#include <sys/param.h>
#include <sys/stat.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <fts.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static FTSENT *fts_alloc(FTS *, char *, int);
static FTSENT *fts_build(FTS *, int);
static void fts_lfree(FTSENT *);
static void fts_load(FTS *, FTSENT *);
static size_t fts_maxarglen(char * const *);
static void fts_padjust(FTS *, void *);
static int fts_palloc(FTS *, size_t);
static FTSENT *fts_sort(FTS *, FTSENT *, int);
static u_short fts_stat(FTS *, FTSENT *, int);
#define ISDOT(a) (a[0] == '.' && (!a[1] || a[1] == '.' && !a[2]))
#define ISSET(opt) (sp->fts_options & opt)
#define SET(opt) (sp->fts_options |= opt)
#define CHDIR(sp, path) (!ISSET(FTS_NOCHDIR) && chdir(path))
#define FCHDIR(sp, fd) (!ISSET(FTS_NOCHDIR) && fchdir(fd))
#define BCHILD 1
#define BNAMES 2
#define BREAD 3
FTS *
fts_open(argv, options, compar)
char * const *argv;
register int options;
int (*compar)();
{
register FTS *sp;
register FTSENT *p, *root;
register int nitems;
FTSENT *parent, *tmp;
int len;
if (options & ~FTS_OPTIONMASK) {
errno = EINVAL;
return (NULL);
}
if ((sp = malloc((u_int)sizeof(FTS))) == NULL)
return (NULL);
memset(sp, 0, sizeof(FTS));
sp->fts_compar = compar;
sp->fts_options = options;
if (ISSET(FTS_LOGICAL))
SET(FTS_NOCHDIR);
if (fts_palloc(sp, MAX(fts_maxarglen(argv), MAXPATHLEN)))
goto mem1;
if ((parent = fts_alloc(sp, "", 0)) == NULL)
goto mem2;
parent->fts_level = FTS_ROOTPARENTLEVEL;
for (root = NULL, nitems = 0; *argv; ++argv, ++nitems) {
if ((len = strlen(*argv)) == 0) {
errno = ENOENT;
goto mem3;
}
p = fts_alloc(sp, *argv, len);
p->fts_level = FTS_ROOTLEVEL;
p->fts_parent = parent;
p->fts_accpath = p->fts_name;
p->fts_info = fts_stat(sp, p, ISSET(FTS_COMFOLLOW));
if (p->fts_info == FTS_DOT)
p->fts_info = FTS_D;
if (compar) {
p->fts_link = root;
root = p;
} else {
p->fts_link = NULL;
if (root == NULL)
tmp = root = p;
else {
tmp->fts_link = p;
tmp = p;
}
}
}
if (compar && nitems > 1)
root = fts_sort(sp, root, nitems);
if ((sp->fts_cur = fts_alloc(sp, "", 0)) == NULL)
goto mem3;
sp->fts_cur->fts_link = root;
sp->fts_cur->fts_info = FTS_INIT;
if (!ISSET(FTS_NOCHDIR) && (sp->fts_rfd = open(".", O_RDONLY, 0)) < 0)
SET(FTS_NOCHDIR);
return (sp);
mem3: fts_lfree(root);
free(parent);
mem2: free(sp->fts_path);
mem1: free(sp);
return (NULL);
}
static void
fts_load(sp, p)
FTS *sp;
register FTSENT *p;
{
register int len;
register char *cp;
len = p->fts_pathlen = p->fts_namelen;
memmove(sp->fts_path, p->fts_name, len + 1);
