Fix most of the warnings generated by compiling lpr with -Wnon-const-format,

often by just telling gcc that some internal routine is "__printflike"
(work done by Kris Kennaway <kris@FreeBSD.org>).  Also fix the new warnings
which show up once gcc starts checking the "printf-like parameters" passed
to those routines.

MFC after:	1 week

usr.sbin/lpr/common_source/displayq.c

@@ -270,10 +270,10 @@ warn(const struct printer *pp)
 void
 header(void)
 {
-	printf(head0);
+	printf("%s", head0);
 	col = strlen(head0)+1;
 	blankfill(SIZCOL);
-	printf(head1);
+	printf("%s", head1);
 }
 
 void
@@ -454,7 +454,7 @@ dump(const char *nfile, const char *datafile, int copies)
 				remetc = strlen(etctmpl);
 			etc[0] = '\0';
 			strncat(etc, etctmpl, remetc);
-			printf(etc);
+			printf("%s", etc);
 			col += remetc;
 			rem -= remetc;
 			/* room for the last segment of this filename? */

usr.sbin/lpr/common_source/lp.h

@@ -242,7 +242,8 @@ void	 closeallfds(int _start);
 void	 delay(int _millisec);
 void	 displayq(struct printer *_pp, int _format);
 void	 dump(const char *_nfile, const char *_datafile, int _copies);
-void	 fatal(const struct printer *_pp, const char *_msg, ...);
+void	 fatal(const struct printer *_pp, const char *_msg, ...)
+	    __printflike(2, 3);
 int	 firstprinter(struct printer *_pp, int *_error);
 void	 free_printer(struct printer *_pp);
 void	 free_request(struct request *_rp);

usr.sbin/lpr/lpc/cmds.c

@@ -166,7 +166,7 @@ looperr:
 				case PCAPERR_SUCCESS:
 					break;
 				default:
-					fatal(pp, pcaperr(cmdstatus));
+					fatal(pp, "%s", pcaperr(cmdstatus));
 				}
 			} while (more && cmdstatus);
 		}
@@ -182,7 +182,7 @@ looperr:
 		cmdstatus = getprintcap(*argv, pp);
 		switch (cmdstatus) {
 		default:
-			fatal(pp, pcaperr(cmdstatus));
+			fatal(pp, "%s", pcaperr(cmdstatus));
 		case PCAPERR_NOTFOUND:
 			printf("unknown printer %s\n", *argv);
 			continue;
@@ -700,7 +700,7 @@ looperr:
 				case PCAPERR_SUCCESS:
 					break;
 				default:
-					fatal(pp, pcaperr(cmdstatus));
+					fatal(pp, "%s", pcaperr(cmdstatus));
 				}
 			} while (more && cmdstatus);
 		}
@@ -710,7 +710,7 @@ looperr:
 	cmdstatus = getprintcap(argv[1], pp);
 	switch (cmdstatus) {
 	default:
-		fatal(pp, pcaperr(cmdstatus));
+		fatal(pp, "%s", pcaperr(cmdstatus));
 	case PCAPERR_NOTFOUND:
 		printf("unknown printer %s\n", argv[1]);
 		return;
@@ -974,7 +974,7 @@ topq(int argc, char *argv[])
 	cmdstatus = getprintcap(*argv, pp);
 	switch(cmdstatus) {
 	default:
-		fatal(pp, pcaperr(cmdstatus));
+		fatal(pp, "%s", pcaperr(cmdstatus));
 	case PCAPERR_NOTFOUND:
 		printf("unknown printer %s\n", *argv);
 		return;

usr.sbin/lpr/lpd/lpd.c

@@ -115,7 +115,7 @@ static void	 startup(void);
 static void	 chkhost(struct sockaddr *_f, int _ch_opts);
 static int	 ckqueue(struct printer *_pp);
 static void	 fhosterr(int _dosys, const char *_sysmsg, const char *_usermsg,
-			  ...);
+			  ...) __printf0like(3, 4);
 static int	*socksetup(int _af, int _debuglvl);
 static void	 usage(void);
 
