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https://git.postgresql.org/git/postgresql.git
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Commit a730183926
created rather a mess by
putting dependencies on backend-only include files into include/common.
We really shouldn't do that. To clean it up:
* Move TABLESPACE_VERSION_DIRECTORY back to its longtime home in
catalog/catalog.h. We won't consider this symbol part of the FE/BE API.
* Push enum ForkNumber from relfilenode.h into relpath.h. We'll consider
relpath.h as the source of truth for fork numbers, since relpath.c was
already partially serving that function, and anyway relfilenode.h was
kind of a random place for that enum.
* So, relfilenode.h now includes relpath.h rather than vice-versa. This
direction of dependency is fine. (That allows most, but not quite all,
of the existing explicit #includes of relpath.h to go away again.)
* Push forkname_to_number from catalog.c to relpath.c, just to centralize
fork number stuff a bit better.
* Push GetDatabasePath from catalog.c to relpath.c; it was rather odd
that the previous commit didn't keep this together with relpath().
* To avoid needing relfilenode.h in common/, redefine the underlying
function (now called GetRelationPath) as taking separate OID arguments,
and make the APIs using RelFileNode or RelFileNodeBackend into macro
wrappers. (The macros have a potential multiple-eval risk, but none of
the existing call sites have an issue with that; one of them had such a
risk already anyway.)
* Fix failure to follow the directions when "init" fork type was added;
specifically, the errhint in forkname_to_number wasn't updated, and neither
was the SGML documentation for pg_relation_size().
* Fix tablespace-path-too-long check in CreateTableSpace() to account for
fork-name component of maximum-length pathnames. This requires putting
FORKNAMECHARS into a header file, but it was rather useless (and
actually unreferenced) where it was.
The last couple of items are potentially back-patchable bug fixes,
if anyone is sufficiently excited about them; but personally I'm not.
Per a gripe from Christoph Berg about how include/common wasn't
self-contained.
736 lines
18 KiB
C
736 lines
18 KiB
C
/*-------------------------------------------------------------------------
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*
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* pg_xlogdump.c - decode and display WAL
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*
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* Copyright (c) 2013-2014, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* contrib/pg_xlogdump/pg_xlogdump.c
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*-------------------------------------------------------------------------
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*/
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#define FRONTEND 1
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#include "postgres.h"
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#include <dirent.h>
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#include <unistd.h>
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#include "access/xlog.h"
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#include "access/xlogreader.h"
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#include "access/transam.h"
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#include "common/fe_memutils.h"
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#include "getopt_long.h"
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#include "rmgrdesc.h"
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static const char *progname;
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typedef struct XLogDumpPrivate
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{
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TimeLineID timeline;
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char *inpath;
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XLogRecPtr startptr;
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XLogRecPtr endptr;
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bool endptr_reached;
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} XLogDumpPrivate;
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typedef struct XLogDumpConfig
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{
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/* display options */
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bool bkp_details;
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int stop_after_records;
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int already_displayed_records;
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bool follow;
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/* filter options */
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int filter_by_rmgr;
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TransactionId filter_by_xid;
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bool filter_by_xid_enabled;
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} XLogDumpConfig;
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static void
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fatal_error(const char *fmt,...)
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__attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2)));
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/*
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* Big red button to push when things go horribly wrong.
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*/
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static void
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fatal_error(const char *fmt,...)
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{
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va_list args;
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fflush(stdout);
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fprintf(stderr, "%s: FATAL: ", progname);
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va_start(args, fmt);
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vfprintf(stderr, fmt, args);
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va_end(args);
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fputc('\n', stderr);
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exit(EXIT_FAILURE);
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}
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static void
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print_rmgr_list(void)
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{
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int i;
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for (i = 0; i <= RM_MAX_ID; i++)
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{
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printf("%s\n", RmgrDescTable[i].rm_name);
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}
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}
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/*
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* Check whether directory exists and whether we can open it. Keep errno set so
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* that the caller can report errors somewhat more accurately.
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*/
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static bool
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verify_directory(const char *directory)
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{
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DIR *dir = opendir(directory);
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if (dir == NULL)
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return false;
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closedir(dir);
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return true;
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}
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/*
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* Split a pathname as dirname(1) and basename(1) would.
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*
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* XXX this probably doesn't do very well on Windows. We probably need to
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* apply canonicalize_path(), at the very least.
