osdEnv.c File Reference

#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <crt_externs.h>
#include "epicsStdio.h"
#include "envDefs.h"
#include "iocsh.h"

Include dependency graph for osdEnv.c:

Go to the source code of this file.

Macros
#define	environ   (*_NSGetEnviron())

Functions
LIBCOM_API void epicsStdCall	epicsEnvSet (const char *name, const char *value)
	Set an environment variable's value. More...
LIBCOM_API void epicsStdCall	epicsEnvUnset (const char *name)
	Clear the value of an environment variable. More...
LIBCOM_API void epicsStdCall	epicsEnvShow (const char *name)
	Print value of an environment variable, or all variables. More...

Macro Definition Documentation

#define environ   (*_NSGetEnviron())

Definition at line 26 of file osdEnv.c.

Function Documentation

LIBCOM_API void epicsStdCall epicsEnvSet	(	const char *	name,
		const char *	value
	)

Set an environment variable's value.

The setenv() routine is not available on all operating systems. This routine provides a portable alternative for all EPICS targets.

Parameters

name	Environment variable name.
value	New value for environment variable.

Definition at line 35 of file osdEnv.c.

{
    if (!name) return;
    iocshEnvClear(name);
    setenv(name, value, 1);
}

LIBCOM_API void epicsStdCall epicsEnvShow

(

const char *

name

)

Print value of an environment variable, or all variables.

Parameters

name	Environment variable name, or NULL to show all.

Definition at line 55 of file osdEnv.c.

{
    if (name == NULL) {
        extern char **environ;
        char **sp;

        for (sp = environ ; (sp != NULL) && (*sp != NULL) ; sp++)
            printf ("%s\n", *sp);
    }
    else {
        const char *cp = getenv (name);
        if (cp == NULL)
            printf ("%s is not an environment variable.\n", name);
        else
            printf ("%s=%s\n", name, cp);
    }
}

LIBCOM_API void epicsStdCall epicsEnvUnset

(

const char *

name

)

Clear the value of an environment variable.

Parameters

name	Environment variable name.

Definition at line 46 of file osdEnv.c.

{
    iocshEnvClear(name);
    unsetenv(name);
}