WebSVN – HelenOS – Diff – /trunk/uspace/lib/libc/generic/vfs/vfs.c

  * @{
  */
 /** @file
  */
-#include <vfs.h>
+#include <vfs/vfs.h>
+#include <vfs/canonify.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <dirent.h>
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <errno.h>
 #include <string.h>
 #include "../../srv/vfs/vfs.h"
 int vfs_phone = -1;
-atomic_t vfs_phone_futex = FUTEX_INITIALIZER;
+futex_t vfs_phone_futex = FUTEX_INITIALIZER;
+futex_t cwd_futex = FUTEX_INITIALIZER;
+DIR *cwd_dir = NULL;
+char *cwd_path = NULL;
+size_t cwd_len = 0;
+static char *absolutize(const char *path)
+{
+    char *ncwd_path;
+    futex_down(&cwd_futex);
+    size_t len = strlen(path);
+    if (*path != '/') {
+        if (!cwd_path) {
+            futex_up(&cwd_futex);
+            return NULL;
+        }
+        ncwd_path = malloc(len + cwd_len + 1);
+        if (!ncwd_path) {
+            futex_up(&cwd_futex);
+            return NULL;
+        }
+        strcpy(ncwd_path, cwd_path);
+        ncwd_path[cwd_len] = '/';
+        ncwd_path[cwd_len + 1] = '\0';
+    } else {
+        ncwd_path = malloc(len + 1);
+        if (!ncwd_path) {
+            futex_up(&cwd_futex);
+            return NULL;
+        }
+        ncwd_path[0] = '\0';
+    }
+    strcat(ncwd_path, path);
+    futex_up(&cwd_futex);
+    return ncwd_path;
+}
 static int vfs_connect(void)
+{
     if (vfs_phone < 0)
         vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);
     ipcarg_t rc;
     aid_t req;
     int dev_handle = 0; /* TODO */
+    char *mpa = absolutize(mp);
+    if (!mpa)
+        return ENOMEM;
+    size_t mpc_len;
+    char *mpc = canonify(mpa, &mpc_len);
+    if (!mpc) {
+        free(mpa);
+        return EINVAL;
+    }
     futex_down(&vfs_phone_futex);
     async_serialize_start();
     if (vfs_phone < 0) {
         res = vfs_connect();
         if (res < 0) {
             async_serialize_end();
             futex_up(&vfs_phone_futex);
+            free(mpa);
             return res;
+        }
+    }
     req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);
     rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));
     if (rc != EOK) {
         async_wait_for(req, NULL);
         async_serialize_end();
         futex_up(&vfs_phone_futex);
+        free(mpa);
         return (int) rc;
+    }
-    rc = ipc_data_write_start(vfs_phone, (void *)mp, strlen(mp));
+    rc = ipc_data_write_start(vfs_phone, (void *)mpc, mpc_len);
     if (rc != EOK) {
         async_wait_for(req, NULL);
         async_serialize_end();
         futex_up(&vfs_phone_futex);
+        free(mpa);
         return (int) rc;
+    }
     async_wait_for(req, &rc);
     async_serialize_end();
     futex_up(&vfs_phone_futex);
+    free(mpa);
     return (int) rc;
+}
 static int _open(const char *path, int lflag, int oflag, ...)
+{
     int res;
     ipcarg_t rc;
     ipc_call_t answer;
     aid_t req;
+    char *pa = absolutize(path);
+    if (!pa)
+        return ENOMEM;
+    size_t pc_len;
+    char *pc = canonify(pa, &pc_len);
+    if (!pc) {
+        free(pa);
+        return EINVAL;
+    }
     futex_down(&vfs_phone_futex);
     async_serialize_start();
     if (vfs_phone < 0) {
         res = vfs_connect();
         if (res < 0) {
             async_serialize_end();
             futex_up(&vfs_phone_futex);
+            free(pa);
             return res;
+        }
+    }
     req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
-    rc = ipc_data_write_start(vfs_phone, path, strlen(path));
+    rc = ipc_data_write_start(vfs_phone, pc, pc_len);
