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BSD 4_3 release
[unix-history] / usr / contrib / mh / miscellany / patch / patch.c
#ifndef lint
static char sccsid[] = "@(#)patch.c 5.3 (Berkeley) 8/16/85";
#endif not lint
/* patch - a program to apply diffs to original files
*
* $Header: patch.c,v 1.3 85/03/26 15:07:43 lwall Exp $
*
* Copyright 1984, Larry Wall
*
* This program may be copied as long as you don't try to make any
* money off of it, or pretend that you wrote it.
*
* $Log: patch.c,v $
* 85/08/15 van%ucbmonet@berkeley
* Changes for 4.3bsd diff -c.
*
* Revision 1.3 85/03/26 15:07:43 lwall
* Frozen.
*
* Revision 1.2.1.9 85/03/12 17:03:35 lwall
* Changed pfp->_file to fileno(pfp).
*
* Revision 1.2.1.8 85/03/12 16:30:43 lwall
* Check i_ptr and i_womp to make sure they aren't null before freeing.
* Also allow ed output to be suppressed.
*
* Revision 1.2.1.7 85/03/12 15:56:13 lwall
* Added -p option from jromine@uci-750a.
*
* Revision 1.2.1.6 85/03/12 12:12:51 lwall
* Now checks for normalness of file to patch.
*
* Revision 1.2.1.5 85/03/12 11:52:12 lwall
* Added -D (#ifdef) option from joe@fluke.
*
* Revision 1.2.1.4 84/12/06 11:14:15 lwall
* Made smarter about SCCS subdirectories.
*
* Revision 1.2.1.3 84/12/05 11:18:43 lwall
* Added -l switch to do loose string comparison.
*
* Revision 1.2.1.2 84/12/04 09:47:13 lwall
* Failed hunk count not reset on multiple patch file.
*
* Revision 1.2.1.1 84/12/04 09:42:37 lwall
* Branch for sdcrdcf changes.
*
* Revision 1.2 84/11/29 13:29:51 lwall
* Linted. Identifiers uniqified. Fixed i_ptr malloc() bug. Fixed
* multiple calls to mktemp(). Will now work on machines that can only
* read 32767 chars. Added -R option for diffs with new and old swapped.
* Various cosmetic changes.
*
* Revision 1.1 84/11/09 17:03:58 lwall
* Initial revision
*
*/
#define DEBUGGING
/* shut lint up about the following when return value ignored */
#define Signal (void)signal
#define Unlink (void)unlink
#define Lseek (void)lseek
#define Fseek (void)fseek
#define Fstat (void)fstat
#define Pclose (void)pclose
#define Close (void)close
#define Fclose (void)fclose
#define Fflush (void)fflush
#define Sprintf (void)sprintf
#define Mktemp (void)mktemp
#define Strcpy (void)strcpy
#define Strcat (void)strcat
#include <stdio.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <signal.h>
/* constants */
#define TRUE (1)
#define FALSE (0)
#define MAXHUNKSIZE 500
#define MAXLINELEN 1024
#define BUFFERSIZE 1024
#define ORIGEXT ".orig"
#define SCCSPREFIX "s."
#define GET "get -e %s"
#define RCSSUFFIX ",v"
#define CHECKOUT "co -l %s"
/* handy definitions */
#define Null(t) ((t)0)
#define Nullch Null(char *)
#define Nullfp Null(FILE *)
#define Ctl(ch) (ch & 037)
#define strNE(s1,s2) (strcmp(s1,s2))
#define strEQ(s1,s2) (!strcmp(s1,s2))
#define strnNE(s1,s2,l) (strncmp(s1,s2,l))
#define strnEQ(s1,s2,l) (!strncmp(s1,s2,l))
/* typedefs */
typedef char bool;
typedef long LINENUM; /* must be signed */
typedef unsigned MEM; /* what to feed malloc */
/* globals */
int Argc; /* guess */
char **Argv;
struct stat filestat; /* file statistics area */
char serrbuf[BUFSIZ]; /* buffer for stderr */
char buf[MAXLINELEN]; /* general purpose buffer */
FILE *pfp = Nullfp; /* patch file pointer */
FILE *ofp = Nullfp; /* output file pointer */
FILE *rejfp = Nullfp; /* reject file pointer */
LINENUM input_lines = 0; /* how long is input file in lines */
LINENUM last_frozen_line = 0; /* how many input lines have been */
/* irretractibly output */
#define MAXFILEC 2
int filec = 0; /* how many file arguments? */
char *filearg[MAXFILEC];
char *outname = Nullch;
char rejname[128];
char *origext = Nullch;
char TMPOUTNAME[] = "/tmp/patchoXXXXXX";
char TMPINNAME[] = "/tmp/patchiXXXXXX"; /* you might want /usr/tmp here */
char TMPREJNAME[] = "/tmp/patchrXXXXXX";
char TMPPATNAME[] = "/tmp/patchpXXXXXX";
LINENUM last_offset = 0;
#ifdef DEBUGGING
int debug = 0;
#endif
bool verbose = TRUE;
bool reverse = FALSE;
bool usepath = FALSE;
bool canonicalize = FALSE;
#define CONTEXT_DIFF 1
#define NORMAL_DIFF 2
#define ED_DIFF 3
#define NEW_CONTEXT_DIFF 4
int diff_type = 0;
int do_defines = 0; /* patch using ifdef, ifndef, etc. */
char if_defined[128]; /* #ifdef xyzzy */
char not_defined[128]; /* #ifndef xyzzy */
char else_defined[] = "#else\n"; /* #else */
char end_defined[128]; /* #endif xyzzy */
char *revision = Nullch; /* prerequisite revision, if any */
/* procedures */
LINENUM locate_hunk();
bool patch_match();
bool similar();
char *malloc();
char *savestr();
char *strcpy();
char *strcat();
char *sprintf(); /* usually */
int my_exit();
bool rev_in_string();
char *fetchname();
long atol();
long lseek();
char *mktemp();
/* patch type */
bool there_is_another_patch();
bool another_hunk();
char *pfetch();
int pch_line_len();
LINENUM pch_first();
LINENUM pch_ptrn_lines();
LINENUM pch_newfirst();
LINENUM pch_repl_lines();
LINENUM pch_end();
LINENUM pch_context();
