIMER); + __sigdelset (set, SIGSETXID); +} + +#define SIGALL_SET \ + ((__sigset_t) { .__val = {[0 ... _SIGSET_NWORDS-1 ] = -1 } }) + +/* Block all signals, including internal ones. */ +static inline int +__libc_signal_block_all (sigset_t *set) +{ + INTERNAL_SYSCALL_DECL (err); + return INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_BLOCK, &SIGALL_SET, + set, _NSIG / 8); +} + +/* Block all application signals (excluding internal ones). */ +static inline int +__libc_signal_block_app (sigset_t *set) +{ + sigset_t allset = SIGALL_SET; + __clear_internal_signals (&allset); + INTERNAL_SYSCALL_DECL (err); + return INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_BLOCK, &allset, set, + _NSIG / 8); +} + +/* Restore current process signal mask. */ +static inline int +__libc_signal_restore_set (const sigset_t *set) +{ + INTERNAL_SYSCALL_DECL (err); + return INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, set, NULL, + _NSIG / 8); +} + +/* Used to communicate with signal handler. */ +extern struct xid_command *__xidcmd attribute_hidden; -- cgit v1.2.3