r10592: Add "adfgets()" function, which allocates and reads a line from a fd.

Also add torture tests for this function and file_{load,save}. I've hardcoded
a file name here.. should I handle that neater somehow?
(This used to be commit 8fa383f182f1c4479979455968dd690edc0117ea)

source4/lib/util_file.c

@@ -2,6 +2,8 @@
  * Unix SMB/CIFS implementation.
  * SMB parameters and setup
  * Copyright (C) Andrew Tridgell 1992-1998 Modified by Jeremy Allison 1995.
+ *
+ * Added afdgets() Jelmer Vernooij 2005
  * 
  * This program is free software; you can redistribute it and/or modify it under
  * the terms of the GNU General Public License as published by the Free
@@ -96,6 +98,52 @@ char *fgets_slash(char *s2,int maxlen,XFILE *f)
   return(s);
 }
 
+/* Read one line (data until next newline or eof) and allocate it */
+char *afdgets(int fd, TALLOC_CTX *mem_ctx, size_t hint)
+{
+	char *data = NULL;
+	ssize_t alloc_size = 0, offset = 0, ret;
+	int p;
+
+	if (hint <= 0) hint = 0x100;
+
+	do {
+		alloc_size += hint;
+
+		data = talloc_realloc(mem_ctx, data, char, alloc_size);
+
+		if (!data)
+			return NULL;
+
+		ret = read(fd, data + offset, hint);
+
+		if (ret == -1) {
+			talloc_free(data);
+			return NULL;
+		}
+
+		/* Find newline */
+		for (p = 0; p < ret; p++) {
+			if (data[offset + p] == '\n')
+				break;
+		}
+
+		if (p < ret) {
+			data[offset + p] = '\0';
+
+			/* Go back to position of newline */
+			lseek(fd, p - ret + 1, SEEK_CUR);
+			return data;
+		}
+
+		offset += ret;
+
+	} while (ret == hint);
+
+	data[offset] = '\0';
+
+	return data;
+}
 
 
 /****************************************************************************
@@ -287,7 +335,7 @@ void file_lines_slashcont(char **lines)
 /*
   save a lump of data into a file. Mostly used for debugging 
 */
-BOOL file_save(const char *fname, void *packet, size_t length)
+BOOL file_save(const char *fname, const void *packet, size_t length)
 {
 	int fd;
 	fd = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0644);

source4/torture/config.mk

@@ -149,7 +149,8 @@ ADD_OBJ_FILES = \
 		torture/local/socket.o \
 		torture/local/irpc.o \
 		torture/local/resolve.o \
-		torture/local/util_strlist.o
+		torture/local/util_strlist.o \
+		torture/local/util_file.o
 REQUIRED_SUBSYSTEMS = \
 		LIBSMB \
 		MESSAGING

source4/torture/local/util_file.c

@@ -0,0 +1,101 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   util_file testing
+
+   Copyright (C) Jelmer Vernooij 2005
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "system/filesys.h"
+
+#define TEST_FILENAME "utilfile.test"
+#define TEST_LINE1 "This is list line 1..."
+#define TEST_LINE2 ".. and this is line 2"
+#define TEST_LINE3 "and end of the file"
+
+#define TEST_DATA TEST_LINE1 "\n" TEST_LINE2 "\n" TEST_LINE3
+
+static BOOL test_file_load_save(TALLOC_CTX *mem_ctx)
+{
+	BOOL ret;
+	size_t len;
+	char *data;
+	
+	ret = file_save(TEST_FILENAME, TEST_DATA, strlen(TEST_DATA));
+	if (!ret)
+		return False;
+
+	data = file_load(TEST_FILENAME, &len, mem_ctx);
+	if (!data) 
+		return False;
+
+	if (len != strlen(TEST_DATA))
+		return False;
+	
+	if (memcmp(data, TEST_DATA, len) != 0)
+		return False;
+
+	unlink(TEST_FILENAME);
+
+	return True;
+}
+
+static BOOL test_afdgets(TALLOC_CTX *mem_ctx)
+{
+	int fd;
+	char *line;
+	
+	if (!file_save(TEST_FILENAME, (const void *)TEST_DATA, strlen(TEST_DATA)))
+		return False;
+
+	fd = open(TEST_FILENAME, O_RDONLY);
+	
+	if (fd == -1) 
+		return False;
+
+	line = afdgets(fd, mem_ctx, 8);
+	if (strcmp(line, TEST_LINE1) != 0) 
+		return False;
+
+	line = afdgets(fd, mem_ctx, 8);
+	if (strcmp(line, TEST_LINE2) != 0) 
+		return False;
+
+	line = afdgets(fd, mem_ctx, 8);
+	if (strcmp(line, TEST_LINE3) != 0) 
+		return False;
+
+	close(fd);
+
+	unlink(TEST_FILENAME);
+
+	return True;
+}
+
+BOOL torture_local_util_file(void) 
+{
+	BOOL ret = True;
+	TALLOC_CTX *mem_ctx = talloc_init("test_util_file");
+
+	ret &= test_file_load_save(mem_ctx);
+	ret &= test_afdgets(mem_ctx);
+
+	talloc_free(mem_ctx);
+
+	return ret;
+}

source4/torture/torture.c

@@ -2322,6 +2322,7 @@ static struct {
 	{"LOCAL-IRPC",  torture_local_irpc, 0},
 	{"LOCAL-BINDING", torture_local_binding_string, 0},
 	{"LOCAL-STRLIST", torture_local_util_strlist, 0},
+	{"LOCAL-FILE", torture_local_util_file, 0},
 	{"LOCAL-IDTREE", torture_local_idtree, 0},
 	{"LOCAL-SOCKET", torture_local_socket, 0},
 	{"LOCAL-PAC", torture_pac, 0},