NAME

dlerror - get diagnostic information

 SYNOPSIS

#include <dlfcn.h>

char *dlerror(void);

 DESCRIPTION

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 dlerror() a second time, immediately following a prior invocation, will result in NULL being returned.

 RETURN VALUE

If successful, dlerror() returns a null-terminated character string. Otherwise, NULL is returned.

 ERRORS

No errors are defined.

 EXAMPLES

None.

 APPLICATION USAGE

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. Depending on the application environment with respect to asynchronous execution events, such as signals or other asynchronous computation sharing the address space, portable applications should use a critical section to retrieve the error pointer and buffer.

 FUTURE DIRECTIONS

None.

 SEE ALSO

dlclose(), dlopen(), dlsym().