LINENUM pch_hunk_beg();
char pch_char();
char *pfetch();
char *pgets();
/* input file type */
char *ifetch();
/* apply a context patch to a named file */
main(argc,argv)
int argc;
char **argv;
{
LINENUM where;
int hunk = 0;
int failed = 0;
int i;
setbuf(stderr,serrbuf);
for (i = 0; i<MAXFILEC; i++)
filearg[i] = Nullch;
Mktemp(TMPOUTNAME);
Mktemp(TMPINNAME);
Mktemp(TMPREJNAME);
Mktemp(TMPPATNAME);
/* parse switches */
Argc = argc;
Argv = argv;
get_some_switches();
/* make sure we clean up /tmp in case of disaster */
set_signals();
for (
open_patch_file(filearg[1]);
there_is_another_patch();
reinitialize_almost_everything()
) { /* for each patch in patch file */
if (outname == Nullch)
outname = savestr(filearg[0]);
/* initialize the patched file */
init_output(TMPOUTNAME);
/* for ed script just up and do it and exit */
if (diff_type == ED_DIFF) {
do_ed_script();
continue;
}
/* initialize reject file */
init_reject(TMPREJNAME);
/* find out where all the lines are */
scan_input(filearg[0]);
/* from here on, open no standard i/o files, because malloc */
/* might misfire */
/* apply each hunk of patch */
hunk = 0;
failed = 0;
while (another_hunk()) {
hunk++;
where = locate_hunk();
if (hunk == 1 && where == Null(LINENUM)) {
/* dwim for reversed patch? */
pch_swap();
reverse = !reverse;
where = locate_hunk(); /* try again */
if (where == Null(LINENUM)) {
pch_swap(); /* no, put it back to normal */
reverse = !reverse;
}
else {
say("%seversed (or previously applied) patch detected! %s -R.\n",
reverse ? "R" : "Unr",
reverse ? "Assuming" : "Ignoring");
}
}
if (where == Null(LINENUM)) {
abort_hunk();
failed++;
if (verbose)
say("Hunk #%d failed.\n",hunk);
}
else {
apply_hunk(where);
if (verbose)
if (last_offset)
say("Hunk #%d succeeded (offset %d line%s).\n",
hunk,last_offset,last_offset==1?"":"s");
else
say("Hunk #%d succeeded.\n", hunk);
}
}
assert(hunk);
/* finish spewing out the new file */
spew_output();
/* and put the output where desired */
ignore_signals();
move_file(TMPOUTNAME,outname);
Fclose(rejfp);
rejfp = Nullfp;
if (failed) {
if (!*rejname) {
Strcpy(rejname, outname);
Strcat(rejname, ".rej");
}
say("%d out of %d hunks failed--saving rejects to %s\n",
failed, hunk, rejname);
move_file(TMPREJNAME,rejname);
}
set_signals();
}
my_exit(0);
}
reinitialize_almost_everything()
{
re_patch();
re_input();
input_lines = 0;
last_frozen_line = 0;
filec = 0;
if (filearg[0] != Nullch) {
free(filearg[0]);
filearg[0] = Nullch;
}
if (outname != Nullch) {
free(outname);
outname = Nullch;
}
last_offset = 0;
diff_type = 0;
if (revision != Nullch) {
free(revision);
revision = Nullch;
}
reverse = FALSE;
get_some_switches();
if (filec >= 2)
fatal("You may not change to a different patch file.\n");
}
get_some_switches()
{
register 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");
filearg[filec++] = savestr(s);
}
else {
switch (*++s) {
case 'b':
origext = savestr(Argv[1]);
Argc--,Argv++;
break;
case 'c':
diff_type = CONTEXT_DIFF;
break;
case 'd':
if (chdir(Argv[1]) < 0)
fatal("Can't cd to %s.\n",Argv[1]);
Argc--,Argv++;
break;
case 'D':
do_defines++;
Sprintf(if_defined, "#ifdef %s\n", Argv[1]);
Sprintf(not_defined, "#ifndef %s\n", Argv[1]);
Sprintf(end_defined, "#endif %s\n", Argv[1]);
Argc--,Argv++;
break;
case 'e':
diff_type = ED_DIFF;
break;
case 'l':
canonicalize = TRUE;
break;
case 'n':
diff_type = NORMAL_DIFF;
break;
case 'o':
outname = savestr(Argv[1]);
Argc--,Argv++;
break;
case 'p':
usepath = TRUE; /* do not strip path names */
break;
case 'r':
Strcpy(rejname,Argv[1]);
Argc--,Argv++;
break;
case 'R':
reverse = TRUE;
break;
case 's':
verbose = FALSE;
break;
#ifdef DEBUGGING
case 'x':
debug = atoi(s+1);
break;
#endif
default:
fatal("Unrecognized switch: %s\n",Argv[0]);
}
}
}
}
LINENUM
locate_hunk()
{
register LINENUM first_guess = pch_first() + last_offset;
register LINENUM offset;
LINENUM pat_lines = pch_ptrn_lines();
register LINENUM max_pos_offset = input_lines - first_guess
- pat_lines + 1;
register 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,(LINENUM)0))
return first_guess;
for (offset = 1; ; offset++) {
bool check_after = (offset <= max_pos_offset);
bool check_before = (offset <= max_pos_offset);
if (check_after && patch_match(first_guess,offset)) {
#ifdef DEBUGGING
if (debug & 1)
printf("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)) {
#ifdef DEBUGGING
if (debug & 1)
printf("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 Null(LINENUM);
}
}
/* we did not find the pattern, dump out the hunk so they can handle it */
abort_hunk()
{
register LINENUM i;
register LINENUM pat_end = pch_end();
/* add in last_offset to guess the same as the previous successful hunk */
int oldfirst = pch_first() + last_offset;
int newfirst = pch_newfirst() + last_offset;
int oldlast = oldfirst + pch_ptrn_lines() - 1;
int newlast = newfirst + pch_repl_lines() - 1;
fprintf(rejfp,"***************\n");
for (i=0; i<=pat_end; i++) {
