Resolve a pathname
#include <stdlib.h> char * realpath( const char * pathname, char * resolved_name );
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The realpath() function resolves all symbolic links, extra slash (/) characters and references to /./ and /../ in pathname, and copies the resulting absolute pathname into the memory referenced by resolved_name.
To determine the size of the buffer pointed to by resolved_name, call fpathconf() or pathconf() with an argument of _PC_PATH_MAX.
This function resolves both absolute and relative paths and returns the absolute pathname corresponding to pathname. All but the last component of pathname must exist when realpath() is called.
A pointer to resolved_name, or NULL if an error occurs, in which case resolved_name contains the pathname that caused the problem.
The realpath() function may fail and set the external variable errno to any of the errors specified for the library functions chdir(), close(), fchdir(), lstat(), open(), readlink() and getcwd().
POSIX 1003.1 XSI