Initial commit: cframework. Longbow and Libparc

Change-Id: I90378dbd30da6033b20fb1f829b3b822cf366c59
Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>

1 files changed, 151 insertions, 0 deletions

diff --git a/longbow/src/LongBow/private/longBow_OpenFile.c b/longbow/src/LongBow/private/longBow_OpenFile.c
new file mode 100644
index 00000000..6b82069f
--- /dev/null
+++ b/longbow/src/LongBow/private/longBow_OpenFile.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ */
+#include <config.h>
+
+#include <stdio.h>
+#include <inttypes.h>
+#include <stdlib.h>
+#include <poll.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/param.h>
+#include <sys/resource.h>
+#include <string.h>
+
+#include <LongBow/private/longBow_OpenFile.h>
+#include <LongBow/private/longBow_Memory.h>
+#include <LongBow/private/longBow_String.h>
+
+struct longbow_openfile {
+    char *fullPathName;
+    struct stat statbuf;
+    int fd;
+};
+
+#if defined(_WIN64)
+static char *
+_getFullPathNameFromFd(int fd)
+{
+    return strdup("./");
+}
+#elif defined(_WIN32)
+static char *
+_getFullPathNameFromFd(int fd)
+{
+    return strdup("./");
+}
+#elif defined(__APPLE__)
+static char *
+_getFullPathNameFromFd(int fd)
+{
+    char filePath[PATH_MAX];
+
+    if (fcntl(fd, F_GETPATH, filePath) != -1) {
+        return strdup(filePath);
+    }
+    return NULL;
+}
+#elif defined(__linux)
+static char *
+_getFullPathNameFromFd(int fd)
+{
+    return strdup("./");
+}
+#elif defined(__unix) // all unices not caught above
+static char *
+_getFullPathNameFromFd(int fd)
+{
+    return strdup("./");
+}
+#elif defined(__posix)
+static char *
+_getFullPathNameFromFd(int fd)
+{
+    return strdup("./");
+}
+#endif
+
+LongBowOpenFile *
+longBowOpenFile_Create(int fd)
+{
+    LongBowOpenFile *result = longBowMemory_Allocate(sizeof(LongBowOpenFile));
+    if (result != NULL) {
+        result->fd = fd;
+
+        if (fstat(fd, &result->statbuf) == 0) {
+            result->fullPathName = _getFullPathNameFromFd(fd);
+        }
+    }
+    return result;
+}
+
+void
+longBowOpenFile_Destroy(LongBowOpenFile **openFilePtr)
+{
+    longBowMemory_Deallocate((void **) openFilePtr);
+}
+
+char *
+longBowOpenFile_StructStatToString(const struct stat *statbuf)
+{
+    LongBowString *string = longBowString_CreateFormat("0x%" PRIx16 " %3ld %10d %10d %6lld",
+                                                       statbuf->st_mode,
+                                                       (long) statbuf->st_nlink,
+                                                       statbuf->st_uid,
+                                                       statbuf->st_gid,
+                                                       (long long) statbuf->st_size);
+    char *result = longBowString_ToString(string);
+
+    return result;
+}
+
+char *
+longBowOpenFile_ToString(LongBowOpenFile *openFile)
+{
+    char *statString = longBowOpenFile_StructStatToString(&(openFile->statbuf));
+    LongBowString *string = longBowString_CreateFormat("%d %s %s", openFile->fd, statString, openFile->fullPathName);
+    free(statString);
+    char *result = longBowString_ToString(string);
+
+    return result;
+}
+
+LongBowArrayList *
+longBowOpenFile_CurrentlyOpen(void)
+{
+    struct rlimit rlimit;
+
+    bool success = getrlimit(RLIMIT_NOFILE, &rlimit) == 0;
+    if (!success) {
+        return NULL;
+    }
+    // Here is a potential problem:  struct rlimit specifies rlim_cur as a 64 bit value (rlim_t), but poll only takes an
+    // unsigned int's worth of file descriptors.
+
+    LongBowArrayList *list = longBowArrayList_Create(longBowArrayList_StdlibFreeFunction);
+
+    for (nfds_t i = 0; i < (nfds_t) rlimit.rlim_cur; i++) {
+        int flags = fcntl((int) i, F_GETFD);
+        if (flags != -1) {
+            LongBowOpenFile *openFile = longBowOpenFile_Create((int) i);
+            longBowArrayList_Add(list, openFile);
+        }
+    }
+
+    return list;
+}