Merge pull request #533 from xushiwei/q

library os: StartProcess/Wait/Sysctl/environ; syscall.Wait4; c/syscall: zerrors; c/os: Setrlimit/Getrlimit;

Author: xushiwei

README.md

@@ -215,6 +215,7 @@ The currently supported libraries include:
 * [c/clang](https://pkg.go.dev/github.com/goplus/llgo/c/clang)
 * [c/llama2](https://pkg.go.dev/github.com/goplus/llgo/c/llama2)
 * [c/lua](https://pkg.go.dev/github.com/goplus/llgo/c/lua)
+* [c/neco](https://pkg.go.dev/github.com/goplus/llgo/c/neco)
 * [c/raylib](https://pkg.go.dev/github.com/goplus/llgo/c/raylib)
 * [c/sqlite](https://pkg.go.dev/github.com/goplus/llgo/c/sqlite)
 * [c/zlib](https://pkg.go.dev/github.com/goplus/llgo/c/zlib)

_cmptest/osproc/exec.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"runtime"
+)
+
+func main() {
+	ls := "ls"
+	args := []string{ls, "-l"}
+	if runtime.GOOS == "windows" {
+		ls = "dir"
+		args = []string{ls}
+	}
+	lspath, _ := exec.LookPath(ls)
+	if lspath != "" {
+		ls = lspath
+	}
+	proc, err := os.StartProcess(ls, args, &os.ProcAttr{
+		Files: []*os.File{nil, os.Stdout, os.Stderr},
+	})
+	if err != nil {
+		fmt.Println("os.StartProcess error:", err)
+		return
+	}
+	proc.Wait()
+	fmt.Println("proc.Wait done")
+}

c/os/os.go

@@ -263,20 +263,49 @@ func Execve(path *c.Char, argv **c.Char, envp **c.Char) c.Int
 //go:linkname Execvp C.execvp
 func Execvp(file *c.Char, argv **c.Char) c.Int
 
-//go:linkname Fork C.fork
-func Fork() c.Int
+// -----------------------------------------------------------------------------
 
-//go:linkname Kill C.kill
-func Kill(pid c.Int, sig c.Int) c.Int
+type PidT c.Int
 
-//go:linkname Exit C.exit
-func Exit(c.Int)
+//go:linkname Fork C.fork
+func Fork() PidT
 
 //go:linkname Getpid C.getpid
-func Getpid() c.Int
+func Getpid() PidT
 
 //go:linkname Getppid C.getppid
-func Getppid() c.Int
+func Getppid() PidT
+
+//go:linkname Kill C.kill
+func Kill(pid PidT, sig c.Int) c.Int
+
+// If wait() returns due to a stopped or terminated child process, the process ID
+// of the child is returned to the calling process.  Otherwise, a value of -1 is
+// returned and errno is set to indicate the error.
+//
+//go:linkname Wait C.wait
+func Wait(statLoc *c.Int) PidT
+
+// If wait3(), wait4(), or waitpid() returns due to a stopped or terminated child
+// process, the process ID of the child is returned to the calling process.  If
+// there are no children not previously awaited, -1 is returned with errno set to
+// [ECHILD].  Otherwise, if WNOHANG is specified and there are no stopped or exited
+// children, 0 is returned.  If an error is detected or a caught signal aborts the
+// call, a value of -1 is returned and errno is set to indicate the error.
+//
+//go:linkname Wait3 C.wait3
+func Wait3(statLoc *c.Int, options c.Int, rusage *syscall.Rusage) PidT
+
+//go:linkname Wait4 C.wait4
+func Wait4(pid PidT, statLoc *c.Int, options c.Int, rusage *syscall.Rusage) PidT
+
+//go:linkname Waitpid C.waitpid
+func Waitpid(pid PidT, statLoc *c.Int, options c.Int) PidT
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Exit C.exit
+func Exit(c.Int)
 
 //go:linkname Getuid C.getuid
 func Getuid() UidT
@@ -291,3 +320,43 @@ func Getgid() GidT
 func Getegid() GidT
 
 // -----------------------------------------------------------------------------
+
+//go:linkname Getrlimit C.getrlimit
+func Getrlimit(resource c.Int, rlp *syscall.Rlimit) c.Int
+
+//go:linkname Setrlimit C.setrlimit
+func Setrlimit(resource c.Int, rlp *syscall.Rlimit) c.Int
+
+// -----------------------------------------------------------------------------
+
+// Upon successful completion, the value 0 is returned; otherwise the value -1
+// is returned and the global variable errno is set to indicate the error.
+//
+//go:linkname Sysctl C.sysctl
+func Sysctl(
+	name *c.Int, namelen c.Uint,
+	oldp c.Pointer, oldlenp *uintptr,
+	newp c.Pointer, newlen uintptr) c.Int
+
+//go:linkname Sysctlbyname C.sysctlbyname
+func Sysctlbyname(
+	name *c.Char, oldp c.Pointer, oldlenp *uintptr,
+	newp c.Pointer, newlen uintptr) c.Int
+
+// The sysctlnametomib() function accepts an ASCII representation  of  the
+// name,  looks up the integer name	vector,	and returns the	numeric	repre-
+// sentation in the	mib array pointed to by	mibp.  The number of  elements
+// in the mib array	is given by the	location specified by sizep before the
+// call, and that location gives the number	of entries copied after	a suc-
+// cessful	call.	The  resulting	mib and	size may be used in subsequent
+// sysctl()	calls to get the data  associated  with	 the  requested	 ASCII
+// name.   This interface is intended for use by applications that want to
+// repeatedly request the same variable (the  sysctl()  function  runs  in
+// about  a	third the time as the same request made	via the	sysctlbyname()
+// function).  The sysctlnametomib() function is also useful for  fetching
+// mib  prefixes and then adding a final component.
+//
+//go:linkname Sysctlnametomib C.sysctlnametomib
+func Sysctlnametomib(name *c.Char, mibp *c.Int, sizep *uintptr) c.Int
+
+// -----------------------------------------------------------------------------

c/syscall/syscall.go

@@ -19,3 +19,9 @@ package syscall
 const (
 	LLGoPackage = "decl"
 )
+
+type Errno = uintptr
+
+// A Signal is a number describing a process signal.
+// It implements the os.Signal interface.
+type Signal = int