What does errno 78 (ENAMETOOLONG) in Solaris mean?

ENAMETOOLONG

Pathname length limit

ENAMETOOLONG is Solaris errno 78 (path name is too long). Solaris rejected a pathname or component that exceeded PATH_MAX or NAME_MAX.

Measure both the complete pathname and individual component lengths after all substitutions and symlink expansion. Shortening a display name is irrelevant if a generated directory component or resolved target is what exceeds the Solaris limit.

What to check

• Capture the exact interface, structure type, and ABI width used by the process.
• for path failures, record both full pathname length and individual component length.
• for representability failures, compare large-file, 32-bit, and 64-bit build modes.

References

• Oracle Solaris intro(2): error numbers
• illumos errno.h definitions
• POSIX errno.h