setenv.c File Reference

#include <dev/nvmem.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <memdebug.h>
#include <sys/environ.h>
#include <cfg/crt.h>

Include dependency graph for setenv.c:

Functions
int	setenv (const char *name, const char *value, int force)
	Remove an environment variable.
void	unsetenv (const char *name)
	Remove an environment variable.

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Function Documentation

int setenv	(	const char *	name,
		const char *	value,
		int	force
	)

Remove an environment variable.

Parameters:

name	Points to a string, which is the name of the variable.
value	Points to a string, which is the value of the variable.
force	If not zero, existing values will be updated.

Returns:

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

References _NUTENVIRONMENT::env_name, _NUTENVIRONMENT::env_next, _NUTENVIRONMENT::env_prev, _NUTENVIRONMENT::env_value, findenv(), free(), malloc(), memset(), NULL, nut_environ, strcmp(), and strdup().

Referenced by putenv().

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void unsetenv

(

const char *

name

)

Remove an environment variable.

Parameters:

name	Points to a string, which is the name of the variable to be removed.

Returns:

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

References ENOENT, _NUTENVIRONMENT::env_name, _NUTENVIRONMENT::env_next, _NUTENVIRONMENT::env_prev, _NUTENVIRONMENT::env_value, errno, findenv(), free(), NULL, and nut_environ.

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