[libc-commits] [libc] [libc][POSIX][unistd] implement getsid (PR #127341)
via libc-commits
libc-commits at lists.llvm.org
Sat Feb 15 10:57:16 PST 2025
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-libc
Author: Zaky Hermawan (ZakyHermawan)
<details>
<summary>Changes</summary>
Fixes https://github.com/llvm/llvm-project/issues/126603
---
Full diff: https://github.com/llvm/llvm-project/pull/127341.diff
10 Files Affected:
- (modified) libc/config/linux/aarch64/entrypoints.txt (+1)
- (modified) libc/config/linux/riscv/entrypoints.txt (+1)
- (modified) libc/config/linux/x86_64/entrypoints.txt (+1)
- (modified) libc/include/unistd.yaml (+6)
- (modified) libc/src/unistd/CMakeLists.txt (+7)
- (added) libc/src/unistd/getsid.h (+21)
- (modified) libc/src/unistd/linux/CMakeLists.txt (+15)
- (added) libc/src/unistd/linux/getsid.cpp (+29)
- (modified) libc/test/src/unistd/CMakeLists.txt (+10)
- (added) libc/test/src/unistd/getsid_test.cpp (+16)
``````````diff
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index efb5e1c7bd698..aac4017a0d845 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -329,6 +329,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.unistd.geteuid
libc.src.unistd.getpid
libc.src.unistd.getppid
+ libc.src.unistd.getsid
libc.src.unistd.gettid
libc.src.unistd.getuid
libc.src.unistd.isatty
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index a9ba0c257755b..6b006f0ecca89 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -326,6 +326,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.unistd.geteuid
libc.src.unistd.getpid
libc.src.unistd.getppid
+ libc.src.unistd.getsid
libc.src.unistd.gettid
libc.src.unistd.getuid
libc.src.unistd.isatty
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index a4f6671a59789..35661004663c9 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -328,6 +328,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.unistd.geteuid
libc.src.unistd.getpid
libc.src.unistd.getppid
+ libc.src.unistd.getsid
libc.src.unistd.gettid
libc.src.unistd.getuid
libc.src.unistd.isatty
diff --git a/libc/include/unistd.yaml b/libc/include/unistd.yaml
index d04d46bd5c002..051e92b006741 100644
--- a/libc/include/unistd.yaml
+++ b/libc/include/unistd.yaml
@@ -161,6 +161,12 @@ functions:
return_type: int
arguments:
- type: void
+ - name: getsid
+ standards:
+ - POSIX
+ return_type: pid_t
+ arguments:
+ - type: pid_t
- name: gettid
standards:
- Linux
diff --git a/libc/src/unistd/CMakeLists.txt b/libc/src/unistd/CMakeLists.txt
index fb563ec4ecfd9..b1a1716aa85c6 100644
--- a/libc/src/unistd/CMakeLists.txt
+++ b/libc/src/unistd/CMakeLists.txt
@@ -125,6 +125,13 @@ add_entrypoint_object(
.${LIBC_TARGET_OS}.getppid
)
+add_entrypoint_object(
+ getsid
+ ALIAS
+ DEPENDS
+ .${LIBC_TARGET_OS}.getsid
+)
+
add_entrypoint_object(
geteuid
ALIAS
diff --git a/libc/src/unistd/getsid.h b/libc/src/unistd/getsid.h
new file mode 100644
index 0000000000000..e788b5dc4fba0
--- /dev/null
+++ b/libc/src/unistd/getsid.h
@@ -0,0 +1,21 @@
+//===-- Implementation header for getsid ------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_UNISTD_GETSID_H
+#define LLVM_LIBC_SRC_UNISTD_GETSID_H
+
+#include "hdr/types/pid_t.h"
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+pid_t getsid(pid_t);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_UNISTD_GETSID_H
diff --git a/libc/src/unistd/linux/CMakeLists.txt b/libc/src/unistd/linux/CMakeLists.txt
index afdc595d0b26f..9502e2aa60b34 100644
--- a/libc/src/unistd/linux/CMakeLists.txt
+++ b/libc/src/unistd/linux/CMakeLists.txt
@@ -235,6 +235,21 @@ add_entrypoint_object(
libc.src.__support.OSUtil.osutil
)
+add_entrypoint_object(
+ getsid
+ SRCS
+ getsid.cpp
+ HDRS
+ ../getsid.h
+ DEPENDS
+ libc.hdr.types.pid_t
+ libc.hdr.fcntl_macros
+ libc.include.unistd
+ libc.include.sys_syscall
+ libc.src.__support.OSUtil.osutil
+ libc.src.errno.errno
+)
+
add_entrypoint_object(
getuid
SRCS
diff --git a/libc/src/unistd/linux/getsid.cpp b/libc/src/unistd/linux/getsid.cpp
new file mode 100644
index 0000000000000..5977c5bf10e94
--- /dev/null
+++ b/libc/src/unistd/linux/getsid.cpp
@@ -0,0 +1,29 @@
+//===-- Linux implementation of getsid-------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/unistd/getsid.h"
+
+#include "hdr/types/pid_t.h"
+#include "src/__support/OSUtil/syscall.h" // For internal syscall function.
+#include "src/__support/common.h"
+#include "src/__support/macros/config.h"
+#include "src/errno/libc_errno.h"
+#include <sys/syscall.h> // For syscall numbers.
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(pid_t, getsid, (pid_t pid)) {
+ pid_t ret = LIBC_NAMESPACE::syscall_impl<pid_t>(SYS_getsid, pid);
+ if (ret < 0) {
+ libc_errno = static_cast<int>(-ret);
+ return -1;
+ }
+ return ret;
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/test/src/unistd/CMakeLists.txt b/libc/test/src/unistd/CMakeLists.txt
index 665cb367ba4fd..d1f3050e6cccf 100644
--- a/libc/test/src/unistd/CMakeLists.txt
+++ b/libc/test/src/unistd/CMakeLists.txt
@@ -394,6 +394,16 @@ add_libc_unittest(
libc.src.unistd.getppid
)
+add_libc_unittest(
+ getsid_test
+ SUITE
+ libc_unistd_unittests
+ SRCS
+ getsid_test.cpp
+ DEPENDS
+ libc.src.unistd.getsid
+)
+
add_libc_unittest(
getuid_test
SUITE
diff --git a/libc/test/src/unistd/getsid_test.cpp b/libc/test/src/unistd/getsid_test.cpp
new file mode 100644
index 0000000000000..79f9e9fd8c87b
--- /dev/null
+++ b/libc/test/src/unistd/getsid_test.cpp
@@ -0,0 +1,16 @@
+//===-- Unittests for setsid ----------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/unistd/getsid.h"
+#include "test/UnitTest/Test.h"
+
+TEST(LlvmLibcGetPidTest, GetCurrSID) {
+ pid_t sid = LIBC_NAMESPACE::getsid(0);
+ ASSERT_NE(sid, -1);
+ ASSERT_ERRNO_SUCCESS();
+}
``````````
</details>
https://github.com/llvm/llvm-project/pull/127341
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