--- ray/src/util/getinfo.c	1989/02/02 10:49:19	1.1
+++ ray/src/util/getinfo.c	2019/07/16 17:07:35	2.19
@@ -1,9 +1,6 @@
-/* Copyright (c) 1986 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char	RCSid[] = "$Id: getinfo.c,v 2.19 2019/07/16 17:07:35 greg Exp $";
 #endif
-
 /*
  *  getinfo.c - program to read info. header from file.
  *
@@ -11,10 +8,31 @@ static char SCCSid[] = "$SunId$ LBL";
  */
 
 #include  <stdio.h>
+#include  <string.h>
 
+#include  "platform.h"
+#include  "rtprocess.h"
+#include  "resolu.h"
 
-tabstr(s)				/* put out line followed by tab */
-register char  *s;
+#ifdef getc_unlocked		/* avoid nasty file-locking overhead */
+#undef getc
+#undef getchar
+#undef putchar
+#define getc		getc_unlocked
+#define getchar		getchar_unlocked
+#define putchar		putchar_unlocked
+#endif
+
+static gethfunc tabstr;
+static void getdim(FILE *fp);
+static void copycat(void);
+
+
+static int
+tabstr(				/* put out line followed by tab */
+	char  *s,
+	void *p
+)
 {
 	while (*s) {
 		putchar(*s);
@@ -22,56 +40,127 @@ register char  *s;
 	}
 	if (*--s == '\n')
 		putchar('\t');
+	return(0);
 }
 
 
-main(argc, argv)
-int  argc;
-char  *argv[];
+int
+main(
+	int  argc,
+	char  **argv
+)
 {
 	int  dim = 0;
 	FILE  *fp;
 	int  i;
 
-	if (argc > 1 && !strcmp(argv[1], "-d")) {
+	if (argc > 1 && (argv[1][0] == '-') | (argv[1][0] == '+') &&
+			argv[1][1] == 'd') {
+		dim = 1 - 2*(argv[1][0] == '-');
 		argc--; argv++;
-		dim = 1;
 	}
+#ifdef getc_unlocked				/* avoid lock/unlock overhead */
+	flockfile(stdin);
+#endif
+	SET_FILE_BINARY(stdin);
+	if (argc > 2 && !strcmp(argv[1], "-c")) {
+		SET_FILE_BINARY(stdout);
+		setvbuf(stdin, NULL, _IONBF, 2);
+		if (getheader(stdin, (gethfunc *)fputs, stdout) < 0)
+			return 1;
+		printargs(argc-2, argv+2, stdout);
+		fputc('\n', stdout);
+		if (dim) {			/* copy resolution string? */
+			RESOLU	rs;
+			if (!fgetsresolu(&rs, stdin)) {
+				fputs("No resolution string\n", stderr);
+				return 1;
+			}
+			if (dim > 0)
+				fputsresolu(&rs, stdout);
+		}
+		fflush(stdout);
+		execvp(argv[2], argv+2);
+		perror(argv[2]);
+		return 1;
+	} else if (argc > 2 && !strcmp(argv[1], "-a")) {
+		SET_FILE_BINARY(stdout);
+		if (getheader(stdin, (gethfunc *)fputs, stdout) < 0)
+			return 1;
+		for (i = 2; i < argc; i++) {
+			int	len = strlen(argv[i]);
+			if (!len) continue;
+			fputs(argv[i], stdout);
+			if (argv[i][len-1] != '\n')
+				fputc('\n', stdout);
+		}
+		fputc('\n', stdout);
+		copycat();
+		return 0;
+	} else if (argc == 2 && !strcmp(argv[1], "-")) {
+		SET_FILE_BINARY(stdout);
+		if (getheader(stdin, NULL, NULL) < 0)
+			return 1;
+		if (dim < 0) {			/* skip resolution string? */
+			RESOLU	rs;
+			if (!fgetsresolu(&rs, stdin)) {
+				fputs("No resolution string\n", stderr);
+				return 1;
+			}
+		}
+		copycat();
+		return 0;
+	}
 	for (i = 1; i < argc; i++) {
 		fputs(argv[i], stdout);
 		if ((fp = fopen(argv[i], "r")) == NULL)
 			fputs(": cannot open\n", stdout);
 		else {
-			if (dim) {
+			if (dim < 0) {			/* dimensions only */
+				if (getheader(fp, NULL, NULL) < 0) {
+					fputs("bad header\n", stdout);
+					continue;	
+				}
 				fputs(": ", stdout);
 				getdim(fp);
 			} else {
-				tabstr(":\n");
-				getheader(fp, tabstr);
-				putchar('\n');
+				tabstr(":\n", NULL);
+				if (getheader(fp, tabstr, NULL) < 0)
+					return 1;
+				fputc('\n', stdout);
+				if (dim > 0) {
+					fputc('\t', stdout);
+					getdim(fp);
+				}
 			}
 			fclose(fp);
 		}
 	}
-	if (argc == 1)
-		if (dim) {
+	if (argc == 1) {
+		if (dim < 0) {
+			if (getheader(stdin, NULL, NULL) < 0)
+				return 1;	
 			getdim(stdin);
 		} else {
-			copyheader(stdin, stdout);
-			putchar('\n');
+			if (getheader(stdin, (gethfunc *)fputs, stdout) < 0)
+				return 1;
+			fputc('\n', stdout);
+			if (dim > 0)
+				getdim(stdin);
 		}
-	exit(0);
+	}
+	return 0;
 }
 
 
-getdim(fp)				/* get dimensions from file */
-register FILE  *fp;
+static void
+getdim(				/* get dimensions from file */
+	FILE  *fp
+)
 {
 	int  j;
-	register int  c;
+	int  c;
 
-	getheader(fp, NULL);	/* skip header */
-
 	switch (c = getc(fp)) {
 	case '+':		/* picture */
 	case '-':
@@ -83,17 +172,30 @@ register FILE  *fp;
 		getc(fp);
 		j = 0;
 		while ((c = getc(fp)) != EOF)
-			if (c == 0)
+			if (c == 0) {
 				if (++j >= 4)
 					break;
-				else
-					putchar(' ');
-			else
+				putchar(' ');
+			} else {
 				putchar(c);
+			}
 		putchar('\n');
 		break;
 	default:		/* ??? */
 		fputs("unknown file type\n", stdout);
 		break;
 	}
+}
+
+
+static void
+copycat(void)			/* copy input to output */
+{
+	char	buf[8192];
+	int	n;
+
+	fflush(stdout);
+	while ((n = fread(buf, 1, sizeof(buf), stdin)) > 0)
+		if (writebuf(fileno(stdout), buf, n) != n)
+			break;
 }