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enable numbered backups via -B.old%02d

This commit is contained in:
hubertf 1999-01-26 01:34:25 +00:00
parent 7f1c203c11
commit 5f648bdae3
2 changed files with 49 additions and 14 deletions
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11
usr.bin/xinstall/install.1
View File

@ -1,4 +1,4 @@
.\" $NetBSD: install.1,v 1.13 1999/01/25 01:42:57 hubertf Exp $
.\" $NetBSD: install.1,v 1.14 1999/01/26 01:34:25 hubertf Exp $
.\"
.\" Copyright (c) 1987, 1990, 1993
.\" The Regents of the University of California. All rights reserved.
@ -103,7 +103,14 @@ Use
.Ar suffix
as the backup suffix if
.Fl b
is given.
is given. If
.Ar suffix
contains a '%' sign, a numbered backup will be performed, and the
%-pattern will be expanded using
.Xr sprintf 3 ,
given an integer counter as the backup number.
The counter used starts from 0, and the first available name resulting
from the expansion is used.
.It Fl c
Copy the file.
This flag turns off the default behavior of

52
usr.bin/xinstall/xinstall.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: xinstall.c,v 1.31 1999/01/25 01:42:57 hubertf Exp $ */
/* $NetBSD: xinstall.c,v 1.32 1999/01/26 01:34:25 hubertf Exp $ */
/*
* Copyright (c) 1987, 1993
@ -43,7 +43,7 @@ __COPYRIGHT("@(#) Copyright (c) 1987, 1993\n\
#if 0
static char sccsid[] = "@(#)xinstall.c 8.1 (Berkeley) 7/21/93";
#else
__RCSID("$NetBSD: xinstall.c,v 1.31 1999/01/25 01:42:57 hubertf Exp $");
__RCSID("$NetBSD: xinstall.c,v 1.32 1999/01/26 01:34:25 hubertf Exp $");
#endif
#endif /* not lint */
@ -94,6 +94,7 @@ void makelink __P((char *, char *));
void install __P((char *, char *, u_long, u_int));
void install_dir __P((char *));
void strip __P((char *));
void backup __P((const char *));
void usage __P((void));
int main __P((int, char *[]));
@ -241,11 +242,9 @@ main(argc, argv)
if (to_sb.st_flags & NOCHANGEBITS)
(void)chflags(to_name,
to_sb.st_flags & ~(NOCHANGEBITS));
if (dobackup) {
char backup[FILENAME_MAX];
(void)snprintf(backup, FILENAME_MAX, "%s%s", to_name, suffix);
(void)rename(to_name, backup);
} else
if (dobackup)
backup(to_name);
else
(void)unlink(to_name);
}
install(*argv, to_name, fset, iflags);
@ -360,11 +359,9 @@ install(from_name, to_name, fset, flags)
if (stat(to_name, &to_sb) == 0 &&
to_sb.st_flags & (NOCHANGEBITS))
(void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS));
if (dobackup) {
char backup[FILENAME_MAX];
(void)snprintf(backup, FILENAME_MAX, "%s%s", to_name, suffix);
(void)rename(to_name, backup);
} else
if (dobackup)
backup(to_name);
else
(void)unlink(to_name);
if (dolink) {
@ -529,6 +526,37 @@ strip(to_name)
}
}
/*
* backup file "to_name" to to_name.suffix
* if suffix contains a "%", it's taken as a printf(3) pattern
* used for a numbered backup.
*/
void
backup(to_name)
const char *to_name;
{
char backup[FILENAME_MAX];
if (strchr(suffix, '%')) {
/* Do numbered backup */
int cnt;
char suffix_expanded[FILENAME_MAX];
cnt=0;
do {
(void)snprintf(suffix_expanded, FILENAME_MAX, suffix, cnt);
(void)snprintf(backup, FILENAME_MAX, "%s%s",
to_name, suffix_expanded);
cnt++;
} while (access(backup, F_OK)==0);
} else {
/* Do simple backup */
(void)snprintf(backup, FILENAME_MAX, "%s%s", to_name, suffix);
}
(void)rename(to_name, backup);
}
/*
* install_dir --
* build directory heirarchy