int ismatch(char* s, char* p)
{
if(*s == '\0' && *p == '\0')
return 1;
if(*p == '*' && *(p+1) != '\0' && *s == '\0')
return 0;
if(*p == '?' || *p == *s)
return ismatch(s+1, p+1);
if(*p == '*')
return ismatch(s, p+1) || ismatch(s+1, p);
return 0;
}
void main()
{
char s[] = "match";
char p[] = "m?tc*??";
printf("\nismatch(%s, %s) = %s\n", s, p, ismatch(s, p) ? "Matching" : "Not a match");
}
/*
* Given a process id, iterate through all open files of that process
* looking for a match to the target file, and then determine how it
* is being used by that process. This is quite different in QNX to
* UNIX, as chroot and chdir do not hold open a reference to the file.
* The iteration process attempts to dup each file descriptor into
* this process, so it can then be queried; attempt to skip things which
* aren't files (heuristic guess) and use a timeout as self-defence.
*/
int howused(pid_t pid, match_t *match)
{
struct _server_info sinfo;
struct _fdinfo finfo;
struct stat st;
io_dup_t msg;
uint64_t to;
int fd, coid, usage;
usage = 0;
for (fd = 0; (fd = ConnectServerInfo(pid, fd, &sinfo)) != -1; ++fd) {
if ((pid != sinfo.pid || !(fd & _NTO_SIDE_CHANNEL)) && (coid = ConnectAttach(sinfo.nd, sinfo.pid, sinfo.chid, 0, _NTO_COF_CLOEXEC)) != -1) {
msg.i.type = _IO_DUP;
msg.i.combine_len = sizeof(msg.i);
msg.i.info.nd = netmgr_remote_nd(sinfo.nd, ND_LOCAL_NODE);
msg.i.info.pid = pid;
msg.i.info.chid = sinfo.chid;
msg.i.info.scoid = sinfo.scoid;
msg.i.info.coid = fd;
TimerTimeout(CLOCK_MONOTONIC, _NTO_TIMEOUT_SEND | _NTO_TIMEOUT_REPLY, NULL, (to = 1000000000LL, &to), NULL);
if (MsgSend(coid, &msg.i, sizeof(msg.i), NULL, 0) == -1) {
ConnectDetach(coid);
}
else {
if (fstat(coid, &st) != -1 && ismatch(match, st.st_dev, st.st_ino)) {
if (iofdinfo(coid, 0, &finfo, NULL, 0) == -1 || sinfo.pid != PATHMGR_PID || finfo.mode != 0)
usage |= USED_OPEN;
}
close(coid);
}
}
}
return(usage);
}
/*
* Concatenate a directory path and a filename. Note that this function
* currently does NOT handle the case where file itself contains
* directory components (except on Unix platforms, because it is trivial.)
*/
char *nasm_catfile(const char *dir, const char *file)
{
#ifndef catsep
return nasm_strcat(dir, file);
#else
size_t dl = strlen(dir);
size_t fl = strlen(file);
char *p;
bool dosep = true;
if (!dl || ismatch(separators, dir[dl-1])) {
/* No separator necessary */
dosep = false;
}
p = nasm_malloc(dl + fl + dosep + 1);
memcpy(p, dir, dl);
p += dl;
if (dosep)
*p++ = catsep;
memcpy(p, file, fl+1);
return p;
#endif
}
/* Return the directory name portion of a PATH as a new string */
char *nasm_dirname(const char *path)
{
const char *p = first_filename_char(path);
const char *p0 = p;
(void)p0; /* Don't warn if unused */
if (p == path)
return nasm_strdup(curdir);
#ifdef cleandirend
while (p > path+leaveonclean) {
if (ismatch(cleandirend, p[-1]))
break;
p--;
}
#endif
#ifdef leave_leading
/* If the directory contained ONLY separators, leave as-is */
if (p == path+leaveonclean)
p = p0;
#endif
return nasm_strndup(path, p-path);
}
static int
ismatch(Node *a, Node *b)
{
if (!a && !b) return 1;
if (!a || !b) return 0;
if (a->ntyp != b->ntyp) return 0;
if (a->sym
&& b->sym
&& strcmp(a->sym->name, b->sym->name) != 0)
return 0;
if (ismatch(a->lft, b->lft)
&& ismatch(a->rgt, b->rgt))
return 1;
return 0;
}
Node *
in_cache(Node *n)
{ Cache *d; int nr=0;
for (d = stored; d; d = d->nxt, nr++)
if (isequal(d->before, n))
{ CacheHits++;
if (d->same && ismatch(n, d->before)) return n;
return dupnode(d->after);
}
return ZN;
}
int match(State *start, char *s)
{
List *clist, *nlist, *t;