if ((cp = strrchr(p->fts_name, '/')) && (cp != p->fts_name || cp[1])) {
len = strlen(++cp);
memmove(p->fts_name, cp, len + 1);
p->fts_namelen = len;
}
p->fts_accpath = p->fts_path = sp->fts_path;
sp->fts_dev = p->fts_dev;
}
int
fts_close(sp)
FTS *sp;
{
register FTSENT *freep, *p;
int saved_errno = 0;
if (sp->fts_cur) {
for (p = sp->fts_cur; p->fts_level >= FTS_ROOTLEVEL;) {
freep = p;
p = p->fts_link ? p->fts_link : p->fts_parent;
free(freep);
}
free(p);
}
if (sp->fts_child)
fts_lfree(sp->fts_child);
if (sp->fts_array)
free(sp->fts_array);
free(sp->fts_path);
if (!ISSET(FTS_NOCHDIR)) {
if (fchdir(sp->fts_rfd)) {
saved_errno = errno;
}
(void)close(sp->fts_rfd);
}
free(sp);
if (saved_errno) {
errno = saved_errno;
return (-1);
}
return (0);
}
#define NAPPEND(p) \
(p->fts_level == FTS_ROOTLEVEL && p->fts_pathlen == 1 && \
p->fts_path[0] == '/' ? 0 : p->fts_pathlen)
FTSENT *
fts_read(sp)
register FTS *sp;
{
register FTSENT *p, *tmp;
register int instr;
register char *t;
int saved_errno;
if (sp->fts_cur == NULL || ISSET(FTS_STOP))
return (NULL);
p = sp->fts_cur;
instr = p->fts_instr;
p->fts_instr = FTS_NOINSTR;
if (instr == FTS_AGAIN) {
p->fts_info = fts_stat(sp, p, 0);
return (p);
}
if (instr == FTS_FOLLOW &&
(p->fts_info == FTS_SL || p->fts_info == FTS_SLNONE)) {
p->fts_info = fts_stat(sp, p, 1);
if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR))
if ((p->fts_symfd = open(".", O_RDONLY, 0)) < 0) {
p->fts_errno = errno;
p->fts_info = FTS_ERR;
} else
p->fts_flags |= FTS_SYMFOLLOW;
return (p);
}
if (p->fts_info == FTS_D) {
if (instr == FTS_SKIP ||
ISSET(FTS_XDEV) && p->fts_dev != sp->fts_dev) {
if (p->fts_flags & FTS_SYMFOLLOW)
(void)close(p->fts_symfd);
if (sp->fts_child) {
fts_lfree(sp->fts_child);
sp->fts_child = NULL;
}
p->fts_info = FTS_DP;
return (p);
}
if (sp->fts_child && sp->fts_options & FTS_NAMEONLY) {
sp->fts_options &= ~FTS_NAMEONLY;
fts_lfree(sp->fts_child);
sp->fts_child = NULL;
}
if (sp->fts_child) {
if (CHDIR(sp, p->fts_accpath)) {
p->fts_errno = errno;
p->fts_flags |= FTS_DONTCHDIR;
for (p = sp->fts_child; p; p = p->fts_link)
p->fts_accpath =
p->fts_parent->fts_accpath;
}
} else if ((sp->fts_child = fts_build(sp, BREAD)) == NULL) {
if (ISSET(FTS_STOP))
return (NULL);
return (p);
}
p = sp->fts_child;
sp->fts_child = NULL;
goto name;
}
next: tmp = p;
if (p = p->fts_link) {
free(tmp);
if (p->fts_level == FTS_ROOTLEVEL) {
if (!ISSET(FTS_NOCHDIR) && FCHDIR(sp, sp->fts_rfd)) {
SET(FTS_STOP);
return (NULL);
}
fts_load(sp, p);
return (sp->fts_cur = p);
}
if (p->fts_instr == FTS_SKIP)
goto next;
