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f4b0e187e9
NetBSD/usr.bin/patch/patch.c
kristerw f4b0e187e9 Fix some lint warnings.
2003-05-30 23:08:12 +00:00

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/* $NetBSD: patch.c,v 1.17 2003/05/30 23:08:13 kristerw Exp $ */
/* patch - a program to apply diffs to original files
*
* Copyright 1986, Larry Wall
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following condition
* is met:
* 1. Redistributions of source code must retain the above copyright
* notice, this condition and the following disclaimer.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: patch.c,v 1.17 2003/05/30 23:08:13 kristerw Exp $");
#endif /* not lint */
#include "INTERN.h"
#include "common.h"
#include "EXTERN.h"
#include "version.h"
#include "util.h"
#include "pch.h"
#include "inp.h"
#include "backupfile.h"
#include <stdlib.h>
#include <unistd.h>
/* procedures */
static void reinitialize_almost_everything(void);
static char *nextarg(void);
static int optcmp(const void *, const void *);
static char decode_long_option(char *);
static void get_some_switches(void);
static LINENUM locate_hunk(LINENUM);
static void abort_hunk(void);
static void apply_hunk(LINENUM);
static void init_output(char *);
static void init_reject(char *);
static void copy_till(LINENUM);
static void spew_output(void);
static void dump_line(LINENUM);
static bool patch_match(LINENUM, LINENUM, LINENUM);
static bool similar(char *, char *, size_t);
int main(int, char *[]);
/* TRUE if -E was specified on command line. */
static int remove_empty_files = FALSE;
/* TRUE if -R was specified on command line. */
static int reverse_flag_specified = FALSE;
/* Apply a set of diffs as appropriate. */
int
main(int argc, char *argv[])
{
LINENUM where = 0;
LINENUM newwhere;
LINENUM fuzz;
LINENUM mymaxfuzz;
int hunk = 0;
int failed = 0;
int failtotal = 0;
int i;
for (i = 0; i<MAXFILEC; i++)
filearg[i] = NULL;
myuid = getuid();
/* Cons up the names of the temporary files. */
{
/* Directory for temporary files. */
char *tmpdir;
size_t tmpname_len;
tmpdir = getenv ("TMPDIR");
if (tmpdir == NULL) {
tmpdir = "/tmp";
}
tmpname_len = strlen (tmpdir) + 20;
TMPOUTNAME = xmalloc(tmpname_len);
strcpy (TMPOUTNAME, tmpdir);
strcat (TMPOUTNAME, "/patchoXXXXXX");
if ((i = mkstemp(TMPOUTNAME)) < 0)
pfatal("can't create %s", TMPOUTNAME);
Close(i);
TMPINNAME = xmalloc(tmpname_len);
strcpy (TMPINNAME, tmpdir);
strcat (TMPINNAME, "/patchiXXXXXX");
if ((i = mkstemp(TMPINNAME)) < 0)
pfatal("can't create %s", TMPINNAME);
Close(i);
TMPREJNAME = xmalloc(tmpname_len);
strcpy (TMPREJNAME, tmpdir);
strcat (TMPREJNAME, "/patchrXXXXXX");
if ((i = mkstemp(TMPREJNAME)) < 0)
pfatal("can't create %s", TMPREJNAME);
Close(i);
TMPPATNAME = xmalloc(tmpname_len);
strcpy (TMPPATNAME, tmpdir);
strcat (TMPPATNAME, "/patchpXXXXXX");
if ((i = mkstemp(TMPPATNAME)) < 0)
pfatal("can't create %s", TMPPATNAME);
Close(i);
}
{
char *v;
v = getenv ("SIMPLE_BACKUP_SUFFIX");
if (v)
simple_backup_suffix = v;
else
simple_backup_suffix = ORIGEXT;
#ifndef NODIR
v = getenv ("VERSION_CONTROL");
backup_type = get_version (v); /* OK to pass NULL. */
