Fits: tool to parse stream
Simple tool to parse a fits-stream from stdout.
Signed-off-by: Arne Jansen <sensille@gmx.net>
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..1c56476
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,4 @@
+all: fitsparse
+
+fitsparse: fitsparse.c
+ gcc -Wall fitsparse.c -o fitsparse
diff --git a/fitsparse.c b/fitsparse.c
new file mode 100644
index 0000000..3a52250
--- /dev/null
+++ b/fitsparse.c
@@ -0,0 +1,402 @@
+/*
+ * Copyright (C) 2012 STRATO. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+#include <time.h>
+
+int print_binary = 0;
+
+/*
+ * stream definitions taken from send.h, (C) Alexander Block
+ */
+#define BTRFS_SEND_STREAM_MAGIC "btrfs-stream"
+#define BTRFS_SEND_STREAM_VERSION 1
+#define BTRFS_SEND_BUF_SIZE (1024 * 64)
+
+struct btrfs_stream_header {
+ char magic[sizeof(BTRFS_SEND_STREAM_MAGIC)];
+ uint32_t version;
+} __attribute__ ((__packed__));
+
+struct btrfs_cmd_header {
+ /* len excluding the header */
+ uint32_t len;
+ uint16_t cmd;
+ /* crc including the header with zero crc field */
+ uint32_t crc;
+} __attribute__ ((__packed__));
+
+struct btrfs_tlv_header {
+ uint16_t tlv_type;
+ /* len excluding the header */
+ uint16_t tlv_len;
+} __attribute__ ((__packed__));
+
+char *cmd_names[] = {
+ "UNSPEC",
+ "SUBVOL",
+ "SNAPSHOT",
+ "MKFILE",
+ "MKDIR",
+ "MKNOD",
+ "MKFIFO",
+ "MKSOCK",
+ "SYMLINK",
+ "RENAME",
+ "LINK",
+ "UNLINK",
+ "RMDIR",
+ "SET_XATTR",
+ "REMOVE_XATTR",
+ "WRITE",
+ "CLONE",
+ "TRUNCATE",
+ "CHMOD",
+ "CHOWN",
+ "UTIMES",
+ "END"
+};
+#define MAX_CMDS (sizeof(cmd_names) / sizeof(char *))
+
+#define TYPE_UNDEF 0
+#define TYPE_INT 1
+#define TYPE_STRING 2
+#define TYPE_BINARY 3
+#define TYPE_TIME 4
+#define TYPE_HEX 5
+#define TYPE_OCTAL 6
+#define TYPE_LEN_ONLY 7
+
+struct attr_types {
+ const char *name;
+ int type;
+} attrs[] = {
+ { "UNSPEC", TYPE_UNDEF },
+ { "UUID", TYPE_BINARY },
+ { "CTRANSID", TYPE_INT },
+ { "INO", TYPE_INT },
+ { "SIZE", TYPE_INT },
+ { "MODE", TYPE_OCTAL },
+ { "UID", TYPE_INT },
+ { "GID", TYPE_INT },
+ { "RDEV", TYPE_HEX },
+ { "CTIME", TYPE_TIME },
+ { "MTIME", TYPE_TIME },
+ { "ATIME", TYPE_TIME },
+ { "OTIME", TYPE_TIME },
+ { "XATTR_NAME", TYPE_STRING },
+ { "XATTR_DATA", TYPE_BINARY },
+ { "PATH", TYPE_STRING },
+ { "PATH_TO", TYPE_STRING },
+ { "PATH_LINK", TYPE_STRING },
+ { "FILE_OFFSET", TYPE_INT },
+ { "DATA", TYPE_LEN_ONLY },
+ { "CLONE_UUID", TYPE_BINARY },
+ { "CLONE_CTRANSID", TYPE_INT },
+ { "CLONE_PATH", TYPE_STRING },
+ { "CLONE_OFFSET", TYPE_INT },
+ { "CLONE_LEN", TYPE_INT }
+};
+#define MAX_ATTRS (sizeof(attrs) / sizeof(struct attr_types))
+
+uint16_t
+read16(const void *d)
+{
+ const uint8_t *data = d;
+
+ return data[0] + (1 << 8) * (uint16_t)data[1];
+}
+
+uint32_t
+read32(const void *d)
+{
+ const uint8_t *data = d;
+
+ return read16(data) + (1 << 16) * (uint32_t)read16(data + 2);
+}
+
+uint64_t
+read64(const void *d)
+{
+ const uint8_t *data = d;
+
+ return read32(data) + (1ull << 32) * (uint64_t)read32(data + 2);
+}
+
+/*
+ * Extracted from the linux kernel source code, lib/libcrc32c.c.
