Date: Mon, 9 Aug 1999 23:29:30 +0900 (JST) From: toshi@jp.freebsd.org To: FreeBSD-gnats-submit@freebsd.org Subject: bin/13043: minigzip -c option support. Message-ID: <199908091429.XAA68208@castle.jp.freebsd.org>
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>Number: 13043
>Category: bin
>Synopsis: minigzip -c option support.
>Confidential: yes
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Mon Aug 9 07:40:00 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator: Toshihiko ARAI
>Release: FreeBSD 3.2-RELEASE i386
>Organization:
>Environment:
FreeBSD 3.2-RELEASE PC/AT Install floppies.
>Description:
/stand/zcat foo.gz uncompressed original file to foo.
(i.e. same as gunzip -d foo.gz)
>How-To-Repeat:
ln -s /usr/bin/minigzip zcat
zcat foo.gz
>Fix:
Implement minigzip -c option.
--- ../../lib/libz/minigzip.c.orig Sun Jan 10 18:53:50 1999
+++ ../../lib/libz/minigzip.c Mon Aug 9 00:30:12 1999
@@ -122,7 +122,6 @@
if (gzwrite(out, buf, (unsigned)len) != len) error(gzerror(out, &err));
}
fclose(in);
- if (gzclose(out) != Z_OK) error("failed gzclose");
}
#ifdef USE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */
@@ -157,7 +156,6 @@
munmap(buf, buf_len);
fclose(in);
- if (gzclose(out) != Z_OK) error("failed gzclose");
return Z_OK;
}
#endif /* USE_MMAP */
@@ -182,7 +180,6 @@
error("failed fwrite");
}
}
- if (fclose(out)) error("failed fclose");
if (gzclose(in) != Z_OK) error("failed gzclose");
}
@@ -215,6 +212,7 @@
}
gz_compress(in, out);
+ if (gzclose(out) != Z_OK) error("failed gzclose");
unlink(file);
}
@@ -255,12 +253,14 @@
gz_uncompress(in, out);
+ if (fclose(out)) error("failed fclose");
unlink(infile);
}
/* ===========================================================================
- * Usage: minigzip [-d] [-f] [-h] [-1 to -9] [files...]
+ * Usage: minigzip [-c] [-d] [-f] [-h] [-1 to -9] [files...]
+ * -c : standart output
* -d : decompress
* -f : compress with Z_FILTERED
* -h : compress with Z_HUFFMAN_ONLY
@@ -271,6 +271,7 @@
int argc;
char *argv[];
{
+ int copyout = 0;
int uncompr = 0;
gzFile file;
char *bname, outmode[20];
@@ -285,12 +286,14 @@
bname = argv[0];
argc--, argv++;
- if (!strcmp(bname, "gunzip") || !strcmp(bname, "zcat"))
+ if (!strcmp(bname, "gunzip"))
uncompr = 1;
+ else if (!strcmp(bname, "zcat"))
+ copyout = uncompr = 1;
while (argc > 0) {
if (strcmp(*argv, "-c") == 0)
- ; /* Just for compatability with gzip */
+ copyout = 1; /* Just for compatability with gzip */
else if (strcmp(*argv, "-d") == 0)
uncompr = 1;
else if (strcmp(*argv, "-f") == 0)
@@ -315,15 +318,39 @@
file = gzdopen(fileno(stdout), outmode);
if (file == NULL) error("can't gzdopen stdout");
gz_compress(stdin, file);
+ if (gzclose(file) != Z_OK) error("failed gzclose");
}
} else {
+ if (copyout) {
+ SET_BINARY_MODE(stdout);
+ if (!uncompr) {
+ file = gzdopen(fileno(stdout), outmode);
+ if (file == NULL) error("can't gzdopen stdout");
+ }
+ }
do {
if (uncompr) {
- file_uncompress(*argv);
+ if (copyout) {
+ file = gzopen(*argv, "rb");
+ if (file == NULL)
+ fprintf(stderr, "%s: can't gzopen %s\n", prog, *argv);
+ else
+ gz_uncompress(file, stdout);
+ } else
+ file_uncompress(*argv);
} else {
- file_compress(*argv, outmode);
+ if (copyout) {
+ FILE * in = fopen(*argv, "rb");
+ if (in == NULL)
+ perror(*argv);
+ else
+ gz_compress(in, file);
+ } else
+ file_compress(*argv, outmode);
}
} while (argv++, --argc);
+ if (copyout && !uncompr)
+ if (gzclose(file) != Z_OK) error("failed gzclose");
}
exit(0);
return 0; /* to avoid warning */
--- minigzip.1.orig Mon Jan 5 16:14:54 1998
+++ minigzip.1 Mon Aug 9 00:07:49 1999
@@ -32,6 +32,7 @@
.Nd minimal implementation of the 'gzip' compression tool
.Sh SYNOPSIS
.Nm minigzip
+.Op Fl c
.Op Fl d
.Op Ar file ...
.Sh DESCRIPTION
@@ -63,6 +64,10 @@
.Nm
reads from standard input and writes the results of the operation
to standard output.
+.Pp
+If the
+.Fl c
+option is specified, write results to standard output.
.Sh SEE ALSO
.Xr gzip 1
.Sh AUTHORS
>Release-Note:
>Audit-Trail:
>Unformatted:
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