ckdb - add libbz dependency to the ckdb build and allow reload to read both uncompressed and bzip2 compressed log files

configure.ac

@@ -38,6 +38,7 @@ AC_CHECK_HEADERS(alloca.h pthread.h stdio.h math.h signal.h sys/prctl.h)
 AC_CHECK_HEADERS(sys/types.h sys/socket.h sys/stat.h linux/un.h netdb.h)
 AC_CHECK_HEADERS(stdint.h netinet/in.h netinet/tcp.h sys/ioctl.h getopt.h)
 AC_CHECK_HEADERS(sys/epoll.h libpq-fe.h postgresql/libpq-fe.h grp.h)
+AC_CHECK_HEADERS(bzlib.h)
 
 PTHREAD_LIBS="-lpthread"
 MATH_LIBS="-lm"
@@ -59,13 +60,18 @@ AC_ARG_WITH([ckdb],
 if test "x$ckdb" != "xno"; then
 	AC_CHECK_LIB([pq], [main],[PQ=-lpq],echo "Error: Required library libpq-dev
 		not found. Install it or disable postgresql support with --without-ckdb" && exit 1)
+	AC_CHECK_LIB([bz2], [main],[BZ2=-lbz],echo "Error: Required library libbz
+		not found. Install it or disable libbz2 support with --without-ckdb" && exit 1)
 	AC_DEFINE([USE_CKDB], [1], [Defined to 1 if ckdb support required])
 	PQ_LIBS="-lpq"
+	BZ2_LIBS="-lbz2"
 else
 	PQ_LIBS=""
+	BZ2_LIBS=""
 fi
 AM_CONDITIONAL([WANT_CKDB], [test "x$ckdb" != "xno"])
 AC_SUBST(PQ_LIBS)
+AC_SUBST(BZ2_LIBS)
 
 AC_OUTPUT([Makefile] [src/Makefile])
 
@@ -75,7 +81,7 @@ echo "  CPPFLAGS.............: $CPPFLAGS"
 echo "  CFLAGS...............: $CFLAGS"
 echo "  LDFLAGS..............: $LDFLAGS"
 echo "  LDADD................: $PTHREAD_LIBS $MATH_LIBS $RT_LIBS $JANSSON_LIBS"
-echo "  db LDADD.............: $PQ_LIBS"
+echo "  db LDADD.............: $PQ_LIBS $BZ2_LIBS"
 echo
 echo "Installation...........: make install (as root if needed, with 'su' or 'sudo')"
 echo "  prefix...............: $prefix"

src/Makefile.am

@@ -23,5 +23,5 @@ if WANT_CKDB
 bin_PROGRAMS += ckdb
 ckdb_SOURCES = ckdb.c ckdb_cmd.c ckdb_data.c ckdb_dbio.c ckdb_btc.c \
 		ckdb.h klist.c ktree.c klist.h ktree.h
-ckdb_LDADD = libckpool.la @JANSSON_LIBS@ @PQ_LIBS@
+ckdb_LDADD = libckpool.la @JANSSON_LIBS@ @PQ_LIBS@ @BZ2_LIBS@
 endif

src/ckdb.c

@@ -2646,6 +2646,117 @@ static bool reload_line(PGconn *conn, char *filename, uint64_t count, char *buf)
 #define MAX_READ (10 * 1024 * 1024)
 static char *reload_buf;
 
