dlerror — obtain error diagnostic for functions in the dlopen API
Synopsis
#include <dlfcn.h>
char *dlerror(void);
Link with -ldl.
Description
The dlerror() function returns a human-readable, null-terminated string describing the most recent error that occurred from a call to one of the functions in the dlopen API since the last call to dlerror(). The returned string does not include a trailing newline.
dlerror() returns NULL if no errors have occurred since initialization or since it was last called.
Versions
dlerror() is present in glibc 2.0 and later.
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
|---|---|---|
| dlerror() | Thread safety | MT-Safe |
Conforming to
POSIX.1-2001.
Notes
The message returned by dlerror() may reside in a statically allocated buffer that is overwritten by subsequent dlerror() calls.
History
This function is part of the dlopen API, derived from SunOS.
Example
See dlopen(3).
See Also
Colophon
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Referenced By
dladdr(3), dlinfo(3), dlopen(3), dlsym(3).