pg_rewind: Improve message wording

src/bin/pg_rewind/copy_fetch.c

@@ -148,7 +148,7 @@ recurse_dir(const char *datadir, const char *parentpath,
 				 fullparentpath, strerror(errno));
 
 	if (closedir(xldir))
-		pg_fatal("could not close archive location \"%s\": %s\n",
+		pg_fatal("could not close directory \"%s\": %s\n",
 				 fullparentpath, strerror(errno));
 }
 
@@ -199,7 +199,7 @@ copy_file_range(const char *path, off_t begin, off_t end, bool trunc)
 	}
 
 	if (close(srcfd) != 0)
-		pg_fatal("error closing file \"%s\": %s\n", srcpath, strerror(errno));
+		pg_fatal("could not close file \"%s\": %s\n", srcpath, strerror(errno));
 }
 
 /*

src/bin/pg_rewind/file_ops.c

@@ -25,7 +25,7 @@
 #include "pg_rewind.h"
 
 /*
- * Currently open destination file.
+ * Currently open target file.
  */
 static int	dstfd = -1;
 static char dstpath[MAXPGPATH] = "";
@@ -61,7 +61,7 @@ open_target_file(const char *path, bool trunc)
 		mode |= O_TRUNC;
 	dstfd = open(dstpath, mode, 0600);
 	if (dstfd < 0)
-		pg_fatal("could not open destination file \"%s\": %s\n",
+		pg_fatal("could not open target file \"%s\": %s\n",
 				 dstpath, strerror(errno));
 }
 
@@ -75,7 +75,7 @@ close_target_file(void)
 		return;
 
 	if (close(dstfd) != 0)
-		pg_fatal("error closing destination file \"%s\": %s\n",
+		pg_fatal("could not close target file \"%s\": %s\n",
 				 dstpath, strerror(errno));
 
 	dstfd = -1;
@@ -96,7 +96,7 @@ write_target_range(char *buf, off_t begin, size_t size)
 		return;
 
 	if (lseek(dstfd, begin, SEEK_SET) == -1)
-		pg_fatal("could not seek in destination file \"%s\": %s\n",
+		pg_fatal("could not seek in target file \"%s\": %s\n",
 				 dstpath, strerror(errno));
 
 	writeleft = size;

src/bin/pg_rewind/filemap.c

@@ -93,7 +93,7 @@ process_source_file(const char *path, file_type_t type, size_t newsize,
 	 * regular file
 	 */
 	if (type != FILE_TYPE_REGULAR && isRelDataFile(path))
-		pg_fatal("data file in source \"%s\" is not a regular file\n", path);
+		pg_fatal("data file \"%s\" in source is not a regular file\n", path);
 
 	snprintf(localpath, sizeof(localpath), "%s/%s", datadir_target, path);
 
@@ -256,7 +256,7 @@ process_target_file(const char *path, file_type_t type, size_t oldsize,
 	if (lstat(localpath, &statbuf) < 0)
 	{
 		if (errno != ENOENT)
-			pg_fatal("could not stat file \"%s\": %s",
+			pg_fatal("could not stat file \"%s\": %s\n",
 					 localpath, strerror(errno));
 
 		exists = false;

src/bin/pg_rewind/libpq_fetch.c

@@ -52,10 +52,10 @@ libpqConnect(const char *connstr)
 
 	conn = PQconnectdb(connstr);
 	if (PQstatus(conn) == CONNECTION_BAD)
-		pg_fatal("could not connect to remote server: %s\n",
+		pg_fatal("could not connect to server: %s",
 				 PQerrorMessage(conn));
 
-	pg_log(PG_PROGRESS, "connected to remote server\n");
+	pg_log(PG_PROGRESS, "connected to server\n");
 