switch (pch_char(i)) {
case '*':
fprintf(rejfp,"*** %d,%d\n", oldfirst, oldlast);
break;
case '=':
fprintf(rejfp,"--- %d,%d -----\n", newfirst, newlast);
break;
case '\n':
fprintf(rejfp,"%s", pfetch(i));
break;
case ' ': case '-': case '+': case '!':
fprintf(rejfp,"%c %s", pch_char(i), pfetch(i));
break;
default:
say("Fatal internal error in abort_hunk().\n");
abort();
}
}
}
/* we found where to apply it (we hope), so do it */
apply_hunk(where)
LINENUM where;
{
register LINENUM old = 1;
register LINENUM lastline = pch_ptrn_lines();
register LINENUM new = lastline+1;
register int def_state = 0; /* -1 = ifndef, 1 = ifdef */
where--;
while (pch_char(new) == '=' || pch_char(new) == '\n')
new++;
while (old <= lastline) {
if (pch_char(old) == '-') {
copy_till(where + old - 1);
if (do_defines) {
if (def_state == 0) {
fputs(not_defined, ofp);
def_state = -1;
} else
if (def_state == 1) {
fputs(else_defined, ofp);
def_state = 2;
}
fputs(pfetch(old), ofp);
}
last_frozen_line++;
old++;
}
else if (pch_char(new) == '+') {
copy_till(where + old - 1);
if (do_defines) {
if (def_state == -1) {
fputs(else_defined, ofp);
def_state = 2;
} else
if (def_state == 0) {
fputs(if_defined, ofp);
def_state = 1;
}
}
fputs(pfetch(new),ofp);
new++;
}
else {
if (pch_char(new) != pch_char(old)) {
say("Out-of-sync patch, lines %d,%d\n",
pch_hunk_beg() + old - 1,
pch_hunk_beg() + new - 1);
#ifdef DEBUGGING
printf("oldchar = '%c', newchar = '%c'\n",
pch_char(old), pch_char(new));
#endif
my_exit(1);
}
if (pch_char(new) == '!') {
copy_till(where + old - 1);
if (do_defines) {
fputs(not_defined,ofp);
def_state = -1;
}
while (pch_char(old) == '!') {
if (do_defines) {
fputs(pfetch(old),ofp);
}
last_frozen_line++;
old++;
}
if (do_defines) {
fputs(else_defined, ofp);
def_state = 2;
}
while (pch_char(new) == '!') {
fputs(pfetch(new),ofp);
new++;
}
if (do_defines) {
fputs(end_defined, ofp);
def_state = 0;
}
}
else {
assert(pch_char(new) == ' ');
old++;
new++;
}
}
}
if (new <= pch_end() && pch_char(new) == '+') {
copy_till(where + old - 1);
if (do_defines) {
if (def_state == 0) {
fputs(if_defined, ofp);
def_state = 1;
} else
if (def_state == -1) {
fputs(else_defined, ofp);
def_state = 2;
}
}
while (new <= pch_end() && pch_char(new) == '+') {
fputs(pfetch(new),ofp);
new++;
}
}
if (do_defines && def_state) {
fputs(end_defined, ofp);
}
}
do_ed_script()
{
FILE *pipefp, *popen();
bool this_line_is_command = FALSE;
register char *t;
long beginning_of_this_line;
Unlink(TMPOUTNAME);
copy_file(filearg[0],TMPOUTNAME);
if (verbose)
Sprintf(buf,"/bin/ed %s",TMPOUTNAME);
else
Sprintf(buf,"/bin/ed - %s",TMPOUTNAME);
pipefp = popen(buf,"w");
for (;;) {
beginning_of_this_line = ftell(pfp);
if (pgets(buf,sizeof buf,pfp) == Nullch) {
next_intuit_at(beginning_of_this_line);
break;
}
for (t=buf; isdigit(*t) || *t == ','; t++) ;
this_line_is_command = (isdigit(*buf) &&
(*t == 'd' || *t == 'c' || *t == 'a') );
if (this_line_is_command) {
fputs(buf,pipefp);
if (*t != 'd') {
while (pgets(buf,sizeof buf,pfp) != Nullch) {
fputs(buf,pipefp);
if (strEQ(buf,".\n"))
break;
}
}
}
else {
next_intuit_at(beginning_of_this_line);
break;
}
}
fprintf(pipefp,"w\n");
fprintf(pipefp,"q\n");
Fflush(pipefp);
Pclose(pipefp);
ignore_signals();
move_file(TMPOUTNAME,outname);
set_signals();
}
init_output(name)
char *name;
{
ofp = fopen(name,"w");
if (ofp == Nullfp)
fatal("patch: can't create %s.\n",name);
}
init_reject(name)
char *name;
{
rejfp = fopen(name,"w");
if (rejfp == Nullfp)
fatal("patch: can't create %s.\n",name);
}
move_file(from,to)
char *from, *to;
{
char bakname[512];
register char *s;
int fromfd;
register int i;
/* to stdout? */
if (strEQ(to,"-")) {
#ifdef DEBUGGING
if (debug & 4)
say("Moving %s to stdout.\n",from);
#endif
fromfd = open(from,0);
if (fromfd < 0)
fatal("patch: internal error, can't reopen %s\n",from);
while ((i=read(fromfd,buf,sizeof buf)) > 0)
if (write(1,buf,i) != 1)
fatal("patch: write failed\n");
Close(fromfd);
return;
}
Strcpy(bakname,to);
Strcat(bakname,origext?origext:ORIGEXT);
if (stat(to,&filestat) >= 0) { /* output file exists */
dev_t to_device = filestat.st_dev;
ino_t to_inode = filestat.st_ino;
char *simplename = bakname;
for (s=bakname; *s; s++) {
if (*s == '/')
simplename = s+1;
}
/* find a backup name that is not the same file */
while (stat(bakname,&filestat) >= 0 &&
to_device == filestat.st_dev && to_inode == filestat.st_ino) {
for (s=simplename; *s && !islower(*s); s++) ;
if (*s)
*s = toupper(*s);
else
Strcpy(simplename, simplename+1);
}
while (unlink(bakname) >= 0) ; /* while() is for benefit of Eunice */
#ifdef DEBUGGING
if (debug & 4)
say("Moving %s to %s.\n",to,bakname);
#endif
if (link(to,bakname) < 0) {
say("patch: can't backup %s, output is in %s\n",
to,from);
return;
}
while (unlink(to) >= 0) ;
}
#ifdef DEBUGGING
if (debug & 4)
say("Moving %s to %s.\n",from,to);
#endif
if (link(from,to) < 0) { /* different file system? */
int tofd;
tofd = creat(to,0666);