if (p->fts_instr == FTS_FOLLOW) {
p->fts_info = fts_stat(sp, p, 1);
if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR))
if ((p->fts_symfd =
open(".", O_RDONLY, 0)) < 0) {
p->fts_errno = errno;
p->fts_info = FTS_ERR;
} else
p->fts_flags |= FTS_SYMFOLLOW;
p->fts_instr = FTS_NOINSTR;
}
name: t = sp->fts_path + NAPPEND(p->fts_parent);
*t++ = '/';
memmove(t, p->fts_name, p->fts_namelen + 1);
return (sp->fts_cur = p);
}
p = tmp->fts_parent;
free(tmp);
if (p->fts_level == FTS_ROOTPARENTLEVEL) {
free(p);
errno = 0;
return (sp->fts_cur = NULL);
}
sp->fts_path[p->fts_pathlen] = '\0';
if (p->fts_level == FTS_ROOTLEVEL) {
if (!ISSET(FTS_NOCHDIR) && FCHDIR(sp, sp->fts_rfd)) {
SET(FTS_STOP);
return (NULL);
}
} else if (p->fts_flags & FTS_SYMFOLLOW) {
if (FCHDIR(sp, p->fts_symfd)) {
saved_errno = errno;
(void)close(p->fts_symfd);
errno = saved_errno;
SET(FTS_STOP);
return (NULL);
}
(void)close(p->fts_symfd);
} else if (!(p->fts_flags & FTS_DONTCHDIR)) {
if (CHDIR(sp, "..")) {
SET(FTS_STOP);
return (NULL);
}
}
p->fts_info = p->fts_errno ? FTS_ERR : FTS_DP;
return (sp->fts_cur = p);
}
int
fts_set(sp, p, instr)
FTS *sp;
FTSENT *p;
int instr;
{
if (instr && instr != FTS_AGAIN && instr != FTS_FOLLOW &&
instr != FTS_NOINSTR && instr != FTS_SKIP) {
errno = EINVAL;
return (1);
}
p->fts_instr = instr;
return (0);
}
FTSENT *
fts_children(sp, instr)
register FTS *sp;
int instr;
{
register FTSENT *p;
int fd;
if (instr && instr != FTS_NAMEONLY) {
errno = EINVAL;
return (NULL);
}
p = sp->fts_cur;
errno = 0;
if (ISSET(FTS_STOP))
return (NULL);
if (p->fts_info == FTS_INIT)
return (p->fts_link);
if (p->fts_info != FTS_D )
return (NULL);
if (sp->fts_child)
fts_lfree(sp->fts_child);
if (instr == FTS_NAMEONLY) {
sp->fts_options |= FTS_NAMEONLY;
instr = BNAMES;
} else
instr = BCHILD;
if (p->fts_level != FTS_ROOTLEVEL || p->fts_accpath[0] == '/' ||
ISSET(FTS_NOCHDIR))
return (sp->fts_child = fts_build(sp, instr));
if ((fd = open(".", O_RDONLY, 0)) < 0)
return (NULL);
sp->fts_child = fts_build(sp, instr);
if (fchdir(fd))
return (NULL);
(void)close(fd);
return (sp->fts_child);
}
static FTSENT *
fts_build(sp, type)
register FTS *sp;
int type;
{
register struct dirent *dp;
register FTSENT *p, *head;
register int nitems;
FTSENT *cur, *tail;
DIR *dirp;
void *adjaddr;
int cderrno, descend, len, level, maxlen, nlinks, oflag, saved_errno;
char *cp;
cur = sp->fts_cur;
#ifdef FTS_WHITEOUT
if (ISSET(FTS_WHITEOUT))
oflag = DTF_NODUP|DTF_REWIND;
else
oflag = DTF_HIDEW|DTF_NODUP|DTF_REWIND;
#else
#define __opendir2(path, flag) opendir(path)
#endif
