jimzah/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src.git synced 2024-11-28 09:02:44 +00:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity

Add a -o outfile option, which can be used to specify an output file. The

Browse Source 
file can safely be the same as the input file.  Idea from IRIX unifdef(1).
This version fixes a bug in the NetBSD unifdef which refuses to
write to a -o outfile which does not exist.

Obtained from: NetBSD
This commit is contained in:
Tony Finch 2010-01-19 18:13:54 +00:00
parent 13c18821fa
commit 4992d459a5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=202635
2 changed files with 119 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
usr.bin/unifdef/unifdef.1
View File

@ -1,6 +1,6 @@
.\" Copyright (c) 1985, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\" Copyright (c) 2002 - 2009 Tony Finch <dot@dotat.at>. All rights reserved.
.\" Copyright (c) 2002 - 2010 Tony Finch <dot@dotat.at>. All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" Dave Yost. It was rewritten to support ANSI C by Tony Finch.
@ -30,10 +30,10 @@
.\" SUCH DAMAGE.
.\"
.\" @(#)unifdef.1 8.2 (Berkeley) 4/1/94
.\" $dotat: unifdef/unifdef.1,v 1.60 2009/11/25 00:11:02 fanf2 Exp $
.\" $dotat: unifdef/unifdef.1,v 1.62 2010/01/19 17:33:53 fanf2 Exp $
.\" $FreeBSD$
.\"
.Dd September 24, 2002
.Dd January 19, 2010
.Dt UNIFDEF 1
.Os
.Sh NAME
@ -48,7 +48,8 @@
.Op Fl iD Ns Ar sym Ns Op = Ns Ar val
.Op Fl iU Ns Ar sym
.Ar ...
.Op Ar file
.Op Fl o Ar outfile
.Op Ar infile
.Nm unifdefall
.Op Fl I Ns Ar path
.Ar ...
@ -254,6 +255,18 @@ directives to the output following any deleted lines,
so that errors produced when compiling the output file correspond to
line numbers in the input file.
.Pp
.It Fl o Ar outfile
Write output to the file
.Ar outfile
instead of the standard output.
If
.Ar outfile
is the same as the input file,
the output is written to a temporary file
which is renamed into place when
.Nm
completes successfully.
.Pp
.It Fl s
Instead of processing the input file as usual,
this option causes

