383 lines
10 KiB
C
383 lines
10 KiB
C
/* $Header: /home/ncvs/src/gnu/usr.bin/patch/inp.c,v 1.2 1995/01/12 22:09:39 hsu Exp $
|
|
*
|
|
* $Log: inp.c,v $
|
|
* Revision 1.2 1995/01/12 22:09:39 hsu
|
|
* Fix bug that created new files even when running in -C check mode.
|
|
* Reviewed by: phk
|
|
*
|
|
* Revision 1.1.1.1 1993/06/19 14:21:52 paul
|
|
* b-maked patch-2.10
|
|
*
|
|
* Revision 2.0.1.1 88/06/03 15:06:13 lwall
|
|
* patch10: made a little smarter about sccs files
|
|
*
|
|
* Revision 2.0 86/09/17 15:37:02 lwall
|
|
* Baseline for netwide release.
|
|
*
|
|
*/
|
|
|
|
#include "EXTERN.h"
|
|
#include "common.h"
|
|
#include "util.h"
|
|
#include "pch.h"
|
|
#include "INTERN.h"
|
|
#include "inp.h"
|
|
|
|
/* Input-file-with-indexable-lines abstract type */
|
|
|
|
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 */
|
|
|
|
/* New patch--prepare to edit another file. */
|
|
|
|
void
|
|
re_input()
|
|
{
|
|
if (using_plan_a) {
|
|
i_size = 0;
|
|
#ifndef lint
|
|
if (i_ptr != Null(char**))
|
|
free((char *)i_ptr);
|
|
#endif
|
|
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;
|
|
}
|
|
}
|
|
|
|
/* Constuct the line index, somehow or other. */
|
|
|
|
void
|
|
scan_input(filename)
|
|
char *filename;
|
|
{
|
|
if (!plan_a(filename))
|
|
plan_b(filename);
|
|
if (verbose) {
|
|
say3("Patching file %s using Plan %s...\n", filename,
|
|
(using_plan_a ? "A" : "B") );
|
|
}
|
|
}
|
|
|
|
/* Try keeping everything in memory. */
|
|
|
|
bool
|
|
plan_a(filename)
|
|
char *filename;
|
|
{
|
|
int ifd, statfailed;
|
|
Reg1 char *s;
|
|
Reg2 LINENUM iline;
|
|
char lbuf[MAXLINELEN];
|
|
int output_elsewhere = strcmp(filename, outname);
|
|
extern int check_patch;
|
|
|
|
statfailed = stat(filename, &filestat);
|
|
if (statfailed && ok_to_create_file) {
|
|
if (verbose)
|
|
say2("(Creating file %s...)\n",filename);
|
|
if (check_patch)
|
|
return TRUE;
|
|
makedirs(filename, TRUE);
|
|
close(creat(filename, 0666));
|
|
statfailed = stat(filename, &filestat);
|
|
}
|
|
if (statfailed && check_patch) {
|
|
fatal2("%s not found and in check_patch mode.", filename);
|
|
}
|
|
/* For nonexistent or read-only files, look for RCS or SCCS versions. */
|
|
if (statfailed
|
|
|| (! output_elsewhere
|
|
&& (/* No one can write to it. */
|
|
(filestat.st_mode & 0222) == 0
|
|
/* I can't write to it. */
|
|
|| ((filestat.st_mode & 0022) == 0
|
|
&& filestat.st_uid != myuid)))) {
|
|
struct stat cstat;
|
|
char *cs = Nullch;
|
|
char *filebase;
|
|
int pathlen;
|
|
|
|
filebase = basename(filename);
|
|
pathlen = filebase - filename;
|
|
|
|
/* Put any leading path into `s'.