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*/
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static void
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split_path(const char *path, char **dir, char **fname)
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{
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char *sep;
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/* split filepath into directory & filename */
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sep = strrchr(path, '/');
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/* directory path */
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if (sep != NULL)
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{
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*dir = pg_strdup(path);
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(*dir)[(sep - path) + 1] = '\0'; /* no strndup */
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*fname = pg_strdup(sep + 1);
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}
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/* local directory */
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else
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{
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*dir = NULL;
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*fname = pg_strdup(path);
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}
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}
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/*
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* Try to find the file in several places:
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* if directory == NULL:
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* fname
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* XLOGDIR / fname
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* $PGDATA / XLOGDIR / fname
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* else
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* directory / fname
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* directory / XLOGDIR / fname
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*
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* return a read only fd
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*/
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static int
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fuzzy_open_file(const char *directory, const char *fname)
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{
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int fd = -1;
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char fpath[MAXPGPATH];
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if (directory == NULL)
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{
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const char *datadir;
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/* fname */
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fd = open(fname, O_RDONLY | PG_BINARY, 0);
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if (fd < 0 && errno != ENOENT)
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return -1;
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else if (fd > 0)
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return fd;
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/* XLOGDIR / fname */
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snprintf(fpath, MAXPGPATH, "%s/%s",
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XLOGDIR, fname);
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fd = open(fpath, O_RDONLY | PG_BINARY, 0);
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if (fd < 0 && errno != ENOENT)
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return -1;
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else if (fd > 0)
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return fd;
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datadir = getenv("PGDATA");
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/* $PGDATA / XLOGDIR / fname */
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if (datadir != NULL)
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{
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snprintf(fpath, MAXPGPATH, "%s/%s/%s",
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datadir, XLOGDIR, fname);
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fd = open(fpath, O_RDONLY | PG_BINARY, 0);
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if (fd < 0 && errno != ENOENT)
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return -1;
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else if (fd > 0)
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return fd;
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}
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}
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else
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{
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/* directory / fname */
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snprintf(fpath, MAXPGPATH, "%s/%s",
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directory, fname);
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fd = open(fpath, O_RDONLY | PG_BINARY, 0);
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if (fd < 0 && errno != ENOENT)
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return -1;
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else if (fd > 0)
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return fd;
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/* directory / XLOGDIR / fname */
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snprintf(fpath, MAXPGPATH, "%s/%s/%s",
