Vendor-branch import of the 4.4BSD-Lite2 code for lpr. There are

several bugfixes in it that are worth considering.

Don't be alarmed about the import conflicts...

Obtained from: 4.4BSD-Lite2

1 files changed, 41 insertions, 4 deletions

diff --git a/usr.sbin/lpr/lpc/lpc.c b/usr.sbin/lpr/lpc/lpc.c
index 01cfc12..64432b2 100644
--- a/usr.sbin/lpr/lpc/lpc.c
+++ b/usr.sbin/lpr/lpc/lpc.c
@@ -39,7 +39,7 @@ static char copyright[] =
 #endif /* not lint */
 
 #ifndef lint
-static char sccsid[] = "@(#)lpc.c	8.1 (Berkeley) 6/6/93";
+static char sccsid[] = "@(#)lpc.c	8.3 (Berkeley) 4/28/95";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -53,10 +53,16 @@ static char sccsid[] = "@(#)lpc.c	8.1 (Berkeley) 6/6/93";
 #include <stdio.h>
 #include <ctype.h>
 #include <string.h>
+#include <grp.h>
+#include <sys/param.h>
 #include "lp.h"
 #include "lpc.h"
 #include "extern.h"
 
+#ifndef LPR_OPER
+#define LPR_OPER	"operator"	/* group name of lpr operators */
+#endif
+
 /*
  * lpc -- line printer control program
  */
@@ -74,6 +80,7 @@ static void		 cmdscanner __P((int));
 static struct cmd	*getcmd __P((char *));
 static void		 intr __P((int));
 static void		 makeargv __P((void));
+static int		 ingroup __P((char *));
 
 int
 main(argc, argv)
@@ -95,7 +102,7 @@ main(argc, argv)
 			printf("?Invalid command\n");
 			exit(1);
 		}
-		if (c->c_priv && getuid()) {
+		if (c->c_priv && getuid() && ingroup(LPR_OPER) == 0) {
 			printf("?Privileged command\n");
 			exit(1);
 		}
@@ -151,7 +158,7 @@ cmdscanner(top)
 			printf("?Invalid command\n");
 			continue;
 		}
-		if (c->c_priv && getuid()) {
+		if (c->c_priv && getuid() && ingroup(LPR_OPER) == 0) {
 			printf("?Privileged command\n");
 			continue;
 		}
@@ -160,7 +167,7 @@ cmdscanner(top)
 	longjmp(toplevel, 0);
 }
 
-struct cmd *
+static struct cmd *
 getcmd(name)
 	register char *name;
 {
@@ -275,3 +282,33 @@ help(argc, argv)
 				c->c_name, c->c_help);
 	}
 }
+
+/*
+ * return non-zero if the user is a member of the given group
+ */
+static int
+ingroup(grname)
+	char *grname;
+{
+	static struct group *gptr=NULL;
+	static gid_t groups[NGROUPS];
+	register gid_t gid;
+	register int i;
+
+	if (gptr == NULL) {
+		if ((gptr = getgrnam(grname)) == NULL) {
+			fprintf(stderr, "Warning: unknown group '%s'\n",
+				grname);
+			return(0);
+		}
+		if (getgroups(NGROUPS, groups) < 0) {
+			perror("getgroups");
+			exit(1);
+		}
+	}
+	gid = gptr->gr_gid;
+	for (i = 0; i < NGROUPS; i++)
+		if (gid == groups[i])
+			return(1);
+	return(0);
+}