1 /* $FreeBSD: src/gnu/usr.bin/patch/inp.c,v 1.10.2.1 2002/04/30 20:40:02 gad Exp $
4 * Revision 2.0.1.1 88/06/03 15:06:13 lwall
5 * patch10: made a little smarter about sccs files
7 * Revision 2.0 86/09/17 15:37:02 lwall
8 * Baseline for netwide release.
19 /* Input-file-with-indexable-lines abstract type */
21 static long i_size; /* size of the input file */
22 static char *i_womp; /* plan a buffer for entire file */
23 static char **i_ptr; /* pointers to lines in i_womp */
25 static int tifd = -1; /* plan b virtual string array */
26 static char *tibuf[2]; /* plan b buffers */
27 static LINENUM tiline[2] = {-1, -1}; /* 1st line in each buffer */
28 static LINENUM lines_per_buf; /* how many lines per buffer */
29 static int tireclen; /* length of records in tmp file */
32 * New patch--prepare to edit another file.
40 if (i_ptr != Null(char**))
46 i_ptr = Null(char **);
49 using_plan_a = TRUE; /* maybe the next one is smaller */
54 tibuf[0] = tibuf[1] = Nullch;
55 tiline[0] = tiline[1] = -1;
61 * Constuct the line index, somehow or other.
64 scan_input(char *filename)
66 if (!plan_a(filename))
69 say3("Patching file %s using Plan %s...\n", filename,
70 (using_plan_a ? "A" : "B") );
75 * Try keeping everything in memory.
78 plan_a(char *filename)
83 char lbuf[MAXLINELEN];
84 int output_elsewhere = strcmp(filename, outname);
85 extern int check_patch;
87 statfailed = stat(filename, &filestat);
88 if (statfailed && ok_to_create_file) {
90 say2("(Creating file %s...)\n",filename);
93 makedirs(filename, TRUE);
94 close(creat(filename, 0666));
95 statfailed = stat(filename, &filestat);
97 if (statfailed && check_patch) {
98 fatal2("%s not found and in check_patch mode.", filename);
100 /* For nonexistent or read-only files, look for RCS or SCCS versions. */
102 || (! output_elsewhere
103 && (/* No one can write to it. */
104 (filestat.st_mode & 0222) == 0
105 /* I can't write to it. */
106 || ((filestat.st_mode & 0022) == 0
107 && filestat.st_uid != myuid)))) {
113 filebase = basename(filename);
114 pathlen = filebase - filename;
116 /* Put any leading path into `s'.
117 Leave room in lbuf for the diff command. */
119 strncpy(s, filename, pathlen);
121 #define try(f,a1,a2) (Sprintf(s + pathlen, f, a1, a2), stat(s, &cstat) == 0)
122 if (( try("RCS/%s%s", filebase, RCSSUFFIX)
123 || try("RCS/%s%s", filebase, "")
124 || try( "%s%s", filebase, RCSSUFFIX))
126 /* Check that RCS file is not working file.
127 Some hosts don't report file name length errors. */
129 || ( (filestat.st_dev ^ cstat.st_dev)
130 | (filestat.st_ino ^ cstat.st_ino)))) {
131 Sprintf(buf, output_elsewhere?CHECKOUT:CHECKOUT_LOCKED, filename);
132 Sprintf(lbuf, RCSDIFF, filename);
134 } else if ( try("SCCS/%s%s", SCCSPREFIX, filebase)
135 || try( "%s%s", SCCSPREFIX, filebase)) {
136 Sprintf(buf, output_elsewhere?GET:GET_LOCKED, s);
137 Sprintf(lbuf, SCCSDIFF, s, filename);
139 } else if (statfailed)
140 fatal2("can't find %s\n", filename);
141 /* else we can't write to it but it's not under a version
142 control system, so just proceed. */
145 if ((filestat.st_mode & 0222) != 0)
146 /* The owner can write to it. */
147 fatal3("file %s seems to be locked by somebody else under %s\n",
149 /* It might be checked out unlocked. See if it's safe to
150 check out the default version locked. */
152 say3("Comparing file %s to default %s version...\n",
155 fatal3("can't check out file %s: differs from default %s version\n",
159 say3("Checking out file %s from %s...\n", filename, cs);
160 if (system(buf) || stat(filename, &filestat))
161 fatal3("can't check out file %s from %s\n", filename, cs);
164 filemode = filestat.st_mode;
165 if (!S_ISREG(filemode))
166 fatal2("%s is not a normal file--can't patch\n", filename);
167 i_size = filestat.st_size;
169 set_hunkmax(); /* make sure dynamic arrays are allocated */
171 return FALSE; /* force plan b because plan a bombed */
176 i_womp = malloc((MEM)(i_size+2)); /* lint says this may alloc less than */
