gzip, bzip2: add -n flag to suppress modification timestamp

[plan9front.git] / sys / src / cmd / bzip2 / bzip2.c

diff --git a/sys/src/cmd/bzip2/bzip2.c b/sys/src/cmd/bzip2/bzip2.c
index 17c2d06da477cf69b6f7c8bd965ea10de272ec68..72630f04f676995e2781445a20ac129c172e7e5e 100644 (file)
--- a/sys/src/cmd/bzip2/bzip2.c
+++ b/sys/src/cmd/bzip2/bzip2.c
@@ -3,7 +3,7 @@
 #include <bio.h>
 #include "bzlib.h"
 
-static int     bzipf(char*, int);
+static int     bzipf(char*, int, int);
 static int     bzip(char*, long, int, Biobuf*);
 
 static Biobuf  bout;
@@ -15,7 +15,7 @@ static        int     verbose;
 static void
 usage(void)
 {
-       fprint(2, "usage: bzip2 [-vcD] [-1-9] [file ...]\n");
+       fprint(2, "usage: bzip2 [-vcnD] [-1-9] [file ...]\n");
        exits("usage");
 }
 
@@ -23,9 +23,11 @@ void
 main(int argc, char **argv)
 {
        int i, ok, stdout;
+       long mtime;
 
        level = 6;
        stdout = 0;
+       mtime = time(nil);
        ARGBEGIN{
        case 'D':
                debug++;
@@ -36,6 +38,9 @@ main(int argc, char **argv)
        case 'c':
                stdout++;
                break;
+       case 'n':
+               mtime = 0;
+               break;
        case '1': case '2': case '3': case '4':
        case '5': case '6': case '7': case '8': case '9':
                level = ARGC() - '0';
@@ -47,18 +52,18 @@ main(int argc, char **argv)
 
        if(argc == 0){
                Binit(&bout, 1, OWRITE);
-               ok = bzip(nil, time(0), 0, &bout);
+               ok = bzip(nil, mtime, 0, &bout);
                Bterm(&bout);
        }else{
                ok = 1;
                for(i = 0; i < argc; i++)
-                       ok &= bzipf(argv[i], stdout);
+                       ok &= bzipf(argv[i], !mtime, stdout);
        }
        exits(ok ? nil: "errors");
 }
 
 static int
-bzipf(char *file, int stdout)
+bzipf(char *file, int nomtime, int stdout)
 {
        Dir *dir;
        char ofile[128], *f, *s;
@@ -110,7 +115,7 @@ bzipf(char *file, int stdout)
                fprint(2, "compressing %s to %s\n", file, ofile);
 
        Binit(&bout, ofd, OWRITE);
-       ok = bzip(file, dir->mtime, ifd, &bout);
+       ok = bzip(file, nomtime ? 0 : dir->mtime, ifd, &bout);
        if(!ok || Bflush(&bout) < 0){
                fprint(2, "bzip2: error writing %s: %r\n", ofile);
                if(!stdout)