coreutils

commit 8bfb2debce084249194437fd0c92e5be69111b73
parent 3769747bdd8693a69b921b7f72d4813756c7f568
Author: evenfri <evenfri256@gmail.com>
Date:   Tue, 11 Aug 2026 02:07:40 +0800

add mkdir

Diffstat:
A
mkdir.c
 | 
82
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
M
mkfile
 | 
1
+

2 files changed, 83 insertions(+), 0 deletions(-)
diff --git a/mkdir.c b/mkdir.c
@@ -0,0 +1,82 @@
+#include <libc.h>
+
+#define eexist 17
+
+int has_p = 0;
+
+size_t strspn(const char *s1, const char *s2) {
+  const char *p = s1, *spanp;
+  char c, sc;
+
+cont:
+  c = *p++;
+  for (spanp = s2; (sc = *spanp++) != 0;)
+    if (sc == c)
+      goto cont;
+
+  return (p - 1 - s1);
+}
+
+size_t strcspn(const char *s1, const char *s2) {
+  const char *p, *spanp;
+  char c, sc;
+
+  for (p = s1;;) {
+    c = *p++;
+    spanp = s2;
+    do {
+      if ((sc = *spanp++) == c)
+        return (p - 1 - s1);
+    } while (sc != 0);
+  }
+  return 0;
+}
+
+int main(int argc, char *argv[]) {
+  if (argc < 2) {
+    write(stdout, "using: mkdir [options] <path>\n", 30);
+    return 1;
+  }
+
+
+  for (int i = 1; i < argc; i++) {
+    if (strcmp(argv[i], "-p") == 0) {
+      has_p = 1;
+      continue;
+    }
+
+    char *path = argv[i];
+
+    if (has_p) {
+      char *slash = path;
+
+      for (;;) {
+        slash += strspn(slash, "/");
+        slash += strcspn(slash, "/");
+
+        if (*slash == '\0') {
+          if (*path != '\0') {
+            int r = mkdir(path, 0777);
+            if (r < 0 && errno != eexist)
+              return errno;
+          }
+          break;
+        }
+        *slash = '\0';
+        if (*path != '\0') {
+          int r = mkdir(path, 0777);
+          if (r < 0 && errno != eexist)
+            return errno;
+        }
+        *slash = '/';
+        slash++;
+      }
+    } else  {
+      int r = mkdir(path, 0777);
+      if (r < 0 && errno != eexist)
+        return errno;
+    }
+  }
+
+  return 0;
+}
diff --git a/mkfile b/mkfile
@@ -14,6 +14,7 @@ targ =  init \
         free \
         sh \
         touch \
+        mkdir \
 
 
 <$PLAN9/src/mkmany