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46 .Nd kernel environment variable functions
84 function obtains the current value of the kernel environment variable
118 function inserts or resets the kernel environment variable
122 If the variable
131 function deletes the kernel environment variable
136 function is used to determine if a kernel environment variable exists.
137 It returns a non-zero value if the variable
148 functions look for a kernel environment variable
160 these function store the parsed value in the integer variable pointed to
190 function stores a copy of the kernel environment variable
196 If the variable does not exist,
198 If the variable exists,
207 function interprets the value of the kernel environment variable
214 If the environment variable exists and has a valid boolean value, then that
215 value will be copied to the variable pointed to by
217 If the environment variable exists but is not a boolean value, then a warning
229 function returns a pointer to an environment variable's value on success or
231 if the variable does not exist.
241 function returns zero if the specified environment variable does not exist and
261 if the specified environment variable exists and its value matches the desired