|
|
Leave room in lbuf for the diff command. */
|
|
s = lbuf + 20;
|
|
strncpy(s, filename, pathlen);
|
|
|
|
#define try(f,a1,a2) (Sprintf(s + pathlen, f, a1, a2), stat(s, &cstat) == 0)
|
|
if (( try("RCS/%s%s", filebase, RCSSUFFIX)
|
|
|| try("RCS/%s" , filebase, 0)
|
|
|| try( "%s%s", filebase, RCSSUFFIX))
|
|
&&
|
|
/* Check that RCS file is not working file.
|
|
Some hosts don't report file name length errors. */
|
|
(statfailed
|
|
|| ( (filestat.st_dev ^ cstat.st_dev)
|
|
| (filestat.st_ino ^ cstat.st_ino)))) {
|
|
Sprintf(buf, output_elsewhere?CHECKOUT:CHECKOUT_LOCKED, filename);
|
|
Sprintf(lbuf, RCSDIFF, filename);
|
|
cs = "RCS";
|
|
} else if ( try("SCCS/%s%s", SCCSPREFIX, filebase)
|
|
|| try( "%s%s", SCCSPREFIX, filebase)) {
|
|
Sprintf(buf, output_elsewhere?GET:GET_LOCKED, s);
|
|
Sprintf(lbuf, SCCSDIFF, s, filename);
|
|
cs = "SCCS";
|
|
} else if (statfailed)
|
|
fatal2("can't find %s\n", filename);
|
|
/* else we can't write to it but it's not under a version
|
|
control system, so just proceed. */
|
|
if (cs) {
|
|
if (!statfailed) {
|
|
if ((filestat.st_mode & 0222) != 0)
|
|
/* The owner can write to it. */
|
|
fatal3("file %s seems to be locked by somebody else under %s\n",
|
|
filename, cs);
|
|
/* It might be checked out unlocked. See if it's safe to
|
|
check out the default version locked. */
|
|
if (verbose)
|
|
say3("Comparing file %s to default %s version...\n",
|
|
filename, cs);
|
|
if (system(lbuf))
|
|
fatal3("can't check out file %s: differs from default %s version\n",
|
|
filename, cs);
|
|
}
|
|
if (verbose)
|
|
say3("Checking out file %s from %s...\n", filename, cs);
|
|
if (system(buf) || stat(filename, &filestat))
|
|
fatal3("can't check out file %s from %s\n", filename, cs);
|
|
}
|
|
}
|
|
filemode = filestat.st_mode;
|
|
if (!S_ISREG(filemode))
|
|
fatal2("%s is not a normal file--can't patch\n", filename);
|
|
i_size = filestat.st_size;
|
|
if (out_of_mem) {
|
|
set_hunkmax(); /* make sure dynamic arrays are allocated */
|
|
out_of_mem = FALSE;
|
|
return FALSE; /* force plan b because plan a bombed */
|
|
}
|
|
#ifdef lint
|
|
i_womp = Nullch;
|
|
#else
|
|
i_womp = malloc((MEM)(i_size+2)); /* lint says this may alloc less than */
|
|
/* i_size, but that's okay, I think. */
|
|
#endif
|
|
if (i_womp == Nullch)
|
|
return FALSE;
|
|
if ((ifd = open(filename, 0)) < 0)
|
|
pfatal2("can't open file %s", filename);
|
|
#ifndef lint
|
|
if (read(ifd, i_womp, (int)i_size) != i_size) {
|
|
Close(ifd); /* probably means i_size > 15 or 16 bits worth */
|
|
free(i_womp); /* at this point it doesn't matter if i_womp was */
|
|
return FALSE; /* undersized. */
|
|
}
|
|
#endif
|
|
Close(ifd);
|
|
if (i_size && 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++;
|
|
}
|
|
#ifdef lint
|
|
i_ptr = Null(char**);
|
|
#else
|
|
i_ptr = (char **)malloc((MEM)((iline + 2) * sizeof(char *)));
|
|
#endif
|
|
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)) {
|
|
if (force) {
|
|
if (verbose)
|
|
say2(
|
|
