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https://github.com/git-for-windows/git.git
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6b36678081
By default, CreateProcess() does not inherit any open file handles, unless the bInheritHandles parameter is set to TRUE. Which we do need to set because we need to pass in stdin/stdout/stderr to talk to the child processes. Sadly, this means that all file handles (unless marked via O_NOINHERIT) are inherited. This lead to problems in GVFS Git, where a long-running read-object hook is used to hydrate missing objects, and depending on the circumstances, might only be called *after* Git opened a file handle. Ideally, we would not open files without O_NOINHERIT unless *really* necessary (i.e. when we want to pass the opened file handle as standard handle into a child process), but apparently it is all-too-easy to introduce incorrect open() calls: this happened, and prevented updating a file after the read-object hook was started because the hook still held a handle on said file. Happily, there is a solution: as described in the "Old New Thing" https://blogs.msdn.microsoft.com/oldnewthing/20111216-00/?p=8873 there is a way, starting with Windows Vista, that lets us define precisely which handles should be inherited by the child process. And since we bumped the minimum Windows version for use with Git for Windows to Vista with v2.10.1 (i.e. a *long* time ago), we can use this method. So let's do exactly that. We need to make sure that the list of handles to inherit does not contain duplicates; Otherwise CreateProcessW() would fail with ERROR_INVALID_ARGUMENT. While at it, stop setting errno to ENOENT unless it really is the correct value. Also, fall back to not limiting handle inheritance under certain error conditions (e.g. on Windows 7, which is a lot stricter in what handles you can specify to limit to). Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
186 lines
4.4 KiB
Bash
Executable File
186 lines
4.4 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2009 Ilari Liusvaara
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#
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test_description='Test run command'
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. ./test-lib.sh
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cat >hello-script <<-EOF
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#!$SHELL_PATH
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cat hello-script
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EOF
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>empty
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test_expect_success MINGW 'subprocess inherits only std handles' '
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test-run-command inherited-handle
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'
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test_expect_success 'start_command reports ENOENT' '
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test-run-command start-command-ENOENT ./does-not-exist
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'
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test_expect_success 'run_command can run a command' '
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cat hello-script >hello.sh &&
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chmod +x hello.sh &&
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test-run-command run-command ./hello.sh >actual 2>err &&
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test_cmp hello-script actual &&
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test_cmp empty err
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'
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test_expect_success !MINGW 'run_command can run a script without a #! line' '
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cat >hello <<-\EOF &&
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cat hello-script
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EOF
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chmod +x hello &&
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test-run-command run-command ./hello >actual 2>err &&
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test_cmp hello-script actual &&
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test_cmp empty err
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'
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test_expect_success 'run_command does not try to execute a directory' '
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test_when_finished "rm -rf bin1 bin2" &&
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mkdir -p bin1/greet bin2 &&
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write_script bin2/greet <<-\EOF &&
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cat bin2/greet
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EOF
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PATH=$PWD/bin1$PATH_SEP$PWD/bin2$PATH_SEP$PATH \
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test-run-command run-command greet >actual 2>err &&
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test_cmp bin2/greet actual &&
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test_cmp empty err
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'
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test_expect_success POSIXPERM 'run_command passes over non-executable file' '
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test_when_finished "rm -rf bin1 bin2" &&
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mkdir -p bin1 bin2 &&
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write_script bin1/greet <<-\EOF &&
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cat bin1/greet
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EOF
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chmod -x bin1/greet &&
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write_script bin2/greet <<-\EOF &&
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cat bin2/greet
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EOF
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PATH=$PWD/bin1$PATH_SEP$PWD/bin2$PATH_SEP$PATH \
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test-run-command run-command greet >actual 2>err &&
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test_cmp bin2/greet actual &&
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test_cmp empty err
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'
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test_expect_success POSIXPERM 'run_command reports EACCES' '
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cat hello-script >hello.sh &&
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chmod -x hello.sh &&
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test_must_fail test-run-command run-command ./hello.sh 2>err &&
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grep "fatal: cannot exec.*hello.sh" err
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'
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test_expect_success POSIXPERM,SANITY 'unreadable directory in PATH' '
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mkdir local-command &&
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test_when_finished "chmod u+rwx local-command && rm -fr local-command" &&
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git config alias.nitfol "!echo frotz" &&
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chmod a-rx local-command &&
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(
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PATH=./local-command$PATH_SEP$PATH &&
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git nitfol >actual
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) &&
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echo frotz >expect &&
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test_cmp expect actual
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'
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cat >expect <<-EOF
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preloaded output of a child
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Hello
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World
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preloaded output of a child
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Hello
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World
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preloaded output of a child
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Hello
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World
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preloaded output of a child
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Hello
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World
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EOF
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test_expect_success 'run_command runs in parallel with more jobs available than tasks' '
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test-run-command run-command-parallel 5 sh -c "printf \"%s\n%s\n\" Hello World" 2>actual &&
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test_cmp expect actual
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'
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test_expect_success 'run_command runs in parallel with as many jobs as tasks' '
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test-run-command run-command-parallel 4 sh -c "printf \"%s\n%s\n\" Hello World" 2>actual &&
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test_cmp expect actual
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'
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test_expect_success 'run_command runs in parallel with more tasks than jobs available' '
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test-run-command run-command-parallel 3 sh -c "printf \"%s\n%s\n\" Hello World" 2>actual &&
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test_cmp expect actual
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'
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cat >expect <<-EOF
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preloaded output of a child
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asking for a quick stop
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preloaded output of a child
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asking for a quick stop
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preloaded output of a child
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asking for a quick stop
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EOF
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test_expect_success 'run_command is asked to abort gracefully' '
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test-run-command run-command-abort 3 false 2>actual &&
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test_cmp expect actual
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'
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cat >expect <<-EOF
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no further jobs available
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EOF
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test_expect_success 'run_command outputs ' '
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test-run-command run-command-no-jobs 3 sh -c "printf \"%s\n%s\n\" Hello World" 2>actual &&
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test_cmp expect actual
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'
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test_trace () {
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expect="$1"
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shift
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GIT_TRACE=1 test-run-command "$@" run-command true 2>&1 >/dev/null | \
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sed 's/.* run_command: //' >actual &&
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echo "$expect true" >expect &&
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test_cmp expect actual
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}
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test_expect_success 'GIT_TRACE with environment variables' '
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test_trace "abc=1 def=2" env abc=1 env def=2 &&
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test_trace "abc=2" env abc env abc=1 env abc=2 &&
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test_trace "abc=2" env abc env abc=2 &&
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(
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abc=1 && export abc &&
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test_trace "def=1" env abc=1 env def=1
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) &&
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(
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abc=1 && export abc &&
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test_trace "def=1" env abc env abc=1 env def=1
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) &&
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test_trace "def=1" env non-exist env def=1 &&
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test_trace "abc=2" env abc=1 env abc env abc=2 &&
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(
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abc=1 def=2 && export abc def &&
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test_trace "unset abc def;" env abc env def
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) &&
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(
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abc=1 def=2 && export abc def &&
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test_trace "unset def; abc=3" env abc env def env abc=3
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) &&
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(
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abc=1 && export abc &&
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test_trace "unset abc;" env abc=2 env abc
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)
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'
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test_done
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