/* 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
* - 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
*/
/*
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;
}
/* 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",
/* clean up and return */
free(out);
- if (in != NULL) free(in);
+ free(in);
if (fd > 0) close(fd);
}
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;