xdasd_exec.c File Reference

OpenXDAS script execution engine. More...

#include "xdasd_exec.h"
#include "xdasd_log.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>

Go to the source code of this file.

Defines
#define	INITIAL_BUFSZ_MULTIPLIER   2
#define	XDAS_FIELD_COUNT   33
#define	SHELL_ENVAR   "SHELL"
#define	DEFAULT_SHELL   "/bin/sh"
Functions
static char *	ex_substitute_vars (const char *script, const char **msgflds)
	Substitute values in for variable names.
static int	ex_exec_script (const char *script)
	Execute an extra-process command.
int	xdasd_exec (const char *script, const char **msgflds)
	Execute a shell script with variable expansion.

---

Detailed Description

OpenXDAS script execution engine.

Author:

John Calcote (jcalcote@novell.com)

Attention:

Please submit patches to http://openxdas.sourceforge.net

Definition in file xdasd_exec.c.

---

Define Documentation

#define DEFAULT_SHELL   "/bin/sh"

Referenced by ex_exec_script().

#define INITIAL_BUFSZ_MULTIPLIER   2

Definition at line 61 of file xdasd_exec.c.

Referenced by ex_substitute_vars().

#define SHELL_ENVAR   "SHELL"

Referenced by ex_exec_script().

#define XDAS_FIELD_COUNT   33

Definition at line 64 of file xdasd_exec.c.

Referenced by ex_substitute_vars(), mcache_put_msg(), mcache_read_record(), mcache_write_record(), tr_put(), and xdasd_parse_message().

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Function Documentation

static int ex_exec_script

(

const char *

script

)

[static]

Execute an extra-process command.

This routine spawns an extra-process shell, feeding it a shell script via standard handle redirection. That is, the child shell process reads a script from STDIN (piped from the parent process), and then terminates with the exit code from the script.

Parameters:

[in]

script

- the (possibly multi-line) script to be executed.

Returns:

The shell status code obtained by executing the script, or a -1 returned by system failure of some sort if the script could not be executed.

For internal use only.

Definition at line 151 of file xdasd_exec.c.

References bytes, DEFAULT_SHELL, SHELL_ENVAR, and xdasd_log().

Referenced by xdasd_exec().

static char* ex_substitute_vars	(	const char *	script,
		const char **	msgflds
	)			[static]

Substitute values in for variable names.

Parameters:

[in]	script	- the script text (possibly) containing variables.
[in]	msgflds	- The values to be substitued for variables in line.

Returns:

An allocated modified copy of line. Caller is responsible for releasing allocated memory.

For internal use only.

Definition at line 76 of file xdasd_exec.c.

References free, INITIAL_BUFSZ_MULTIPLIER, malloc, XDAS_FIELD_COUNT, and xdasd_log().

Referenced by xdasd_exec().