What does errno 78 (ENAMETOOLONG) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: Solaris rejected a pathname or component that exceeded PATH_MAX or NAME_MAX.

Could be also:
Constant	Type	OS
EREMCHG	errno	Linux
ENOSYS	errno	Mac
PFN_LIST_CORRUPT	BugCheck Code	Windows

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ENOSYS	ELIBACC

ENAMETOOLONG

Pathname length limit

On Solaris, ENAMETOOLONG is errno value 78. The base message is path name is too long, but the useful diagnostic context is narrower than the short message: Solaris rejected a pathname or component that exceeded PATH_MAX or NAME_MAX.

Use the Solaris-specific errno table first, then compare with POSIX only for portable behavior. Some Solaris values share names with other UNIX systems but have different numbers or more specific historical meanings.

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

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