.\" Copyright 1995 Yggdrasil Computing, Incorporated. .\" and Copyright 2015 Michael Kerrisk .\" .\" %%%LICENSE_START(GPLv2+_DOC_FULL) .\" This is free documentation; you can redistribute it and/or .\" modify it under the terms of the GNU General Public License as .\" published by the Free Software Foundation; either version 2 of .\" the License, or (at your option) any later version. .\" .\" The GNU General Public License's references to "object code" .\" and "executables" are to be interpreted as the output of any .\" document formatting or typesetting system, including .\" intermediate and printed output. .\" .\" This manual is distributed in the hope that it will be useful, .\" but WITHOUT ANY WARRANTY; without even the implied warranty of .\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the .\" GNU General Public License for more details. .\" .\" You should have received a copy of the GNU General Public .\" License along with this manual; if not, see .\" . .\" %%%LICENSE_END .\" .TH DLERROR 3 2020-06-09 "Linux" "Linux Programmer's Manual" .SH NAME dlerror \- obtain error diagnostic for functions in the dlopen API .SH SYNOPSIS .B #include .PP .B "char *dlerror(void);" .PP Link with \fI\-ldl\fP. .SH DESCRIPTION The .BR 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 .BR dlerror (). The returned string does .I not include a trailing newline. .PP .BR dlerror () returns NULL if no errors have occurred since initialization or since it was last called. .SH VERSIONS .BR dlerror () is present in glibc 2.0 and later. .SH ATTRIBUTES For an explanation of the terms used in this section, see .BR attributes (7). .TS allbox; lb lb lb l l l. Interface Attribute Value T{ .BR dlerror () T} Thread safety MT-Safe .TE .SH CONFORMING TO POSIX.1-2001. .SH NOTES The message returned by .BR dlerror () may reside in a statically allocated buffer that is overwritten by subsequent .BR dlerror () calls. .\" .LP .\" The string returned by .\" .BR dlerror () .\" should not be modified. .\" Some systems give the prototype as .\" .sp .\" .in +5 .\" .B "const char *dlerror(void);" .\" .in .SS History This function is part of the dlopen API, derived from SunOS. .SH EXAMPLES See .BR dlopen (3). .SH SEE ALSO .BR dladdr (3), .BR dlinfo (3), .BR dlopen (3), .BR dlsym (3) .SH COLOPHON This page is part of release 5.10 of the Linux .I 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/.