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getenv(3) -- Linux man page
NAME
getenv - get an environment variable
SYNOPSIS
#include <stdlib.h>
char *getenv(const char *name);
DESCRIPTION
The getenv() function searches the environment list for a string
that matches the string pointed to by name. The strings are of
the form name = value.
RETURN VALUE
The getenv() function returns a pointer to the value in the
environment, or NULL if there is no match.
CONFORMING TO
SVID 3, POSIX, BSD 4.3, ISO 9899
SEE ALSO
putenv(3),
setenv(3),
clearenv(3),
unsetenv(3),
environ(5)
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