svn commit: r226520 - head/sbin/dump

[Kirk McKusick]

Author: mckusick
Date: Tue Oct 18 18:42:26 2011
New Revision: 226520
URL: http://svn.freebsd.org/changeset/base/226520

Log:
  The current /etc/dumpdates file restricts device names to 32 characters.
  With the addition of various GEOM layers some device names now exceed
  this length, for example /dev/mirror/encrypted.elig.journal. This
  change expands the field to 53 bytes which brings the /etc/dumpdates
  lines to 80 characters. Exceeding 80 characters makes the /etc/dumpdates
  file much less human readable. A test is added to dump so that it
  verifies that the device name will fit in the 53 character field
  failing the dump if it is too long.
  
  This change has been checked to verify that its /etc/dumpdates file
  is compatible with older versions of dump.
  
  Reported by: Martin Sugioarto <martin at sugioarto.com>
  PR:          kern/160678
  MFC after:   3 weeks

Modified:
  head/sbin/dump/dump.h
  head/sbin/dump/itime.c

Modified: head/sbin/dump/dump.h
==============================================================================
--- head/sbin/dump/dump.h	Tue Oct 18 17:38:25 2011	(r226519)
+++ head/sbin/dump/dump.h	Tue Oct 18 18:42:26 2011	(r226520)
@@ -171,9 +171,10 @@ void	putdumptime(void);
     	if (ddatev != NULL) \
 		for (ddp = ddatev[i = 0]; i < nddates; ddp = ddatev[++i])
 
-#define	DUMPOUTFMT	"%-32s %d %s"		/* for printf */
+#define	DUMPFMTLEN	53			/* max device pathname length */
+#define	DUMPOUTFMT	"%-*s %d %s"		/* for printf */
 						/* name, level, ctime(date) */
-#define	DUMPINFMT	"%32s %d %[^\n]\n"	/* inverse for scanf */
+#define	DUMPINFMT	"%s %d %[^\n]\n"	/* inverse for scanf */
 
 void	sig(int signo);
 

Modified: head/sbin/dump/itime.c
==============================================================================
--- head/sbin/dump/itime.c	Tue Oct 18 17:38:25 2011	(r226519)
+++ head/sbin/dump/itime.c	Tue Oct 18 18:42:26 2011	(r226520)
@@ -222,7 +222,10 @@ static void
 dumprecout(FILE *file, const struct dumpdates *what)
 {
 
-	if (fprintf(file, DUMPOUTFMT, what->dd_name,
+	if (strlen(what->dd_name) > DUMPFMTLEN)
+		quit("Name '%s' exceeds DUMPFMTLEN (%d) bytes\n",
+		    what->dd_name, DUMPFMTLEN);
+	if (fprintf(file, DUMPOUTFMT, DUMPFMTLEN, what->dd_name,
 	      what->dd_level, ctime(&what->dd_ddate)) < 0)
 		quit("%s: %s\n", dumpdates, strerror(errno));
 }