hello,
here is a simple patch to add -k (keep) flag to
gzip/compress. freebsd has it, netbsd has it (although
omitted from the manpages), linux has it.
my use case is automating gzip compression for nginx's
ngx_http_gzip_static_module that can serve
precompressed files from the same directory, but
i also need to keep the input files.
i am aware that
$ gzip -c file > file.gz
does the same, but -k could make certain things easier:
$ find . -name "*.html" -exec gzip -k {} \;
-f
--
Index: compress.1
===================================================================
RCS file: /cvs/src/usr.bin/compress/compress.1,v
retrieving revision 1.48
diff -u -p -r1.48 compress.1
--- compress.1 17 Mar 2014 14:23:50 -0000 1.48
+++ compress.1 7 Jan 2017 19:10:58 -0000
@@ -44,7 +44,7 @@
.Nd compress and expand data (compress mode)
.Sh SYNOPSIS
.Nm compress
-.Op Fl 123456789cdfghlNnOqrtv
+.Op Fl 123456789cdfghklNnOqrtv
.Op Fl b Ar bits
.Op Fl o Ar filename
.Op Fl S Ar suffix
@@ -192,6 +192,8 @@ Use the deflate scheme, which reportedly
mode).
.It Fl h
Print a short help message.
+.It Fl k
+Keep (do not delete) input files during compression or decompression.
.It Fl l
List information for the specified compressed files.
The following information is listed:
Index: gzip.1
===================================================================
RCS file: /cvs/src/usr.bin/compress/gzip.1,v
retrieving revision 1.14
diff -u -p -r1.14 gzip.1
--- gzip.1 7 Oct 2014 21:06:30 -0000 1.14
+++ gzip.1 7 Jan 2017 19:10:58 -0000
@@ -183,6 +183,8 @@ behave as
.Xr cat 1 .
.It Fl h
Print a short help message.
+.It Fl k
+Keep (do not delete) input files during compression or decompression.
.It Fl L
A no-op which exists for compatibility only.
On GNU gzip, it displays the program's license.
Index: main.c
===================================================================
RCS file: /cvs/src/usr.bin/compress/main.c,v
retrieving revision 1.94
diff -u -p -r1.94 main.c
--- main.c 3 Sep 2016 13:26:50 -0000 1.94
+++ main.c 7 Jan 2017 19:10:58 -0000
@@ -51,6 +51,7 @@
#define min(a,b) ((a) < (b)? (a) : (b))
int cat, decomp, pipin, force, verbose, testmode, list, recurse, storename;
+int keep;
extern char *__progname;
const struct compressor {
@@ -73,7 +74,7 @@ const struct compressor {
"deflate",
".gz",
"\037\213",
- "123456789ab:cdfhLlNnOo:qrS:tVv",
+ "123456789ab:cdfhkLlNnOo:qrS:tVv",
"cfhLlNno:qrtVv",
"fhqr",
gz_ropen,
@@ -90,7 +91,7 @@ const struct compressor {
"compress",
".Z",
"\037\235",
- "123456789ab:cdfghlNnOo:qrS:tv",
+ "123456789ab:cdfghklNnOo:qrS:tv",
"cfhlNno:qrtv",
"fghqr",
z_ropen,
@@ -108,7 +109,7 @@ const struct compressor null_method = {
"null",
".nul",
"XX",
- "123456789ab:cdfghlNnOo:qrS:tv",
+ "123456789ab:cdfghklNnOo:qrS:tv",
"cfhlNno:qrtv",
"fghqr",
null_ropen,
@@ -139,6 +140,7 @@ const struct option longopts[] = {
{ "uncompress", no_argument, 0, 'd' },
{ "force", no_argument, 0, 'f' },
{ "help", no_argument, 0, 'h' },
+ { "keep", no_argument, 0, 'k' },
{ "list", no_argument, 0, 'l' },
{ "license", no_argument, 0, 'L' },
{ "no-name", no_argument, 0, 'n' },
@@ -274,6 +276,9 @@ main(int argc, char *argv[])
strlcpy(suffix, method->suffix, sizeof(suffix));
bits = 6;
break;
+ case 'k':
+ keep++;
+ break;
case 'l':
list++;
testmode = 1;
@@ -456,7 +461,7 @@ main(int argc, char *argv[])
switch (error) {
case SUCCESS:
- if (!cat && !testmode) {
+ if (!cat && !testmode && !keep) {
if (!pipin && unlink(infile) && verbose >= 0)
warn("input: %s", infile);
}
@@ -939,7 +944,7 @@ usage(int status)
switch (pmode) {
case MODE_COMP:
- fprintf(stderr, "usage: %s [-123456789cdf%sh%slNnOqrt%sv] "
+ fprintf(stderr, "usage: %s [-123456789cdf%shk%slNnOqrt%sv] "
"[-b bits] [-o filename] [-S suffix]\n"
" %*s [file ...]\n", __progname,
!gzip ? "g" : "", gzip ? "L" : "", gzip ? "V" : "",
