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typedef struct envlist envlist_t;
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extern envlist_t *envlist_create(void);
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extern void envlist_free(envlist_t *);
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extern int envlist_setenv(envlist_t *, const char *);
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extern int envlist_unsetenv(envlist_t *, const char *);
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extern int envlist_parse_set(envlist_t *, const char *);
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extern int envlist_parse_unset(envlist_t *, const char *);
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extern char **envlist_to_environ(const envlist_t *, size_t *);
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#endif /* ENVLIST_H */