libc

commit 8d082c0dd94ebc80a58f143e099f079bf9d5cb9c
parent 6a837b5cd9698db9a446928e665cc62d7ca68994
Author: evenfri <evenfri256@gmail.com>
Date:   Sun,  9 Aug 2026 01:52:46 +0800

fix strchr, getents

Diffstat:
M
getdents.c
 | 
7
++++++-
M
malloc.c
 | 
2
+-
M
strchr.c
 | 
2
++

3 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/getdents.c b/getdents.c
@@ -6,5 +6,10 @@
 #include "libc.h"
 
 int getdents64(int fd, struct linux_dirent64 *dirp, unsigned int count) {
-  return (int)syscall(sys_getdents64, fd, (long)dirp, count);
+  int ret = syscall(sys_getdents64, fd, (long)dirp, count);
+  if (ret < 0) { 
+    errno = -ret; 
+    return -1; 
+  }
+  return ret;
 }
diff --git a/malloc.c b/malloc.c
@@ -12,7 +12,7 @@ struct block_header {
   size_t size;
   int is_free;
   struct block_header *next;
-};
+} __attribute__((aligned(16)));
 
 typedef struct block_header block_header_t;
 
diff --git a/strchr.c b/strchr.c
@@ -12,6 +12,8 @@ char *strchr(const char *s, int c) {
   while (s[i] != 0) {
     if (s[i] == chr)
       return (char*)s + i;
+    if (s[i] == '\0') 
+      return NULL;
     i++;
   }