|
|
|
|
@ -1,133 +1,7 @@ |
|
|
|
|
/*-------------------------------------------------------------------------
|
|
|
|
|
/*
|
|
|
|
|
* src/backend/port/dynloader/linux.c |
|
|
|
|
* |
|
|
|
|
* linux.c |
|
|
|
|
* Dynamic Loader for Postgres for Linux, generated from those for |
|
|
|
|
* Ultrix. |
|
|
|
|
* Dummy file used for nothing at this point |
|
|
|
|
* |
|
|
|
|
* You need to install the dld library on your Linux system! |
|
|
|
|
* |
|
|
|
|
* Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group |
|
|
|
|
* Portions Copyright (c) 1994, Regents of the University of California |
|
|
|
|
* |
|
|
|
|
* |
|
|
|
|
* IDENTIFICATION |
|
|
|
|
* src/backend/port/dynloader/linux.c |
|
|
|
|
* |
|
|
|
|
*------------------------------------------------------------------------- |
|
|
|
|
* see linux.h |
|
|
|
|
*/ |
|
|
|
|
|
|
|
|
|
#include "postgres.h" |
|
|
|
|
|
|
|
|
|
#ifdef HAVE_DLD_H |
|
|
|
|
#include <dld.h> |
|
|
|
|
#endif |
|
|
|
|
|
|
|
|
|
#include "dynloader.h" |
|
|
|
|
#include "miscadmin.h" |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#ifndef HAVE_DLOPEN |
|
|
|
|
|
|
|
|
|
void * |
|
|
|
|
pg_dlopen(const char *filename) |
|
|
|
|
{ |
|
|
|
|
#ifndef HAVE_DLD_H |
|
|
|
|
elog(ERROR, "dynamic load not supported"); |
|
|
|
|
return NULL; |
|
|
|
|
#else |
|
|
|
|
static int dl_initialized = 0; |
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* initializes the dynamic loader with the executable's pathname. (only |
|
|
|
|
* needs to do this the first time pg_dlopen is called.) |
|
|
|
|
*/ |
|
|
|
|
if (!dl_initialized) |
|
|
|
|
{ |
|
|
|
|
if (dld_init(dld_find_executable(my_exec_path))) |
|
|
|
|
return NULL; |
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* if there are undefined symbols, we want dl to search from the |
|
|
|
|
* following libraries also. |
|
|
|
|
*/ |
|
|
|
|
dl_initialized = 1; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* link the file, then check for undefined symbols! |
|
|
|
|
*/ |
|
|
|
|
if (dld_link(filename)) |
|
|
|
|
return NULL; |
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If undefined symbols: try to link with the C and math libraries! This |
|
|
|
|
* could be smarter, if the dynamic linker was able to handle shared libs! |
|
|
|
|
*/ |
|
|
|
|
if (dld_undefined_sym_count > 0) |
|
|
|
|
{ |
|
|
|
|
if (dld_link("/usr/lib/libc.a")) |
|
|
|
|
{ |
|
|
|
|
elog(WARNING, "could not link C library"); |
|
|
|
|
return NULL; |
|
|
|
|
} |
|
|
|
|
if (dld_undefined_sym_count > 0) |
|
|
|
|
{ |
|
|
|
|
if (dld_link("/usr/lib/libm.a")) |
|
|
|
|
{ |
|
|
|
|
elog(WARNING, "could not link math library"); |
|
|
|
|
return NULL; |
|
|
|
|
} |
|
|
|
|
if (dld_undefined_sym_count > 0) |
|
|
|
|
{ |
|
|
|
|
int count = dld_undefined_sym_count; |
|
|
|
|
char **list = dld_list_undefined_sym(); |
|
|
|
|
|
|
|
|
|
/* list the undefined symbols, if any */ |
|
|
|
|
do |
|
|
|
|
{ |
|
|
|
|
elog(WARNING, "\"%s\" is undefined", *list); |
|
|
|
|
list++; |
|
|
|
|
count--; |
|
|
|
|
} while (count > 0); |
|
|
|
|
|
|
|
|
|
dld_unlink_by_file(filename, 1); |
|
|
|
|
return NULL; |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
return (void *) strdup(filename); |
|
|
|
|
#endif |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
PGFunction |
|
|
|
|
pg_dlsym(void *handle, const char *funcname) |
|
|
|
|
{ |
|
|
|
|
#ifndef HAVE_DLD_H |
|
|
|
|
return NULL; |
|
|
|
|
#else |
|
|
|
|
return (PGFunction) dld_get_func((funcname)); |
|
|
|
|
#endif |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
void |
|
|
|
|
pg_dlclose(void *handle) |
|
|
|
|
{ |
|
|
|
|
#ifndef HAVE_DLD_H |
|
|
|
|
#else |
|
|
|
|
dld_unlink_by_file(handle, 1); |
|
|
|
|
free(handle); |
|
|
|
|
#endif |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
char * |
|
|
|
|
pg_dlerror(void) |
|
|
|
|
{ |
|
|
|
|
#ifndef HAVE_DLD_H |
|
|
|
|
return "dynaloader unsupported"; |
|
|
|
|
#else |
|
|
|
|
return dld_strerror(dld_errno); |
|
|
|
|
#endif |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
#endif /* !HAVE_DLOPEN */ |
|
|
|
|
|
Peter Eisentraut
8 years ago