if ((dirp = __opendir2(cur->fts_accpath, oflag)) == NULL) {
if (type == BREAD) {
cur->fts_info = FTS_DNR;
cur->fts_errno = errno;
}
return (NULL);
}
if (type == BNAMES)
nlinks = 0;
else if (ISSET(FTS_NOSTAT) && ISSET(FTS_PHYSICAL))
nlinks = cur->fts_nlink - (ISSET(FTS_SEEDOT) ? 0 : 2);
else
nlinks = -1;
#ifdef notdef
(void)printf("nlinks == %d (cur: %d)\n", nlinks, cur->fts_nlink);
(void)printf("NOSTAT %d PHYSICAL %d SEEDOT %d\n",
ISSET(FTS_NOSTAT), ISSET(FTS_PHYSICAL), ISSET(FTS_SEEDOT));
#endif
cderrno = 0;
if (nlinks || type == BREAD)
if (FCHDIR(sp, dirfd(dirp))) {
if (nlinks && type == BREAD)
cur->fts_errno = errno;
cur->fts_flags |= FTS_DONTCHDIR;
descend = 0;
cderrno = errno;
} else
descend = 1;
else
descend = 0;
maxlen = sp->fts_pathlen - cur->fts_pathlen - 1;
len = NAPPEND(cur);
if (ISSET(FTS_NOCHDIR)) {
cp = sp->fts_path + len;
*cp++ = '/';
}
level = cur->fts_level + 1;
adjaddr = NULL;
for (head = tail = NULL, nitems = 0; dp = readdir(dirp);) {
if (!ISSET(FTS_SEEDOT) && ISDOT(dp->d_name))
continue;
if ((p = fts_alloc(sp, dp->d_name, (int)dp->d_namlen)) == NULL)
goto mem1;
if (dp->d_namlen > maxlen) {
if (fts_palloc(sp, (size_t)dp->d_namlen)) {
mem1: saved_errno = errno;
if (p)
free(p);
fts_lfree(head);
(void)closedir(dirp);
errno = saved_errno;
cur->fts_info = FTS_ERR;
SET(FTS_STOP);
return (NULL);
}
adjaddr = sp->fts_path;
maxlen = sp->fts_pathlen - sp->fts_cur->fts_pathlen - 1;
}
p->fts_pathlen = len + dp->d_namlen + 1;
p->fts_parent = sp->fts_cur;
p->fts_level = level;
#ifdef FTS_WHITEOUT
if (dp->d_type == DT_WHT)
p->fts_flags |= FTS_ISW;
#endif
if (cderrno) {
if (nlinks) {
p->fts_info = FTS_NS;
p->fts_errno = cderrno;
} else
p->fts_info = FTS_NSOK;
p->fts_accpath = cur->fts_accpath;
} else if (nlinks == 0
#ifdef DT_DIR
|| nlinks > 0 &&
dp->d_type != DT_DIR && dp->d_type != DT_UNKNOWN
#endif
) {
p->fts_accpath =
ISSET(FTS_NOCHDIR) ? p->fts_path : p->fts_name;
p->fts_info = FTS_NSOK;
} else {
if (ISSET(FTS_NOCHDIR)) {
p->fts_accpath = p->fts_path;
memmove(cp, p->fts_name, p->fts_namelen + 1);
} else
p->fts_accpath = p->fts_name;
p->fts_info = fts_stat(sp, p, 0);
if (nlinks > 0 && (p->fts_info == FTS_D ||
p->fts_info == FTS_DC || p->fts_info == FTS_DOT))
--nlinks;
}
p->fts_link = NULL;
if (head == NULL)
head = tail = p;
else {
tail->fts_link = p;
tail = p;
}
++nitems;
}
(void)closedir(dirp);
if (adjaddr)
fts_padjust(sp, adjaddr);
if (ISSET(FTS_NOCHDIR)) {
if (cp - 1 > sp->fts_path)
--cp;
*cp = '\0';
}
if (descend && (type == BCHILD || !nitems) &&
(cur->fts_level == FTS_ROOTLEVEL ?