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directory, XLOGDIR, fname);
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fd = open(fpath, O_RDONLY | PG_BINARY, 0);
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if (fd < 0 && errno != ENOENT)
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return -1;
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else if (fd > 0)
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return fd;
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}
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return -1;
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}
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/*
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* Read count bytes from a segment file in the specified directory, for the
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* given timeline, containing the specified record pointer; store the data in
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* the passed buffer.
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*/
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static void
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XLogDumpXLogRead(const char *directory, TimeLineID timeline_id,
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XLogRecPtr startptr, char *buf, Size count)
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{
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char *p;
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XLogRecPtr recptr;
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Size nbytes;
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static int sendFile = -1;
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static XLogSegNo sendSegNo = 0;
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static uint32 sendOff = 0;
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p = buf;
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recptr = startptr;
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nbytes = count;
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while (nbytes > 0)
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{
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uint32 startoff;
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int segbytes;
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int readbytes;
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startoff = recptr % XLogSegSize;
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if (sendFile < 0 || !XLByteInSeg(recptr, sendSegNo))
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{
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char fname[MAXFNAMELEN];
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/* Switch to another logfile segment */
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if (sendFile >= 0)
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close(sendFile);
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XLByteToSeg(recptr, sendSegNo);
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XLogFileName(fname, timeline_id, sendSegNo);
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sendFile = fuzzy_open_file(directory, fname);
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if (sendFile < 0)
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fatal_error("could not find file \"%s\": %s",
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fname, strerror(errno));
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sendOff = 0;
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}
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/* Need to seek in the file? */
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if (sendOff != startoff)
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{
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if (lseek(sendFile, (off_t) startoff, SEEK_SET) < 0)
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{
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int err = errno;
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char fname[MAXPGPATH];
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XLogFileName(fname, timeline_id, sendSegNo);
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fatal_error("could not seek in log segment %s to offset %u: %s",
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fname, startoff, strerror(err));
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}
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sendOff = startoff;
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}
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/* How many bytes are within this segment? */
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if (nbytes > (XLogSegSize - startoff))
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segbytes = XLogSegSize - startoff;
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else
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segbytes = nbytes;
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readbytes = read(sendFile, p, segbytes);
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if (readbytes <= 0)
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{
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int err = errno;
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char fname[MAXPGPATH];
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XLogFileName(fname, timeline_id, sendSegNo);
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fatal_error("could not read from log segment %s, offset %d, length %d: %s",
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fname, sendOff, segbytes, strerror(err));
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}
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/* Update state for read */