 	/*
 	 * Check that the server is not in hot standby mode. There is no
@@ -91,12 +91,12 @@ run_simple_query(const char *sql)
 	res = PQexec(conn, sql);
 
 	if (PQresultStatus(res) != PGRES_TUPLES_OK)
-		pg_fatal("error running query (%s) in source server: %s\n",
+		pg_fatal("error running query (%s) in source server: %s",
 				 sql, PQresultErrorMessage(res));
 
 	/* sanity check the result set */
 	if (PQnfields(res) != 1 || PQntuples(res) != 1 || PQgetisnull(res, 0, 0))
-		pg_fatal("unexpected result set while running query\n");
+		pg_fatal("unexpected result set from query\n");
 
 	result = pg_strdup(PQgetvalue(res, 0, 0));
 
@@ -119,7 +119,7 @@ libpqGetCurrentXlogInsertLocation(void)
 	val = run_simple_query("SELECT pg_current_xlog_insert_location()");
 
 	if (sscanf(val, "%X/%X", &hi, &lo) != 2)
-		pg_fatal("unexpected result \"%s\" while fetching current XLOG insert location\n", val);
+		pg_fatal("unrecognized result \"%s\" for current XLOG insert location\n", val);
 
 	result = ((uint64) hi) << 32 | lo;
 
@@ -167,7 +167,7 @@ libpqProcessFileList(void)
 	res = PQexec(conn, sql);
 
 	if (PQresultStatus(res) != PGRES_TUPLES_OK)
-		pg_fatal("unexpected result while fetching file list: %s\n",
+		pg_fatal("could not fetch file list: %s",
 				 PQresultErrorMessage(res));
 
 	/* sanity check the result set */
@@ -210,7 +210,7 @@ receiveFileChunks(const char *sql)
 	PGresult   *res;
 
 	if (PQsendQueryParams(conn, sql, 0, NULL, NULL, NULL, NULL, 1) != 1)
-		pg_fatal("could not send query: %s\n", PQerrorMessage(conn));
+		pg_fatal("could not send query: %s", PQerrorMessage(conn));
 
 	pg_log(PG_DEBUG, "getting file chunks");
 
@@ -262,7 +262,7 @@ receiveFileChunks(const char *sql)
 			PQgetisnull(res, 0, 1) ||
 			PQgetisnull(res, 0, 2))
 		{
-			pg_fatal("unexpected NULL result while fetching remote files\n");
+			pg_fatal("unexpected null values in result while fetching remote files\n");
 		}
 
 		if (PQgetlength(res, 0, 1) != sizeof(int32))
@@ -280,7 +280,7 @@ receiveFileChunks(const char *sql)
 
 		chunk = PQgetvalue(res, 0, 2);
 
-		pg_log(PG_DEBUG, "received chunk for file \"%s\", off %d, len %d\n",
+		pg_log(PG_DEBUG, "received chunk for file \"%s\", offset %d, size %d\n",
 			   filename, chunkoff, chunksize);
 
 		open_target_file(filename, false);
@@ -309,7 +309,7 @@ libpqGetFile(const char *filename, size_t *filesize)
 					   1, NULL, paramValues, NULL, NULL, 1);
 
 	if (PQresultStatus(res) != PGRES_TUPLES_OK)
-		pg_fatal("unexpected result while fetching remote file \"%s\": %s\n",
+		pg_fatal("could not fetch remote file \"%s\": %s",
 				 filename, PQresultErrorMessage(res));
 
 	/* sanity check the result set */
@@ -355,7 +355,7 @@ fetch_file_range(const char *path, unsigned int begin, unsigned int end)
 		snprintf(linebuf, sizeof(linebuf), "%s\t%u\t%u\n", path, begin, len);
 
 		if (PQputCopyData(conn, linebuf, strlen(linebuf)) != 1)
-			pg_fatal("error sending COPY data: %s\n",
+			pg_fatal("could not send COPY data: %s",
 					 PQerrorMessage(conn));
 