+#define BZNAME ".bz2"
+
+static bool logline(char *buf, int siz, FILE *fp, BZFILE *bzf, char *filename)
+{
+	static char *bzbuf = NULL;
+	static int bzpos, thisred;
+	static size_t bzlen;
+	char *ret, *ptr;
+	int bzerror, use;
+	bool repeat;
+
+	if (!bzf) {
+		ret = fgets_unlocked(buf, siz, fp);
+		if (!ret && ferror(fp)) {
+			int err = errno;
+			quithere(1, "Read failed on %s (%d) '%s'",
+				    filename, err, strerror(err));
+		}
+		if (ret)
+			return true;
+		else
+			return false;
+	}
+
+	if (!bzbuf) {
+		bzpos = 0;
+		bzlen = MAX_READ*2 + 1;
+		bzbuf = malloc(bzlen);
+		bzbuf[0] = '\0';
+	}
+
+	repeat = true;
+	// Read at least MAX_READ or to EOF
+	while (repeat && bzpos < MAX_READ) {
+		thisred = BZ2_bzRead(&bzerror, bzf, &(bzbuf[bzpos]), MAX_READ*2 - bzpos);
+		if (bzerror != BZ_OK && bzerror != BZ_STREAM_END) {
+			quithere(1, "Read failed on %s"BZNAME" (%d)",
+				    filename, bzerror);
+		}
+		bzpos += thisred;
+		bzbuf[bzpos] = '\0';
+		if (bzerror == BZ_STREAM_END || thisred == 0)
+			repeat = false;
+	}
+	/* Either EOF or a read returned 0
+	 *  with no buffered data left in both cases */
+	if (bzpos == 0)
+		return false;
+
+	ptr = bzbuf;
+	while (*ptr && *ptr != '\n' && *ptr != '\r')
+		ptr++;
+	/* This will lose blank lines except for the first line
+	 * - which is OK anyway since they are an error */
+	while (*ptr == '\n' || *ptr == '\r')
+		ptr++;
+	use = ptr - bzbuf;
+
+	// Return the 'line' (up to siz-1)
+	if (use > (siz - 1))
+		use = siz - 1;
+	memcpy(buf, bzbuf, use);
+	buf[use] = '\0';
+
+	// Buffer remainder
+	if (bzpos > use) {
+		bzpos -= use;
+		memmove(bzbuf, bzbuf+use, bzpos);
+		bzbuf[bzpos] = '\0';
+	} else {
+		bzpos = 0;
+		bzbuf[0] = '\0';
+	}
+	return true;
+}
+
+static bool logopen(char **filename, FILE **fp, BZFILE **bzf)
+{
+	char *bzname;
+	size_t len;
+	int bzerror;
+
+	*fp = *bzf = NULL;
+	*fp = fopen(*filename, "re");
+	if (*fp)
+		return true;
+
+	len = strlen(*filename) + sizeof(BZNAME);
+	bzname = malloc(len + 1);
+	if (!bzname)
+		quithere(1, "(%d) OOM", (int)len);
+	strcpy(bzname, *filename);
+	strcat(bzname, BZNAME);
+
+	*fp = fopen(bzname, "re");
+	if (!(*fp)) {
+		free(bzname);
+		return false;
+	}
+
+	/* An error is fatal, since the file exists, it must be valid
+	 * Skipping files can cause major problems */
+	*bzf = BZ2_bzReadOpen(&bzerror, *fp, 0, 0, NULL, 0);
+	if (bzerror != BZ_OK)
+		quithere(1, "BZ2_bzReadOpen() failed for '%s' (%d)", bzname, bzerror);
+
+	free(*filename);
+	*filename = bzname;
+	return true;
+}
+
 /* If the reload start file is missing and -r was specified correctly:
  *	touch the filename reported in "Failed to open 'filename'",
  *	if ckdb aborts at the beginning of the reload, then start again */
@@ -2657,11 +2768,12 @@ static bool reload_from(tv_t *start)
 	char *missingfirst = NULL, *missinglast = NULL;
 	int missing_count;
 	int processing;
-	bool finished = false, matched = false, ret = true;
+	bool finished = false, matched = false, ret = true, ok;
 	char *filename = NULL;
 	uint64_t count, total;
 	tv_t now;
 	FILE *fp = NULL;
+	BZFILE *bzf = NULL;
 
 	reload_buf = malloc(MAX_READ);
 	if (!reload_buf)
@@ -2677,9 +2789,8 @@ static bool reload_from(tv_t *start)
 	LOGWARNING("%s(): from %s (stamp %s)", __func__, buf, run);
 
 	filename = rotating_filename(restorefrom, reload_timestamp.tv_sec);
-	fp = fopen(filename, "re");
-	if (!fp)
-		quithere(1, "Failed to open '%s'", filename);
+	if (!logopen(&filename, &fp, &bzf))
+		quithere(1, "Failed to open '%s' (or "BZNAME")", filename);
 
 	setnow(&now);
 	tvs_to_buf(&now, run, sizeof(run));
@@ -2695,15 +2806,10 @@ static bool reload_from(tv_t *start)
 		processing++;
 		count = 0;
 
-		while (!everyone_die && !matched && fgets_unlocked(reload_buf, MAX_READ, fp))
+		while (!everyone_die && !matched &&
+			logline(reload_buf, MAX_READ, fp, bzf, filename))
 				matched = reload_line(conn, filename, ++count, reload_buf);
 
-		if (ferror(fp)) {
-			int err = errno;
-			quithere(1, "Read failed on %s (%d) '%s'",
-				    filename, err, strerror(err));
-		}
-
 		LOGWARNING("%s(): %sread %"PRIu64" line%s from %s",
 			   __func__,
 			   everyone_die ? "Shutdown, aborting - " : "",
@@ -2720,8 +2826,8 @@ static bool reload_from(tv_t *start)
 			break;
 		}
 		filename = rotating_filename(restorefrom, reload_timestamp.tv_sec);
-		fp = fopen(filename, "re");
-		if (!fp) {
+		ok = logopen(&filename, &fp, &bzf);
+		if (!ok) {
 			missingfirst = strdup(filename);
 			FREENULL(filename);
 			errno = 0;
@@ -2740,8 +2846,8 @@ static bool reload_from(tv_t *start)
 					break;
 				}
 				filename = rotating_filename(restorefrom, reload_timestamp.tv_sec);
-				fp = fopen(filename, "re");
-				if (fp)
+				ok = logopen(&filename, &fp, &bzf);
+				if (ok)
 					break;
 				errno = 0;
 				if (missing_count++ > 1)

src/ckdb.h

@@ -36,6 +36,7 @@
 #elif defined (HAVE_POSTGRESQL_LIBPQ_FE_H)
 #include <postgresql/libpq-fe.h>
 #endif
+#include <bzlib.h>
 
 #include "ckpool.h"
 #include "libckpool.h"
@@ -52,7 +53,7 @@
 
 #define DB_VLOCK "1"
 #define DB_VERSION "0.9.6"
-#define CKDB_VERSION DB_VERSION"-0.710"
+#define CKDB_VERSION DB_VERSION"-0.720"
 
 #define WHERE_FFL " - from %s %s() line %d"
 #define WHERE_FFL_HERE __FILE__, __func__, __LINE__