#endif
}
/* parse switches */
Argc = argc;
Argv = argv;
get_some_switches();
/* make sure we clean up /tmp in case of disaster */
set_signals(0);
for (
open_patch_file(filearg[1]);
there_is_another_patch();
reinitialize_almost_everything()
) { /* for each patch in patch file */
if (!skip_rest_of_patch && outname == NULL)
outname = xstrdup(filearg[0]);
/* for ed script just up and do it and exit */
if (diff_type == ED_DIFF) {
do_ed_script();
continue;
}
/* initialize the patched file */
if (!skip_rest_of_patch)
init_output(TMPOUTNAME);
/* initialize reject file */
init_reject(TMPREJNAME);
/* find out where all the lines are */
if (!skip_rest_of_patch)
scan_input(filearg[0]);
/* from here on, open no standard i/o files, because malloc */
/* might misfire and we can't catch it easily */
/* apply each hunk of patch */
hunk = 0;
failed = 0;
while (another_hunk()) {
hunk++;
fuzz = Nulline;
mymaxfuzz = pch_context();
if (maxfuzz < mymaxfuzz)
mymaxfuzz = maxfuzz;
if (!skip_rest_of_patch) {
do {
where = locate_hunk(fuzz);
if (hunk == 1 && where == Nulline && !force) {
/* dwim for reversed patch? */
if (!pch_swap()) {
if (fuzz == Nulline)
say(
"Not enough memory to try swapped hunk! Assuming unswapped.\n");
continue;
}
reverse = !reverse;
where = locate_hunk(fuzz); /* try again */
if (where == Nulline) { /* didn't find it swapped */
if (!pch_swap()) /* put it back to normal */
fatal("lost hunk on alloc error!\n");
reverse = !reverse;
}
else if (noreverse) {
if (!pch_swap()) /* put it back to normal */
fatal("lost hunk on alloc error!\n");
reverse = !reverse;
say(
"Ignoring previously applied (or reversed) patch.\n");
skip_rest_of_patch = TRUE;
}
else if (batch) {
if (verbose)
say(
"%seversed (or previously applied) patch detected! %s -R.",
reverse ? "R" : "Unr",
reverse ? "Assuming" : "Ignoring");
}
else {
ask(
"%seversed (or previously applied) patch detected! %s -R? [y] ",
reverse ? "R" : "Unr",
reverse ? "Assume" : "Ignore");
if (*buf == 'n') {
ask("Apply anyway? [n] ");
if (*buf != 'y')
skip_rest_of_patch = TRUE;
where = Nulline;
reverse = !reverse;
if (!pch_swap()) /* put it back to normal */
fatal("lost hunk on alloc error!\n");
}
}
}
} while (!skip_rest_of_patch && where == Nulline &&
++fuzz <= mymaxfuzz);
if (skip_rest_of_patch) { /* just got decided */
Fclose(ofp);
ofp = NULL;
}
}
newwhere = pch_newfirst() + last_offset;
if (skip_rest_of_patch) {
abort_hunk();
failed++;
if (verbose)
say("Hunk #%d ignored at %d.\n", hunk, newwhere);
}
else if (where == Nulline) {
abort_hunk();
failed++;
if (verbose)
say("Hunk #%d failed at %d.\n", hunk, newwhere);
}
else {
apply_hunk(where);
if (verbose) {
say("Hunk #%d succeeded at %d", hunk, newwhere);
if (fuzz)
say(" with fuzz %d", fuzz);
if (last_offset)
say(" (offset %d line%s)",
last_offset, last_offset==1?"":"s");
say(".\n");
}
}
}
assert(hunk);
/* finish spewing out the new file */
if (!skip_rest_of_patch)
spew_output();
/* and put the output where desired */
ignore_signals();
if (!skip_rest_of_patch) {
struct stat statbuf;
char *realout = outname;
if (move_file(TMPOUTNAME, outname) < 0) {
toutkeep = TRUE;
realout = TMPOUTNAME;
