-/**/
+/*
+ * authbind.c - main invoker program
+ *
+ * authbind is Copyright (C) 1998 Ian Jackson
+ *
+ * This program is free software; 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, or (at your option)
+ * any later version.
+ *
+ * This program 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 program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
+#include <assert.h>
-#define LD_PRELOAD "LD_PRELOAD"
-#define AUTHBINDLIB "AUTHBIND_LIB"
-#define LIBAUTHBIND "/usr/lib/authbind/libauthbind.so.0"
+#include "authbind.h"
+
+static const char *rcsid="$Id$";
+
+static void printusage(FILE *f) {
+ if (fprintf(f,
+ "usage: authbind [<options>] <program> <arg> <arg> ...\n"
+ "options: --deep --depth <levels>\n"
+ "version: " MAJOR_VER "." MINOR_VER " %s\n",
+ rcsid) == EOF) { perror("printf usage"); exit(-1); }
+}
+
+static void usageerror(const char *msg) {
+ fprintf(stderr,"usage error: %s\n",msg);
+ printusage(stderr);
+ exit(-1);
+}
+
+static void mustsetenv(const char *var, const char *val) {
+ if (setenv(var,val,1)) { perror("authbind: setenv"); exit(-1); }
+}
int main(int argc, char *const *argv) {
const char *expreload, *authbindlib, *preload;
- char *newpreload;
+ char *newpreload, *ep;
+ char buf[50];
+ unsigned long depth;
- authbindlib= getenv(AUTHBINDLIB);
- if (!authbindlib) {
- if (setenv(AUTHBINDLIB,LIBAUTHBIND,0)) {
- perror("authbind: setenv " AUTHBINDLIB);
- exit(-1);
+ depth= 1;
+ while (argc>1 && argv[1][0]=='-') {
+ argc--; argv++;
+ if (!argv[0][1]) break;
+ if (!strcmp("--deep",argv[0])) { depth= 0; }
+ else if (!strcmp("--depth",argv[0])) {
+ if (argc<=1) usageerror("--depth requires a value");
+ argc--; argv++;
+ depth= strtoul(argv[0],&ep,10);
+ if (*ep || depth<=0 || depth>100) usageerror("--depth value is not valid");
+ } else if (!strcmp("--help",argv[0]) || !strcmp("--help",argv[0])) {
+ printusage(stdout);
+ exit(0);
}
+ }
+ if (argc<2) usageerror("need program name");
+
+ authbindlib= getenv(AUTHBINDLIB_VAR);
+ if (!authbindlib) {
authbindlib= LIBAUTHBIND;
+ mustsetenv(AUTHBINDLIB_VAR,authbindlib);
}
- if ((expreload= getenv(LD_PRELOAD))) {
+ if ((expreload= getenv(PRELOAD_VAR))) {
newpreload= malloc(strlen(expreload)+strlen(authbindlib)+2);
strcpy(newpreload,expreload);
strcat(newpreload,":");
} else {
preload= authbindlib;
}
- if (setenv(LD_PRELOAD,preload,1)) { perror("authbind: setenv"); exit(-1); }
+ mustsetenv(PRELOAD_VAR,preload);
+
+ if (depth > 1) {
+ sprintf(buf,"%ld",depth-1);
+ mustsetenv(AUTHBIND_LEVELS_VAR,buf);
+ } else if (depth == 0) {
+ mustsetenv(AUTHBIND_LEVELS_VAR,"y");
+ } else {
+ assert(depth==1);
+ }
execvp(argv[1],argv+1);
perror(argv[1]); exit(-1);