mirror of
https://github.com/zebrajr/postgres.git
synced 2025-12-07 12:20:31 +01:00
2ff501590b
Also performed an initial run through of upgrading our Copyright date to extend to 2005 ... first run here was very simple ... change everything where: grep 1996-2004 && the word 'Copyright' ... scanned through the generated list with 'less' first, and after, to make sure that I only picked up the right entries ...
135 lines
2.6 KiB
C
135 lines
2.6 KiB
C
/*-------------------------------------------------------------------------
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*
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* linux.c
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* Dynamic Loader for Postgres for Linux, generated from those for
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* Ultrix.
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*
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* You need to install the dld library on your Linux system!
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*
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/port/dynloader/linux.c,v 1.30 2004/12/31 22:00:32 pgsql Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#ifdef HAVE_DLD_H
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#include <dld.h>
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#endif
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#include "dynloader.h"
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#include "miscadmin.h"
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#ifndef HAVE_DLOPEN
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void *
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pg_dlopen(char *filename)
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{
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#ifndef HAVE_DLD_H
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elog(ERROR, "dynamic load not supported");
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return NULL;
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#else
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static int dl_initialized = 0;
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/*
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* initializes the dynamic loader with the executable's pathname.
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* (only needs to do this the first time pg_dlopen is called.)
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*/
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if (!dl_initialized)
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{
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if (dld_init(dld_find_executable(my_exec_path)))
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return NULL;
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/*
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* if there are undefined symbols, we want dl to search from the
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* following libraries also.
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*/
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dl_initialized = 1;
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}
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/*
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* link the file, then check for undefined symbols!
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*/
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if (dld_link(filename))
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return NULL;
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/*
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* If undefined symbols: try to link with the C and math libraries!
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* This could be smarter, if the dynamic linker was able to handle
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* shared libs!
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*/
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if (dld_undefined_sym_count > 0)
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{
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if (dld_link("/usr/lib/libc.a"))
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{
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elog(WARNING, "could not link C library");
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return NULL;
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}
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if (dld_undefined_sym_count > 0)
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{
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if (dld_link("/usr/lib/libm.a"))
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{
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elog(WARNING, "could not link math library");
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return NULL;
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}
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if (dld_undefined_sym_count > 0)
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{
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int count = dld_undefined_sym_count;
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char **list = dld_list_undefined_sym();
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/* list the undefined symbols, if any */
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do
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{
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elog(WARNING, "\"%s\" is undefined", *list);
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list++;
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count--;
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} while (count > 0);
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dld_unlink_by_file(filename, 1);
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return NULL;
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}
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}
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}
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return (void *) strdup(filename);
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#endif
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}
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PGFunction
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pg_dlsym(void *handle, char *funcname)
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{
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#ifndef HAVE_DLD_H
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return NULL;
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#else
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return (PGFunction) dld_get_func((funcname));
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#endif
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}
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void
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pg_dlclose(void *handle)
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{
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#ifndef HAVE_DLD_H
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#else
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dld_unlink_by_file(handle, 1);
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free(handle);
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#endif
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}
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char *
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pg_dlerror(void)
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{
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#ifndef HAVE_DLD_H
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return "dynaloader unspported";
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#else
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return dld_strerror(dld_errno);
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#endif
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}
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#endif /* !HAVE_DLOPEN */
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