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Add wrapper functions for dlopen() et al so that we can support

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statically compiling in the sudoers plugin but still allow other
plugins to be loaded.  The new --enable-static-sudoers configure
option will cause the sudoers plugin to be compiled statically into
the sudo binary.  This does not prevent other plugins from being
loaded as per sudo.conf.
This commit is contained in:
Todd C. Miller
2013-11-22 16:35:15 -07:00
parent 0fb17059a6
commit 12f3bdf60e
26 changed files with 579 additions and 369 deletions
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26
plugins/sudoers/sssd.c
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@@ -43,11 +43,6 @@
#ifdef TIME_WITH_SYS_TIME
# include <time.h>
#endif
#ifdef HAVE_DLOPEN
# include <dlfcn.h>
#else
# include "compat/dlfcn.h"
#endif
#include <ctype.h>
#include <pwd.h>
#include <grp.h>
@@ -58,6 +53,7 @@
#include "sudoers.h"
#include "parse.h"
#include "lbuf.h"
#include "sudo_dso.h"
#include "sudo_debug.h"
/* SSSD <--> SUDO interface - do not change */
@@ -250,14 +246,15 @@ static int sudo_sss_open(struct sudo_nss *nss)
handle = emalloc(sizeof(struct sudo_sss_handle));
/* Load symbols */
handle->ssslib = dlopen(path, RTLD_LAZY);
handle->ssslib = sudo_dso_load(path, SUDO_DSO_LAZY);
if (handle->ssslib == NULL) {
warningx(U_("unable to dlopen %s: %s"), path, dlerror());
warningx(U_("unable to load %s: %s"), path, sudo_dso_strerror());
warningx(U_("unable to initialize SSS source. Is SSSD installed on your machine?"));
debug_return_int(EFAULT);
}
handle->fn_send_recv = dlsym(handle->ssslib, "sss_sudo_send_recv");
handle->fn_send_recv =
sudo_dso_findsym(handle->ssslib, "sss_sudo_send_recv");
if (handle->fn_send_recv == NULL) {
warningx(U_("unable to find symbol \"%s\" in %s"), path,
"sss_sudo_send_recv");
@@ -265,28 +262,31 @@ static int sudo_sss_open(struct sudo_nss *nss)
}
handle->fn_send_recv_defaults =
dlsym(handle->ssslib, "sss_sudo_send_recv_defaults");
sudo_dso_findsym(handle->ssslib, "sss_sudo_send_recv_defaults");
if (handle->fn_send_recv_defaults == NULL) {
warningx(U_("unable to find symbol \"%s\" in %s"), path,
"sss_sudo_send_recv_defaults");
debug_return_int(EFAULT);
}
handle->fn_free_result = dlsym(handle->ssslib, "sss_sudo_free_result");
handle->fn_free_result =
sudo_dso_findsym(handle->ssslib, "sss_sudo_free_result");
if (handle->fn_free_result == NULL) {
warningx(U_("unable to find symbol \"%s\" in %s"), path,
"sss_sudo_free_result");
debug_return_int(EFAULT);
}
handle->fn_get_values = dlsym(handle->ssslib, "sss_sudo_get_values");
handle->fn_get_values =
sudo_dso_findsym(handle->ssslib, "sss_sudo_get_values");
if (handle->fn_get_values == NULL) {
warningx(U_("unable to find symbol \"%s\" in %s"), path,
"sss_sudo_get_values");
debug_return_int(EFAULT);
}
handle->fn_free_values = dlsym(handle->ssslib, "sss_sudo_free_values");
handle->fn_free_values =
sudo_dso_findsym(handle->ssslib, "sss_sudo_free_values");
if (handle->fn_free_values == NULL) {
warningx(U_("unable to find symbol \"%s\" in %s"), path,
"sss_sudo_free_values");
@@ -310,7 +310,7 @@ static int sudo_sss_close(struct sudo_nss *nss)
if (nss && nss->handle) {
handle = nss->handle;
dlclose(handle->ssslib);
sudo_dso_unload(handle->ssslib);
}
efree(nss->handle);