if (tofd < 0) {
say("patch: can't create %s, output is in %s.\n",
to, from);
return;
}
fromfd = open(from,0);
if (fromfd < 0)
fatal("patch: internal error, can't reopen %s\n",from);
while ((i=read(fromfd,buf,sizeof buf)) > 0)
if (write(tofd,buf,i) != i)
fatal("patch: write failed\n");
Close(fromfd);
Close(tofd);
}
Unlink(from);
}
copy_file(from,to)
char *from, *to;
{
int tofd;
int fromfd;
register int i;
tofd = creat(to,0666);
if (tofd < 0)
fatal("patch: can't create %s.\n", to);
fromfd = open(from,0);
if (fromfd < 0)
fatal("patch: internal error, can't reopen %s\n",from);
while ((i=read(fromfd,buf,sizeof buf)) > 0)
if (write(tofd,buf,i) != i)
fatal("patch: write (%s) failed\n", to);
Close(fromfd);
Close(tofd);
}
copy_till(lastline)
register LINENUM lastline;
{
if (last_frozen_line > lastline)
say("patch: misordered hunks! output will be garbled.\n");
while (last_frozen_line < lastline) {
dump_line(++last_frozen_line);
}
}
spew_output()
{
copy_till(input_lines); /* dump remainder of file */
Fclose(ofp);
ofp = Nullfp;
}
dump_line(line)
LINENUM line;
{
register char *s;
for (s=ifetch(line,0); putc(*s,ofp) != '\n'; s++) ;
}
/* does the patch pattern match at line base+offset? */
bool
patch_match(base,offset)
LINENUM base;
LINENUM offset;
{
register LINENUM pline;
register LINENUM iline;
register LINENUM pat_lines = pch_ptrn_lines();
for (pline = 1, iline=base+offset; pline <= pat_lines; pline++,iline++) {
if (canonicalize) {
if (!similar(ifetch(iline,(offset >= 0)),
pfetch(pline),
pch_line_len(pline) ))
return FALSE;
}
else if (strnNE(ifetch(iline,(offset >= 0)),
pfetch(pline),
pch_line_len(pline) ))
return FALSE;
}
return TRUE;
}
/* match two lines with canonicalized white space */
bool
similar(a,b,len)
register char *a, *b;
register int len;
{
while (len) {
if (isspace(*b)) { /* whitespace (or \n) to match? */
if (!isspace(*a)) /* no corresponding whitespace? */
return FALSE;
while (len && isspace(*b) && *b != '\n')
b++,len--; /* skip pattern whitespace */
while (isspace(*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 */
}
/* input file with indexable lines abstract type */
bool using_plan_a = TRUE;
static long i_size; /* size of the input file */
static char *i_womp; /* plan a buffer for entire file */
static char **i_ptr; /* pointers to lines in i_womp */
static int tifd = -1; /* plan b virtual string array */
static char *tibuf[2]; /* plan b buffers */
static LINENUM tiline[2] = {-1,-1}; /* 1st line in each buffer */
static LINENUM lines_per_buf; /* how many lines per buffer */
static int tireclen; /* length of records in tmp file */
re_input()
{
if (using_plan_a) {
i_size = 0;
/*NOSTRICT*/
if (i_ptr != Null(char**))
free((char *)i_ptr);
if (i_womp != Nullch)
free(i_womp);
i_womp = Nullch;
i_ptr = Null(char **);
}
else {
using_plan_a = TRUE; /* maybe the next one is smaller */
Close(tifd);
tifd = -1;
free(tibuf[0]);
free(tibuf[1]);
tibuf[0] = tibuf[1] = Nullch;
tiline[0] = tiline[1] = -1;
tireclen = 0;
}
}
scan_input(filename)
char *filename;
{
bool plan_a();
if (!plan_a(filename))
plan_b(filename);
}
/* try keeping everything in memory */
bool
plan_a(filename)
char *filename;
{
int ifd;
register char *s;
register LINENUM iline;
if (stat(filename,&filestat) < 0) {
Sprintf(buf,"RCS/%s%s",filename,RCSSUFFIX);
if (stat(buf,&filestat) >= 0 || stat(buf+4,&filestat) >= 0) {
Sprintf(buf,CHECKOUT,filename);
if (verbose)
say("Can't find %s--attempting to check it out from RCS.\n",
filename);
if (system(buf) || stat(filename,&filestat))
fatal("Can't check out %s.\n",filename);
}
else {
Sprintf(buf,"SCCS/%s%s",SCCSPREFIX,filename);
if (stat(buf,&filestat) >= 0 || stat(buf+5,&filestat) >= 0) {
Sprintf(buf,GET,filename);
if (verbose)
say("Can't find %s--attempting to get it from SCCS.\n",
filename);
if (system(buf) || stat(filename,&filestat))
fatal("Can't get %s.\n",filename);
}
else
fatal("Can't find %s.\n",filename);
}
}
if ((filestat.st_mode & S_IFMT) & ~S_IFREG)
fatal("%s is not a normal file--can't patch.\n",filename);
i_size = filestat.st_size;
/*NOSTRICT*/
i_womp = malloc((MEM)(i_size+2));
if (i_womp == Nullch)
return FALSE;
if ((ifd = open(filename,0)) < 0)
fatal("Can't open file %s\n",filename);
/*NOSTRICT*/
if (read(ifd,i_womp,(int)i_size) != i_size) {
Close(ifd);
free(i_womp);
return FALSE;
}
Close(ifd);
if (i_womp[i_size-1] != '\n')
i_womp[i_size++] = '\n';
i_womp[i_size] = '\0';
/* count the lines in the buffer so we know how many pointers we need */
iline = 0;
for (s=i_womp; *s; s++) {
if (*s == '\n')
iline++;
}
/*NOSTRICT*/
i_ptr = (char **)malloc((MEM)((iline + 2) * sizeof(char *)));
if (i_ptr == Null(char **)) { /* shucks, it was a near thing */
free((char *)i_womp);
return FALSE;
}
/* now scan the buffer and build pointer array */
iline = 1;
i_ptr[iline] = i_womp;
for (s=i_womp; *s; s++) {
if (*s == '\n')
i_ptr[++iline] = s+1; /* these are NOT null terminated */
}
input_lines = iline - 1;
/* now check for revision, if any */
