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getenv(3C) Standard C Library Functions getenv(3C) NAME getenv - return value for environment name SYNOPSIS #include <stdlib.h> char *getenv(const char *name); DESCRIPTION The getenv() function searches the environment list (see environ(5)) for a string of the form name=value and, if the string is present, re- turns a pointer to the value in the current environment. RETURN VALUES If successful, getenv() returns a pointer to the value in the current environment; otherwise, it returns a null pointer. USAGE The getenv() function can be safely called from a multithreaded appli- cation. Care must be exercised when using both getenv() and putenv(3C) in a multithreaded application. These functions examine and modify the environment list, which is shared by all threads in an ap- plication. The system prevents the list from being accessed simultane- ously by two different threads. It does not, however, prevent two threads from successively accessing the environment list using getenv() or putenv(3C). ATTRIBUTES See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Safe | +-----------------------------+-----------------------------+ SEE ALSO exec(2), putenv(3C), attributes(5), environ(5), standards(5) SunOS 5.10 24 Jul 2002 getenv(3C)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | USAGE | ATTRIBUTES | SEE ALSO
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