#include <stdlib.h> | |
char *getenv(const char *name); | |
/* Returns: pointer to value associated with name, NULL if not found */ | |
int putenv(char *str); | |
/* Returns: 0 if OK, nonzero on error */ | |
int setenv(const char *name, const char *value, int rewrite); | |
int unsetenv(const char *name); | |
/* Both return: 0 if OK, −1 on error */ |
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