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Use the environment variable LD_LIBMAP_DISABLE to disable

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libmap.conf(5) functionality.
This commit is contained in:
Matthew N. Dodd 2003-05-31 14:45:11 +00:00
parent 15c3fb05e5
commit 4df60d1cac
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=115444
2 changed files with 11 additions and 3 deletions
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3
libexec/rtld-elf/rtld.1
View file

@ -83,6 +83,9 @@ recognizes a number of environment variables that can be used to modify
its behaviour as follows:
.Pp
.Bl -tag -width ".Ev LD_LIBRARY_PATH"
.It Ev LD_LIBMAP_DISABLE
If set disables the use of
.Xr libmap.conf 5 .
.It Ev LD_LIBRARY_PATH
A colon separated list of directories, overriding the default search path
for shared libraries.

11
libexec/rtld-elf/rtld.c
View file

@ -134,6 +134,7 @@ void r_debug_state(struct r_debug*, struct link_map*);
*/
static char *error_message; /* Message for dlerror(), or NULL */
struct r_debug r_debug; /* for GDB; */
static bool libmap_disable; /* Disable libmap */
static bool trust; /* False for setuid and setgid programs */
static char *ld_bind_now; /* Environment variable for immediate binding */
static char *ld_debug; /* Environment variable for debugging */
@ -263,6 +264,8 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp)
trust = geteuid() == getuid() && getegid() == getgid();
libmap_disable = getenv("LD_LIBMAP_DISABLE") != NULL;
ld_bind_now = getenv("LD_BIND_NOW");
if (trust) {
ld_debug = getenv("LD_DEBUG");
@ -339,7 +342,8 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp)
sym_zero.st_shndx = SHN_UNDEF;
#ifdef WITH_LIBMAP
lm_init();
if (!libmap_disable)
lm_init();
#endif
dbg("loading LD_PRELOAD libraries");
@ -795,7 +799,7 @@ find_library(const char *xname, const Obj_Entry *refobj)
}
#ifdef WITH_LIBMAP
if ((name = lm_find(refobj->path, xname)) == NULL)
if (libmap_disable || (name = lm_find(refobj->path, xname)) == NULL)
#endif
name = (char *)xname;
@ -1434,7 +1438,8 @@ rtld_exit(void)
objlist_call_fini(&list_fini);
/* No need to remove the items from the list, since we are exiting. */
#ifdef WITH_LIBMAP
lm_fini();
if (!libmap_disable)
lm_fini();
#endif
}