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HP-UX 11i Version 3: February 2007

Technical documentation

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dlerror — get diagnostic information


cc [flag ... ] file ... -ldl [library] ...

#include <dlfcn.h> char *dlerror(void);


dlopen is one of a family of routines that give the user direct access to the dynamic linking facilities (using the -ldl option on the compiler or ld command line). dlerror returns a null-terminated character string (with no trailing newline) that describes the last error that occurred during dynamic linking processing. If no dynamic linking errors have occurred since the last invocation of dlerror, dlerror returns NULL. Thus, invoking dlerrora second time, immediately following a prior invocation, results in NULL being returned.


This routine is thread-safe.


The messages returned by dlerror may reside in a static buffer that is overwritten on each call to dlerror. Application code should not write to this buffer. Programs wishing to preserve an error message should make their own copies of that message.


dlclose(3C), dlopen(3C), dlsym(3C).

Texts and Tutorials:

HP-UX Linker and Libraries Online User Guide

(See the +help option)

HP-UX Linker and Libraries User's Guide

(See manuals(5) for ordering information)

Printable version
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