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recptr += readbytes;
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sendOff += readbytes;
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nbytes -= readbytes;
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p += readbytes;
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}
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}
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/*
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* XLogReader read_page callback
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*/
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static int
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XLogDumpReadPage(XLogReaderState *state, XLogRecPtr targetPagePtr, int reqLen,
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XLogRecPtr targetPtr, char *readBuff, TimeLineID *curFileTLI)
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{
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XLogDumpPrivate *private = state->private_data;
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int count = XLOG_BLCKSZ;
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if (private->endptr != InvalidXLogRecPtr)
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{
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if (targetPagePtr + XLOG_BLCKSZ <= private->endptr)
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count = XLOG_BLCKSZ;
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else if (targetPagePtr + reqLen <= private->endptr)
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count = private->endptr - targetPagePtr;
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else
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{
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private->endptr_reached = true;
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return -1;
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}
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}
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XLogDumpXLogRead(private->inpath, private->timeline, targetPagePtr,
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readBuff, count);
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return count;
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}
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/*
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* Print a record to stdout
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*/
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static void
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XLogDumpDisplayRecord(XLogDumpConfig *config, XLogRecPtr ReadRecPtr, XLogRecord *record)
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{
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const RmgrDescData *desc = &RmgrDescTable[record->xl_rmid];
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if (config->filter_by_rmgr != -1 &&
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config->filter_by_rmgr != record->xl_rmid)
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return;
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if (config->filter_by_xid_enabled &&
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config->filter_by_xid != record->xl_xid)
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return;
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config->already_displayed_records++;
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printf("rmgr: %-11s len (rec/tot): %6u/%6u, tx: %10u, lsn: %X/%08X, prev %X/%08X, bkp: %u%u%u%u, desc: ",
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desc->rm_name,
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record->xl_len, record->xl_tot_len,
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record->xl_xid,
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(uint32) (ReadRecPtr >> 32), (uint32) ReadRecPtr,
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(uint32) (record->xl_prev >> 32), (uint32) record->xl_prev,
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!!(XLR_BKP_BLOCK(0) & record->xl_info),
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!!(XLR_BKP_BLOCK(1) & record->xl_info),
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!!(XLR_BKP_BLOCK(2) & record->xl_info),
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!!(XLR_BKP_BLOCK(3) & record->xl_info));
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/* the desc routine will printf the description directly to stdout */
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desc->rm_desc(NULL, record->xl_info, XLogRecGetData(record));
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putchar('\n');
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if (config->bkp_details)
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{
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int bkpnum;
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char *blk = (char *) XLogRecGetData(record) + record->xl_len;
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for (bkpnum = 0; bkpnum < XLR_MAX_BKP_BLOCKS; bkpnum++)
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{
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BkpBlock bkpb;
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if (!(XLR_BKP_BLOCK(bkpnum) & record->xl_info))
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continue;
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memcpy(&bkpb, blk, sizeof(BkpBlock));
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blk += sizeof(BkpBlock);
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blk += BLCKSZ - bkpb.hole_length;
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printf("\tbackup bkp #%u; rel %u/%u/%u; fork: %s; block: %u; hole: offset: %u, length: %u\n",
