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realpath(3) Library Functions Manual realpath(3) NAME realpath - Resolves pathname SYNOPSIS #include <stdlib.h> char *realpath( const char *file_name, char *resolved_name); STANDARDS Interfaces documented on this reference page conform to industry stan- dards as follows: realpath(): POSIX.1, XPG4-UNIX Refer to the standards(5) reference page for more information about in- dustry standards and associated tags. DESCRIPTION The realpath() function derives, from the file pointed to by file_name, an absolute pathname that names the same file, whose resolution does not involve ".", "..", or symbolic links. The generated pathname is stored, up to a maximum of PATH_MAX bytes, in the buffer pointed to by resolved_name. RETURN VALUES Upon successful completion, the realpath() function returns a pointer to the resolved name. Otherwise, realpath() returns a null pointer and sets errno to indicate the error, and the contents of the buffer pointed to by resolved_name are undefined. ERRORS If the realpath() function fails, errno may be set to one of the fol- lowing values: Read or search permission was denied for a component of file_name. Either the file_name or resolved_name argument is a null pointer. An error occurred while reading from the file system. Too many symbolic links were encountered in resolving path. The file_name argument is longer than PATH_MAX or a pathname component is longer than NAME_MAX. A component of file_name does not name an existing file or file_name points to an empty string. Insufficient storage space avail- able. A component of either path prefix is not a directory. RELATED INFORMATION Functions: getcwd(3), sysconf(3) Standards: standards(5) delim off realpath(3)