"Warning: this file doesn't appear to be the %s version--patching anyway.\n",
|
|
revision);
|
|
}
|
|
else if (batch) {
|
|
fatal2(
|
|
"this file doesn't appear to be the %s version--aborting.\n", revision);
|
|
}
|
|
else {
|
|
ask2(
|
|
"This file doesn't appear to be the %s version--patch anyway? [n] ",
|
|
revision);
|
|
if (*buf != 'y')
|
|
fatal1("aborted\n");
|
|
}
|
|
}
|
|
else if (verbose)
|
|
say2("Good. This file appears to be the %s version.\n",
|
|
revision);
|
|
}
|
|
return TRUE; /* plan a will work */
|
|
}
|
|
|
|
/* Keep (virtually) nothing in memory. */
|
|
|
|
void
|
|
plan_b(filename)
|
|
char *filename;
|
|
{
|
|
Reg3 FILE *ifp;
|
|
Reg1 int i = 0;
|
|
Reg2 int maxlen = 1;
|
|
Reg4 bool found_revision = (revision == Nullch);
|
|
|
|
using_plan_a = FALSE;
|
|
if ((ifp = fopen(filename, "r")) == Nullfp)
|
|
pfatal2("can't open file %s", filename);
|
|
if ((tifd = creat(TMPINNAME, 0666)) < 0)
|
|
pfatal2("can't open file %s", 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) {
|
|
if (force) {
|
|
if (verbose)
|
|
say2(
|
|
"Warning: this file doesn't appear to be the %s version--patching anyway.\n",
|
|
revision);
|
|
}
|
|
else if (batch) {
|
|
fatal2(
|
|
"this file doesn't appear to be the %s version--aborting.\n", revision);
|
|
}
|
|
else {
|
|
ask2(
|
|
"This file doesn't appear to be the %s version--patch anyway? [n] ",
|
|
revision);
|
|
if (*buf != 'y')
|
|
fatal1("aborted\n");
|
|
}
|
|
}
|
|
else if (verbose)
|
|
say2("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)
|
|
fatal1("out of memory\n");
|
|
for (i=1; ; i++) {
|
|
if (! (i % lines_per_buf)) /* new block */
|
|
if (write(tifd, tibuf[0], BUFFERSIZE) < BUFFERSIZE)
|
|
pfatal1("can't write temp file");
|
|
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)
|
|
pfatal1("can't write temp file");
|
|
break;
|
|
}
|
|
}
|
|
Fclose(ifp);
|
|
Close(tifd);
|
|
if ((tifd = open(TMPINNAME, 0)) < 0) {
|
|
pfatal2("can't reopen file %s", TMPINNAME);
|
|
}
|
|
}
|
|
|
|
/* Fetch a line from the input file, \n terminated, not necessarily \0. */
|
|
|
|
char *
|
|
ifetch(line,whichbuf)
|
|
Reg1 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;
|
|
#ifndef lint /* complains of long accuracy */
|
|
Lseek(tifd, (long)baseline / lines_per_buf * BUFFERSIZE, 0);
|
|
#endif
|
|
if (read(tifd, tibuf[whichbuf], BUFFERSIZE) < 0)
|
|
pfatal2("error reading tmp file %s", TMPINNAME);
|
|
}
|
|
return tibuf[whichbuf] + (tireclen*offline);
|
|
}
|
|
}
|
|
|
|
/* True if the string argument contains the revision number we want. */
|
|
|
|
bool
|
|
rev_in_string(string)
|
|
char *string;
|
|
{
|
|
Reg1 char *s;
|
|
Reg2 int patlen;
|
|
|
|
if (revision == Nullch)
|
|
return TRUE;
|
|
patlen = strlen(revision);
|
|
if (strnEQ(string,revision,patlen) && isspace(string[patlen]))
|
|
return TRUE;
|
|
for (s = string; *s; s++) {
|
|
if (isspace(*s) && strnEQ(s+1, revision, patlen) &&
|
|
isspace(s[patlen+1] )) {
|
|
return TRUE;
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|