Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>

int touch(int, char *);
ulong now;

void
usage(void)
{
        fprint(2, "usage: touch [-c] [-t time] files\n");
        exits("usage");
}

void
main(int argc, char **argv)
{
        char *t, *s;
        int nocreate = 0;
        int status = 0;

        now = time(0);
        ARGBEGIN{
        case 't':
                t = EARGF(usage());
                now = strtoul(t, &s, 0);
                if(s == t || *s != '\0')
                        usage();
                break;
        case 'c':
                nocreate = 1;
                break;
        default:        
                usage();
        }ARGEND

        if(!*argv)
                usage();
        while(*argv)
                status += touch(nocreate, *argv++);
        if(status)
                exits("touch");
        exits(0);
}

touch(int nocreate, char *name)
{
        Dir stbuff;
        int fd;

        nulldir(&stbuff);
        stbuff.mtime = now;
        if(dirwstat(name, &stbuff) >= 0)
                return 0;
        if(nocreate){
                fprint(2, "touch: %s: cannot wstat: %r\n", name);
                return 1;
        }
        if((fd = create(name, OREAD|OEXCL, 0666)) < 0){
                fprint(2, "touch: %s: cannot create: %r\n", name);
                return 1;
        }
        dirfwstat(fd, &stbuff);
        close(fd);
        return 0;
}