clist = startlist(start, &l1);
nlist = &l2;
for (; *s; s++) {
char c = *s & 0xFF;
step(clist, c, nlist);
t = clist; clist = nlist; nlist = t;
}
return ismatch(clist);
}
/* Run DFA to determine whether it matches s. */
int
match(DState *start, char *s)
{
DState *d, *next;
int c, i;
d = start;
for(; *s; s++){
c = *s & 0xFF;
if((next = d->next[c]) == NULL)
next = nextstate(d, c);
d = next;
}
return ismatch(&d->l);
}
static const char *first_filename_char(const char *path)
{
#ifdef separators
const char *p = path + strlen(path);
while (p > path) {
if (ismatch(separators, p[-1]))
return p;
p--;
}
return p;
#else
return path;
#endif
}
int grammarAnalyze(const char* line)
{
int ret = 0;
if (line == NULL)
return -1;
int i = 0;
LinkStack *stack = NULL;
stack = LinkStack_Create();
if (stack == NULL)
return -2;
while (*(line + i) != '\0')
{
if (isalpha(line[i]))
{
i++;
continue;
}
else if (isleft(line[i]))
{
LinkStack_Push(stack, (void *)&line[i]);
}
else if (isright(line[i]))
{
char *tmp;
tmp = (char *)LinkStack_Pop(stack);
if (tmp == NULL || !ismatch(*tmp, line[i]))
{
break;
}
}
i++;
}
if (LinkStack_Size(stack) == 0 && line[i] == '\0')
{
ret = 1;
}
LinkList_Destroy(stack);
return ret;
}
Node *
cached(Node *n)
{ Cache *d;
Node *m;
if (!n) return n;
if ((m = in_cache(n)) != ZN)
return m;
Caches++;
d = (Cache *) tl_emalloc(sizeof(Cache));
d->before = dupnode(n);
d->after = Canonical(n); /* n is released */
if (ismatch(d->before, d->after))
{ d->same = 1;
releasenode(1, d->after);
d->after = d->before;
}
d->nxt = stored;
stored = d;
return dupnode(d->after);
}
void
main(int argc, char **argv)
{
char *f[10], *local, *name, *remote, *s, *t, verb;
int fd, havedb, havelocal, i, k, n, nf, resolve1, skip;
int checkedmatch1, checkedmatch2,
checkedmatch3, checkedmatch4;
ulong now;
Biobuf bin;
Dir dbd, ld, nd, rd;
Avlwalk *w;
Entry *e;
membogus(argv);
quotefmtinstall();
ARGBEGIN{
case 's':
case 'c':
i = ARGC();
addresolve(i, EARGF(usage()));
break;
case 'n':
donothing = 1;
verbose = 1;
break;
case 'S':
safeinstall = 0;
break;
case 'T':
timefile = EARGF(usage());
break;
case 't':
tempspool = 0;
break;
case 'u':
douid = 1;
break;
case 'v':
verbose++;
break;
default:
usage();
}ARGEND
if(argc < 3)
usage();
if(timefile)
readtimefile();
lroot = argv[1];
if(!isdir(lroot))
sysfatal("bad local root directory");
rroot = argv[2];
if(!isdir(rroot))
sysfatal("bad remote root directory");
match = argv+3;
nmatch = argc-3;
for(i=0; i<nmatch; i++)
if(match[i][0] == '/')
match[i]++;
if((clientdb = opendb(argv[0])) == nil)
sysfatal("opendb %q: %r", argv[2]);
copyerr = opendb(nil);
skip = 0;
Binit(&bin, 0, OREAD);
for(; s=Brdstr(&bin, '\n', 1); free(s)){
t = estrdup(s);
nf = tokenize(s, f, nelem(f));
if(nf != 10 || strlen(f[2]) != 1){
skip = 1;
fprint(2, "warning: skipping bad log entry <%s>\n", t);
free(t);
continue;
}
free(t);
now = strtoul(f[0], 0, 0);
n = atoi(f[1]);
verb = f[2][0];
name = f[3];
if(now < maxnow || (now==maxnow && n <= maxn))
continue;
local = mkname(localbuf, sizeof localbuf, lroot, name);
if(strcmp(f[4], "-") == 0)
f[4] = f[3];
remote = mkname(remotebuf, sizeof remotebuf, rroot, f[4]);
rd.name = f[4];
rd.mode = strtoul(f[5], 0, 8);
rd.uid = f[6];
rd.gid = f[7];
rd.mtime = strtoul(f[8], 0, 10);
rd.length = strtoll(f[9], 0, 10);
havedb = finddb(clientdb, name, &dbd)>=0;
havelocal = localdirstat(local, &ld)>=0;
resolve1 = resolve(name);
/*
* if(!ismatch(name)){
* skip = 1;
* continue;
* }
*
* This check used to be right here, but we want
* the time to be able to move forward past entries
* that don't match and have already been applied.