 		begin += len;
@@ -381,14 +381,14 @@ libpq_executeFileMap(filemap_t *map)
 	res = PQexec(conn, sql);
 
 	if (PQresultStatus(res) != PGRES_COMMAND_OK)
-		pg_fatal("error creating temporary table: %s\n",
+		pg_fatal("could not create temporary table: %s",
 				 PQresultErrorMessage(res));
 
 	sql = "COPY fetchchunks FROM STDIN";
 	res = PQexec(conn, sql);
 
 	if (PQresultStatus(res) != PGRES_COPY_IN)
-		pg_fatal("unexpected result while sending file list: %s\n",
+		pg_fatal("could not send file list: %s",
 				 PQresultErrorMessage(res));
 
 	for (i = 0; i < map->narray; i++)
@@ -429,13 +429,13 @@ libpq_executeFileMap(filemap_t *map)
 	}
 
 	if (PQputCopyEnd(conn, NULL) != 1)
-		pg_fatal("error sending end-of-COPY: %s\n",
+		pg_fatal("could not send end-of-COPY: %s",
 				 PQerrorMessage(conn));
 
 	while ((res = PQgetResult(conn)) != NULL)
 	{
 		if (PQresultStatus(res) != PGRES_COMMAND_OK)
-			pg_fatal("unexpected result while sending file list: %s\n",
+			pg_fatal("unexpected result while sending file list: %s",
 					 PQresultErrorMessage(res));
 	}
 

src/bin/pg_rewind/parsexlog.c

@@ -84,11 +84,11 @@ extractPageMap(const char *datadir, XLogRecPtr startpoint, TimeLineID tli,
 			errptr = startpoint ? startpoint : xlogreader->EndRecPtr;
 
 			if (errormsg)
-				pg_fatal("error reading WAL at %X/%X: %s\n",
+				pg_fatal("could not read WAL record at %X/%X: %s\n",
 						 (uint32) (errptr >> 32), (uint32) (errptr),
 						 errormsg);
 			else
-				pg_fatal("error reading WAL at %X/%X\n",
+				pg_fatal("could not read WAL record at %X/%X\n",
 						 (uint32) (startpoint >> 32),
 						 (uint32) (startpoint));
 		}

src/bin/pg_rewind/pg_rewind.c

@@ -56,22 +56,18 @@ bool		dry_run = false;
 static void
 usage(const char *progname)
 {
-	printf(_("%s resynchronizes a cluster with another copy of the cluster.\n\n"), progname);
+	printf(_("%s resynchronizes a PostgreSQL cluster with another copy of the cluster.\n\n"), progname);
 	printf(_("Usage:\n  %s [OPTION]...\n\n"), progname);
 	printf(_("Options:\n"));
-	printf(_("  -D, --target-pgdata=DIRECTORY\n"));
-	printf(_("                 existing data directory to modify\n"));
-	printf(_("  --source-pgdata=DIRECTORY\n"));
-	printf(_("                 source data directory to sync with\n"));
-	printf(_("  --source-server=CONNSTR\n"));
-	printf(_("                 source server to sync with\n"));
-	printf(_("  -P, --progress write progress messages\n"));
+	printf(_("  -D, --target-pgdata=DIRECTORY  existing data directory to modify\n"));
+	printf(_("      --source-pgdata=DIRECTORY  source data directory to sync with\n"));
+	printf(_("      --source-server=CONNSTR    source server to sync with\n"));
 	printf(_("  -n, --dry-run                  stop before modifying anything\n"));
+	printf(_("  -P, --progress                 write progress messages\n"));
 	printf(_("      --debug                    write a lot of debug messages\n"));
 	printf(_("  -V, --version                  output version information, then exit\n"));
 	printf(_("  -?, --help                     show this help, then exit\n"));
-	printf(_("\n"));
-	printf(_("Report bugs to <pgsql-bugs@postgresql.org>.\n"));
+	printf(_("\nReport bugs to <pgsql-bugs@postgresql.org>.\n"));
 }
 
