From 67bd0be1a4ed817954c9dcededf9bd9cb8c2f431 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Sun, 11 Oct 2020 02:59:54 -0500
Subject: toysh: more variable/wildcard plumbing and tests.

---
 lib/dirtree.c | 13 ++++++++-----
 lib/lib.c     | 19 +++++++++++++++++++
 lib/lib.h     |  5 +++--
 3 files changed, 30 insertions(+), 7 deletions(-)

(limited to 'lib')

diff --git a/lib/dirtree.c b/lib/dirtree.c
index 2bd7c404..70b567d2 100644
--- a/lib/dirtree.c
+++ b/lib/dirtree.c
@@ -53,12 +53,13 @@ struct dirtree *dirtree_add_node(struct dirtree *parent, char *name, int flags)
 
   // Allocate/populate return structure
   dt = xmalloc((len = sizeof(struct dirtree)+len+1)+linklen);
-  memset(dt, 0, statless ? offsetof(struct dirtree, again)
+  memset(dt, 0, statless ? sizeof(struct dirtree)+1
     : offsetof(struct dirtree, st));
   dt->parent = parent;
   dt->again = statless ? 2 : 0;
   if (!statless) memcpy(&dt->st, &st, sizeof(struct stat));
-  strcpy(dt->name, name ? name : "");
+  if (name) strcpy(dt->name, name);
+  else dt->st.st_mode = S_IFDIR;
   if (linklen) dt->symlink = memcpy(len+(char *)dt, libbuf, linklen);
 
   return dt;
@@ -142,10 +143,12 @@ int dirtree_recurse(struct dirtree *node,
 {
   struct dirtree *new, **ddt = &(node->child);
   struct dirent *entry;
-  DIR *dir;
+  DIR *dir = 0;
 
-  node->dirfd = dirfd;
-  if (node->dirfd == -1 || !(dir = fdopendir(node->dirfd))) {
+  // Why doesn't fdopendir() support AT_FDCWD?
+  if (AT_FDCWD == (node->dirfd = dirfd)) dir = opendir(".");
+  else if (node->dirfd != -1) dir = fdopendir(node->dirfd);
+  if (!dir) {
     if (!(flags & DIRTREE_SHUTUP)) {
       char *path = dirtree_path(node, 0);
       perror_msg_raw(path);
diff --git a/lib/lib.c b/lib/lib.c
index 752fd0a1..c4e70dfe 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -346,6 +346,25 @@ int stridx(char *haystack, char needle)
   return off-haystack;
 }
 
+// Convert wc to utf8, returning bytes written. Does not null terminate.
+int wctoutf8(char *s, unsigned wc)
+{
+  int len = (wc>0x7ff)+(wc>0xffff), mask = 12+len+!!len;
+
+  if (wc<128) {
+    *s = wc;
+    return 1;
+  } else {
+    do {
+      s[1+len] = 0x80+(wc&0x3f);
+      wc >>= 7;
+    } while (len--);
+    *s = wc|mask;
+  }
+
+  return 2+len;
+}
+
 // Convert utf8 sequence to a unicode wide character
 // returns bytes consumed, or -1 if err, or -2 if need more data.
 int utf8towc(wchar_t *wc, char *str, unsigned len)
diff --git a/lib/lib.h b/lib/lib.h
index db851631..6851c4aa 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -74,11 +74,11 @@ void get_optflags(void);
 // Don't warn about failure to stat
 #define DIRTREE_SHUTUP      16
 // Breadth first traversal, conserves filehandles at the expense of memory
-#define DIRTREE_BREADTH     32
+#define DIRTREE_BREADTH     32 // TODO not implemented yet
 // skip non-numeric entries
 #define DIRTREE_PROC        64
 // Return files we can't stat
-#define DIRTREE_STATLESS    128
+#define DIRTREE_STATLESS   128
 // Don't look at any more files in this directory.
 #define DIRTREE_ABORT      256
 
@@ -229,6 +229,7 @@ long long xstrtol(char *str, char **end, int base);
 long long atolx(char *c);
 long long atolx_range(char *numstr, long long low, long long high);
 int stridx(char *haystack, char needle);
+int wctoutf8(char *s, unsigned wc);
 int utf8towc(wchar_t *wc, char *str, unsigned len);
 char *strlower(char *s);
 char *strafter(char *haystack, char *needle);
-- 
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