     if (rc != EOK) {
         async_wait_for(req, NULL);
         async_serialize_end();
         futex_up(&vfs_phone_futex);
+        free(pa);
         return (int) rc;
+    }
     async_wait_for(req, &rc);
     async_serialize_end();
     futex_up(&vfs_phone_futex);
+    free(pa);
     return (int) IPC_GET_ARG1(answer);
+}
 int open(const char *path, int oflag, ...)
+{
+{
     int res;
     ipcarg_t rc;
     aid_t req;
+    char *pa = absolutize(path);
+    if (!pa)
+        return ENOMEM;
+    size_t pc_len;
+    char *pc = canonify(pa, &pc_len);
+    if (!pc) {
+        free(pa);
+        return EINVAL;
+    }
     futex_down(&vfs_phone_futex);
     async_serialize_start();
     if (vfs_phone < 0) {
         res = vfs_connect();
         if (res < 0) {
             async_serialize_end();
             futex_up(&vfs_phone_futex);
+            free(pa);
             return res;
+        }
+    }
     req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
-    rc = ipc_data_write_start(vfs_phone, path, strlen(path));
+    rc = ipc_data_write_start(vfs_phone, pc, pc_len);
     if (rc != EOK) {
         async_wait_for(req, NULL);
         async_serialize_end();
         futex_up(&vfs_phone_futex);
+        free(pa);
         return (int) rc;
+    }
     async_wait_for(req, &rc);
     async_serialize_end();
     futex_up(&vfs_phone_futex);
+    free(pa);
     return EOK;
+}
 static int _unlink(const char *path, int lflag)
+{
     int res;
     ipcarg_t rc;
     aid_t req;
+    char *pa = absolutize(path);
+    if (!pa)
+        return ENOMEM;
+    size_t pc_len;
+    char *pc = canonify(pa, &pc_len);
+    if (!pc) {
+        free(pa);
+        return EINVAL;
+    }
     futex_down(&vfs_phone_futex);
     async_serialize_start();
     if (vfs_phone < 0) {
         res = vfs_connect();
         if (res < 0) {
             async_serialize_end();
             futex_up(&vfs_phone_futex);
+            free(pa);
             return res;
+        }
+    }
     req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
-    rc = ipc_data_write_start(vfs_phone, path, strlen(path));
+    rc = ipc_data_write_start(vfs_phone, pc, pc_len);
     if (rc != EOK) {
         async_wait_for(req, NULL);
         async_serialize_end();
         futex_up(&vfs_phone_futex);
+        free(pa);
         return (int) rc;
+    }
     async_wait_for(req, &rc);
     async_serialize_end();
     futex_up(&vfs_phone_futex);
+    free(pa);
     return EOK;
+}
 int unlink(const char *path)
+{
 int rmdir(const char *path)
+{
     return _unlink(path, L_DIRECTORY);
+}
+int chdir(const char *path)
+{
+    char *pa = absolutize(path);
+    if (!pa)
+        return ENOMEM;
+    size_t pc_len;
+    char *pc = canonify(pa, &pc_len);
+    if (!pc) {
+        free(pa);
+        return ENOENT;
+    }
+    DIR *d = opendir(pc);
+    if (!d) {
+        free(pa);
+        return ENOENT;
+    }
+    futex_down(&cwd_futex);
+    if (cwd_dir) {
+        closedir(cwd_dir);
+        cwd_dir = NULL;
+        free(cwd_path);
+        cwd_path = NULL;
+        cwd_len = 0;
+    }
+    cwd_dir = d;
+    cwd_path = pc;
+    cwd_len = pc_len;
+    futex_up(&cwd_futex);
+}
+char *getcwd(char *buf, size_t size)
+{
+    if (!size)
+        return NULL;
+    futex_down(&cwd_futex);
+    if (size < cwd_len + 1) {
+        futex_up(&cwd_futex);
+        return NULL;
+    }
+    strcpy(buf, cwd_path);
+    futex_up(&cwd_futex);
+    return buf;
+}
 /** @}
  */

Subversion Repositories HelenOS

(root)/trunk/uspace/lib/libc/generic/vfs/vfs.c – Rev 2753 → 2755