ns_execproc(3aolserv) [debian man page]

Ns_Exec(3aolserver)					   AOLserver Library Procedures 				       Ns_Exec(3aolserver)

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NAME

       Ns_ExecArgblk,  Ns_ExecArgv,  Ns_ExecProc,  Ns_ExecProcess,  Ns_Fork,  Ns_GetEnviron, Ns_WaitForProcess, Ns_WaitProcess, ns_fork - External
       process execution

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.   Simpli-
	      fies 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.

SEE ALSO

       nsd(1), info(n)

KEYWORDS

AOLserver								4.0						       Ns_Exec(3aolserver)

Check Out this Related Man Page

setpgid(2)							   System Calls 							setpgid(2)

NAME

       setpgid - set process group ID

SYNOPSIS

       #include <sys/types.h>
       #include <unistd.h>

       int setpgid(pid_t pid, pid_t pgid);

DESCRIPTION

       The setpgid() function sets the process group ID of the process with ID pid to pgid.

       If pgid is equal to pid, the process becomes a process group leader. See intro(2) for more information on session leaders and process group
       leaders.

       If pgid is not equal to pid, the process becomes a member of an existing process group.

       If pid is equal to 0, the process ID of the calling process is used. If pgid is equal to 0, the process specified by pid becomes a  process
       group leader.

RETURN VALUES

       Upon successful completion, 0 is returned. Otherwise, -1 is returned and errno is set to indicate the error.

ERRORS

       The setpgid() function will fail if:

       EACCES	       The  pid  argument  matches the process ID of a child process of the calling process and the child process has successfully
		       executed  one of the exec family of functions (see exec(2)).

       EINVAL	       The pgid argument is less than (pid_t) 0 or greater than or equal to PID_MAX, or the calling process has a controlling ter-
		       minal that does not support job control.

       EPERM	       The process indicated by the pid argument is a session leader.

       EPERM	       The  pid argument matches the process ID of a child process of the calling process and the child process is not in the same
		       session as the calling process.

       EPERM	       The pgid argument does not match the process ID of the process indicated by the pid argument, and there is no process  with
		       a process group ID that matches pgid in the same session as the calling process.

       ESRCH	       The pid argument does not match the process ID of the calling process or of a child process of the calling process.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Async-Signal-Safe 	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       intro(2), exec(2), exit(2), fork(2), getpid(2), getsid(2), attributes(5), standards(5)

SunOS 5.10							    28 Dec 1996 							setpgid(2)

Linux and UNIX Man Pages

ns_execproc(3aolserv) [debian man page]

Check Out this Related Man Page