Changeset 75406dc in mainline for uspace/lib/posix/unistd.c

Timestamp:

2011-07-28T17:39:51Z (14 years ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

955c2b0

Parents:

58115ae

Message:

Additional wrappers and fixes for VFS functions.

File:

• uspace/lib/posix/unistd.c (modified) (6 diffs)

uspace/lib/posix/unistd.c

@@ -111 +111 @@
         }
         char *ret = getcwd(buf, size);
-        if (ret == NULL && errno == EOK) {
+        if (ret == NULL) {
                 errno = ERANGE;
         }
         return ret;
+}
+
+/**
+ * Change the current working directory.
+ *
+ * @param path New working directory.
+ */
+int posix_chdir(const char *path)
+{
+        return errnify(chdir, path);
 }
 
@@ -157 +167 @@
         /* There is currently no support for user accounts in HelenOS. */
         return 0;
+}
+
+/**
+ * Close a file.
+ *
+ * @param fildes
+ * @return 0 on success, -1 on error.
+ */
+int posix_close(int fildes)
+{
+        return errnify(close, fildes);
 }
 
@@ -169 +190 @@
 ssize_t posix_read(int fildes, void *buf, size_t nbyte)
 {
-        int rc = read(fildes, buf, nbyte);
-        if (rc < 0) {
-                errno = -rc;
-                return -1;
-        } else {
-                return rc;
-        }
+        return errnify(read, fildes, buf, nbyte);
+}
+
+/**
+ * Write to a file.
+ *
+ * @param fildes File descriptor of the opened file.
+ * @param buf Buffer to write.
+ * @param nbyte Size of the buffer.
+ * @return Number of written bytes on success, -1 otherwise.
+ */
+ssize_t posix_write(int fildes, const void *buf, size_t nbyte)
+{
+        return errnify(write, fildes, buf, nbyte);
+}
+
+/**
+ * Requests outstanding data to be written to the underlying storage device.
+ *
+ * @param fildes
+ */
+int posix_fsync(int fildes)
+{
+        return errnify(fsync, fildes);
+}
+
+int posix_ftruncate(int fildes, posix_off_t length)
+{
+        return errnify(ftruncate, fildes, (aoff64_t) length);
 }
 
@@ -186 +229 @@
 int posix_rmdir(const char *path)
 {
-        int rc = rmdir(path);
-        if (rc != EOK) {
-                errno = -rc;
-                return -1;
-        }
-        return 0;
+        return errnify(rmdir, path);
 }
 
@@ -202 +240 @@
 int posix_unlink(const char *path)
 {
-        int rc = unlink(path);
-        if (rc < 0) {
-                errno = -rc;
-                return -1;
-        } else {
-                return rc;
-        }
+        return errnify(unlink, path);
+}
+
+int posix_dup(int fildes)
+{
+        return posix_fcntl(fildes, F_DUPFD, 0);
+}
+
+int posix_dup2(int fildes, int fildes2)
+{
+        return errnify(dup2, fildes, fildes2);
 }
 
@@ -220 +262 @@
 int posix_access(const char *path, int amode)
 {
-        if (amode == F_OK) {
-                /* Check file existence by attempt to open it. */
+        if (amode == F_OK || (amode & (X_OK | W_OK | R_OK))) {
+                /* HelenOS doesn't support permissions, permission checks
+                 * are equal to existence check.
+                 *
+                 * Check file existence by attempting to open it.
+                 */
                 int fd = open(path, O_RDONLY);
-                if (fd != -1) {
-                        close(fd);
+                if (fd < 0) {
+                        errno = -fd;
+                        return 0;
                 }
-                return fd;
-        } else if (amode & (X_OK | W_OK | R_OK)) {
-                /* HelenOS doesn't support permissions, return success. */
-                return 0;
+                close(fd);
+                return 1;
         } else {
                 /* Invalid amode argument. */