if (revision != Nullch) {
if (!rev_in_string(i_womp)) {
ask("This file doesn't appear to be the %s version--patch anyway? [n] ",
revision);
if (*buf != 'y')
fatal("Aborted.\n");
}
else if (verbose)
say("Good. This file appears to be the %s version.\n",
revision);
}
return TRUE; /* plan a will work */
}
/* keep (virtually) nothing in memory */
plan_b(filename)
char *filename;
{
FILE *ifp;
register int i = 0;
register int maxlen = 1;
bool found_revision = (revision == Nullch);
using_plan_a = FALSE;
if ((ifp = fopen(filename,"r")) == Nullfp)
fatal("Can't open file %s\n",filename);
if ((tifd = creat(TMPINNAME,0666)) < 0)
fatal("Can't open file %s\n",TMPINNAME);
while (fgets(buf,sizeof buf, ifp) != Nullch) {
if (revision != Nullch && !found_revision && rev_in_string(buf))
found_revision = TRUE;
if ((i = strlen(buf)) > maxlen)
maxlen = i; /* find longest line */
}
if (revision != Nullch) {
if (!found_revision) {
ask("This file doesn't appear to be the %s version--patch anyway? [n] ",
revision);
if (*buf != 'y')
fatal("Aborted.\n");
}
else if (verbose)
say("Good. This file appears to be the %s version.\n",
revision);
}
Fseek(ifp,0L,0); /* rewind file */
lines_per_buf = BUFFERSIZE / maxlen;
tireclen = maxlen;
tibuf[0] = malloc((MEM)(BUFFERSIZE + 1));
tibuf[1] = malloc((MEM)(BUFFERSIZE + 1));
if (tibuf[1] == Nullch)
fatal("Can't seem to get enough memory.\n");
for (i=1; ; i++) {
if (! (i % lines_per_buf)) /* new block */
if (write(tifd,tibuf[0],BUFFERSIZE) < BUFFERSIZE)
fatal("patch: can't write temp file.\n");
if (fgets(tibuf[0] + maxlen * (i%lines_per_buf), maxlen + 1, ifp)
== Nullch) {
input_lines = i - 1;
if (i % lines_per_buf)
if (write(tifd,tibuf[0],BUFFERSIZE) < BUFFERSIZE)
fatal("patch: can't write temp file.\n");
break;
}
}
Fclose(ifp);
Close(tifd);
if ((tifd = open(TMPINNAME,0)) < 0) {
fatal("Can't reopen file %s\n",TMPINNAME);
}
}
/* fetch a line from the input file, \n terminated, not necessarily \0 */
char *
ifetch(line,whichbuf)
register LINENUM line;
int whichbuf; /* ignored when file in memory */
{
if (line < 1 || line > input_lines)
return "";
if (using_plan_a)
return i_ptr[line];
else {
LINENUM offline = line % lines_per_buf;
LINENUM baseline = line - offline;
if (tiline[0] == baseline)
whichbuf = 0;
else if (tiline[1] == baseline)
whichbuf = 1;
else {
tiline[whichbuf] = baseline;
Lseek(tifd,(long)baseline / lines_per_buf * BUFFERSIZE,0);
if (read(tifd,tibuf[whichbuf],BUFFERSIZE) < 0)
fatal("Error reading tmp file %s.\n",TMPINNAME);
}
return tibuf[whichbuf] + (tireclen*offline);
}
}
/* patch abstract type */
static long p_filesize; /* size of the patch file */
static LINENUM p_first; /* 1st line number */
static LINENUM p_newfirst; /* 1st line number of replacement */
static LINENUM p_ptrn_lines; /* # lines in pattern */
static LINENUM p_repl_lines; /* # lines in replacement text */
static LINENUM p_end = -1; /* last line in hunk */
static LINENUM p_max; /* max allowed value of p_end */
static LINENUM p_context = 3; /* # of context lines */
static LINENUM p_input_line = 0; /* current line # from patch file */
static char *p_line[MAXHUNKSIZE]; /* the text of the hunk */
static char p_char[MAXHUNKSIZE]; /* +, -, and ! */
static int p_len[MAXHUNKSIZE]; /* length of each line */
static int p_indent; /* indent to patch */
static long p_base; /* where to intuit this time */
static long p_start; /* where intuit found a patch */
re_patch()
{
p_first = (LINENUM)0;
p_newfirst = (LINENUM)0;
p_ptrn_lines = (LINENUM)0;
p_repl_lines = (LINENUM)0;
p_end = (LINENUM)-1;
p_max = (LINENUM)0;
p_indent = 0;
}
open_patch_file(filename)
char *filename;
{
if (filename == Nullch || !*filename || strEQ(filename,"-")) {
pfp = fopen(TMPPATNAME,"w");
if (pfp == Nullfp)
fatal("patch: can't create %s.\n",TMPPATNAME);
while (fgets(buf,sizeof buf,stdin) != NULL)
fputs(buf,pfp);
Fclose(pfp);
filename = TMPPATNAME;
}
pfp = fopen(filename,"r");
if (pfp == Nullfp)
fatal("patch file %s not found\n",filename);
Fstat(fileno(pfp), &filestat);
p_filesize = filestat.st_size;
next_intuit_at(0L); /* start at the beginning */
}
bool
there_is_another_patch()
{
bool no_input_file = (filearg[0] == Nullch);
if (p_base != 0L && p_base >= p_filesize) {
if (verbose)
say("done\n");
return FALSE;
}
if (verbose)
say("Hmm...");
diff_type = intuit_diff_type();
if (!diff_type) {
if (p_base != 0L) {
if (verbose)
say(" Ignoring the trailing garbage.\ndone\n");
}
else
say(" I can't seem to find a patch in there anywhere.\n");
return FALSE;
}
if (verbose)
say(" %sooks like %s to me...\n",
(p_base == 0L ? "L" : "The next patch l"),
diff_type == CONTEXT_DIFF ? "a context diff" :
diff_type == NEW_CONTEXT_DIFF ? "a new-style context diff" :
diff_type == NORMAL_DIFF ? "a normal diff" :
"an ed script" );
if (p_indent && verbose)
say("(Patch is indented %d space%s.)\n",p_indent,p_indent==1?"":"s");
skip_to(p_start);
if (no_input_file) {
if (filearg[0] == Nullch) {
