--- ray/src/util/rpiece.c	1997/05/20 11:54:55	2.33
+++ ray/src/util/rpiece.c	1998/06/18 09:23:49	2.36
@@ -47,6 +47,11 @@ char *argv[];
 #define guard_io()	0
 #define unguard()	0
 #endif
+
+#ifndef linux
+extern char  *sys_errlist[];
+#endif
+
 				/* rpict command */
 char  *rpargv[128] = {"rpict", "-S", "1"};
 int  rpargc = 3;
@@ -72,8 +77,6 @@ int  verbose = 0;
 unsigned  timelim = 0;
 int  rvrlim = -1;
 
-extern long  lseek(), ftell();
-
 int  gotalrm = 0;
 int  onalrm() { gotalrm++; }
 
@@ -119,7 +122,7 @@ char  *argv[];
 			case 'p':		/* pixel aspect ratio? */
 				if (argv[i][2] != 'a' || argv[i][3])
 					break;
-				pixaspect = atof(argv[i+1]);
+				pixaspect = atof(argv[++i]);
 				continue;
 			case 'T':		/* time limit (hours) */
 				if (argv[i][2])
@@ -193,7 +196,6 @@ int  fd;
 int  ltyp;
 {
 	static struct flock  fls;	/* static so initialized to zeroes */
-	extern char  *sys_errlist[];
 
 	fls.l_type = ltyp;
 	if (fcntl(fd, F_SETLKW, &fls) < 0) {
@@ -506,7 +508,7 @@ int  xpos, ypos;
 		filerr("lock");
 #endif
 				/* write new piece to file */
-	if (lseek(outfd, fls.l_start, 0) == -1)
+	if (lseek(outfd, fls.l_start, 0) < 0)
 		filerr("seek");
 	if (hmult == 1) {
 		if (writebuf(outfd, (char *)pbuf,
@@ -519,7 +521,7 @@ int  xpos, ypos;
 				filerr("write");
 			if (y < vr-1 && lseek(outfd,
 					(long)(hmult-1)*hr*sizeof(COLR),
-					1) == -1)
+					1) < 0)
 				filerr("seek");
 		}
 #if NFS
@@ -548,8 +550,6 @@ int  xpos, ypos;
 filerr(t)			/* report file error and exit */
 char  *t;
 {
-	extern char  *sys_errlist[];
-
 	fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
 			progname, t, outfile, sys_errlist[errno]);
 	_exit(1);