FCHDIR(sp, sp->fts_rfd) : CHDIR(sp, ".."))) {
cur->fts_info = FTS_ERR;
SET(FTS_STOP);
return (NULL);
}
if (!nitems) {
if (type == BREAD)
cur->fts_info = FTS_DP;
return (NULL);
}
if (sp->fts_compar && nitems > 1)
head = fts_sort(sp, head, nitems);
return (head);
}
static u_short
fts_stat(sp, p, follow)
FTS *sp;
register FTSENT *p;
int follow;
{
register FTSENT *t;
register dev_t dev;
register ino_t ino;
struct stat *sbp, sb;
int saved_errno;
sbp = ISSET(FTS_NOSTAT) ? &sb : p->fts_statp;
#ifdef FTS_WHITEOUT
if (p->fts_flags & FTS_ISW) {
if (sbp != &sb) {
memset(sbp, '\0', sizeof (*sbp));
sbp->st_mode = S_IFWHT;
}
return (FTS_W);
}
#endif
if (ISSET(FTS_LOGICAL) || follow) {
if (stat(p->fts_accpath, sbp)) {
saved_errno = errno;
if (!lstat(p->fts_accpath, sbp)) {
errno = 0;
return (FTS_SLNONE);
}
p->fts_errno = saved_errno;
goto err;
}
} else if (lstat(p->fts_accpath, sbp)) {
p->fts_errno = errno;
err: memset(sbp, 0, sizeof(struct stat));
return (FTS_NS);
}
if (S_ISDIR(sbp->st_mode)) {
dev = p->fts_dev = sbp->st_dev;
ino = p->fts_ino = sbp->st_ino;
p->fts_nlink = sbp->st_nlink;
if (ISDOT(p->fts_name))
return (FTS_DOT);
for (t = p->fts_parent;
t->fts_level >= FTS_ROOTLEVEL; t = t->fts_parent)
if (ino == t->fts_ino && dev == t->fts_dev) {
p->fts_cycle = t;
return (FTS_DC);
}
return (FTS_D);
}
if (S_ISLNK(sbp->st_mode))
return (FTS_SL);
if (S_ISREG(sbp->st_mode))
return (FTS_F);
return (FTS_DEFAULT);
}
static FTSENT *
fts_sort(sp, head, nitems)
FTS *sp;
FTSENT *head;
register int nitems;
{
register FTSENT **ap, *p;
if (nitems > sp->fts_nitems) {
sp->fts_nitems = nitems + 40;
if ((sp->fts_array = realloc(sp->fts_array,
(size_t)(sp->fts_nitems * sizeof(FTSENT *)))) == NULL) {
sp->fts_nitems = 0;
return (head);
}
}
for (ap = sp->fts_array, p = head; p; p = p->fts_link)
*ap++ = p;
qsort((void *)sp->fts_array, nitems, sizeof(FTSENT *), sp->fts_compar);
for (head = *(ap = sp->fts_array); --nitems; ++ap)
ap[0]->fts_link = ap[1];
ap[0]->fts_link = NULL;
return (head);
}
static FTSENT *
fts_alloc(sp, name, namelen)
FTS *sp;
char *name;
register int namelen;
{
register FTSENT *p;
size_t len;
len = sizeof(FTSENT) + namelen;
if (!ISSET(FTS_NOSTAT))
len += sizeof(struct stat) + ALIGNBYTES;
if ((p = malloc(len)) == NULL)
return (NULL);
memmove(p->fts_name, name, namelen + 1);
if (!ISSET(FTS_NOSTAT))
p->fts_statp = (struct stat *)ALIGN(p->fts_name + namelen + 2);
p->fts_namelen = namelen;
p->fts_path = sp->fts_path;
p->fts_errno = 0;
p->fts_flags = 0;
p->fts_instr = FTS_NOINSTR;
p->fts_number = 0;
p->fts_pointer = NULL;
return (p);
}
static void
fts_lfree(head)
register FTSENT *head;
{
register FTSENT *p;
while (p = head) {
head = head->fts_link;
free(p);
}
}
static int
fts_palloc(sp, more)
FTS *sp;
size_t more;
{
sp->fts_pathlen += more + 256;
sp->fts_path = realloc(sp->fts_path, (size_t)sp->fts_pathlen);
return (sp->fts_path == NULL);
}
static void
fts_padjust(sp, addr)
FTS *sp;
void *addr;
{
FTSENT *p;
#define ADJUST(p) { \
(p)->fts_accpath = \
(char *)addr + ((p)->fts_accpath - (p)->fts_path); \
(p)->fts_path = addr; \
}
for (p = sp->fts_child; p; p = p->fts_link)
ADJUST(p);
for (p = sp->fts_cur; p->fts_level >= FTS_ROOTLEVEL;) {
ADJUST(p);
p = p->fts_link ? p->fts_link : p->fts_parent;
}
}
static size_t
fts_maxarglen(argv)
char * const *argv;
{
size_t len, max;
for (max = 0; *argv; ++argv)
if ((len = strlen(*argv)) > max)
max = len;
return (max);
}