ask("File to patch: ");
filearg[0] = fetchname(buf);
}
else if (verbose) {
say("Patching file %s...\n",filearg[0]);
}
}
return TRUE;
}
intuit_diff_type()
{
long this_line = 0;
long previous_line;
long first_command_line = -1;
bool last_line_was_command = FALSE;
bool this_line_is_command = FALSE;
bool last_line_was_stars = FALSE;
bool this_line_is_stars = FALSE;
register int indent;
register char *s, *t;
char *oldname = Nullch;
char *newname = Nullch;
bool no_filearg = (filearg[0] == Nullch);
Fseek(pfp,p_base,0);
for (;;) {
previous_line = this_line;
last_line_was_command = this_line_is_command;
last_line_was_stars = this_line_is_stars;
this_line = ftell(pfp);
indent = 0;
if (fgets(buf,sizeof buf,pfp) == Nullch) {
if (first_command_line >= 0L) {
/* nothing but deletes!? */
p_start = first_command_line;
return ED_DIFF;
}
else {
p_start = this_line;
return 0;
}
}
for (s = buf; *s == ' ' || *s == '\t'; s++) {
if (*s == '\t')
indent += 8 - (indent % 8);
else
indent++;
}
for (t=s; isdigit(*t) || *t == ','; t++) ;
this_line_is_command = (isdigit(*s) &&
(*t == 'd' || *t == 'c' || *t == 'a') );
if (first_command_line < 0L && this_line_is_command) {
first_command_line = this_line;
p_indent = indent; /* assume this for now */
}
if (strnEQ(s,"*** ",4))
oldname = fetchname(s+4);
else if (strnEQ(s,"--- ",4)) {
newname = fetchname(s+4);
if (no_filearg) {
if (oldname && newname) {
if (strlen(oldname) < strlen(newname))
filearg[0] = oldname;
else
filearg[0] = newname;
}
else if (oldname)
filearg[0] = oldname;
else if (newname)
filearg[0] = newname;
}
}
else if (strnEQ(s,"Index:",6)) {
if (no_filearg)
filearg[0] = fetchname(s+6);
/* this filearg might get limboed */
}
else if (strnEQ(s,"Prereq:",7)) {
for (t=s+7; isspace(*t); t++) ;
revision = savestr(t);
for (t=revision; *t && !isspace(*t); t++) ;
*t = '\0';
if (!*revision) {
free(revision);
revision = Nullch;
}
}
if ((!diff_type || diff_type == ED_DIFF) &&
first_command_line >= 0L &&
strEQ(s,".\n") ) {
p_indent = indent;
p_start = first_command_line;
return ED_DIFF;
}
this_line_is_stars = strnEQ(s,"********",8);
if ((!diff_type || diff_type == CONTEXT_DIFF) && last_line_was_stars &&
strnEQ(s,"*** ",4)) {
/* if this is a new context diff the character just before */
/* the newline is a '*'. */
while (*s != '\n')
s++;
p_indent = indent;
p_start = previous_line;
return (*(s-1) == '*' ? NEW_CONTEXT_DIFF : CONTEXT_DIFF);
}
if ((!diff_type || diff_type == NORMAL_DIFF) &&
last_line_was_command &&
(strnEQ(s,"< ",2) || strnEQ(s,"> ",2)) ) {
p_start = previous_line;
p_indent = indent;
return NORMAL_DIFF;
}
}
}
char *
fetchname(at)
char *at;
{
char *s = savestr(at);
char *name;
register char *t;
char tmpbuf[200];
for (t=s; isspace(*t); t++) ;
name = t;
for (; *t && !isspace(*t); t++)
if (!usepath)
if (*t == '/')
name = t+1;
*t = '\0';
name = savestr(name);
Sprintf(tmpbuf,"RCS/%s",name);
free(s);
if (stat(name,&filestat) < 0) {
Strcat(tmpbuf,RCSSUFFIX);
if (stat(tmpbuf,&filestat) < 0 && stat(tmpbuf+4,&filestat) < 0) {
Sprintf(tmpbuf,"SCCS/%s%s",SCCSPREFIX,name);
if (stat(tmpbuf,&filestat) < 0 && stat(tmpbuf+5,&filestat) < 0) {
free(name);
name = Nullch;
}
}
}
return name;
}
next_intuit_at(file_pos)
long file_pos;
{
p_base = file_pos;
}
skip_to(file_pos)
long file_pos;
{
char *ret;
assert(p_base <= file_pos);
if (verbose && p_base < file_pos) {
Fseek(pfp,p_base,0);
say("The text leading up to this was:\n--------------------------\n");
while (ftell(pfp) < file_pos) {
ret = fgets(buf,sizeof buf,pfp);
assert(ret != Nullch);
say("|%s",buf);
}
say("--------------------------\n");
}
else
Fseek(pfp,file_pos,0);
}
bool
another_hunk()
{
register char *s;
char *ret;
register int context = 0;
while (p_end >= 0) {
free(p_line[p_end--]);
}
assert(p_end == -1);
p_max = MAXHUNKSIZE; /* gets reduced when --- found */
if (diff_type == CONTEXT_DIFF) {
long line_beginning = ftell(pfp);
LINENUM repl_beginning = 0;
ret = pgets(buf,sizeof buf, pfp);
if (ret == Nullch || strnNE(buf,"********",8)) {
next_intuit_at(line_beginning);
return FALSE;
}
p_context = 100;
while (p_end < p_max) {
ret = pgets(buf,sizeof buf, pfp);
if (ret == Nullch) {
if (p_max - p_end < 4)
Strcpy(buf," \n"); /* assume blank lines got chopped */
else
fatal("Unexpected end of file in patch.\n");
}
p_input_line++;
if (strnEQ(buf,"********",8))
fatal("Unexpected end of hunk at line %d.\n",
p_input_line);
p_char[++p_end] = *buf;
switch (*buf) {
case '*':
if (p_end != 0)
fatal("Unexpected *** at line %d: %s", p_input_line, buf);
context = 0;
p_line[p_end] = savestr(buf);
for (s=buf; *s && !isdigit(*s); s++) ;
p_first = (LINENUM) atol(s);
while (isdigit(*s)) s++;
for (; *s && !isdigit(*s); s++) ;
p_ptrn_lines = ((LINENUM)atol(s)) - p_first + 1;
break;
case '-':
if (buf[1] == '-') {
if (p_end != p_ptrn_lines + 1 &&
p_end != p_ptrn_lines + 2)
fatal("Unexpected --- at line %d: %s",
p_input_line,buf);
repl_beginning = p_end;
context = 0;
p_line[p_end] = savestr(buf);