@@ -512,7 +512,7 @@ doit(void)
 			}
 			status = getprintcap(printer, pp);
 			if (status < 0)
-				fatal(pp, pcaperr(status));
+				fatal(pp, "%s", pcaperr(status));
 			displayq(pp, cbuf[0] == CMD_SHOWQ_LONG);
 			exit(0);
 		case CMD_RMJOB:	/* remove a job from the queue */

usr.sbin/lpr/lpd/printjob.c

@@ -133,7 +133,8 @@ static void	 opentty(const struct printer *_pp);
 static void	 openrem(const struct printer *pp);
 static int	 print(struct printer *_pp, int _format, char *_file);
 static int	 printit(struct printer *_pp, char *_file);
-static void	 pstatus(const struct printer *_pp, const char *_msg, ...);
+static void	 pstatus(const struct printer *_pp, const char *_msg, ...)
+		    __printflike(2, 3);
 static char	 response(const struct printer *_pp);
 static void	 scan_out(struct printer *_pp, int _scfd, char *_scsp, 
 		    int _dlm);
@@ -1605,7 +1606,7 @@ opennet(const struct printer *pp)
 		}
 		sleep(i);
 	}
-	pstatus(pp, "sending to %s port %d", ep, port);
+	pstatus(pp, "sending to %s port %lu", ep, port);
 }
 
 /*

usr.sbin/lpr/lpd/recvjob.c

@@ -58,6 +58,7 @@ static const char rcsid[] =
 #include <signal.h>
 #include <fcntl.h>
 #include <dirent.h>
+#include <errno.h>
 #include <syslog.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -75,7 +76,7 @@ static const char	*sp = "";
 static char	 tfname[NAME_MAX];	/* tmp copy of cf before linking */
 
 static int	 chksize(int _size);
-static void	 frecverr(const char *_msg, ...);
+static void	 frecverr(const char *_msg, ...) __printf0like(1, 2);
 static int	 noresponse(void);
 static void	 rcleanup(int _signo);
 static int	 read_number(const char *_fn);
@@ -115,7 +116,8 @@ recvjob(const char *printer)
 	}
 
 	if (chdir(pp->spool_dir) < 0)
-		frecverr("%s: %s: %m", pp->printer, pp->spool_dir);
+		frecverr("%s: chdir(%s): %s", pp->printer, pp->spool_dir,
+		    strerror(errno));
 	if (stat(pp->lock_file, &stb) == 0) {
 		if (stb.st_mode & 010) {
 			/* queue is disabled */
@@ -123,7 +125,8 @@ recvjob(const char *printer)
 			exit(1);
 		}
 	} else if (stat(pp->spool_dir, &stb) < 0)
-		frecverr("%s: %s: %m", pp->printer, pp->spool_dir);
+		frecverr("%s: stat(%s): %s", pp->printer, pp->spool_dir,
+		    strerror(errno));
 	minfree = 2 * read_number("minfree");	/* scale KB to 512 blocks */
 	signal(SIGTERM, rcleanup);
 	signal(SIGPIPE, rcleanup);
@@ -204,7 +207,8 @@ readjob(struct printer *pp)
 				continue;
 			}
 			if (link(tfname, cp) < 0)
-				frecverr("%s: %m", tfname);
+				frecverr("%s: link(%s): %s", pp->printer,
+				    tfname, strerror(errno));
 			(void) unlink(tfname);
 			tfname[0] = '\0';
 			cfcnt++;
@@ -254,8 +258,8 @@ readfile(struct printer *pp, char *file, int size)
 
 	fd = open(file, O_CREAT|O_EXCL|O_WRONLY, FILMOD);
 	if (fd < 0) {
-		frecverr("%s: readfile: error on open(%s): %m",
-			 pp->printer, file);
+		frecverr("%s: readfile: error on open(%s): %s",
+			 pp->printer, file, strerror(errno));
 		/*NOTREACHED*/
 	}
 	ack();

usr.sbin/lpr/lpq/lpq.c

@@ -152,7 +152,7 @@ looperr:
 				case PCAPERR_SUCCESS:
 					break;
 				default:
-					fatal(pp, pcaperr(status));
+					fatal(pp, "%s", pcaperr(status));
 				}
 			} while (more && status);
 		}
@@ -162,7 +162,7 @@ looperr:
 		init_printer(pp);
 		status = getprintcap(printer, pp);
 		if (status < 0)
-			fatal(pp, pcaperr(status));
+			fatal(pp, "%s", pcaperr(status));
 
 		displayq(pp, lflag);
 	}