DLERROR(3C) Standard C Library Functions DLERROR(3C)

NAME

dlerror - get diagnostic information

SYNOPSIS

#include <dlfcn.h>

char *dlerror(void);

DESCRIPTION

The dlerror() function returns a null-terminated character string that
describes the last error that occurred during dynamic linking processing.
The returned string contains no trailing newline. If no dynamic linking
errors have occurred since the last invocation of dlerror(), dlerror()
returns NULL. Thus, invoking dlerror() a second time, immediately
following a prior invocation, results in NULL being returned.

USAGE

The dlerror() function is one of a family of functions that give the user
direct access to the dynamic linking facilities. These facilities are
available to dynamically-linked processes only. See Linker and Libraries
Guide.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+

SEE ALSO

ld(1), dladdr(3C), dlclose(3C), dldump(3C), dlopen(3C), dlsym(3C),
attributes(7), standards(7)


Linker and Libraries Guide

NOTES

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

March 1, 2004 DLERROR(3C)