* So now every path below must checked !ismatch(name)
* before making any changes to the local file
* system. The fake variable checkedmatch
* tracks whether !ismatch(name) has been checked.
* If the compiler doesn't produce any used/set
* warnings, then all the paths should be okay.
* Even so, we have the asserts to fall back on.
*/
switch(verb){
case 'd': /* delete file */
delce(local);
if(!havelocal) /* doesn't exist; who cares? */
break;
if(access(remote, AEXIST) >= 0) /* got recreated! */
break;
if(!ismatch(name)){
skip = prstopped(skip, name);
continue;
}
SET(checkedmatch1);
if(!havedb){
if(resolve1 == 's')
goto DoRemove;
else if(resolve1 == 'c')
goto DoRemoveDb;
conflict(name, "locally created; will not remove");
skip = 1;
continue;
}
assert(havelocal && havedb);
if(dbd.mtime > rd.mtime) /* we have a newer file than what was deleted */
break;
if(samecontents(local, remote) > 0){ /* going to get recreated */
chat("= %q %luo %q %q %lud\n", name, rd.mode, rd.uid, rd.gid, rd.mtime);
break;
}
if(!(dbd.mode&DMDIR) && (dbd.mtime != ld.mtime || dbd.length != ld.length)){ /* locally modified since we downloaded it */
if(resolve1 == 's')
goto DoRemove;
else if(resolve1 == 'c')
break;
conflict(name, "locally modified; will not remove");
skip = 1;
continue;
}
DoRemove:
USED(checkedmatch1);
assert(ismatch(name));
chat("d %q %luo %q %q %lud\n", name, rd.mode, rd.uid, rd.gid, rd.mtime);
if(donothing)
break;
if(remove(local) < 0){
error("removing %q: %r", name);
skip = 1;
continue;
}
DoRemoveDb:
USED(checkedmatch1);
assert(ismatch(name));
removedb(clientdb, name);
break;
case 'a': /* add file */
if(!havedb){
if(!ismatch(name)){
skip = prstopped(skip, name);
continue;
}
SET(checkedmatch2);
if(!havelocal)
goto DoCreate;
if((ld.mode&DMDIR) && (rd.mode&DMDIR))
break;
if(samecontents(local, remote) > 0){
chat("= %q %luo %q %q %lud\n", name, rd.mode, rd.uid, rd.gid, rd.mtime);
goto DoCreateDb;
}
if(resolve1 == 's')
goto DoCreate;
else if(resolve1 == 'c')
goto DoCreateDb;
conflict(name, "locally created; will not overwrite");
skip = 1;
continue;
}
assert(havedb);
if(dbd.mtime >= rd.mtime) /* already created this file; ignore */
break;
if(havelocal){
if((ld.mode&DMDIR) && (rd.mode&DMDIR))
break;
if(!ismatch(name)){
skip = prstopped(skip, name);
continue;
}
SET(checkedmatch2);
if(samecontents(local, remote) > 0){
chat("= %q %luo %q %q %lud\n", name, rd.mode, rd.uid, rd.gid, rd.mtime);
goto DoCreateDb;
}
if(dbd.mtime==ld.mtime && dbd.length==ld.length)
goto DoCreate;
if(resolve1=='s')
goto DoCreate;
else if(resolve1 == 'c')
goto DoCreateDb;
conflict(name, "locally modified; will not overwrite");
skip = 1;
continue;
}
if(!ismatch(name)){
skip = prstopped(skip, name);
continue;
}
SET(checkedmatch2);
DoCreate:
USED(checkedmatch2);
assert(ismatch(name));
if(notexists(remote)){
addce(local);
/* no skip=1 */
break;;
}
