env - manage variables in the environment

NAME  SYNTAX  DESCRIPTION  SEE ALSO 

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NAME

env − manage variables in the environment

SYNTAX

#include "env.h"

char **environ;

char *env_put(char *NAME,char *value);
char *env_puts(char *NAME=value);
char *env_set(char *NAME=value);
char *env_unset(char *NAME);
char *env_get(char *NAME);
char *env_pick();
char *env_clear();

DESCRIPTION

The environment, environ, is a 0-terminated array of 0-terminated strings, called environment variables. Each environment variable is of the form NAME=value.

env_puts puts the string ´NAME=value´ into the environment.

env_put assigns the new enviromment variable NAME with value.

env_set assigns an existing environment variable NAME with value: ´NAME=value´.

env_unset unsets an existing environment variable given as NAME.

env_get returns the assigned value of the first variable whose name is NAME, or 0 if there is no such variable.

env_pick returns any variable in the environment, or 0 if the environment is empty.

env_clear clears the whole envionment.

SEE ALSO

environ(7)

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