chmod(TMPOUTNAME, filemode);
}
else
chmod(outname, filemode);
if (remove_empty_files && stat(realout, &statbuf) == 0
&& statbuf.st_size == 0) {
if (verbose)
say("Removing %s (empty after patching).\n", realout);
while (unlink(realout) >= 0) ; /* while is for Eunice. */
}
}
Fclose(rejfp);
rejfp = NULL;
if (failed) {
failtotal += failed;
if (outname != NULL) {
if (!*rejname) {
Strcpy(rejname, outname);
Strcat(rejname, REJEXT);
}
if (skip_rest_of_patch)
say("%d out of %d hunks ignored"
"--saving rejects to %s\n",
failed, hunk, rejname);
else
say("%d out of %d hunks failed"
"--saving rejects to %s\n",
failed, hunk, rejname);
if (move_file(TMPREJNAME, rejname) < 0)
trejkeep = TRUE;
} else
say("%d out of %d hunks ignored\n", failed, hunk);
}
set_signals(1);
}
my_exit(failtotal);
/* NOTREACHED */
}
/* Prepare to find the next patch to do in the patch file. */
static void
reinitialize_almost_everything(void)
{
re_patch();
re_input();
input_lines = 0;
last_frozen_line = 0;
filec = 0;
if (filearg[0] != NULL) {
free(filearg[0]);
filearg[0] = NULL;
}
if (outname != NULL) {
free(outname);
outname = NULL;
}
last_offset = 0;
diff_type = 0;
if (revision != NULL) {
free(revision);
revision = NULL;
}
reverse = reverse_flag_specified;
skip_rest_of_patch = FALSE;
get_some_switches();
if (filec >= 2)
fatal("you may not change to a different patch file\n");
}
static char *
nextarg(void)
{
if (!--Argc)
fatal("missing argument after `%s'\n", *Argv);
return *++Argv;
}
/* Module for handling of long options. */
struct option {
char *long_opt;
char short_opt;
};
static int
optcmp(const void *va, const void *vb)
{
const struct option *a = va, *b = vb;
return strcmp (a->long_opt, b->long_opt);
}
/* Decode Long options beginning with "--" to their short equivalents. */
static char
decode_long_option(char *opt)
{
/*
* This table must be sorted on the first field. We also decode
* unimplemented options as those will probably be dealt with
* later, anyhow.
*/
static struct option options[] = {
{ "batch", 't' },
{ "check", 'C' },
{ "context", 'c' },
{ "debug", 'x' },
{ "directory", 'd' },
{ "ed", 'e' },
{ "force", 'f' },
{ "forward", 'N' },
{ "fuzz", 'F' },
{ "ifdef", 'D' },
{ "ignore-whitespace", 'l' },
{ "normal", 'n' },
{ "output", 'o' },
{ "patchfile", 'i' },
{ "prefix", 'B' },
{ "quiet", 's' },
{ "reject-file", 'r' },
{ "remove-empty-files", 'E' },
{ "reverse", 'R' },
{ "silent", 's' },
{ "skip", 'S' },
{ "strip", 'p' },
{ "suffix", 'b' },
{ "unified", 'u' },
{ "version", 'v' },
{ "version-control", 'V' },
};
struct option key, *found;
key.long_opt = opt;
found = bsearch(&key, options,
sizeof(options) / sizeof(options[0]), sizeof(options[0]), optcmp);
return found ? found->short_opt : '\0';
}
/* Process switches and filenames up to next '+' or end of list. */
static void
get_some_switches(void)
{
char *s;
rejname[0] = '\0';
if (!Argc)
return;
for (Argc--,Argv++; Argc; Argc--,Argv++) {
s = Argv[0];
if (strEQ(s, "+")) {
return; /* + will be skipped by for loop */
}
if (*s != '-' || !s[1]) {
if (filec == MAXFILEC)
fatal("too many file arguments\n");
if (filec == 1 && filearg[filec] != NULL)
