X-Git-Url: https://git.cameronkatri.com/pw-darwin.git/blobdiff_plain/f21ffdee49297c31796eb1cf20c5fae902293938..f233ff62a96a2d0c369be8dcd504c169cbd60ffa:/pw/fileupd.c

diff --git a/pw/fileupd.c b/pw/fileupd.c
index 3470e0a..7df4bb1 100644
--- a/pw/fileupd.c
+++ b/pw/fileupd.c
@@ -1,26 +1,20 @@
 /*-
- * Copyright (c) 1996 by David L. Nugent <davidn@blaze.net.au>.
- * All rights reserved.
+ * Copyright (C) 1996
+ *	David L. Nugent.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer as
- *    the first lines of this file unmodified.
+ *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *	This product includes software developed by David L. Nugent.
- * 4. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
  *
- * THIS SOFTWARE IS PROVIDED BY THE DAVID L. NUGENT ``AS IS'' AND
+ * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT BE LIABLE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
@@ -28,10 +22,13 @@
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
- *
- *	$Id$
  */
 
+#ifndef lint
+static const char rcsid[] =
+  "$FreeBSD$";
+#endif /* not lint */
+
 #include <stdio.h>
 #include <fcntl.h>
 #include <stdlib.h>
@@ -45,115 +42,27 @@
 #include "pwupd.h"
 
 int
-fileupdate(char const * filename, mode_t fmode, char const * newline, char const * prefix, int pfxlen, int updmode)
+extendline(char **buf, int * buflen, int needed)
 {
-	int             rc = 0;
-
-	if (pfxlen <= 1)
-		errno = EINVAL;
-	else {
-		int             infd = open(filename, O_RDWR | O_CREAT | O_EXLOCK, fmode);
-
-		if (infd != -1) {
-			FILE           *infp = fdopen(infd, "r+");
-
-			if (infp == NULL)
-				close(infd);
-			else {
-				int             outfd;
-				char            file[MAXPATHLEN];
-
-				strcpy(file, filename);
-				strcat(file, ".new");
-				outfd = open(file, O_RDWR | O_CREAT | O_TRUNC | O_EXLOCK, fmode);
-				if (outfd != -1) {
-					FILE           *outfp = fdopen(outfd, "w+");
-
-					if (outfp == NULL)
-						close(outfd);
-					else {
-						int             updated = UPD_CREATE;
-						char            line[2048];
-
-						while (fgets(line, sizeof(line), infp) != NULL) {
-							char           *p = strchr(line, '\n');
-
-							if (p == NULL) {	/* Line too long */
-								int             ch;
-
-								fputs(line, outfp);
-								while ((ch = fgetc(infp)) != EOF) {
-									fputc(ch, outfp);
-									if (ch == '\n')
-										break;
-								}
-								continue;
-							}
-							if (*line != '#' && *line != '\n') {
-								if (!updated && strncmp(line, prefix, pfxlen) == 0) {
-									updated = updmode == UPD_REPLACE ? UPD_REPLACE : UPD_DELETE;
-
-									/*
-									 * Only actually write changes if updating
-									 */
-									if (updmode == UPD_REPLACE)
-										strcpy(line, newline);
-									else if (updmode == UPD_DELETE)
-										continue;
-								}
-							}
-							fputs(line, outfp);
-						}
-
-						/*
-						 * Now, we need to decide what to do: If we are in
-						 * update mode, and no record was updated, then error If
-						 * we are in insert mode, and record already exists,
-						 * then error
-						 */
-						if (updmode != updated)
-							errno = (updmode == UPD_CREATE) ? EEXIST : ENOENT;
-						else {
-
-							/*
-							 * If adding a new record, append it to the end
-							 */
-							if (updmode == UPD_CREATE)
-								fputs(newline, outfp);
-
-							/*
-							 * Flush the file and check for the result
-							 */
-							rc = fflush(outfp) != EOF;
-							if (rc) {
-
-								/*
-								 * Copy data back into the
-								 * original file and truncate
-								 */
-								rewind(infp);
-								rewind(outfp);
-								while (fgets(line, sizeof(line), outfp) != NULL)
-									fputs(line, infp);
+	if (needed > *buflen) {
+		char	*tmp = realloc(*buf, needed);
+		if (tmp == NULL)
+			return -1;
+		*buf = tmp;
+		*buflen = needed;
+	}
+	return *buflen;
+}
 
-								/*
-								 * This is a gross hack, but we may have
-								 * corrupted the original file
-								 * Unfortunately, it will lose the inode.
-								 */
-								if (fflush(infp) == EOF || ferror(infp))
-									rc = rename(file, filename) == 0;
-								else
-									ftruncate(infd, ftell(infp));
-							}
-						}
-						fclose(outfp);
-					}
-					remove(file);
-				}
-				fclose(infp);
-			}
-		}
+int
+extendarray(char ***buf, int * buflen, int needed)
+{
+	if (needed > *buflen) {
+		char	**tmp = realloc(*buf, needed * sizeof(char *));
+		if (tmp == NULL)
+			return -1;
+		*buf = tmp;
+		*buflen = needed;
 	}
-	return rc;
+	return *buflen;
 }