Staging
v0.5.1
v0.5.1
https://github.com/python/cpython
Revision f4d644f36ffb6cb11b34bfcf533c14cfaebf709a authored by Gregory P. Smith on 30 January 2018, 05:27:39 UTC, committed by GitHub on 30 January 2018, 05:27:39 UTC
Do not allow receiving a SIGINT to cause the subprocess module to trigger an immediate SIGKILL of the child process. SIGINT is normally sent to all child processes by the OS at the same time already as was the established normal behavior in 2.7 and 3.2. This behavior change was introduced during the fix to https://bugs.python.org/issue12494 and is generally surprising to command line tool users who expect other tools launched in child processes to get their own SIGINT and do their own cleanup. In Python 3.3-3.6 subprocess.call and subprocess.run would immediately SIGKILL the child process upon receiving a SIGINT (which raises a KeyboardInterrupt). We now give the child a small amount of time to exit gracefully before resorting to a SIGKILL. This is also the case for subprocess.Popen.__exit__ which would previously block indefinitely waiting for the child to die. This was hidden from many users by virtue of subprocess.call and subprocess.run sending the signal immediately. Behavior change: subprocess.Popen.__exit__ will not block indefinitely when the exiting exception is a KeyboardInterrupt. This is done for user friendliness as people expect their ^C to actually happen. This could cause occasional orphaned Popen objects when not using `call` or `run` with a child process that hasn't exited. Refactoring involved: The Popen.wait method deals with the KeyboardInterrupt second chance, existing platform specific internals have been renamed to _wait(). Also fixes comment typos.
1 parent 83e64c8
Tip revision: f4d644f36ffb6cb11b34bfcf533c14cfaebf709a authored by Gregory P. Smith on 30 January 2018, 05:27:39 UTC
bpo-25942: make subprocess more graceful on ^C (GH-5026)
bpo-25942: make subprocess more graceful on ^C (GH-5026)
Tip revision: f4d644f
makexp_aix
#!/bin/sh
#
# ===========================================================================
# FILE: makexp_aix
# TYPE: standalone executable
# SYSTEM: AIX 3.2.5 and AIX 4
#
# DESCRIPTION: This script creates an export list of ALL global symbols
# from a list of object or archive files.
#
# USAGE: makexp_aix <OutputFile> "<FirstLine>" <InputFile> ...
#
# where:
# <OutputFile> is the target export list filename.
# <FirstLine> is the path/file string to be appended
# after the "#!" symbols in the first line of the
# export file. Passing "" means deferred resolution.
# <InputFile> is an object (.o) or an archive file (.a).
#
# HISTORY:
# 3-Apr-1998 -- remove C++ entries of the form Class::method
# Vladimir Marangozov
#
# 1-Jul-1996 -- added header information
# Vladimir Marangozov
#
# 28-Jun-1996 -- initial code
# Vladimir Marangozov (Vladimir.Marangozov@imag.fr)
# ==========================================================================
# Variables
expFileName=$1
toAppendStr=$2
shift; shift;
inputFiles=$*
automsg="Generated automatically by makexp_aix"
notemsg="NOTE: lists _all_ global symbols defined in the above file(s)."
curwdir=`pwd`
# Create the export file and setup the header info
echo "#!"$toAppendStr > $expFileName
echo "*" >> $expFileName
echo "* $automsg (`date -u`)" >> $expFileName
echo "*" >> $expFileName
echo "* Base Directory: $curwdir" >> $expFileName
echo "* Input File(s) : $inputFiles" >> $expFileName
echo "*" >> $expFileName
echo "* $notemsg" >> $expFileName
echo "*" >> $expFileName
# Extract the symbol list using 'nm' which produces quite
# different output under AIX 4 than under AIX 3.2.5.
# The following handles both versions by using a common flagset.
# Here are some hidden tricks:
# 1. Use /usr/ccs/bin/nm. Relevant to AIX 3.2.5 which has
# another version under /usr/ucb/bin/nm.
# 2. Use the -B flag to have a standard BSD representation
# of the symbol list on both AIX 3.2.5 and AIX 4. The "-B"
# flag is missing in the AIX 3.2.5 online usage help of 'nm'.
# 3. Use the -x flag to have a hex representation of the symbol
# values. This fills the leading whitespaces on AIX 4,
# thus simplifying the sed statement.
# 4. Eliminate all entries except those with either "B", "D"
# or "T" key letters. We are interested only in the global
# (extern) BSS, DATA and TEXT symbols. With the same statement
# we eliminate object member lines relevant to AIX 4.
# 5. Eliminate entries containing a dot. We can have a dot only
# as a symbol prefix, but such symbols are undefined externs.
# 6. Eliminate everything including the key letter, so that we're
# left with just the symbol name.
# 7. Eliminate all entries containing two colons, like Class::method
#
# Use -X32_64 if it appears to be implemented in this version of 'nm'.
NM=/usr/ccs/bin/nm
xopt=-X32_64
$NM -e $xopt $1 >/dev/null 2>&1 || xopt=""
$NM -Bex $xopt $inputFiles \
| sed -e '/ [^BDT] /d' -e '/\./d' -e 's/.* [BDT] //' -e '/::/d' \
| sort | uniq >> $expFileName
Computing file changes ...
