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mkpaqfs(8): allow setting compression level

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This commit is contained in:
cinap_lenrek 2021-05-23 17:06:14 +02:00
parent 33682347b9
commit d168b89ab1
2 changed files with 15 additions and 2 deletions
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8
sys/man/8/mkpaqfs
View file

@ -6,6 +6,8 @@ mkpaqfs \- make a compressed read-only file system
[
.B -u
] [
.B -1-9
] [
.B -b
.I blocksize
] [
@ -42,6 +44,12 @@ option is set, the blocks are not compressed.
Otherwise each block is compressed using the
.IR flate (2)
compression algorithm.
The compression level can be set using the flags
.B -1
to
.B -9
(defaults to
.BR -6 ).
The
.B -l
option embeds a label of up to 32 bytes within the file header and may be

9
sys/src/cmd/paqfs/mkpaqfs.c
View file

@ -33,6 +33,7 @@ void warn(char *fmt, ...);
int uflag=0; /* uncompressed */
long blocksize = 4*1024;
int level = 6;
Biobuf *out;
DigestState *outdg;
@ -57,6 +58,10 @@ main(int argc, char *argv[])
if(label == nil)
usage();
break;
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
level = ARGC() - '0';
break;
case 'b':
s = ARGF();
if(s) {
@ -105,7 +110,7 @@ main(int argc, char *argv[])
void
usage(void)
{
fprint(2, "usage: %s [-u] [-b blocksize] -o output [root]\n", argv0);
fprint(2, "usage: %s [-u] [-1-9] [-b blocksize] -o output [root]\n", argv0);
exits("usage");
}
@ -370,7 +375,7 @@ writeBlock(uchar *b, int type)
if(!uflag) {
cb = emallocz(blocksize);
n = deflateblock(cb, blocksize, b, blocksize, 6, 0);
n = deflateblock(cb, blocksize, b, blocksize, level, 0);
if(n > 0 && n < blocksize) {
bh.encoding = DeflateEnc;
bh.size = n;