elf.h: add ELFCOMPRESS_ZSTD

[musl] / src / misc / nftw.c

diff --git a/src/misc/nftw.c b/src/misc/nftw.c
index 1b94ac1..fcd25a7 100644 (file)
--- a/src/misc/nftw.c
+++ b/src/misc/nftw.c
@@ -1,13 +1,12 @@
 #include <ftw.h>
 #include <dirent.h>
+#include <fcntl.h>
 #include <sys/stat.h>
 #include <errno.h>
-#include <stdlib.h>
-#include <fcntl.h>
 #include <unistd.h>
 #include <string.h>
 #include <limits.h>
-#include "libc.h"
+#include <pthread.h>
 
 struct history
 {
@@ -28,8 +27,9 @@ static int do_nftw(char *path, int (*fn)(const char *, const struct stat *, int,
        struct history new;
        int type;
        int r;
+       int dfd;
+       int err;
        struct FTW lev;
-       char *name;
 
        if ((flags & FTW_PHYS) ? lstat(path, &st) : stat(path, &st) < 0) {
                if (!(flags & FTW_PHYS) && errno==ENOENT && !lstat(path, &st))
@@ -37,8 +37,7 @@ static int do_nftw(char *path, int (*fn)(const char *, const struct stat *, int,
                else if (errno != EACCES) return -1;
                else type = FTW_NS;
        } else if (S_ISDIR(st.st_mode)) {
-               if (access(path, R_OK) < 0) type = FTW_DNR;
-               else if (flags & FTW_DEPTH) type = FTW_DP;
+               if (flags & FTW_DEPTH) type = FTW_DP;
                else type = FTW_D;
        } else if (S_ISLNK(st.st_mode)) {
                if (flags & FTW_PHYS) type = FTW_SL;
@@ -47,18 +46,31 @@ static int do_nftw(char *path, int (*fn)(const char *, const struct stat *, int,
                type = FTW_F;
        }
 
-       if ((flags & FTW_MOUNT) && h
-        && (st.st_dev != h->dev || st.st_ino != h->ino))
+       if ((flags & FTW_MOUNT) && h && st.st_dev != h->dev)
                return 0;
        
        new.chain = h;
        new.dev = st.st_dev;
        new.ino = st.st_ino;
        new.level = h ? h->level+1 : 0;
-       new.base = l+1;
+       new.base = j+1;
        
        lev.level = new.level;
-       lev.base = h ? h->base : (name=strrchr(path, '/')) ? name-path : 0;
+       if (h) {
+               lev.base = h->base;
+       } else {
+               size_t k;
+               for (k=j; k && path[k]=='/'; k--);
+               for (; k && path[k-1]!='/'; k--);
+               lev.base = k;
+       }
+
+       if (type == FTW_D || type == FTW_DP) {
+               dfd = open(path, O_RDONLY);
+               err = errno;
+               if (dfd < 0 && err == EACCES) type = FTW_DNR;
+               if (!fd_limit) close(dfd);
+       }
 
        if (!(flags & FTW_DEPTH) && (r=fn(path, &st, type, &lev)))
                return r;
@@ -68,7 +80,11 @@ static int do_nftw(char *path, int (*fn)(const char *, const struct stat *, int,
                        return 0;
 
        if ((type == FTW_D || type == FTW_DP) && fd_limit) {
-               DIR *d = opendir(path);
+               if (dfd < 0) {
+                       errno = err;
+                       return -1;
+               }
+               DIR *d = fdopendir(dfd);
                if (d) {
                        struct dirent *de;
                        while ((de = readdir(d))) {
@@ -89,7 +105,8 @@ static int do_nftw(char *path, int (*fn)(const char *, const struct stat *, int,
                                }
                        }
                        closedir(d);
-               } else if (errno != EACCES) {
+               } else {
+                       close(dfd);
                        return -1;
                }
        }
@@ -103,6 +120,7 @@ static int do_nftw(char *path, int (*fn)(const char *, const struct stat *, int,
 
 int nftw(const char *path, int (*fn)(const char *, const struct stat *, int, struct FTW *), int fd_limit, int flags)
 {
+       int r, cs;
        size_t l;
        char pathbuf[PATH_MAX+1];
 
@@ -115,7 +133,8 @@ int nftw(const char *path, int (*fn)(const char *, const struct stat *, int, str
        }
        memcpy(pathbuf, path, l+1);
        
-       return do_nftw(pathbuf, fn, fd_limit, flags, NULL);
+       pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
+       r = do_nftw(pathbuf, fn, fd_limit, flags, NULL);
+       pthread_setcancelstate(cs, 0);
+       return r;
 }
-
-LFS64(nftw);