 
@@ -154,24 +150,24 @@ main(int argc, char **argv)
 		}
 	}
 
-	/* No source given? Show usage */
 	if (datadir_source == NULL && connstr_source == NULL)
 	{
-		fprintf(stderr, _("no source specified (--source-pgdata or --source-server)\n"));
+		fprintf(stderr, _("%s: no source specified (--source-pgdata or --source-server)\n"), progname);
 		fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
 		exit(1);
 	}
 
 	if (datadir_target == NULL)
 	{
-		fprintf(stderr, _("no target data directory specified (--target-pgdata)\n"));
+		fprintf(stderr, _("%s: no target data directory specified (--target-pgdata)\n"), progname);
 		fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
 		exit(1);
 	}
 
-	if (argc != optind)
+	if (optind < argc)
 	{
-		fprintf(stderr, _("invalid arguments\n"));
+		fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"),
+				progname, argv[optind]);
 		fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
 		exit(1);
 	}
@@ -184,9 +180,11 @@ main(int argc, char **argv)
 	 */
 #ifndef WIN32
 	if (geteuid() == 0)
-		pg_fatal("cannot be executed by \"root\"\n"
-				 "You must run %s as the PostgreSQL superuser.\n",
+	{
+		fprintf(stderr, _("cannot be executed by \"root\"\n"));
+		fprintf(stderr, _("You must run %s as the PostgreSQL superuser.\n"),
 				progname);
+	}
 #endif
 
 	get_restricted_token(progname);
@@ -295,7 +293,7 @@ main(int argc, char **argv)
 	 */
 	if (showprogress)
 	{
-		pg_log(PG_PROGRESS, "Need to copy %lu MB (total source directory size is %lu MB)\n",
+		pg_log(PG_PROGRESS, "need to copy %lu MB (total source directory size is %lu MB)\n",
 			   (unsigned long) (filemap->fetch_size / (1024 * 1024)),
 			   (unsigned long) (filemap->total_size / (1024 * 1024)));
 

src/bin/pg_rewind/timeline.c

@@ -73,20 +73,20 @@ rewind_parseTimeLineHistory(char *buffer, TimeLineID targetTLI, int *nentries)
 		if (nfields < 1)
 		{
 			/* expect a numeric timeline ID as first field of line */
-			printf(_("syntax error in history file: %s\n"), fline);
-			printf(_("Expected a numeric timeline ID.\n"));
+			fprintf(stderr, _("syntax error in history file: %s\n"), fline);
+			fprintf(stderr, _("Expected a numeric timeline ID.\n"));
 			exit(1);
 		}
 		if (nfields != 3)
 		{
-			printf(_("syntax error in history file: %s\n"), fline);
-			printf(_("Expected an XLOG switchpoint location.\n"));
+			fprintf(stderr, _("syntax error in history file: %s\n"), fline);
+			fprintf(stderr, _("Expected an XLOG switchpoint location.\n"));
 			exit(1);
 		}
 		if (entries && tli <= lasttli)
 		{
-			printf(_("invalid data in history file: %s\n"), fline);
-			printf(_("Timeline IDs must be in increasing sequence.\n"));
+			fprintf(stderr, _("invalid data in history file: %s\n"), fline);
+			fprintf(stderr, _("Timeline IDs must be in increasing sequence.\n"));
 			exit(1);
 		}
 
@@ -106,8 +106,8 @@ rewind_parseTimeLineHistory(char *buffer, TimeLineID targetTLI, int *nentries)
 
 	if (entries && targetTLI <= lasttli)
 	{
-		printf(_("invalid data in history file\n"));
-		printf(_("Timeline IDs must be less than child timeline's ID.\n"));
+		fprintf(stderr, _("invalid data in history file\n"));
+		fprintf(stderr, _("Timeline IDs must be less than child timeline's ID.\n"));
 		exit(1);
 	}