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'\" $Header: /cvsroot/aolserver/aolserver/doc/Ns_Exec.3,v 1.5 2003/04/10 22:00:40 shmooved Exp $
'\"
'\"
.so man.macros
.TH Ns_Exec 3 4.0 AOLserver "AOLserver Library Procedures"
.BS
'\" Note: do not modify the .SH NAME line immediately below!
.SH NAME
Ns_ExecArgblk, Ns_ExecArgv, Ns_ExecProc, Ns_ExecProcess, Ns_Fork, Ns_GetEnviron,
Ns_WaitForProcess, Ns_WaitProcess, ns_fork \- External process execution
.SH SYNOPSIS
.nf
\fB#include "ns.h"\fR
.sp
int
\fBNs_ExecArgblk\fR(\fIchar *exec, char *dir, int fdin, int fdout,
char *args, Ns_Set *env\fR)
.sp
int
\fBNs_ExecArgv\fR(\fIchar *exec, char *dir, int fdin, int fdout,
char **argv, Ns_Set *env\fR)
.sp
int
\fBNs_ExecProc\fR(\fIchar *exec, char **argv\fR)
.sp
int
\fBNs_ExecProcess\fR(\fIchar *exec, char *dir, int fdin, int fdout,
char *args, Ns_Set *env\fR)
.sp
int
\fBNs_Fork\fR(\fIvoid\fR)
.sp
char
\fB**Ns_GetEnviron\fR(\fIvoid\fR)
.sp
int
\fBNs_WaitForProcess\fR(\fIint pid, int *statusPtr\fR)
.sp
int
\fBNs_WaitProcess\fR(\fIint pid\fR)
.sp
int
\fBns_fork\fR(\fIvoid\fR)
.BE
.SH DESCRIPTION
.PP
These functions handle fork and exec operations. See files:
nsd/exec.c, nsd/tclenv.c and nsthread/fork.c.
.TP
\fBNs_ExecArgblk\fR(\fIexec, dir, fdin, fdout, args, env\fR)
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.
.TP
\fBNs_ExecArgv\fR(\fIexec, dir, fdin, fdout, argv, env\fR)
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.
.TP
\fBNs_ExecProc\fR(\fIexec, argv\fR)
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.
.TP
\fBNs_ExecProcess\fR(\fIexec, dir, fdin, fdout, args, env\fR)
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.
.TP
\fBNs_Fork\fR(\fI\fR)
Posix style fork(), using fork1() on Solaris if needed. See
fork\(2\) man page. Calls ns_fork.
.TP
\fBNs_GetEnviron\fR(\fI\fR)
Returns pointer to the environment vector.
.TP
\fBNs_WaitForProcess\fR(\fIpid, statusPtr\fR)
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.
.TP
\fBNs_WaitProcess\fR(\fIpid\fR)
Wait for child process. Calls Ns_WaitForProcess with NULL
statusPtr. Returns NS_OK on success, or NS_ERROR on failure.
.TP
\fBns_fork\fR(\fI\fR)
Posix style fork(), using fork1() on Solaris if needed.
.SH "SEE ALSO"
nsd(1), info(n)
.SH KEYWORDS
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