p_char[p_end] = '=';
for (s=buf; *s && !isdigit(*s); s++) ;
p_newfirst = (LINENUM) atol(s);
while (isdigit(*s)) s++;
for (; *s && !isdigit(*s); s++) ;
p_max = ((LINENUM)atol(s)) - p_newfirst + 1 + p_end;
break;
}
/* FALL THROUGH */
case '+': case '!':
if (context > 0) {
if (context < p_context)
p_context = context;
context = -100;
}
p_line[p_end] = savestr(buf+2);
break;
case '\t': case '\n': /* assume the 2 spaces got eaten */
p_line[p_end] = savestr(buf);
if (p_end != p_ptrn_lines + 1) {
context++;
p_char[p_end] = ' ';
}
break;
case ' ':
context++;
p_line[p_end] = savestr(buf+2);
break;
default:
fatal("Malformed patch at line %d: %s",p_input_line,buf);
}
p_len[p_end] = 0;
if (p_line[p_end] != 0)
p_len[p_end] = strlen(p_line[p_end]);
/* for strncmp() so we do not have */
/* to assume null termination */
}
if (p_end >=0 && !p_ptrn_lines)
fatal("No --- found in patch at line %d\n", pch_hunk_beg());
p_repl_lines = p_end - repl_beginning;
}
else if (diff_type == NEW_CONTEXT_DIFF) {
long line_beginning = ftell(pfp);
LINENUM repl_beginning = 0;
LINENUM fillcnt = 0;
LINENUM fillsrc;
LINENUM filldst;
ret = pgets(buf,sizeof buf, pfp);
if (ret == Nullch || strnNE(buf,"********",8)) {
next_intuit_at(line_beginning);
return FALSE;
}
p_context = 0;
while (p_end < p_max) {
line_beginning = ftell(pfp);
ret = pgets(buf,sizeof buf, pfp);
if (ret == Nullch) {
if (p_max - p_end < 4)
Strcpy(buf," \n"); /* assume blank lines got chopped */
else
fatal("Unexpected end of file in patch.\n");
}
p_input_line++;
p_char[++p_end] = *buf;
switch (*buf) {
case '*':
if (strnEQ(buf,"********",8)) {
if (p_end != repl_beginning + 1)
fatal("Unexpected end of hunk at line %d.\n",
p_input_line);
/* redundant 'new' context lines were omitted - set up */
/* to fill them in from the the old file's context */
fillsrc = 1;
filldst = p_end;
fillcnt = p_max - repl_beginning;
p_end = p_max;
Fseek(pfp, line_beginning, 0); /* backup the diff input */
break;
}
if (p_end != 0)
fatal("Unexpected *** at line %d: %s", p_input_line, buf);
context = 0;
p_line[p_end] = savestr(buf);
for (s=buf; *s && !isdigit(*s); s++) ;
p_first = (LINENUM) atol(s);
while (isdigit(*s)) s++;
for (; *s && !isdigit(*s); s++) ;
p_ptrn_lines = ((LINENUM)atol(s)) - p_first + 1;
break;
case '-':
if (buf[1] == '-') {
if (p_end != p_ptrn_lines + 1) {
if (p_end == 1) {
/* `old' lines were omitted - set up to fill them */
/* in from 'new' context lines. */
p_end = p_ptrn_lines + 1;
fillsrc = p_end + 1;
filldst = 1;
fillcnt = p_ptrn_lines;
} else
fatal("Unexpected --- at line %d: %s",
p_input_line,buf);
}
repl_beginning = p_end;
p_line[p_end] = savestr(buf);
p_char[p_end] = '=';
for (s=buf; *s && !isdigit(*s); s++) ;
p_newfirst = (LINENUM) atol(s);
while (isdigit(*s)) s++;
for (; *s && !isdigit(*s); s++) ;
p_max = ((LINENUM)atol(s)) - p_newfirst + 1 + p_end;
break;
}
/* FALL THROUGH */
case '+': case '!':
if (context > 0 && p_context == 0) {
p_context = context;
}
p_line[p_end] = savestr(buf+2);
break;
case '\t': case '\n': /* assume the 2 spaces got eaten */
p_line[p_end] = savestr(buf);
if (p_end != p_ptrn_lines + 1) {
context++;
p_char[p_end] = ' ';
}
break;
case ' ':
context++;
p_line[p_end] = savestr(buf+2);
break;
default:
fatal("Malformed patch at line %d: %s",p_input_line,buf);
}
p_len[p_end] = 0;
if (p_line[p_end] != 0)
p_len[p_end] = strlen(p_line[p_end]);
/* for strncmp() so we do not have */
/* to assume null termination */
}
if (p_end >=0 && !p_ptrn_lines)
fatal("No --- found in patch at line %d\n", pch_hunk_beg());
/* if there were omitted context lines, fill them in */
if (fillcnt) {
while (fillcnt-- > 0) {
while (p_char[fillsrc] != ' ')
fillsrc++;
p_line[filldst] = p_line[fillsrc];
p_char[filldst] = p_char[fillsrc];
p_len[filldst] = p_len[fillsrc];
fillsrc++; filldst++;
}
assert(fillsrc==p_end+1 || fillsrc==repl_beginning);
assert(filldst==p_end+1 || filldst==repl_beginning);
}
p_repl_lines = p_end - repl_beginning;
}
else { /* normal diff--fake it up */
char hunk_type;
register int i;
LINENUM min, max;
long line_beginning = ftell(pfp);
p_context = 0;
ret = pgets(buf,sizeof buf, pfp);
p_input_line++;
if (ret == Nullch || !isdigit(*buf)) {
next_intuit_at(line_beginning);
return FALSE;
}
p_first = (LINENUM)atol(buf);
for (s=buf; isdigit(*s); s++) ;
if (*s == ',') {
p_ptrn_lines = (LINENUM)atol(++s) - p_first + 1;
while (isdigit(*s)) s++;
}
else
p_ptrn_lines = (*s != 'a');
hunk_type = *s;
if (hunk_type == 'a')
p_first++; /* do append rather than insert */
min = (LINENUM)atol(++s);
for (; isdigit(*s); s++) ;
if (*s == ',')
max = (LINENUM)atol(++s);
else
max = min;
if (hunk_type == 'd')
min++;
p_end = p_ptrn_lines + 1 + max - min + 1;
p_newfirst = min;
p_repl_lines = max - min + 1;
Sprintf(buf,"*** %d,%d\n", p_first, p_first + p_ptrn_lines - 1);
p_line[0] = savestr(buf);
p_char[0] = '*';
for (i=1; i<=p_ptrn_lines; i++) {
ret = pgets(buf,sizeof buf, pfp);
p_input_line++;
if (ret == Nullch)
