dlerror(3) [osf1 man page]

dlerror(3)						     Library Functions Manual							dlerror(3)

NAME

       dlerror - Get diagnostic information

SYNOPSIS

       #include <dlfcn.h>

       char *dlerror(void)

DESCRIPTION

       The dlerror function returns a null-terminated character string (with no trailing newline) that describes the last error that occurred from
       dynamic linking processing for a call to dlopen(), dlclose(), or dlsym().  If no dynamic linking errors have occurred since the last  invo-
       cation  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.

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 appli-
       cation 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.

RELATED INFORMATION

       dlclose(3), dlopen(3), dlsym(3).  delim off

																	dlerror(3)

DLERROR(3)						     Linux Programmer's Manual							DLERROR(3)

NAME

       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

       dladdr(3), dlinfo(3), dlopen(3), dlsym(3)

COLOPHON

       This page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

Linux								    2017-09-15								DLERROR(3)