summaryrefslogtreecommitdiffstats
path: root/compat/zlib/examples/gzappend.c
diff options
context:
space:
mode:
Diffstat (limited to 'compat/zlib/examples/gzappend.c')
-rw-r--r--compat/zlib/examples/gzappend.c22
1 files changed, 13 insertions, 9 deletions
diff --git a/compat/zlib/examples/gzappend.c b/compat/zlib/examples/gzappend.c
index e9e878e..662dec3 100644
--- a/compat/zlib/examples/gzappend.c
+++ b/compat/zlib/examples/gzappend.c
@@ -1,7 +1,7 @@
/* gzappend -- command to append to a gzip file
- Copyright (C) 2003 Mark Adler, all rights reserved
- version 1.1, 4 Nov 2003
+ Copyright (C) 2003, 2012 Mark Adler, all rights reserved
+ version 1.2, 11 Oct 2012
This software is provided 'as-is', without any express or implied
warranty. In no event will the author be held liable for any damages
@@ -39,6 +39,8 @@
* - Keep gzip file clean on appended file read errors
* - Use in-place rotate instead of auxiliary buffer
* (Why you ask? Because it was fun to write!)
+ * 1.2 11 Oct 2012 - Fix for proper z_const usage
+ * - Check for input buffer malloc failure
*/
/*
@@ -170,7 +172,7 @@ typedef struct {
int size; /* 1 << size is bytes in buf */
unsigned left; /* bytes available at next */
unsigned char *buf; /* buffer */
- unsigned char *next; /* next byte in buffer */
+ z_const unsigned char *next; /* next byte in buffer */
char *name; /* file name for error messages */
} file;
@@ -399,14 +401,14 @@ local void gztack(char *name, int gd, z_stream *strm, int last)
}
/* allocate buffers */
- in = fd == -1 ? NULL : malloc(CHUNK);
+ in = malloc(CHUNK);
out = malloc(CHUNK);
- if (out == NULL) bye("out of memory", "");
+ if (in == NULL || out == NULL) bye("out of memory", "");
/* compress input file and append to gzip file */
do {
/* get more input */
- len = fd == -1 ? 0 : read(fd, in, CHUNK);
+ len = read(fd, in, CHUNK);
if (len == -1) {
fprintf(stderr,
"gzappend warning: error reading %s, skipping rest ...\n",
@@ -453,7 +455,7 @@ local void gztack(char *name, int gd, z_stream *strm, int last)
/* clean up and return */
free(out);
- if (in != NULL) free(in);
+ free(in);
if (fd > 0) close(fd);
}
@@ -467,11 +469,13 @@ int main(int argc, char **argv)
z_stream strm;
/* ignore command name */
- argv++;
+ argc--; argv++;
/* provide usage if no arguments */
if (*argv == NULL) {
- printf("gzappend 1.1 (4 Nov 2003) Copyright (C) 2003 Mark Adler\n");
+ printf(
+ "gzappend 1.2 (11 Oct 2012) Copyright (C) 2003, 2012 Mark Adler\n"
+ );
printf(
"usage: gzappend [-level] file.gz [ addthis [ andthis ... ]]\n");
return 0;