From 4b8a0f3f3dcf60dac2ce308ea08d413a535af29f Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Mon, 15 Apr 2024 21:12:14 +0200
Subject: Adding upstream version 5.4.4.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 readtextfile.c | 140 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 readtextfile.c

(limited to 'readtextfile.c')

diff --git a/readtextfile.c b/readtextfile.c
new file mode 100644
index 0000000..ca74689
--- /dev/null
+++ b/readtextfile.c
@@ -0,0 +1,140 @@
+/*  This file is part of "reprepro"
+ *  Copyright (C) 2007 Bernhard R. Link
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  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., 51 Franklin St, Fifth Floor, Boston, MA  02111-1301  USA
+ */
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <fcntl.h>
+#include "error.h"
+#include "names.h"
+#include "chunks.h"
+#include "readtextfile.h"
+
+/* This file supplies code to read a text file (.changes, .dsc, Release, ...)
+ * into a chunk, warning if it is too long or if it contains binary data */
+
+static bool isbinarydata(const char *buffer, size_t len, const char *source) {
+	size_t i;
+	unsigned char c;
+
+	for (i = 0 ; i < len ; i++) {
+		c = (unsigned char)buffer[i];
+		if (c < ' ' && c != '\t' && c != '\n' && c != '\r') {
+			fprintf(stderr,
+"Unexpected binary character \\%03hho in %s\n",
+					c, source);
+			return true;
+		}
+	}
+	return false;
+}
+
+retvalue readtextfilefd(int fd, const char *source, char **data, size_t *len) {
+	size_t buffersize = 102400, readdata = 0;
+	ssize_t readbytes;
+	char *buffer, *h;
+
+	buffer = malloc(buffersize);
+	if (FAILEDTOALLOC(buffer))
+		return RET_ERROR_OOM;
+	errno = 0;
+	while ((readbytes = read(fd, buffer + readdata, buffersize-readdata))
+			> 0) {
+
+		/* text files are normally small, so it does not hurt to check
+		 * the whole of them always */
+		if (isbinarydata(buffer + readdata, (size_t)readbytes, source)) {
+			free(buffer);
+			return RET_ERROR;
+		}
+		readdata += readbytes;
+		assert (readdata <= buffersize);
+		if (readdata + 1024 >= buffersize) {
+			if (buffersize >= 10*1024*1024) {
+				fprintf(stderr, "Ridiculously large %s\n", source);
+				free(buffer);
+				return RET_ERROR;
+			}
+			buffersize += 51200;
+			h = realloc(buffer, buffersize);
+			if (FAILEDTOALLOC(h)) {
+				free(buffer);
+				return RET_ERROR_OOM;
+			}
+			buffer = h;
+		}
+	}
+	if (readbytes < 0) {
+		int e = errno;
+		free(buffer);
+		fprintf(stderr, "Error reading %s: %s\n", source,
+				strerror(e));
+		return RET_ERRNO(e);
+	}
+	h = realloc(buffer, readdata + 1);
+	if (h == NULL) {
+#ifdef SPLINT
+		h = NULL;
+#endif
+		if (readdata >= buffersize) {
+			free(buffer);
+			return RET_ERROR_OOM;
+		}
+	} else
+		buffer = h;
+	buffer[readdata] = '\0';
+	*data = buffer;
+	if (len != NULL)
+		*len = readdata;
+	return RET_OK;
+}
+
+retvalue readtextfile(const char *source, const char *sourcetoshow, char **data, size_t *len) {
+	int fd; char *buffer; size_t bufferlen;
+	retvalue r;
+	int ret;
+
+	fd = open(source, O_RDONLY|O_NOCTTY);
+	if (fd < 0) {
+		int e = errno;
+		fprintf(stderr, "Error opening '%s': %s\n",
+				sourcetoshow, strerror(e));
+		return RET_ERRNO(e);
+	}
+	r = readtextfilefd(fd, sourcetoshow, &buffer, &bufferlen);
+	if (!RET_IS_OK(r)) {
+		(void)close(fd);
+		return r;
+	}
+	ret = close(fd);
+	if (ret != 0) {
+		int e = errno;
+		free(buffer);
+		fprintf(stderr, "Error reading %s: %s\n", sourcetoshow,
+				strerror(e));
+		return RET_ERRNO(e);
+	}
+	*data = buffer;
+	if (len != NULL)
+		*len = bufferlen;
+	return RET_OK;
+}
-- 
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