SYNOPSIS

#include "ns.h"

---

int
Ns_ExecArgblk(char *exec, char *dir, int fdin, int fdout,
char *args, Ns_Set *env)

---

int
Ns_ExecArgv(char *exec, char *dir, int fdin, int fdout,
char **argv, Ns_Set *env)

---

int
Ns_ExecProc(char *exec, char **argv)

---

int
Ns_ExecProcess(char *exec, char *dir, int fdin, int fdout,
char *args, Ns_Set *env)

---

int
Ns_Fork(void)

---

char
**Ns_GetEnviron(void)

---

int
Ns_WaitForProcess(int pid, int *statusPtr)

---

int
Ns_WaitProcess(int pid)

---

int
ns_fork(void)

---

DESCRIPTION

These functions handle fork and exec operations. See files: nsd/exec.c, nsd/tclenv.c and nsthread/fork.c.

Ns_ExecArgblk(exec, dir, fdin, fdout, args, env)

Executes a command in a child process. Return process id of child process exec'ing the command or -1 on failure. Provides extended error checking and error messages.

Ns_ExecArgv(exec, dir, fdin, fdout, argv, env)

Execute a command in a child process using fork(2) and execve(2), returns the process id of child process exec'ing the command or -1 on failure. The child sends an extended error message to the parent.

Ns_ExecProc(exec, argv)

Executes a command in a child process. Returns the process id of the child process exec'ing the command or -1 on failure. Simplifies call to Ns_ExecArgv.

Ns_ExecProcess(exec, dir, fdin, fdout, args, env)

Executes a command in a child process. Returns the process id of the child process exec'ing the command or -1 on failure. Calls Ns_ExecArgblk with same arguments.

Ns_Fork()

Posix style fork(), using fork1() on Solaris if needed. See fork(2) man page. Calls ns_fork.

Ns_GetEnviron()

Returns pointer to the environment vector.

Ns_WaitForProcess(pid, statusPtr)

Wait for child process. Returns NS_OK on success, or NS_ERROR on failure. *statusPtr is set to the exit code of the child process.

Ns_WaitProcess(pid)

Wait for child process. Calls Ns_WaitForProcess with NULL statusPtr. Returns NS_OK on success, or NS_ERROR on failure.

ns_fork()

Posix style fork(), using fork1() on Solaris if needed.

KEYWORDS