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Index: head/usr.bin/indent/indent.1
===================================================================
--- head/usr.bin/indent/indent.1
+++ head/usr.bin/indent/indent.1
@@ -30,7 +30,7 @@
.\" @(#)indent.1 8.1 (Berkeley) 7/1/93
.\" $FreeBSD$
.\"
-.Dd July 25, 2017
+.Dd August 7, 2017
.Dt INDENT 1
.Os
.Sh NAME
@@ -119,7 +119,10 @@
is named
.Sq Pa /blah/blah/file ,
the backup file is named
-.Sq Pa file.BAK .
+.Sq Pa file.BAK
+by default. The extension used for the backup file may be overridden using the
+.Ev SIMPLE_BACKUP_SUFFIX
+environment variable.
.Pp
If
.Ar output-file
Index: head/usr.bin/indent/indent.c
===================================================================
--- head/usr.bin/indent/indent.c
+++ head/usr.bin/indent/indent.c
@@ -71,6 +71,8 @@
* file */
const char *out_name = "Standard Output"; /* will always point to name
* of output file */
+const char *simple_backup_suffix = ".BAK"; /* Suffix to use for backup
+ * files */
char bakfile[MAXPATHLEN] = "";
int
@@ -99,8 +101,8 @@
int last_else = 0; /* true iff last keyword was an else */
const char *profile_name = NULL;
+ const char *envval = NULL;
-
/*-----------------------------------------------*\
| INITIALIZATION |
\*-----------------------------------------------*/
@@ -160,6 +162,10 @@
output = NULL;
tabs_to_var = 0;
+ envval = getenv("SIMPLE_BACKUP_SUFFIX");
+ if (envval)
+ simple_backup_suffix = envval;
+
/*--------------------------------------------------*\
| COMMAND LINE SCAN |
\*--------------------------------------------------*/
@@ -1234,7 +1240,7 @@
p--;
if (*p == '/')
p++;
- sprintf(bakfile, "%s.BAK", p);
+ sprintf(bakfile, "%s%s", p, simple_backup_suffix);
/* copy in_name to backup file */
bakchn = creat(bakfile, 0600);

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