Extend basic support for serializing simple data types.

[cumulus.git] / scandir.cc

diff --git a/scandir.cc b/scandir.cc
index 4b8f27f..d0f76d1 100644 (file)
--- a/scandir.cc
+++ b/scandir.cc
@@ -14,11 +14,21 @@
 #include <string>
 #include <vector>
 
+#include "store.h"
+
 using std::string;
 using std::vector;
 
+static OutputStream *info_dump = NULL;
+
 void scandir(const string& path);
 
+/* Converts time to microseconds since the epoch. */
+int64_t encode_time(time_t time)
+{
+    return (int64_t)time * 1000000;
+}
+
 void dumpfile(int fd)
 {
     struct stat stat_buf;
@@ -46,7 +56,7 @@ void dumpfile(int fd)
         }
     }
 
-    printf("Bytes read: %Ld\n", size);
+    printf("    bytes=%Ld\n", size);
 }
 
 void scanfile(const string& path)
@@ -54,6 +64,11 @@ void scanfile(const string& path)
     int fd;
     long flags;
     struct stat stat_buf;
+    char *buf;
+    ssize_t len;
+
+    dictionary file_info;
+
     lstat(path.c_str(), &stat_buf);
 
     printf("%s:\n", path.c_str());
@@ -62,16 +77,58 @@ void scanfile(const string& path)
            stat_buf.st_uid, stat_buf.st_gid, stat_buf.st_nlink,
            (int)stat_buf.st_blksize, (int64_t)stat_buf.st_size);
 
+    file_info["mode"] = encode_u16(stat_buf.st_mode & 07777);
+    file_info["atime"] = encode_u64(encode_time(stat_buf.st_atime));
+    file_info["ctime"] = encode_u64(encode_time(stat_buf.st_ctime));
+    file_info["mtime"] = encode_u64(encode_time(stat_buf.st_mtime));
+    file_info["user"] = encode_u32(stat_buf.st_uid);
+    file_info["group"] = encode_u32(stat_buf.st_gid);
+
+    char inode_type;
+
     switch (stat_buf.st_mode & S_IFMT) {
     case S_IFIFO:
+        printf("    FIFO\n");
+        inode_type = 'p';
+        break;
     case S_IFSOCK:
+        printf("    socket\n");
+        inode_type = 's';
+        break;
     case S_IFCHR:
+        printf("    character device\n");
+        inode_type = 'c';
+        break;
     case S_IFBLK:
+        printf("    block device\n");
+        inode_type = 'b';
+        break;
     case S_IFLNK:
-        printf("  special file\n");
+        printf("    symlink\n");
+        inode_type = 'l';
+
+        /* Use the reported file size to allocate a buffer large enough to read
+         * the symlink.  Allocate slightly more space, so that we ask for more
+         * bytes than we expect and so check for truncation. */
+        buf = new char[stat_buf.st_size + 2];
+        len = readlink(path.c_str(), buf, stat_buf.st_size + 1);
+        if (len < 0) {
+            printf("error reading symlink: %m\n");
+        } else if (len <= stat_buf.st_size) {
+            buf[len] = '\0';
+            printf("    contents=%s\n", buf);
+        } else if (len > stat_buf.st_size) {
+            printf("error reading symlink: name truncated\n");
+        }
+
+        file_info["contents"] = buf;
+
+        delete[] buf;
         break;
     case S_IFREG:
-        printf("  regular file\n");
+        printf("    regular file\n");
+        inode_type = '-';
+
         /* Be paranoid when opening the file.  We have no guarantee that the
          * file was not replaced between the stat() call above and the open()
          * call below, so we might not even be opening a regular file.  That
@@ -90,21 +147,30 @@ void scanfile(const string& path)
         flags = fcntl(fd, F_GETFL);
         fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
 
-        dumpfile(fd);
+        //dumpfile(fd);
+        file_info["size"] = encode_u64(stat_buf.st_size);
         close(fd);
 
         break;
     case S_IFDIR:
-        printf("  directory\n");
+        printf("    directory\n");
+        inode_type = 'd';
         scandir(path);
         break;
+
+    default:
+        fprintf(stderr, "Unknown inode type: mode=%x\n", stat_buf.st_mode);
+        return;
     }
+
+    file_info["type"] = string(1, inode_type);
+
+    info_dump->write_string(path);
+    info_dump->write_dictionary(file_info);
 }
 
 void scandir(const string& path)
 {
-    printf("Scan directory: %s\n", path.c_str());
-
     DIR *dir = opendir(path.c_str());
 
     if (dir == NULL) {
@@ -126,7 +192,6 @@ void scandir(const string& path)
     for (vector<string>::iterator i = contents.begin();
          i != contents.end(); ++i) {
         const string& filename = *i;
-        printf("  d_name = '%s'\n", filename.c_str());
         scanfile(path + "/" + filename);
     }
 
@@ -135,7 +200,20 @@ void scandir(const string& path)
 
 int main(int argc, char *argv[])
 {
-    scandir(".");
+    FILE *dump = fopen("fileinfo", "w");
+    if (dump == NULL) {
+        fprintf(stderr, "Cannot open fileinfo: %m\n");
+        return 1;
+    }
+
+    FileOutputStream os(dump);
+    info_dump = &os;
+
+    try {
+        scandir(".");
+    } catch (IOException e) {
+        fprintf(stderr, "IOException: %s\n", e.getError().c_str());
+    }
 
     return 0;
 }