128
usr.bin/unifdef/unifdef.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2002 - 2009 Tony Finch <dot@dotat.at>
* Copyright (c) 2002 - 2010 Tony Finch <dot@dotat.at>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -24,27 +24,14 @@
*/
/*
* unifdef - remove ifdef'ed lines
*
* This code was derived from software contributed to Berkeley by Dave Yost.
* It was rewritten to support ANSI C by Tony Finch. The original version
* of unifdef carried the 4-clause BSD copyright licence. None of its code
* remains in this version (though some of the names remain) so it now
* carries a more liberal licence.
*
* The latest version is available from http://dotat.at/prog/unifdef
*/
#include <sys/cdefs.h>
#ifdef __IDSTRING
__IDSTRING(dotat, "$dotat: unifdef/unifdef.c,v 1.190 2009/11/27 17:21:26 fanf2 Exp $");
#endif
#ifdef __FBSDID
__FBSDID("$FreeBSD$");
#endif
/*
* unifdef - remove ifdef'ed lines
*
* Wishlist:
* provide an option which will append the name of the
* appropriate symbol after #else's and #endif's
@ -56,8 +43,12 @@ __FBSDID("$FreeBSD$");
* also make it possible to handle all "dodgy" directives correctly.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
@ -65,6 +56,13 @@ __FBSDID("$FreeBSD$");
#include <string.h>
#include <unistd.h>
#ifdef __IDSTRING
__IDSTRING(dotat, "$dotat: unifdef/unifdef.c,v 1.193 2010/01/19 18:03:02 fanf2 Exp $");
#endif
#ifdef __FBSDID
__FBSDID("$FreeBSD$");
#endif
/* types of input lines: */
typedef enum {
LT_TRUEI, /* a true #if with ignore flag */
@ -156,6 +154,11 @@ static char const * const linestate_name[] = {
*/
#define EDITSLOP 10
/*
* For temporary filenames
*/
#define TEMPLATE "unifdef.XXXXXX"
/*
* Globals.
*/
@ -179,6 +182,10 @@ static int nsyms; /* number of symbols */
static FILE *input; /* input file pointer */
static const char *filename; /* input file name */
static int linenum; /* current line number */
static FILE *output; /* output file pointer */
static const char *ofilename; /* output file name */
static bool overwriting; /* output overwrites input */
static char tempname[FILENAME_MAX]; /* used when overwriting */
static char tline[MAXLINE+EDITSLOP];/* input buffer plus space */
static char *keyword; /* used for editing #elif's */
@ -197,6 +204,7 @@ static bool constexpr; /* constant #if expression */
static int exitstat; /* program exit status */
static void addsym(bool, bool, char *);
static void closeout(void);
static void debug(const char *, ...);
static void done(void);
static void error(const char *);
@ -227,7 +235,7 @@ main(int argc, char *argv[])
{
int opt;
while ((opt = getopt(argc, argv, "i:D:U:I:BbcdeKklnst")) != -1)
while ((opt = getopt(argc, argv, "i:D:U:I:o:BbcdeKklnst")) != -1)
switch (opt) {
case 'i': /* treat stuff controlled by these symbols as text */
/*
@ -277,6 +285,9 @@ main(int argc, char *argv[])
case 'n': /* add #line directive after deleted lines */
lnnum = true;
break;
case 'o': /* output to a file */
ofilename = optarg;
break;
case 's': /* only output list of symbols that control #ifs */
symlist = true;
break;
@ -301,6 +312,43 @@ main(int argc, char *argv[])
filename = "[stdin]";
input = stdin;
}
if (ofilename == NULL) {
output = stdout;
} else {
struct stat ist, ost;
memset(&ist, 0, sizeof(ist));
memset(&ost, 0, sizeof(ost));
if (fstat(fileno(input), &ist) != 0)
err(2, "can't fstat %s", filename);
if (stat(ofilename, &ost) != 0 && errno != ENOENT)
warn("can't stat %s", ofilename);
overwriting = (ist.st_dev == ost.st_dev
&& ist.st_ino == ost.st_ino);
if (overwriting) {
const char *dirsep;
int ofd;
dirsep = strrchr(ofilename, '/');
if (dirsep != NULL)
snprintf(tempname, sizeof(tempname),
"%.*s/" TEMPLATE,
dirsep - ofilename, ofilename);
else
strlcpy(tempname, TEMPLATE, sizeof(tempname));
ofd = mkstemp(tempname);
if (ofd != -1)
output = fdopen(ofd, "w+");
if (output == NULL)
err(2, "can't create temporary file");
fchmod(ofd, ist.st_mode & ACCESSPERMS);
} else {
output = fopen(ofilename, "w");
if (output == NULL)
err(2, "can't open %s", ofilename);
}
}
process();
abort(); /* bug */
}
@ -435,13 +483,6 @@ static state_fn * const trans_table[IS_COUNT][LT_COUNT] = {
* State machine utility functions
*/
static void
done(void)
{
if (incomment)
error("EOF in comment");
exit(exitstat);
}
static void
ignoreoff(void)
{
if (depth == 0)
@ -498,13 +539,13 @@ flushline(bool keep)
} else {
if (lnnum && delcount > 0)
printf("#line %d\n", linenum);
fputs(tline, stdout);
fputs(tline, output);
delcount = 0;
blankmax = blankcount = blankline ? blankcount + 1 : 0;
}
} else {
if (lnblank)
putc('\n', stdout);
putc('\n', output);
exitstat = 1;
delcount += 1;
blankcount = 0;
@ -532,6 +573,40 @@ process(void)
}
}
/*
* Flush the output and handle errors.
*/
static void
closeout(void)
{
if (fclose(output) == EOF) {
warn("couldn't write to output");
if (overwriting) {
unlink(tempname);
errx(2, "%s unchanged", filename);
} else {
exit(2);
}
}
}
/*
* Clean up and exit.
*/
static void
done(void)
{
if (incomment)
error("EOF in comment");
closeout();
if (overwriting && rename(tempname, filename) == -1) {
warn("couldn't rename temporary file");
unlink(tempname);
errx(2, "%s unchanged", filename);
}
exit(exitstat);
}
/*
* Parse a line and determine its type. We keep the preprocessor line
* parser state between calls in the global variable linestate, with
@ -1097,5 +1172,6 @@ error(const char *msg)
else
warnx("%s: %d: %s (#if line %d depth %d)",
filename, linenum, msg, stifline[depth], depth);
closeout();
errx(2, "output may be truncated");
}