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Date: Mon, 6 Nov 2017 14:21:12 -0500
From: Wyllys Ingersoll <wyllys.ingersoll@...pertech.com>
To: linux-ext4@...r.kernel.org
Subject: Re: [PATCH] badblocks: Add options for parseable status output
(Resubmitting with proper formatting)
This patch adds a couple of new command line arguments
to make it easier to control the frequency of the status output and make the
output more parseable.
[-a alarm_interval ] Control the frequency of status output (in seconds)
[-P] makes the output more parseable by external programs
(comma separated, LF terminated)
Signed-off-by: Wyllys Ingersoll <wyllys.ingersoll@...pertech.com>
---
misc/badblocks.8.in | 16 +++++++++++++++-
misc/badblocks.c | 52
++++++++++++++++++++++++++++++++++++++--------------
2 files changed, 53 insertions(+), 15 deletions(-)
diff --git a/misc/badblocks.8.in b/misc/badblocks.8.in
index ca4359382..043e420db 100644
--- a/misc/badblocks.8.in
+++ b/misc/badblocks.8.in
@@ -5,7 +5,11 @@ badblocks \- search a device for bad blocks
.SH SYNOPSIS
.B badblocks
[
-.B \-svwnfBX
+.B \-svwnfBXP
+]
+[
+.B \-a
+.I alarm_interval
]
[
.B \-b
@@ -83,6 +87,9 @@ and
programs.
.SH OPTIONS
.TP
+.BI \-a " alarm_interval"
+Interval (in seconds) used for displaying status updates. The default is 1.
+.TP
.BI \-b " block_size"
Specify the size of blocks in bytes. The default is 1024.
.TP
@@ -199,6 +206,13 @@ option, as they are mutually exclusive.
.B \-B
Use buffered I/O and do not use Direct I/O, even if it is available.
.TP
+.B \-P
+Display status in machine parseable format. The data is comma separated and
+LF terminated to make it easier to parsing by external applications. The
+data format is:
+% completed, time elapsed, read errors, write errors, corruption errors.
+Example: 10.06, 1:22, 0, 0, 0
+.TP
.B \-X
Internal flag only to be used by
.BR e2fsck (8)
diff --git a/misc/badblocks.c b/misc/badblocks.c
index e45939187..571856c21 100644
--- a/misc/badblocks.c
+++ b/misc/badblocks.c
@@ -84,6 +84,8 @@ static int t_max; /* allocated test patterns */
static unsigned int *t_patts; /* test patterns */
static int use_buffered_io;
static int exclusive_ok;
+static int parseable_output = 0; /* print output that can be easily
parsed */
+static int alarm_interval = 1;
static unsigned int max_bb = MAX_BAD_BLOCKS; /* Abort test if more
than this
* number of bad blocks has been
* encountered */
@@ -97,9 +99,10 @@ static unsigned int sys_page_size = 4096;
static void usage(void)
{
fprintf(stderr, _(
-"Usage: %s [-b block_size] [-i input_file] [-o output_file] [-svwnf]\n"
+"Usage: %s [-b block_size] [-i input_file] [-o output_file] [-svwnfP]\n"
" [-c blocks_at_once] [-d delay_factor_between_reads] [-e
max_bad_blocks]\n"
" [-p num_passes] [-t test_pattern [-t test_pattern [...]]]\n"
+" [-a alarm_interval]\n"
" device [last_block [first_block]]\n"),
program_name);
exit (1);
@@ -223,17 +226,23 @@ static void print_status(void)
wchar_t wline_buf[128];
#endif
int len;
+ char format_str[128];
+
+ if (parseable_output) {
+ strcpy(format_str, "%6.2f, %s, %d, %d, %d");
+ } else {
+ strcpy(format_str, "%6.2f%% done, %s elapsed. (%d/%d/%d errors)");
+ }
gettimeofday(&time_end, 0);
len = snprintf(line_buf, sizeof(line_buf),
- _("%6.2f%% done, %s elapsed. "
- "(%d/%d/%d errors)"),
- calc_percent((unsigned long) currently_testing,
- (unsigned long) num_blocks),
- time_diff_format(&time_end, &time_start, diff_buf),
- num_read_errors,
- num_write_errors,
- num_corruption_errors);
+ _(format_str),
+ calc_percent((unsigned long) currently_testing,
+ (unsigned long) num_blocks),
+ time_diff_format(&time_end, &time_start, diff_buf),
+ num_read_errors,
+ num_write_errors,
+ num_corruption_errors);
#ifdef HAVE_MBSTOWCS
mbstowcs(wline_buf, line_buf, sizeof(line_buf));
len = wcswidth(wline_buf, sizeof(line_buf));
@@ -241,16 +250,20 @@ static void print_status(void)
len = strlen(line_buf); /* Should never happen... */
#endif
fputs(line_buf, stderr);
- memset(line_buf, '\b', len);
- line_buf[len] = 0;
- fputs(line_buf, stderr);
+ if (!parseable_output) {
+ memset(line_buf, '\b', len);
+ line_buf[len] = 0;
+ fputs(line_buf, stderr);
+ } else {
+ fputs("\n", stderr);
+ }
fflush (stderr);
}
static void alarm_intr(int alnum EXT2FS_ATTR((unused)))
{
signal (SIGALRM, alarm_intr);
- alarm(1);
+ alarm(alarm_interval);
if (!num_blocks)
return;
print_status();
@@ -1094,7 +1107,7 @@ int main (int argc, char ** argv)
if (argc && *argv)
program_name = *argv;
- while ((c = getopt (argc, argv, "b:d:e:fi:o:svwnc:p:h:t:BX")) != EOF) {
+ while ((c = getopt (argc, argv, "a:b:d:e:fi:o:svwnc:p:h:t:BXP")) !=
EOF) {
switch (c) {
case 'b':
block_size = parse_uint(optarg, "block size");
@@ -1183,6 +1196,17 @@ int main (int argc, char ** argv)
case 'X':
exclusive_ok++;
break;
+ case 'P':
+ parseable_output = 1;
+ break;
+ case 'a':
+ alarm_interval = parse_uint(optarg, "status alarm interval
(seconds)");
+ if (alarm_interval == 0) {
+ com_err(program_name, 0, "%s",
+ _("Minimum alarm interval is 1 second"));
+ exit(1);
+ }
+ break;
default:
usage();
}
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