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bkpnum,
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bkpb.node.spcNode, bkpb.node.dbNode, bkpb.node.relNode,
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forkNames[bkpb.fork],
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bkpb.block, bkpb.hole_offset, bkpb.hole_length);
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}
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}
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}
|
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|
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static void
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usage(void)
|
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{
|
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printf("%s decodes and displays PostgreSQL transaction logs for debugging.\n\n",
|
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progname);
|
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printf("Usage:\n");
|
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printf(" %s [OPTION]... [STARTSEG [ENDSEG]] \n", progname);
|
|
printf("\nOptions:\n");
|
|
printf(" -b, --bkp-details output detailed information about backup blocks\n");
|
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printf(" -e, --end=RECPTR stop reading at log position RECPTR\n");
|
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printf(" -f, --follow keep retrying after reaching end of WAL\n");
|
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printf(" -n, --limit=N number of records to display\n");
|
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printf(" -p, --path=PATH directory in which to find log segment files\n");
|
|
printf(" (default: ./pg_xlog)\n");
|
|
printf(" -r, --rmgr=RMGR only show records generated by resource manager RMGR\n");
|
|
printf(" use --rmgr=list to list valid resource manager names\n");
|
|
printf(" -s, --start=RECPTR start reading at log position RECPTR\n");
|
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printf(" -t, --timeline=TLI timeline from which to read log records\n");
|
|
printf(" (default: 1 or the value used in STARTSEG)\n");
|
|
printf(" -V, --version output version information, then exit\n");
|
|
printf(" -x, --xid=XID only show records with TransactionId XID\n");
|
|
printf(" -?, --help show this help, then exit\n");
|
|
}
|
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|
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int
|
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main(int argc, char **argv)
|
|
{
|
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uint32 xlogid;
|
|
uint32 xrecoff;
|
|
XLogReaderState *xlogreader_state;
|
|
XLogDumpPrivate private;
|
|
XLogDumpConfig config;
|
|
XLogRecord *record;
|
|
XLogRecPtr first_record;
|
|
char *errormsg;
|
|
|
|
static struct option long_options[] = {
|
|
{"bkp-details", no_argument, NULL, 'b'},
|
|
{"end", required_argument, NULL, 'e'},
|
|
{"follow", no_argument, NULL, 'f'},
|
|
{"help", no_argument, NULL, '?'},
|
|
{"limit", required_argument, NULL, 'n'},
|
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{"path", required_argument, NULL, 'p'},
|
|
{"rmgr", required_argument, NULL, 'r'},
|
|
{"start", required_argument, NULL, 's'},
|
|
{"timeline", required_argument, NULL, 't'},
|
|
{"xid", required_argument, NULL, 'x'},
|
|
{"version", no_argument, NULL, 'V'},
|
|
{NULL, 0, NULL, 0}
|
|
};
|
|
|
|
int option;
|
|
int optindex = 0;
|
|
|
|
progname = get_progname(argv[0]);
|
|
|
|
memset(&private, 0, sizeof(XLogDumpPrivate));
|
|
memset(&config, 0, sizeof(XLogDumpConfig));
|
|
|
|
private.timeline = 1;
|
|
private.startptr = InvalidXLogRecPtr;
|
|
private.endptr = InvalidXLogRecPtr;
|
|
private.endptr_reached = false;
|
|
|
|
config.bkp_details = false;
|
|
config.stop_after_records = -1;
|
|
config.already_displayed_records = 0;
|
|
config.follow = false;
|
|
config.filter_by_rmgr = -1;
|
|
config.filter_by_xid = InvalidTransactionId;
|
|
config.filter_by_xid_enabled = false;
|
|
|
|
if (argc <= 1)
|
|
{
|
|
fprintf(stderr, "%s: no arguments specified\n", progname);
|
|
goto bad_argument;
|
|
}
|
|
|
|
while ((option = getopt_long(argc, argv, "be:?fn:p:r:s:t:Vx:",
|
|
long_options, &optindex)) != -1)
|
|
{
|
|
switch (option)
|
|
{
|
|
case 'b':
|
|
config.bkp_details = true;
|
|
break;
|
|
case 'e':
|
|
if (sscanf(optarg, "%X/%X", &xlogid, &xrecoff) != 2)
|
|
{
|
|
fprintf(stderr, "%s: could not parse end log position \"%s\"\n",
|
|
progname, optarg);
|
|
goto bad_argument;
|
|
}
|
|
private.endptr = (uint64) xlogid << 32 | xrecoff;
|
|
break;
|
|
case 'f':
|
|
config.follow = true;
|
|
break;
|
|
case '?':
|
|
usage();
|
|
exit(EXIT_SUCCESS);
|
|
break;
|
|
case 'n':
|
|
if (sscanf(optarg, "%d", &config.stop_after_records) != 1)
|
|
{
|
|
fprintf(stderr, "%s: could not parse limit \"%s\"\n",
|
|
progname, optarg);
|
|
goto bad_argument;
|
|
}
|
|
break;
|
|
case 'p':
|
|
private.inpath = pg_strdup(optarg);
|
|
break;
|
|
case 'r':
|
|
{
|
|
int i;
|
|
|
|
if (pg_strcasecmp(optarg, "list") == 0)
|
|
{
|
|
print_rmgr_list();
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
for (i = 0; i <= RM_MAX_ID; i++)
|
|
{
|
|
if (pg_strcasecmp(optarg, RmgrDescTable[i].rm_name) == 0)
|
|
{
|
|
config.filter_by_rmgr = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (config.filter_by_rmgr == -1)
|
|
{
|
|
fprintf(stderr, "%s: resource manager \"%s\" does not exist\n",
|
|
progname, optarg);
|
|
goto bad_argument;
|
|
}
|
|
}
|
|
break;
|
|
case 's':
|
|
if (sscanf(optarg, "%X/%X", &xlogid, &xrecoff) != 2)
|
|
{
|
|
fprintf(stderr, "%s: could not parse start log position \"%s\"\n",
|
|
progname, optarg);
|
|
goto bad_argument;
|
|
}
|
|
else
|
|
