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GAUTAM RAJU
031cd72e2a
Add support for parent death signal (pdeathSignal) to ensure child processes receive a signal when the parent process dies. This addresses the FIXME comment in Runc.execute(). ## Changes - Add pdeathSignal field to exec_command_attrs C struct - Implement prctl(PR_SET_PDEATHSIG) in child process handler (Linux only) - Expose pdeathSignal through Command.Attrs Swift API - Wire up pdeathSignal in Runc.execute() to remove FIXME ## Implementation Details The implementation uses Linux-specific prctl() to set the parent death signal, ensuring proper cleanup when parent processes terminate. The feature is conditionally compiled for Linux only, maintaining compatibility with other platforms.
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/*
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* Copyright © 2025 Apple Inc. and the Containerization project authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef exec_command_h
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#define exec_command_h
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#if defined(__linux__) || defined(__APPLE__)
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#include <sys/types.h>
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#include <unistd.h>
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struct exec_command_attrs {
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int setpgid;
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/// parent group id
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pid_t pgid;
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/// set the controlling terminal
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int setctty;
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/// controlling terminal fd
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int ctty;
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/// set the process as session leader
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int setsid;
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/// set the process user id
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uid_t uid;
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/// set the process group id
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gid_t gid;
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/// signal mask for the child process
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int mask;
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/// parent death signal (Linux only, 0 to disable)
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int pdeathSignal;
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};
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void exec_command_attrs_init(struct exec_command_attrs *attrs);
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/// spawn a new child process with the provided attrs
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int exec_command(pid_t *result, const char *executable, char *const argv[],
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char *const envp[], const int file_handles[],
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const int file_handle_count, const char *working_directory,
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struct exec_command_attrs *attrs);
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#endif /* defined(__linux__) || defined(__APPLE__) */
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#endif /* exec_command_h */
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