diff options
Diffstat (limited to 'tools/squashfs4/patches/005-Don-t-use-sigwaitinfo-sigtimedwait-if-not-supported.patch')
| -rw-r--r-- | tools/squashfs4/patches/005-Don-t-use-sigwaitinfo-sigtimedwait-if-not-supported.patch | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/tools/squashfs4/patches/005-Don-t-use-sigwaitinfo-sigtimedwait-if-not-supported.patch b/tools/squashfs4/patches/005-Don-t-use-sigwaitinfo-sigtimedwait-if-not-supported.patch new file mode 100644 index 0000000000..80e8824c46 --- /dev/null +++ b/tools/squashfs4/patches/005-Don-t-use-sigwaitinfo-sigtimedwait-if-not-supported.patch @@ -0,0 +1,192 @@ +From dbe9747b4f09bd2f4d63af06e55c2c3ed35bfca1 Mon Sep 17 00:00:00 2001 +From: Phillip Lougher <phillip@squashfs.org.uk> +Date: Tue, 7 Feb 2023 23:09:30 +0000 +Subject: [PATCH] Don't use sigwaitinfo()/sigtimedwait() if not supported + +If sigwaitinfo() and sigtimedwait() are not supported, +use sigwait() instead. + +This will disable the queue/caches dump if ^\ (SIGQUIT) +is hit twice within a second. + +But the queue/caches dump is still available if SIGHUP +is sent to the program. + +Currently this check is applied to MAC OS X. FreeBSD and +NetBSD appear to have these functions. + +Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk> +--- + squashfs-tools/info.c | 25 ++------------- + squashfs-tools/signals.h | 54 ++++++++++++++++++++++++++++++++ + squashfs-tools/unsquashfs_info.c | 25 ++------------- + 3 files changed, 60 insertions(+), 44 deletions(-) + create mode 100644 squashfs-tools/signals.h + +--- a/squashfs-tools/info.c ++++ b/squashfs-tools/info.c +@@ -2,7 +2,7 @@ + * Create a squashfs filesystem. This is a highly compressed read only + * filesystem. + * +- * Copyright (c) 2013, 2014, 2019, 2021 ++ * Copyright (c) 2013, 2014, 2019, 2021, 2022, 2023 + * Phillip Lougher <phillip@squashfs.org.uk> + * + * This program is free software; you can redistribute it and/or +@@ -42,6 +42,7 @@ + #include "mksquashfs_error.h" + #include "progressbar.h" + #include "caches-queues-lists.h" ++#include "signals.h" + + static int silent = 0; + static struct dir_ent *ent = NULL; +@@ -144,7 +145,6 @@ void dump_state() + void *info_thrd(void *arg) + { + sigset_t sigmask; +- struct timespec timespec = { .tv_sec = 1, .tv_nsec = 0 }; + int sig, waiting = 0; + + sigemptyset(&sigmask); +@@ -152,26 +152,7 @@ void *info_thrd(void *arg) + sigaddset(&sigmask, SIGHUP); + + while(1) { +- if(waiting) +- sig = sigtimedwait(&sigmask, NULL, ×pec); +- else +- sig = sigwaitinfo(&sigmask, NULL); +- +- if(sig == -1) { +- switch(errno) { +- case EAGAIN: +- /* interval timed out */ +- waiting = 0; +- /* FALLTHROUGH */ +- case EINTR: +- /* if waiting, the wait will be longer, but +- that's OK */ +- continue; +- default: +- BAD_ERROR("sigtimedwait/sigwaitinfo failed " +- "because %s\n", strerror(errno)); +- } +- } ++ sig = wait_for_signal(&sigmask, &waiting); + + if(sig == SIGQUIT && !waiting) { + print_filename(); +--- /dev/null ++++ b/squashfs-tools/signals.h +@@ -0,0 +1,54 @@ ++#ifndef SIGNALS_H ++#define SIGNALS_H ++/* ++ * Create a squashfs filesystem. This is a highly compressed read only ++ * filesystem. ++ * ++ * Copyright (c) 2023 ++ * Phillip Lougher <phillip@squashfs.org.uk> ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * as published by the Free Software Foundation; either version 2, ++ * or (at your option) any later version. ++ * ++ * This program 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 General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. ++ * ++ * signals.h ++ */ ++ ++static inline int wait_for_signal(sigset_t *sigmask, int *waiting) ++{ ++ int sig; ++ ++#if defined(__APPLE__) && defined(__MACH__) ++ sigwait(sigmask, &sig); ++ *waiting = 0; ++#else ++ struct timespec timespec = { .tv_sec = 1, .tv_nsec = 0 }; ++ ++ while(1) { ++ if(*waiting) ++ sig = sigtimedwait(sigmask, NULL, ×pec); ++ else ++ sig = sigwaitinfo(sigmask, NULL); ++ ++ if(sig != -1) ++ break; ++ ++ if(errno == EAGAIN) ++ *waiting = 0; ++ else if(errno != EINTR) ++ BAD_ERROR("sigtimedwait/sigwaitinfo failed because %s\n", strerror(errno)); ++ } ++#endif ++ return sig; ++} ++#endif +--- a/squashfs-tools/unsquashfs_info.c ++++ b/squashfs-tools/unsquashfs_info.c +@@ -2,7 +2,7 @@ + * Create a squashfs filesystem. This is a highly compressed read only + * filesystem. + * +- * Copyright (c) 2013, 2021 ++ * Copyright (c) 2013, 2021, 2023 + * Phillip Lougher <phillip@squashfs.org.uk> + * + * This program is free software; you can redistribute it and/or +@@ -40,6 +40,7 @@ + #include "squashfs_fs.h" + #include "unsquashfs.h" + #include "unsquashfs_error.h" ++#include "signals.h" + + char *pathname = NULL; + +@@ -96,7 +97,6 @@ void dump_state() + void *info_thrd(void *arg) + { + sigset_t sigmask; +- struct timespec timespec = { .tv_sec = 1, .tv_nsec = 0 }; + int sig, waiting = 0; + + sigemptyset(&sigmask); +@@ -104,26 +104,7 @@ void *info_thrd(void *arg) + sigaddset(&sigmask, SIGHUP); + + while(1) { +- if(waiting) +- sig = sigtimedwait(&sigmask, NULL, ×pec); +- else +- sig = sigwaitinfo(&sigmask, NULL); +- +- if(sig == -1) { +- switch(errno) { +- case EAGAIN: +- /* interval timed out */ +- waiting = 0; +- /* FALLTHROUGH */ +- case EINTR: +- /* if waiting, the wait will be longer, but +- that's OK */ +- continue; +- default: +- BAD_ERROR("sigtimedwait/sigwaitinfo failed " +- "because %s\n", strerror(errno)); +- } +- } ++ sig = wait_for_signal(&sigmask, &waiting); + + if(sig == SIGQUIT && !waiting) { + if(pathname) |