fatal("-i option and patchfile argument are mutually\
exclusive\n");
filearg[filec++] = xstrdup(s);
}
else {
char opt;
if (*(s + 1) == '-') {
opt = decode_long_option(s + 2);
s += strlen(s) - 1;
}
else
opt = *++s;
switch (opt) {
case 'b':
simple_backup_suffix = xstrdup(nextarg());
break;
case 'B':
origprae = xstrdup(nextarg());
break;
case 'c':
diff_type = CONTEXT_DIFF;
break;
case 'd':
if (!*++s)
s = nextarg();
if (chdir(s) < 0)
pfatal("can't cd to %s", s);
break;
case 'D':
do_defines = TRUE;
if (!*++s)
s = nextarg();
if (!isalpha((unsigned char)*s) && '_' != *s)
fatal("argument to -D is not an identifier\n");
Sprintf(if_defined, "#ifdef %s\n", s);
Sprintf(not_defined, "#ifndef %s\n", s);
Sprintf(end_defined, "#endif /* %s */\n", s);
break;
case 'e':
diff_type = ED_DIFF;
break;
case 'E':
remove_empty_files = TRUE;
break;
case 'f':
force = TRUE;
break;
case 'F':
if (*++s == '=')
s++;
maxfuzz = atoi(s);
break;
case 'i':
if (filearg[1] != NULL)
free(filearg[1]);
filearg[1] = xstrdup(nextarg());
break;
case 'l':
canonicalize = TRUE;
break;
case 'n':
diff_type = NORMAL_DIFF;
break;
case 'N':
noreverse = TRUE;
break;
case 'o':
outname = xstrdup(nextarg());
break;
case 'p':
if (*++s == '=')
s++;
strippath = atoi(s);
break;
case 'r':
Strcpy(rejname, nextarg());
break;
case 'R':
reverse = TRUE;
reverse_flag_specified = TRUE;
break;
case 's':
verbose = FALSE;
break;
case 'S':
skip_rest_of_patch = TRUE;
break;
case 't':
batch = TRUE;
break;
case 'u':
diff_type = UNI_DIFF;
break;
case 'v':
version();
break;
case 'V':
#ifndef NODIR
backup_type = get_version (nextarg ());
#endif
break;
#ifdef DEBUGGING
case 'x':
debug = atoi(s+1);
break;
#endif
default:
fprintf(stderr, "patch: unrecognized option `%s'\n", Argv[0]);
fprintf(stderr, "\
Usage: patch [options] [origfile [patchfile]] [+ [options] [origfile]]...\n\
Options:\n\
[-ceEflnNRsStuv] [-b backup-ext] [-B backup-prefix] [-d directory]\n\
[-D symbol] [-Fmax-fuzz] [-o out-file] [-p[strip-count]]\n\
[-r rej-name] [-V {numbered,existing,simple}]\n");
my_exit(1);
}
}
}
}
/* Attempt to find the right place to apply this hunk of patch. */
static LINENUM
locate_hunk(LINENUM fuzz)
{
LINENUM first_guess = pch_first() + last_offset;
LINENUM offset;
LINENUM pat_lines = pch_ptrn_lines();
LINENUM max_pos_offset = input_lines - first_guess
- pat_lines + 1;
LINENUM max_neg_offset = first_guess - last_frozen_line - 1
+ pch_context();
if (!pat_lines) /* null range matches always */
return first_guess;
if (max_neg_offset >= first_guess) /* do not try lines < 0 */
max_neg_offset = first_guess - 1;
if (first_guess <= input_lines && patch_match(first_guess, Nulline, fuzz))
return first_guess;
for (offset = 1; ; offset++) {
bool check_after = (offset <= max_pos_offset);
bool check_before = (offset <= max_neg_offset);
if (check_after && patch_match(first_guess, offset, fuzz)) {
#ifdef DEBUGGING
if (debug & 1)
say("Offset changing from %d to %d\n", last_offset, offset);
#endif
last_offset = offset;
return first_guess+offset;
}
else if (check_before && patch_match(first_guess, -offset, fuzz)) {
#ifdef DEBUGGING
if (debug & 1)
say("Offset changing from %d to %d\n", last_offset, -offset);