177 /* i_size, but that's okay, I think. */
179 if (i_womp == Nullch)
181 if ((ifd = open(filename, 0)) < 0)
182 pfatal2("can't open file %s", filename);
184 if (read(ifd, i_womp, (int)i_size) != i_size) {
185 Close(ifd); /* probably means i_size > 15 or 16 bits worth */
186 free(i_womp); /* at this point it doesn't matter if i_womp was */
187 return FALSE; /* undersized. */
191 if (i_size && i_womp[i_size-1] != '\n')
192 i_womp[i_size++] = '\n';
193 i_womp[i_size] = '\0';
195 /* count the lines in the buffer so we know how many pointers we need */
198 for (s=i_womp; *s; s++) {
203 i_ptr = Null(char**);
205 i_ptr = (char **)malloc((MEM)((iline + 2) * sizeof(char *)));
207 if (i_ptr == Null(char **)) { /* shucks, it was a near thing */
208 free((char *)i_womp);
212 /* now scan the buffer and build pointer array */
215 i_ptr[iline] = i_womp;
216 for (s=i_womp; *s; s++) {
218 i_ptr[++iline] = s+1; /* these are NOT null terminated */
220 input_lines = iline - 1;
222 /* now check for revision, if any */
224 if (revision != Nullch) {
225 if (!rev_in_string(i_womp)) {
229 "Warning: this file doesn't appear to be the %s version--patching anyway.\n",
234 "this file doesn't appear to be the %s version--aborting.\n", revision);
238 "This file doesn't appear to be the %s version--patch anyway? [n] ",
245 say2("Good. This file appears to be the %s version.\n",
248 return TRUE; /* plan a will work */
252 * Keep (virtually) nothing in memory.
255 plan_b(char *filename)
260 Reg4 bool found_revision = (revision == Nullch);
262 using_plan_a = FALSE;
263 if ((ifp = fopen(filename, "r")) == Nullfp)
264 pfatal2("can't open file %s", filename);
265 if ((tifd = creat(TMPINNAME, 0666)) < 0)
266 pfatal2("can't open file %s", TMPINNAME);
267 while (fgets(buf, sizeof buf, ifp) != Nullch) {
268 if (revision != Nullch && !found_revision && rev_in_string(buf))
269 found_revision = TRUE;
270 if ((i = strlen(buf)) > maxlen)
271 maxlen = i; /* find longest line */
273 if (revision != Nullch) {
274 if (!found_revision) {
278 "Warning: this file doesn't appear to be the %s version--patching anyway.\n",
283 "this file doesn't appear to be the %s version--aborting.\n", revision);
287 "This file doesn't appear to be the %s version--patch anyway? [n] ",
294 say2("Good. This file appears to be the %s version.\n",
297 Fseek(ifp, 0L, 0); /* rewind file */
298 lines_per_buf = BUFFERSIZE / maxlen;
300 tibuf[0] = malloc((MEM)(BUFFERSIZE + 1));
301 tibuf[1] = malloc((MEM)(BUFFERSIZE + 1));
302 if (tibuf[1] == Nullch)
303 fatal1("out of memory\n");
305 if (! (i % lines_per_buf)) /* new block */
306 if (write(tifd, tibuf[0], BUFFERSIZE) < BUFFERSIZE)
307 pfatal1("can't write temp file");
308 if (fgets(tibuf[0] + maxlen * (i%lines_per_buf), maxlen + 1, ifp)
311 if (i % lines_per_buf)
312 if (write(tifd, tibuf[0], BUFFERSIZE) < BUFFERSIZE)
313 pfatal1("can't write temp file");
319 if ((tifd = open(TMPINNAME, 0)) < 0) {
320 pfatal2("can't reopen file %s", TMPINNAME);
325 * Fetch a line from the input file, \n terminated, not necessarily \0.
328 ifetch(line,whichbuf)
330 int whichbuf; /* ignored when file in memory */
332 if (line < 1 || line > input_lines)
337 LINENUM offline = line % lines_per_buf;
338 LINENUM baseline = line - offline;
340 if (tiline[0] == baseline)
342 else if (tiline[1] == baseline)
345 tiline[whichbuf] = baseline;
346 #ifndef lint /* complains of long accuracy */
347 Lseek(tifd, (long)baseline / lines_per_buf * BUFFERSIZE, 0);
349 if (read(tifd, tibuf[whichbuf], BUFFERSIZE) < 0)
350 pfatal2("error reading tmp file %s", TMPINNAME);
352 return tibuf[whichbuf] + (tireclen*offline);
357 * True if the string argument contains the revision number we want.
360 rev_in_string(char *string)
365 if (revision == Nullch)
367 patlen = strlen(revision);
368 if (strnEQ(string,revision,patlen) && isspace((unsigned char)string[patlen]))
370 for (s = string; *s; s++) {
371 if (isspace((unsigned char)*s) && strnEQ(s+1, revision, patlen) &&
372 isspace((unsigned char)s[patlen+1] )) {