+ *
+ */
+static const uint32_t crc32c_table[256] = {
+ 0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
+ 0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
+ 0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
+ 0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
+ 0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
+ 0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
+ 0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
+ 0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
+ 0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
+ 0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
+ 0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
+ 0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
+ 0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
+ 0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
+ 0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
+ 0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
+ 0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
+ 0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
+ 0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
+ 0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
+ 0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
+ 0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
+ 0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
+ 0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
+ 0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
+ 0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
+ 0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
+ 0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
+ 0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
+ 0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
+ 0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
+ 0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
+ 0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
+ 0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
+ 0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
+ 0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
+ 0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
+ 0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
+ 0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
+ 0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
+ 0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
+ 0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
+ 0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
+ 0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
+ 0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
+ 0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
+ 0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
+ 0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
+ 0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
+ 0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
+ 0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
+ 0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
+ 0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
+ 0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
+ 0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
+ 0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
+ 0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
+ 0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
+ 0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
+ 0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
+ 0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
+ 0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
+ 0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
+ 0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L
+};
+
+uint32_t crc32c(uint32_t crc, unsigned char const *data, int size)
+{
+ while (size--)
+ crc = crc32c_table[(crc ^ *data++) & 0xffl] ^ (crc >> 8);
+ return crc;
+}
+
+int
+print_attr(int type, char *buf, int len)
+{
+ switch (type) {
+ case TYPE_UNDEF:
+ break;
+ case TYPE_INT:
+ case TYPE_HEX:
+ case TYPE_OCTAL:;
+ uint64_t v;
+ char *format;
+
+ if (len != 8) {
+ printf("invalid length for integer type attribute\n");
+ return -1;
+ }
+ if (type == TYPE_INT)
+ format = "%lld";
+ else if (type == TYPE_HEX)
+ format = "%llx";
+ else if (type == TYPE_OCTAL)
+ format = "%llo";
+ v = read64(buf);
+ printf(format, v);
+ break;
+ case TYPE_STRING:
+ printf("%.*s", len, buf);
+ break;
+ case TYPE_BINARY:;
+ int i;
+ if (print_binary)
+ for (i = 0; i < len; ++i)
+ printf("%02x", (unsigned char)buf[i]);
+ else
+ printf("<blob len %d>", len);
+ break;
+ case TYPE_TIME:;
+ uint64_t sec;
+ uint32_t nsec;
+ struct tm *t;
+ time_t tim;
+
+ if (len != 12) {
+ printf("invalid length for timespec attribute\n");
+ return -1;
+ }
+ sec = read64(buf);
+ nsec = read32(buf + 8);
+ tim = sec; /* XXX lossy */
+ t = localtime(&tim);
+ printf("%04d-%02d-%02d %02d:%02d:%02d.%09d",
+ t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
+ t->tm_hour, t->tm_min, t->tm_sec, nsec);
+ break;
+ case TYPE_LEN_ONLY:
+ printf("length %d", len);
+ break;
+ }
+
+ return 0;
+}
+
+int
+do_read(void *buf, int len)
+{
+ int ret;
+
+ if (len == 0)
+ return 0;
+
+ ret = fread(buf, 1, len, stdin);
+ if (ret == 0)
+ return 1;
+
+ if (ret != len) {
+ printf("read error on stdin: %d=%s\n", errno, strerror(errno));
+ return -1;
+ }
+ return 0;
+}
+
+int
+main(int argc, char **argv)
+{
+ int ret;
+ unsigned char buf[BTRFS_SEND_BUF_SIZE];
+ struct btrfs_stream_header h;
+ struct btrfs_cmd_header cmd;
+ unsigned char *p;
+
+ if (argc == 2 && strcmp(argv[1], "-v") == 0)
+ print_binary = 1;
+
+ ret = do_read(&h, sizeof(h));
+ if (ret) {
+ printf("failed to read header\n");
+ goto out;
+ }
+ if (strncmp(h.magic, BTRFS_SEND_STREAM_MAGIC, sizeof(h.magic))) {
+ printf("bad magic\n");
+ goto out;
+ }
+ if (read32(&h.version) != BTRFS_SEND_STREAM_VERSION) {
+ printf("invalid version %d\n", read32(&h.version));
+ goto out;
+ }
+ printf("stream header, version %d\n", read32(&h.version));
+
+ while (1) {
+ uint32_t clen;
+ uint32_t crc_is;
+ uint32_t crc_should;
+ uint32_t c;
+
+ ret = do_read(&cmd, sizeof(cmd));
+ if (ret == 1)
+ break;
+ if (ret) {
+ printf("failed to read command header\n");
+ goto out;
+ }
+ clen = read32(&cmd.len);
+ if (clen > sizeof(buf)) {
+ printf("cmd too long for buf, clen=%d\n", clen);
+ goto out;
+ }
+ ret = do_read(buf, clen);
+ if (ret) {
+ printf("failed to read command contents\n");
+ goto out;
+ }
+ crc_is = read32(&cmd.crc);
+ cmd.crc = 0;
+ crc_should = crc32c(0, (unsigned char *)&cmd, sizeof(cmd));
+ crc_should = crc32c(crc_should, buf, clen);
+ if (crc_is != crc_should) {
+ printf("crcs don't match, 0x%x != 0x%x\n",
+ crc_is, crc_should);
+ goto out;
+ }
+ c = read16(&cmd.cmd);
+ if (c < 1 || c >= MAX_CMDS) {
+ printf("cmd %d out of range\n", c);
+ goto out;
+ }
+ printf("%s: ", cmd_names[c]);
+ p = buf;
+ int first = 1;
+ while (clen) {
+ struct btrfs_tlv_header *tlv;
+ uint16_t type;
+ uint16_t len;
+
+ tlv = (struct btrfs_tlv_header *)p;
+ type = read16(&tlv->tlv_type);
+ len = read16(&tlv->tlv_len);
+
+ if (type < 1 || type >= MAX_ATTRS) {
+ printf("attr %d out of range\n", type);
+ goto out;
+ }
+ if (!first)
+ printf(", ");
+ first = 0;
+
+ printf("%s ", attrs[type].name);
+ ret = print_attr(attrs[type].type,
+ (void *)(tlv + 1), len);
+ if (ret)
+ goto out;
+
+ p += sizeof(*tlv) + len;
+ clen -= sizeof(*tlv) + len;
+ }
+ printf("\n");
+ }
+
+out:
+ exit(0);
+}