#endif
last_offset = -offset;
return first_guess-offset;
}
else if (!check_before && !check_after)
return Nulline;
}
}
/* We did not find the pattern, dump out the hunk so they can handle it. */
static void
abort_hunk(void)
{
LINENUM i;
LINENUM pat_end = pch_end();
/* add in last_offset to guess the same as the previous successful hunk */
LINENUM oldfirst = pch_first() + last_offset;
LINENUM newfirst = pch_newfirst() + last_offset;
LINENUM oldlast = oldfirst + pch_ptrn_lines() - 1;
LINENUM newlast = newfirst + pch_repl_lines() - 1;
char *stars = (diff_type >= NEW_CONTEXT_DIFF ? " ****" : "");
char *minuses = (diff_type >= NEW_CONTEXT_DIFF ? " ----" : " -----");
fprintf(rejfp, "***************\n");
for (i=0; i<=pat_end; i++) {
switch (pch_char(i)) {
case '*':
if (oldlast < oldfirst)
fprintf(rejfp, "*** 0%s\n", stars);
else if (oldlast == oldfirst)
fprintf(rejfp, "*** %d%s\n", oldfirst, stars);
else
fprintf(rejfp, "*** %d,%d%s\n", oldfirst, oldlast, stars);
break;
case '=':
if (newlast < newfirst)
fprintf(rejfp, "--- 0%s\n", minuses);
else if (newlast == newfirst)
fprintf(rejfp, "--- %d%s\n", newfirst, minuses);
else
fprintf(rejfp, "--- %d,%d%s\n", newfirst, newlast, minuses);
break;
case '\n':
fprintf(rejfp, "%s", pfetch(i));
break;
case ' ': case '-': case '+': case '!':
fprintf(rejfp, "%c %s", pch_char(i), pfetch(i));
break;
default:
fatal("fatal internal error in abort_hunk\n");
}
}
}
/* We found where to apply it (we hope), so do it. */
static void
apply_hunk(LINENUM where)
{
LINENUM old = 1;
LINENUM lastline = pch_ptrn_lines();
LINENUM new = lastline+1;
#define OUTSIDE 0
#define IN_IFNDEF 1
#define IN_IFDEF 2
#define IN_ELSE 3
int def_state = OUTSIDE;
bool R_do_defines = do_defines;
LINENUM pat_end = pch_end();
where--;
while (pch_char(new) == '=' || pch_char(new) == '\n')
new++;
while (old <= lastline) {
if (pch_char(old) == '-') {
copy_till(where + old - 1);
if (R_do_defines) {
if (def_state == OUTSIDE) {
fputs(not_defined, ofp);
def_state = IN_IFNDEF;
}
else if (def_state == IN_IFDEF) {
fputs(else_defined, ofp);
def_state = IN_ELSE;
}
fputs(pfetch(old), ofp);
}
last_frozen_line++;
old++;
}
else if (new > pat_end) {
break;
}
else if (pch_char(new) == '+') {
copy_till(where + old - 1);
if (R_do_defines) {
if (def_state == IN_IFNDEF) {
fputs(else_defined, ofp);
def_state = IN_ELSE;
}
else if (def_state == OUTSIDE) {
fputs(if_defined, ofp);
def_state = IN_IFDEF;
}
}
fputs(pfetch(new), ofp);
new++;
}
else if (pch_char(new) != pch_char(old)) {
say("Out-of-sync patch, lines %d,%d--mangled text or line numbers, maybe?\n",
pch_hunk_beg() + old,
pch_hunk_beg() + new);
#ifdef DEBUGGING
say("oldchar = '%c', newchar = '%c'\n",
pch_char(old), pch_char(new));
#endif
my_exit(1);
}
else if (pch_char(new) == '!') {
copy_till(where + old - 1);
if (R_do_defines) {
fputs(not_defined, ofp);
def_state = IN_IFNDEF;
}
while (pch_char(old) == '!') {
if (R_do_defines) {
fputs(pfetch(old), ofp);
}
last_frozen_line++;
old++;
}
if (R_do_defines) {
fputs(else_defined, ofp);
def_state = IN_ELSE;
}
while (pch_char(new) == '!') {
fputs(pfetch(new), ofp);
new++;
}
}
else {
assert(pch_char(new) == ' ');