fatal("Unexpected end of file in patch at line %d.\n",
p_input_line);
if (*buf != '<')
fatal("< expected at line %d of patch.\n", p_input_line);
p_line[i] = savestr(buf+2);
p_len[i] = 0;
if (p_line[i] != 0)
p_len[i] = strlen(p_line[i]);
p_char[i] = '-';
}
if (hunk_type == 'c') {
ret = pgets(buf,sizeof buf, pfp);
p_input_line++;
if (ret == Nullch)
fatal("Unexpected end of file in patch at line %d.\n",
p_input_line);
if (*buf != '-')
fatal("--- expected at line %d of patch.\n", p_input_line);
}
Sprintf(buf,"--- %d,%d\n",min,max);
p_line[i] = savestr(buf);
p_char[i] = '=';
for (i++; i<=p_end; i++) {
ret = pgets(buf,sizeof buf, pfp);
p_input_line++;
if (ret == Nullch)
fatal("Unexpected end of file in patch at line %d.\n",
p_input_line);
if (*buf != '>')
fatal("> expected at line %d of patch.\n", p_input_line);
p_line[i] = savestr(buf+2);
p_len[i] = 0;
if (p_line[i] != 0)
p_len[i] = strlen(p_line[i]);
p_char[i] = '+';
}
}
if (reverse) /* backwards patch? */
pch_swap();
#ifdef DEBUGGING
if (debug & 2) {
int i;
char special;
for (i=0; i <= p_end; i++) {
if (i == p_ptrn_lines)
special = '^';
else
special = ' ';
printf("%3d %c %c %s",i,p_char[i],special,p_line[i]);
}
}
#endif
return TRUE;
}
char *
pgets(bf,sz,fp)
char *bf;
int sz;
FILE *fp;
{
char *ret = fgets(bf,sz,fp);
register char *s;
register int indent = 0;
if (p_indent && ret != Nullch) {
for (s=buf; indent < p_indent && (*s == ' ' || *s == '\t'); s++) {
if (*s == '\t')
indent += 8 - (indent % 7);
else
indent++;
}
if (buf != s)
Strcpy(buf,s);
}
return ret;
}
pch_swap()
{
char *tp_line[MAXHUNKSIZE]; /* the text of the hunk */
char tp_char[MAXHUNKSIZE]; /* +, -, and ! */
int tp_len[MAXHUNKSIZE]; /* length of each line */
register LINENUM i, n;
bool blankline = FALSE;
register char *s;
i = p_first;
p_first = p_newfirst;
p_newfirst = i;
/* make a scratch copy */
for (i=0; i<=p_end; i++) {
tp_line[i] = p_line[i];
tp_char[i] = p_char[i];
tp_len[i] = p_len[i];
}
/* now turn the new into the old */
i = p_ptrn_lines + 1;
if (tp_char[i] == '\n') { /* account for possible blank line */
blankline = TRUE;
i++;
}
for (n=0; i <= p_end; i++,n++) {
p_line[n] = tp_line[i];
p_char[n] = tp_char[i];
if (p_char[n] == '+')
p_char[n] = '-';
p_len[n] = tp_len[i];
}
if (blankline) {
i = p_ptrn_lines + 1;
p_line[n] = tp_line[i];
p_char[n] = tp_char[i];
p_len[n] = tp_len[i];
n++;
}
assert(p_char[0] == '=');
p_char[0] = '*';
for (s=p_line[0]; *s; s++)
if (*s == '-')
*s = '*';
/* now turn the old into the new */
assert(tp_char[0] == '*');
tp_char[0] = '=';
for (s=tp_line[0]; *s; s++)
if (*s == '*')
*s = '-';
for (i=0; n <= p_end; i++,n++) {
p_line[n] = tp_line[i];
p_char[n] = tp_char[i];
if (p_char[n] == '-')
p_char[n] = '+';
p_len[n] = tp_len[i];
}
assert(i == p_ptrn_lines + 1);
i = p_ptrn_lines;
p_ptrn_lines = p_repl_lines;
p_repl_lines = i;
}
LINENUM
pch_first()
{
return p_first;
}
LINENUM
pch_ptrn_lines()
{
return p_ptrn_lines;
}
LINENUM
pch_newfirst()
{
return p_newfirst;
}
LINENUM
pch_repl_lines()
{
return p_repl_lines;
}
LINENUM
pch_end()
{
return p_end;
}
LINENUM
pch_context()
{
return p_context;
}
pch_line_len(line)
LINENUM line;
{
return p_len[line];
}
char
pch_char(line)
LINENUM line;
{
return p_char[line];
}
char *
pfetch(line)
LINENUM line;
{
return p_line[line];
}
LINENUM
pch_hunk_beg()
{
return p_input_line - p_end - 1;
}
char *
savestr(s)
register char *s;
{
register char *rv,
*t;
t = s;
while (*t++);
rv = malloc((MEM) (t - s));
if (rv == NULL)
fatal ("patch: out of memory (savestr)\n");
t = rv;
while (*t++ = *s++);
return rv;
}
my_exit(status)
int status;
{
Unlink(TMPINNAME);
Unlink(TMPOUTNAME);
Unlink(TMPREJNAME);
Unlink(TMPPATNAME);
exit(status);
}
#ifdef lint
/*VARARGS ARGSUSED*/
say(pat) char *pat; { ; }
/*VARARGS ARGSUSED*/
fatal(pat) char *pat; { ; }
/*VARARGS ARGSUSED*/
ask(pat) char *pat; { ; }
#else lint
say(pat,arg1,arg2,arg3)
char *pat;
int arg1,arg2,arg3;
{
fprintf(stderr,pat,arg1,arg2,arg3);
Fflush(stderr);
}
fatal(pat,arg1,arg2,arg3)
char *pat;
int arg1,arg2,arg3;
{
say(pat,arg1,arg2,arg3);
my_exit(1);
}
ask(pat,arg1,arg2,arg3)
char *pat;
int arg1,arg2,arg3;
{
int ttyfd = open("/dev/tty",2);
int r;
say(pat,arg1,arg2,arg3);
if (ttyfd >= 0) {
r = read(ttyfd, buf, sizeof buf);
Close(ttyfd);
}
else
r = read(2, buf, sizeof buf);
if (r <= 0)
buf[0] = 0;
}
#endif lint
bool
rev_in_string(string)
char *string;
{
register char *s;
register int patlen;
if (revision == Nullch)
return TRUE;
patlen = strlen(revision);
for (s = string; *s; s++) {
if (isspace(*s) && strnEQ(s+1,revision,patlen) &&
isspace(s[patlen+1] )) {
return TRUE;
}
}
return FALSE;
}
set_signals()
{
/*NOSTRICT*/
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
Signal(SIGHUP, my_exit);
/*NOSTRICT*/
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
Signal(SIGINT, my_exit);
}
ignore_signals()
{
/*NOSTRICT*/
Signal(SIGHUP, SIG_IGN);
/*NOSTRICT*/
Signal(SIGINT, SIG_IGN);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.