private.startptr = (uint64) xlogid << 32 | xrecoff;
|
|
break;
|
|
case 't':
|
|
if (sscanf(optarg, "%d", &private.timeline) != 1)
|
|
{
|
|
fprintf(stderr, "%s: could not parse timeline \"%s\"\n",
|
|
progname, optarg);
|
|
goto bad_argument;
|
|
}
|
|
break;
|
|
case 'V':
|
|
puts("pg_xlogdump (PostgreSQL) " PG_VERSION);
|
|
exit(EXIT_SUCCESS);
|
|
break;
|
|
case 'x':
|
|
if (sscanf(optarg, "%u", &config.filter_by_xid) != 1)
|
|
{
|
|
fprintf(stderr, "%s: could not parse \"%s\" as a valid xid\n",
|
|
progname, optarg);
|
|
goto bad_argument;
|
|
}
|
|
config.filter_by_xid_enabled = true;
|
|
break;
|
|
default:
|
|
goto bad_argument;
|
|
}
|
|
}
|
|
|
|
if ((optind + 2) < argc)
|
|
{
|
|
fprintf(stderr,
|
|
"%s: too many command-line arguments (first is \"%s\")\n",
|
|
progname, argv[optind + 2]);
|
|
goto bad_argument;
|
|
}
|
|
|
|
if (private.inpath != NULL)
|
|
{
|
|
/* validate path points to directory */
|
|
if (!verify_directory(private.inpath))
|
|
{
|
|
fprintf(stderr,
|
|
"%s: path \"%s\" cannot be opened: %s",
|
|
progname, private.inpath, strerror(errno));
|
|
goto bad_argument;
|
|
}
|
|
}
|
|
|
|
/* parse files as start/end boundaries, extract path if not specified */
|
|
if (optind < argc)
|
|
{
|
|
char *directory = NULL;
|
|
char *fname = NULL;
|
|
int fd;
|
|
XLogSegNo segno;
|
|
|
|
split_path(argv[optind], &directory, &fname);
|
|
|
|
if (private.inpath == NULL && directory != NULL)
|
|
{
|
|
private.inpath = directory;
|
|
|
|
if (!verify_directory(private.inpath))
|
|
fatal_error("cannot open directory \"%s\": %s",
|
|
private.inpath, strerror(errno));
|
|
}
|
|
|
|
fd = fuzzy_open_file(private.inpath, fname);
|
|
if (fd < 0)
|
|
fatal_error("could not open file \"%s\"", fname);
|
|
close(fd);
|
|
|
|
/* parse position from file */
|
|
XLogFromFileName(fname, &private.timeline, &segno);
|
|
|
|
if (XLogRecPtrIsInvalid(private.startptr))
|
|
XLogSegNoOffsetToRecPtr(segno, 0, private.startptr);
|
|
else if (!XLByteInSeg(private.startptr, segno))
|
|
{
|
|
fprintf(stderr,
|
|
"%s: start log position %X/%X is not inside file \"%s\"\n",
|
|
progname,
|
|
(uint32) (private.startptr >> 32),
|
|
(uint32) private.startptr,
|
|
fname);
|
|
goto bad_argument;
|
|
}
|
|
|
|
/* no second file specified, set end position */
|
|
if (!(optind + 1 < argc) && XLogRecPtrIsInvalid(private.endptr))
|
|
XLogSegNoOffsetToRecPtr(segno + 1, 0, private.endptr);
|
|
|
|
/* parse ENDSEG if passed */
|
|
if (optind + 1 < argc)
|
|
{
|
|
XLogSegNo endsegno;
|
|
|
|
/* ignore directory, already have that */
|
|
split_path(argv[optind + 1], &directory, &fname);
|
|
|
|
fd = fuzzy_open_file(private.inpath, fname);
|
|
if (fd < 0)
|
|
fatal_error("could not open file \"%s\"", fname);
|
|
close(fd);
|
|
|
|
/* parse position from file */
|
|
XLogFromFileName(fname, &private.timeline, &endsegno);
|
|
|
|
if (endsegno < segno)
|
|
fatal_error("ENDSEG %s is before STARTSEG %s",
|
|
argv[optind + 1], argv[optind]);
|
|
|
|
if (XLogRecPtrIsInvalid(private.endptr))
|
|
XLogSegNoOffsetToRecPtr(endsegno + 1, 0, private.endptr);
|
|
|
|
/* set segno to endsegno for check of --end */
|
|
segno = endsegno;
|
|
}
|
|
|
|
|
|
if (!XLByteInSeg(private.endptr, segno) &&
|
|
private.endptr != (segno + 1) * XLogSegSize)
|
|
{
|
|
fprintf(stderr,
|
|
"%s: end log position %X/%X is not inside file \"%s\"\n",
|
|
progname,
|
|
(uint32) (private.endptr >> 32),
|
|
(uint32) private.endptr,
|
|
argv[argc - 1]);
|
|
goto bad_argument;
|
|
}
|
|
}
|
|
|
|
/* we don't know what to print */
|
|
if (XLogRecPtrIsInvalid(private.startptr))
|
|
{
|
|
fprintf(stderr, "%s: no start log position given in range mode.\n", progname);
|
|
goto bad_argument;
|
|
}
|
|
|
|
/* done with argument parsing, do the actual work */
|
|
|
|
/* we have everything we need, start reading */
|
|
xlogreader_state = XLogReaderAllocate(XLogDumpReadPage, &private);
|
|
if (!xlogreader_state)
|
|
fatal_error("out of memory");
|
|
|
|
/* first find a valid recptr to start from */
|
|
first_record = XLogFindNextRecord(xlogreader_state, private.startptr);
|
|
|
|
if (first_record == InvalidXLogRecPtr)
|
|
fatal_error("could not find a valid record after %X/%X",
|
|
(uint32) (private.startptr >> 32),
|
|
(uint32) private.startptr);
|
|
|
|
/*
|
|
* Display a message that we're skipping data if `from` wasn't a pointer
|
|
* to the start of a record and also wasn't a pointer to the beginning of
|
|
* a segment (e.g. we were used in file mode).
|
|
*/
|
|
if (first_record != private.startptr && (private.startptr % XLogSegSize) != 0)
|
|
printf("first record is after %X/%X, at %X/%X, skipping over %u bytes\n",
|
|
(uint32) (private.startptr >> 32), (uint32) private.startptr,
|
|
(uint32) (first_record >> 32), (uint32) first_record,
|
|
(uint32) (first_record - private.startptr));
|
|
|
|
for (;;)
|
|
{
|
|
/* try to read the next record */
|
|
record = XLogReadRecord(xlogreader_state, first_record, &errormsg);
|
|
if (!record)
|
|
{
|
|
if (!config.follow || private.endptr_reached)
|
|
break;
|
|
else
|
|
{
|
|
pg_usleep(1000000L); /* 1 second */
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* after reading the first record, continue at next one */
|
|
first_record = InvalidXLogRecPtr;
|
|
XLogDumpDisplayRecord(&config, xlogreader_state->ReadRecPtr, record);
|
|
|
|
/* check whether we printed enough */
|
|
if (config.stop_after_records > 0 &&
|
|
config.already_displayed_records >= config.stop_after_records)
|
|
break;
|
|
}
|
|
|
|
if (errormsg)
|
|
fatal_error("error in WAL record at %X/%X: %s\n",
|
|
(uint32) (xlogreader_state->ReadRecPtr >> 32),
|
|
(uint32) xlogreader_state->ReadRecPtr,
|
|
errormsg);
|
|
|
|
XLogReaderFree(xlogreader_state);
|
|
|
|
return EXIT_SUCCESS;
|
|
|
|
bad_argument:
|
|
fprintf(stderr, "Try \"%s --help\" for more information.\n", progname);
|
|
return EXIT_FAILURE;
|
|
}
|