chat("a %q %luo %q %q %lud\n", name, rd.mode, rd.uid, rd.gid, rd.mtime);
if(donothing)
break;
if(rd.mode&DMDIR){
fd = create(local, OREAD, DMDIR);
if(fd < 0 && isdir(local))
fd = open(local, OREAD);
if(fd < 0){
error("mkdir %q: %r", name);
skip = 1;
continue;
}
nulldir(&nd);
nd.mode = rd.mode;
if(dirfwstat(fd, &nd) < 0)
fprint(2, "warning: cannot set mode on %q\n", local);
nulldir(&nd);
nd.gid = rd.gid;
if(dirfwstat(fd, &nd) < 0)
fprint(2, "warning: cannot set gid on %q\n", local);
if(douid){
nulldir(&nd);
nd.uid = rd.uid;
if(dirfwstat(fd, &nd) < 0)
fprint(2, "warning: cannot set uid on %q\n", local);
}
close(fd);
rd.mtime = now;
}else{
if(copyfile(local, remote, name, &rd, 1, &k) < 0){
if(k)
addce(local);
skip = 1;
continue;
}
}
DoCreateDb:
USED(checkedmatch2);
assert(ismatch(name));
insertdb(clientdb, name, &rd);
break;
case 'c': /* change contents */
if(!havedb){
if(notexists(remote)){
addce(local);
/* no skip=1 */
break;
}
if(!ismatch(name)){
skip = prstopped(skip, name);
continue;
}
SET(checkedmatch3);
if(resolve1 == 's')
goto DoCopy;
else if(resolve1=='c')
goto DoCopyDb;
if(samecontents(local, remote) > 0){
chat("= %q %luo %q %q %lud\n", name, rd.mode, rd.uid, rd.gid, rd.mtime);
goto DoCopyDb;
}
if(havelocal)
conflict(name, "locally created; will not update");
else
conflict(name, "not replicated; will not update");
skip = 1;
continue;
}
if(dbd.mtime >= rd.mtime) /* already have/had this version; ignore */
break;
if(!ismatch(name)){
skip = prstopped(skip, name);
continue;
}
SET(checkedmatch3);
if(!havelocal){
if(notexists(remote)){
addce(local);
/* no skip=1 */
break;
}
if(resolve1 == 's')
goto DoCopy;
else if(resolve1 == 'c')
break;
conflict(name, "locally removed; will not update");
skip = 1;
continue;
}
assert(havedb && havelocal);
if(dbd.mtime != ld.mtime || dbd.length != ld.length){
if(notexists(remote)){
addce(local);
/* no skip=1 */
break;
}
if(samecontents(local, remote) > 0){
chat("= %q %luo %q %q %lud\n", name, rd.mode, rd.uid, rd.gid, rd.mtime);
goto DoCopyDb;
}
if(resolve1 == 's')
goto DoCopy;
else if(resolve1 == 'c')
goto DoCopyDb;
conflict(name, "locally modified; will not update [%llud %lud -> %llud %lud]", dbd.length, dbd.mtime, ld.length, ld.mtime);
skip = 1;
continue;
}
DoCopy:
USED(checkedmatch3);
assert(ismatch(name));
if(notexists(remote)){
addce(local);
/* no skip=1 */
break;
}
chat("c %q\n", name);
if(donothing)
break;
if(copyfile(local, remote, name, &rd, 0, &k) < 0){
if(k)
addce(local);
skip = 1;
continue;
}
DoCopyDb:
USED(checkedmatch3);
assert(ismatch(name));
if(!havedb){
if(havelocal)
dbd = ld;
else
dbd = rd;
}
dbd.mtime = rd.mtime;
dbd.length = rd.length;
insertdb(clientdb, name, &dbd);
break;
case 'm': /* change metadata */
if(!havedb){
if(notexists(remote)){
addce(local);
/* no skip=1 */
break;
}
if(!ismatch(name)){
skip = prstopped(skip, name);
continue;
}
SET(checkedmatch4);
