svn commit: r338646 - head/bin/dd

[Kyle Evans]

Author: kevans
Date: Thu Sep 13 14:54:46 2018
New Revision: 338646
URL: https://svnweb.freebsd.org/changeset/base/338646

Log:
  dd(1): Correct padding in status=progress
  
  Output padding is specified via outlen, which is set using the return value
  of fprintf. Because it's printing that padding plus a trailing byte, it
  grows by one each iteration rather than reflecting actual length.
  
  Additionally, iec was sized improperly for scaling up similarly to si.
  Fixing this revealed that the humanize_number(3) call to populate persec
  was using the wrong width.
  
  Submitted by:	Thomas Hurst <tom at hur.st>
  Reviewed by:	imp
  Approved by:	re (kib)
  Differential Revision:	https://reviews.freebsd.org/D16960

Modified:
  head/bin/dd/misc.c

Modified: head/bin/dd/misc.c
==============================================================================
--- head/bin/dd/misc.c	Thu Sep 13 14:53:51 2018	(r338645)
+++ head/bin/dd/misc.c	Thu Sep 13 14:54:46 2018	(r338646)
@@ -111,7 +111,7 @@ progress(void)
 {
 	static int outlen;
 	char si[4 + 1 + 2 + 1];		/* 123 <space> <suffix> NUL */
-	char iec[4 + 1 + 2 + 1];	/* 123 <space> <suffix> NUL */
+	char iec[4 + 1 + 3 + 1];	/* 123 <space> <suffix> NUL */
 	char persec[4 + 1 + 2 + 1];	/* 123 <space> <suffix> NUL */
 	char *buf;
 	double secs;
@@ -121,11 +121,11 @@ progress(void)
 	    HN_DECIMAL | HN_DIVISOR_1000);
 	humanize_number(iec, sizeof(iec), (int64_t)st.bytes, "B", HN_AUTOSCALE,
 	    HN_DECIMAL | HN_IEC_PREFIXES);
-	humanize_number(persec, sizeof(iec), (int64_t)(st.bytes / secs), "B",
+	humanize_number(persec, sizeof(persec), (int64_t)(st.bytes / secs), "B",
 	    HN_AUTOSCALE, HN_DECIMAL | HN_DIVISOR_1000);
 	asprintf(&buf, "  %'ju bytes (%s, %s) transferred %.3fs, %s/s",
 	    (uintmax_t)st.bytes, si, iec, secs, persec);
-	outlen = fprintf(stderr, "%-*s\r", outlen, buf);
+	outlen = fprintf(stderr, "%-*s\r", outlen, buf) - 1;
 	fflush(stderr);
 	free(buf);
 	need_progress = 0;