svn commit: r314680 - user/bapt/diff

[Baptiste Daroussin]

Author: bapt
Date: Sat Mar  4 21:32:23 2017
New Revision: 314680
URL: https://svnweb.freebsd.org/changeset/base/314680

Log:
  Remove code that seems to be useless
  
  diff(1) was trying to open the non regular file and copy it to a temporary
  file. the code will already anyway read it.

Modified:
  user/bapt/diff/diffreg.c

Modified: user/bapt/diff/diffreg.c
==============================================================================
--- user/bapt/diff/diffreg.c	Sat Mar  4 21:06:40 2017	(r314679)
+++ user/bapt/diff/diffreg.c	Sat Mar  4 21:32:23 2017	(r314680)
@@ -194,7 +194,6 @@ struct context_vec {
 };
 
 #define	diff_output	printf
-static FILE	*opentemp(const char *);
 static void	 output(char *, FILE *, char *, FILE *, int);
 static void	 check(FILE *, FILE *, int);
 static void	 range(int, int, const char *);
@@ -334,14 +333,7 @@ diffreg(char *file1, char *file2, int fl
 	if (flags & D_EMPTY1)
 		f1 = fopen(_PATH_DEVNULL, "r");
 	else {
-		if (!S_ISREG(stb1.st_mode)) {
-			if ((f1 = opentemp(file1)) == NULL ||
-			    fstat(fileno(f1), &stb1) < 0) {
-				warn("%s", file1);
-				status |= 2;
-				goto closem;
-			}
-		} else if (strcmp(file1, "-") == 0)
+		if (strcmp(file1, "-") == 0)
 			f1 = stdin;
 		else
 			f1 = fopen(file1, "r");
@@ -355,14 +347,7 @@ diffreg(char *file1, char *file2, int fl
 	if (flags & D_EMPTY2)
 		f2 = fopen(_PATH_DEVNULL, "r");
 	else {
-		if (!S_ISREG(stb2.st_mode)) {
-			if ((f2 = opentemp(file2)) == NULL ||
-			    fstat(fileno(f2), &stb2) < 0) {
-				warn("%s", file2);
-				status |= 2;
-				goto closem;
-			}
-		} else if (strcmp(file2, "-") == 0)
+		if (strcmp(file2, "-") == 0)
 			f2 = stdin;
 		else
 			f2 = fopen(file2, "r");
@@ -549,37 +534,6 @@ files_differ(FILE *f1, FILE *f2, int fla
 	}
 }
 
-static FILE *
-opentemp(const char *path)
-{
-	char buf[BUFSIZ], tempfile[PATH_MAX];
-	ssize_t nread;
-	int ifd, ofd;
-
-	if (strcmp(path, "-") == 0)
-		ifd = STDIN_FILENO;
-	else if ((ifd = open(path, O_RDONLY, 0644)) < 0)
-		return (NULL);
-
-	(void)strlcpy(tempfile, _PATH_TMP "/diff.XXXXXXXX", sizeof(tempfile));
-
-	if ((ofd = mkstemp(tempfile)) < 0) {
-		close(ifd);
-		return (NULL);
-	}
-	unlink(tempfile);
-	while ((nread = read(ifd, buf, BUFSIZ)) > 0) {
-		if (write(ofd, buf, nread) != nread) {
-			close(ifd);
-			close(ofd);
-			return (NULL);
-		}
-	}
-	close(ifd);
-	lseek(ofd, (off_t)0, SEEK_SET);
-	return (fdopen(ofd, "r"));
-}
-
 char *
 splice(char *dir, char *path)
 {