if(resolve1 == 's'){
USED(checkedmatch4);
SET(checkedmatch2);
goto DoCreate;
}
else if(resolve1 == 'c')
goto DoMetaDb;
if(havelocal)
conflict(name, "locally created; will not update metadata");
else
conflict(name, "not replicated; will not update metadata");
skip = 1;
continue;
}
if(!(dbd.mode&DMDIR) && dbd.mtime > rd.mtime) /* have newer version; ignore */
break;
if((dbd.mode&DMDIR) && dbd.mtime > now)
break;
if(havelocal && (!douid || strcmp(ld.uid, rd.uid)==0) && strcmp(ld.gid, rd.gid)==0 && ld.mode==rd.mode)
break;
if(!havelocal){
if(notexists(remote)){
addce(local);
/* no skip=1 */
break;
}
if(!ismatch(name)){
skip = prstopped(skip, name);
continue;
}
SET(checkedmatch4);
if(resolve1 == 's'){
USED(checkedmatch4);
SET(checkedmatch2);
goto DoCreate;
}
else if(resolve1 == 'c')
break;
conflict(name, "locally removed; will not update metadata");
skip = 1;
continue;
}
if(!(dbd.mode&DMDIR) && (dbd.mtime != ld.mtime || dbd.length != ld.length)){ /* this check might be overkill */
if(notexists(remote)){
addce(local);
/* no skip=1 */
break;
}
if(!ismatch(name)){
skip = prstopped(skip, name);
continue;
}
SET(checkedmatch4);
if(resolve1 == 's' || samecontents(local, remote) > 0)
goto DoMeta;
else if(resolve1 == 'c')
break;
conflict(name, "contents locally modified (%s); will not update metadata to %s %s %luo",
dbd.mtime != ld.mtime ? "mtime" :
dbd.length != ld.length ? "length" :
"unknown",
rd.uid, rd.gid, rd.mode);
skip = 1;
continue;
}
if((douid && strcmp(ld.uid, dbd.uid)!=0) || strcmp(ld.gid, dbd.gid)!=0 || ld.mode!=dbd.mode){
if(notexists(remote)){
addce(local);
/* no skip=1 */
break;
}
if(!ismatch(name)){
skip = prstopped(skip, name);
continue;
}
SET(checkedmatch4);
if(resolve1 == 's')
goto DoMeta;
else if(resolve1 == 'c')
break;
conflict(name, "metadata locally changed; will not update metadata to %s %s %luo", rd.uid, rd.gid, rd.mode);
skip = 1;
continue;
}
if(!ismatch(name)){
skip = prstopped(skip, name);
continue;
}
SET(checkedmatch4);
DoMeta:
USED(checkedmatch4);
assert(ismatch(name));
if(notexists(remote)){
addce(local);
/* no skip=1 */
break;
}
chat("m %q %luo %q %q %lud\n", name, rd.mode, rd.uid, rd.gid, rd.mtime);
if(donothing)
break;
nulldir(&nd);
nd.gid = rd.gid;
nd.mode = rd.mode;
if(douid)
nd.uid = rd.uid;
if(dirwstat(local, &nd) < 0){
error("dirwstat %q: %r", name);
skip = 1;
continue;
}
DoMetaDb:
USED(checkedmatch4);
assert(ismatch(name));
if(!havedb){
if(havelocal)
dbd = ld;
else
dbd = rd;
}
if(dbd.mode&DMDIR)
dbd.mtime = now;
dbd.gid = rd.gid;
dbd.mode = rd.mode;
if(douid)
dbd.uid = rd.uid;
insertdb(clientdb, name, &dbd);
break;
}
if(!skip && !donothing){
maxnow = now;
maxn = n;
}
}
w = avlwalk(copyerr->avl);
while(e = (Entry*)avlnext(w))
error("copying %q: %s\n", e->name, e->d.name);
if(timefile)
writetimefile();
if(nconf)
exits("conflicts");
if(errors)
exits("errors");
exits(nil);
}