old++;
new++;
if (R_do_defines && def_state != OUTSIDE) {
fputs(end_defined, ofp);
def_state = OUTSIDE;
}
}
}
if (new <= pat_end && pch_char(new) == '+') {
copy_till(where + old - 1);
if (R_do_defines) {
if (def_state == OUTSIDE) {
fputs(if_defined, ofp);
def_state = IN_IFDEF;
}
else if (def_state == IN_IFNDEF) {
fputs(else_defined, ofp);
def_state = IN_ELSE;
}
}
while (new <= pat_end && pch_char(new) == '+') {
fputs(pfetch(new), ofp);
new++;
}
}
if (R_do_defines && def_state != OUTSIDE) {
fputs(end_defined, ofp);
}
}
/* Open the new file. */
static void
init_output(char *name)
{
ofp = fopen(name, "w");
if (ofp == NULL)
pfatal("can't create %s", name);
}
/* Open a file to put hunks we can't locate. */
static void
init_reject(char *name)
{
rejfp = fopen(name, "w");
if (rejfp == NULL)
pfatal("can't create %s", name);
}
/* Copy input file to output, up to wherever hunk is to be applied. */
static void
copy_till(LINENUM lastline)
{
LINENUM R_last_frozen_line = last_frozen_line;
if (R_last_frozen_line > lastline)
fatal("misordered hunks! output would be garbled\n");
while (R_last_frozen_line < lastline) {
dump_line(++R_last_frozen_line);
}
last_frozen_line = R_last_frozen_line;
}
/* Finish copying the input file to the output file. */
static void
spew_output(void)
{
#ifdef DEBUGGING
if (debug & 256)
say("il=%d lfl=%d\n",input_lines,last_frozen_line);
#endif
if (input_lines)
copy_till(input_lines); /* dump remainder of file */
Fclose(ofp);
ofp = NULL;
}
/* Copy one line from input to output. */
static void
dump_line(LINENUM line)
{
char *s;
char R_newline = '\n';
/* Note: string is not null terminated. */
for (s=ifetch(line); putc(*s, ofp) != R_newline; s++) ;
}
/* Does the patch pattern match at line base+offset? */
static bool
patch_match(LINENUM base, LINENUM offset, LINENUM fuzz)
{
LINENUM pline = 1 + fuzz;
LINENUM iline;
LINENUM pat_lines = pch_ptrn_lines() - fuzz;
for (iline=base+offset+fuzz; pline <= pat_lines; pline++,iline++) {
if (canonicalize) {
if (!similar(ifetch(iline),
pfetch(pline),
pch_line_len(pline) ))
return FALSE;
}
else if (strnNE(ifetch(iline),
pfetch(pline),
pch_line_len(pline) ))
return FALSE;
}
return TRUE;
}
/* Do two lines match with canonicalized white space? */
static bool
similar(char *a, char *b, size_t len)
{
while (len) {
if (isspace((unsigned char)*b)) {/* whitespace (or \n) to match? */
if (!isspace((unsigned char)*a))/* no corresponding whitespace? */
return FALSE;
while (len && isspace((unsigned char)*b) && *b != '\n')
b++,len--; /* skip pattern whitespace */
while (isspace((unsigned char)*a) && *a != '\n')
a++; /* skip target whitespace */
if (*a == '\n' || *b == '\n')
return (*a == *b); /* should end in sync */
}
else if (*a++ != *b++) /* match non-whitespace chars */
return FALSE;
else
len--; /* probably not necessary */
}
return TRUE; /* actually, this is not reached */
/* since there is always a \n */
}
/* Exit with cleanup. */
void
my_exit(int status)
{
Unlink(TMPINNAME);
if (!toutkeep) {
Unlink(TMPOUTNAME);
}
if (!trejkeep) {
Unlink(TMPREJNAME);
}
Unlink(TMPPATNAME);
exit(status);
}
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