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-rw-r--r--gnu/usr.bin/patch/inp.c407
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diff --git a/gnu/usr.bin/patch/inp.c b/gnu/usr.bin/patch/inp.c
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-/* $Header: /home/ncvs/src/gnu/usr.bin/patch/inp.c,v 1.5 1997/03/17 01:44:40 jmg Exp $
- *
- * $Log: inp.c,v $
- * Revision 1.5 1997/03/17 01:44:40 jmg
- * fix compilation warnings in patch... (with slight modification)
- *
- * also remove -Wall that I acidentally committed last time I was here...
- *
- * Submitted-by: Philippe Charnier
- *
- * Closes PR#2998
- *
- * Revision 1.4 1997/02/13 21:10:39 jmg
- * Fix a problem with patch in that is will always default, even when the
- * controlling terminal is closed. Now the function ask() will return 1 when th
- * input is known to come from a file or terminal, or it will return 0 when ther
- * was a read error.
- *
- * Modified the question "Skip patch?" so that on an error from ask it will skip
- * the patch instead of looping.
- *
- * Closes PR#777
- *
- * 2.2 candidate
- *
- * Revision 1.3 1995/05/30 05:02:31 rgrimes
- * Remove trailing whitespace.
- *
- * 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%s", filebase, "")
- || 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 {
- (void) 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 {
- (void) 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((unsigned char)string[patlen]))
- return TRUE;
- for (s = string; *s; s++) {
- if (isspace((unsigned char)*s) && strnEQ(s+1, revision, patlen) &&
- isspace((unsigned char)s[patlen+1] )) {
- return TRUE;
- }
- }
- return FALSE;
-}
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