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if (unsetenv(CS *name) < 0) return FALSE; is prevent the compilation. gcc environment.c environment.c: In function `cleanup_environment': environment.c:54: warning: cast to pointer from integer of different size environment.c:54: void value not ignored as it ought to be and man unsetenv GETENV(3) BSD Programmer's Manual GETENV(3) NAME getenv, putenv, setenv, unsetenv - environment variable functions SYNOPSIS #include <stdlib.h> char * getenv(const char *name); int setenv(const char *name, const char *value, int overwrite); int putenv(const char *string); void unsetenv(const char *name); DESCRIPTION These functions set, unset and fetch environment variables from the host environment list. For compatibility with differing environment conven- tions, the given arguments name and value may be appended and prepended, respectively, with an equal sign ``=''. The getenv() function obtains the current value of the environment vari- able, name. If the variable name is not in the current environment, a null pointer is returned. The setenv() function inserts or resets the environment variable name in the current environment list. If the variable name does not exist in the list, it is inserted with the given value. If the variable does exist, the argument overwrite is tested; if overwrite is zero, the variable is not reset, otherwise it is reset to the given value. The putenv() function takes an argument of the form ``name=value'' and is equivalent to: setenv(name, value, 1); The unsetenv() function deletes all instances of the variable name point- ed to by name from the list. RETURN VALUES The functions setenv() and putenv() return zero if successful; otherwise the global variable errno is set to indicate the error and a -1 is re- turned. ERRORS [ENOMEM] The function setenv() or putenv() failed because they were un- able to allocate memory for the environment. SEE ALSO csh(1), sh(1), execve(2), environ(7) STANDARDS The getenv() function conforms to ANSI C X3.159-1989 (``ANSI C ''). -- Member - Liberal International This is doctor@@nl2k.ab.ca Ici doctor@@nl2k.ab.ca God,Queen and country!Never Satan President Republic!Beware AntiChrist rising! http://www.fullyfollow.me/rootnl2k Look at Psalms 14 and 53 on Atheism Manitoba and Saskatchewan! Save your provinces in April! Vote Liberal!! -- ## List details at https://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##