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WebSVN – planix.SVN – Blame – /os/branches/feature_tlsv12/sys/src/cmd/unlnfs.c – Rev 2

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#include <u.h>
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#include <libc.h>
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#include <bio.h>
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#include <libsec.h>
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enum
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{
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	ENCLEN = 26,
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};
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typedef struct Name Name;
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struct Name {
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	char	shortname[ENCLEN + 1];
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	char*	longname;
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	Name*	next;
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};
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Name *names;
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void rename(char*, char*, char*);
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void renamedir(char*);
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void readnames(char*);
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void
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main(int argc, char **argv)
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{
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	char lnfile[256], *d;
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	d = ".";
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	if(argc > 1)
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		d = argv[1];
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	snprint(lnfile, sizeof(lnfile), "%s/.longnames", d);
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	readnames(lnfile);
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	renamedir(d);
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}
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void
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renamedir(char *d)
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{
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	int n;
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	Dir *dir;
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	char *sub;
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	int fd, i;
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	Name *na;
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	fd = open(d, OREAD);
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	if (fd == -1)
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		return;
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	while((n = dirread(fd, &dir)) > 0){
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		for(i = 0; i < n; i++){
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			if(dir[i].mode & DMDIR){
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				sub = malloc(strlen(d) + 1 + strlen(dir[i].name) + 1);
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				sprint(sub, "%s/%s", d, dir[i].name);
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				renamedir(sub);
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				free(sub);
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			}
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			if(strlen(dir[i].name) != ENCLEN)
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				continue;
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			for (na = names; na != nil; na = na->next){
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				if (strcmp(na->shortname, dir[i].name) == 0){
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					rename(d, dir[i].name, na->longname);
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					break;
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				}
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			}
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		}
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		free(dir);
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	}
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	close(fd);
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}
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void
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rename(char *d, char *old, char *new)
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{
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	char *p;
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	Dir dir;
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	p = malloc(strlen(d) + 1 + strlen(old) + 1);
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	sprint(p, "%s/%s", d, old);
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	nulldir(&dir);
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	dir.name = new;
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	if(dirwstat(p, &dir) == -1)
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		fprint(2, "unlnfs: cannot rename %s to %s: %r\n", p, new);
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	free(p);
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}
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void
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long2short(char shortname[ENCLEN+1], char *longname)
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{
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	uchar digest[MD5dlen];
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	md5((uchar*)longname, strlen(longname), digest, nil);
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	enc32(shortname, ENCLEN+1, digest, MD5dlen);
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}
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void
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readnames(char *lnfile)
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{
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	Biobuf *bio;
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	char *f;
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	Name *n;
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	bio = Bopen(lnfile, OREAD);
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	if(bio == nil){
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		fprint(2, "unlnfs: cannot open %s: %r\n", lnfile);
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		exits("error");
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	}
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	while((f = Brdstr(bio, '\n', 1)) != nil){
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		n = malloc(sizeof(Name));
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		n->longname = f;
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		long2short(n->shortname, f);
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		n->next = names;
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		names = n;
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	}
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	Bterm(bio);
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}