upstream/mercurial-mirror Files · contrib/packagelib.sh

osutil: add a function to unblock signals...

osutil: add a function to unblock signals Signals could be blocked by something like: #include <unistd.h> #include <signal.h> int main(int argc, char * const argv[]) { sigset_t set; sigfillset(&set); sigprocmask(SIG_BLOCK, &set, NULL); execv("/bin/hg", argv); return 0; } One of the problems is if SIGCHLD is blocked, chgserver would not reap zombie workers since it depends on SIGCHLD handler entirely. While it's the parent process to blame but it seems a good idea to just unblock the signal from hg. FWIW git does that for SIGPIPE already [1]. Unfortunately Python 2 does not reset or provide APIs to change signal masks. Therefore let's add one in osutil. Note: Python 3.3 introduced `signal.pthread_sigmask` which solves the problem. `sigprocmask` is part of POSIX [2] so there is no feature testing in `setup.py`. [1]: https://github.com/git/git/commit/7559a1be8a0afb10df41d25e4cf4c5285a5faef1 [2]: http://pubs.opengroup.org/onlinepubs/7908799/xsh/sigprocmask.html Differential Revision: https://phab.mercurial-scm.org/D1736

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      # Extract version number into 4 parts, some of which may be empty:

      #

      # version: the numeric part of the most recent tag. Will always look like 1.3.

      #

      # type: if an rc build, "rc", otherwise empty

      #

      # distance: the distance from the nearest tag, or empty if built from a tag

      #

      # node: the node|short hg was built from, or empty if built from a tag

      gethgversion() {

          export HGRCPATH=

          export HGPLAIN=

          make cleanbutpackages

          make local PURE=--pure

          HG="$PWD/hg"

          "$HG" version > /dev/null || { echo 'abort: hg version failed!'; exit 1 ; }

          hgversion=`LANGUAGE=C "$HG" version | sed -ne 's/.*(version \(.*\))$/\1/p'`

          if echo $hgversion | grep + > /dev/null 2>&1 ; then

              tmp=`echo $hgversion | cut -d+ -f 2`

              hgversion=`echo $hgversion | cut -d+ -f 1`

              distance=`echo $tmp | cut -d- -f 1`

              node=`echo $tmp | cut -d- -f 2`

          else

              distance=''

              node=''

          fi

          if echo $hgversion | grep -- '-' > /dev/null 2>&1; then

              version=`echo $hgversion | cut -d- -f1`

              type=`echo $hgversion | cut -d- -f2`

          else

              version=$hgversion

              type=''

          fi

      }

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				# Extract version number into 4 parts, some of which may be empty:
				#
				# version: the numeric part of the most recent tag. Will always look like 1.3.
				#
				# type: if an rc build, "rc", otherwise empty
				#
				# distance: the distance from the nearest tag, or empty if built from a tag
				#
				# node: the node\|short hg was built from, or empty if built from a tag
				gethgversion() {
				export HGRCPATH=
				export HGPLAIN=

				make cleanbutpackages
				make local PURE=--pure
				HG="$PWD/hg"

				"$HG" version > /dev/null \|\| { echo 'abort: hg version failed!'; exit 1 ; }

				hgversion=`LANGUAGE=C "$HG" version \| sed -ne 's/.(version \(.\))$/\1/p'`

				if echo $hgversion \| grep + > /dev/null 2>&1 ; then
				tmp=`echo $hgversion \| cut -d+ -f 2`
				hgversion=`echo $hgversion \| cut -d+ -f 1`
				distance=`echo $tmp \| cut -d- -f 1`
				node=`echo $tmp \| cut -d- -f 2`
				else
				distance=''
				node=''
				fi
				if echo $hgversion \| grep -- '-' > /dev/null 2>&1; then
				version=`echo $hgversion \| cut -d- -f1`
				type=`echo $hgversion \| cut -d- -f2`
				else
				version=$hgversion
				type=''
				fi
				}