2 files changed, 25 insertions, 2 deletions

diff --git a/config.mk b/config.mk
index 48eef1f..0333587 100644
--- a/config.mk
+++ b/config.mk
@@ -15,11 +15,14 @@ INCS = -I. -I/usr/include -I${X11INC}
 LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11
 
 # flags
-CFLAGS = -Os ${INCS} -DVERSION=\"${VERSION}\"
+CFLAGS = -Os ${INCS} -DVERSION=\"${VERSION}\" -DHAVE_SHADOW_H
 LDFLAGS = ${LIBS}
 #CFLAGS = -g -Wall -O2 ${INCS} -DVERSION=\"${VERSION}\"
 #LDFLAGS = -g ${LIBS}
 
+# On *BSD remove -DHAVE_SHADOW_H from CFLAGS
+# On OpenBSD remove -lcrypt from LIBS
+
 # compiler and linker
 CC = cc
 LD = ${CC}
diff --git a/slock.c b/slock.c
index 836de45..866400d 100644
--- a/slock.c
+++ b/slock.c
@@ -2,7 +2,13 @@
  * See LICENSE file for license details.
  */
 #define _XOPEN_SOURCE
+
+#if HAVE_SHADOW_H
 #include <shadow.h>
+#else
+#include <pwd.h>
+#endif
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
@@ -17,7 +23,11 @@ main(int argc, char **argv) {
         char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
         char buf[32], passwd[256];
         int num, prev_nitem, screen;
+#if HAVE_SHADOW_H
         struct spwd *sp;
+#else
+        struct passwd *pw;
+#endif
         unsigned int i, len;
         Bool running = True;
         Cursor invisible;
@@ -33,11 +43,17 @@ main(int argc, char **argv) {
                 fputs("slock-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
                 exit(EXIT_SUCCESS);
         }
-        if(!(sp = getspnam(getenv("USER")))) {
+        if(geteuid() != 0) {
                 fputs("slock: cannot retrieve password entry (make sure to suid slock)\n", stderr);
                 exit(EXIT_FAILURE);
         }
+#if HAVE_SHADOW_H
+        sp = getspnam(getenv("USER"));
         endspent();
+#else
+        pw = getpwuid(getuid());
+        endpwent();
+#endif
         if(!(dpy = XOpenDisplay(0))) {
                 fputs("slock: cannot open display\n", stderr);
                 exit(EXIT_FAILURE);
@@ -87,7 +103,11 @@ main(int argc, char **argv) {
                         }
                         switch(ksym) {
                         case XK_Return:
+#if HAVE_SHADOW_H
                                 if((running = strncmp(crypt(passwd, sp->sp_pwdp), sp->sp_pwdp, sizeof(passwd))))
+#else
+                                if((running = strncmp(crypt(passwd, pw->pw_passwd), pw->pw_passwd, sizeof(passwd))))
+#endif
                                         XBell(dpy, 100);
                                 passwd[0] = 0;
                                 break;