osdEnv.c File Reference

#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include "epicsStdio.h"
#include "errlog.h"
#include "cantProceed.h"
#include "envDefs.h"
#include "osiUnistd.h"
#include "epicsFindSymbol.h"
#include "iocsh.h"

Include dependency graph for osdEnv.c:

Go to the source code of this file.

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...

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 34 of file osdEnv.c.

{
    char *cp;

    iocshEnvClear(name);

    cp = mallocMustSucceed (strlen (name) + strlen (value) + 2, "epicsEnvSet");
    strcpy (cp, name);
    strcat (cp, "=");
    strcat (cp, value);
    if (putenv (cp) < 0) {
        errPrintf(
                -1L,
                __FILE__,
                __LINE__,
                "Failed to set environment parameter \"%s\" to \"%s\": %s\n",
                name,
                value,
                strerror (errno));
        free (cp);
    }
}

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 72 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 62 of file osdEnv.c.

{
    iocshEnvClear(name);
    if (getenv(name) != NULL)
        epicsEnvSet((char*)name, "");
}