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 */
31 /* New patch--prepare to edit another file. */
39 if (i_ptr != Null(char**))
45 i_ptr = Null(char **);
48 using_plan_a = TRUE; /* maybe the next one is smaller */
53 tibuf[0] = tibuf[1] = Nullch;
54 tiline[0] = tiline[1] = -1;
59 /* Constuct the line index, somehow or other. */
65 if (!plan_a(filename))
68 say3("Patching file %s using Plan %s...\n", filename,
69 (using_plan_a ? "A" : "B") );
73 /* Try keeping everything in memory. */
82 char lbuf[MAXLINELEN];
83 int output_elsewhere = strcmp(filename, outname);
84 extern int check_patch;
86 statfailed = stat(filename, &filestat);
87 if (statfailed && ok_to_create_file) {
89 say2("(Creating file %s...)\n",filename);
92 makedirs(filename, TRUE);
93 close(creat(filename, 0666));
94 statfailed = stat(filename, &filestat);
96 if (statfailed && check_patch) {
97 fatal2("%s not found and in check_patch mode.", filename);
99 /* For nonexistent or read-only files, look for RCS or SCCS versions. */
101 || (! output_elsewhere
102 && (/* No one can write to it. */
103 (filestat.st_mode & 0222) == 0
104 /* I can't write to it. */
105 || ((filestat.st_mode & 0022) == 0
106 && filestat.st_uid != myuid)))) {
112 filebase = basename(filename);
113 pathlen = filebase - filename;
115 /* Put any leading path into `s'.
116 Leave room in lbuf for the diff command. */
118 strncpy(s, filename, pathlen);
120 #define try(f,a1,a2) (Sprintf(s + pathlen, f, a1, a2), stat(s, &cstat) == 0)
121 if (( try("RCS/%s%s", filebase, RCSSUFFIX)
122 || try("RCS/%s%s", filebase, "")
123 || try( "%s%s", filebase, RCSSUFFIX))
125 /* Check that RCS file is not working file.
126 Some hosts don't report file name length errors. */
128 || ( (filestat.st_dev ^ cstat.st_dev)
129 | (filestat.st_ino ^ cstat.st_ino)))) {
130 Sprintf(buf, output_elsewhere?CHECKOUT:CHECKOUT_LOCKED, filename);
131 Sprintf(lbuf, RCSDIFF, filename);
133 } else if ( try("SCCS/%s%s", SCCSPREFIX, filebase)
134 || try( "%s%s", SCCSPREFIX, filebase)) {
135 Sprintf(buf, output_elsewhere?GET:GET_LOCKED, s);
136 Sprintf(lbuf, SCCSDIFF, s, filename);
138 } else if (statfailed)
139 fatal2("can't find %s\n", filename);
140 /* else we can't write to it but it's not under a version
141 control system, so just proceed. */
144 if ((filestat.st_mode & 0222) != 0)
145 /* The owner can write to it. */
146 fatal3("file %s seems to be locked by somebody else under %s\n",
148 /* It might be checked out unlocked. See if it's safe to
149 check out the default version locked. */
151 say3("Comparing file %s to default %s version...\n",
154 fatal3("can't check out file %s: differs from default %s version\n",
158 say3("Checking out file %s from %s...\n", filename, cs);
159 if (system(buf) || stat(filename, &filestat))
160 fatal3("can't check out file %s from %s\n", filename, cs);
163 filemode = filestat.st_mode;
164 if (!S_ISREG(filemode))
165 fatal2("%s is not a normal file--can't patch\n", filename);
166 i_size = filestat.st_size;
168 set_hunkmax(); /* make sure dynamic arrays are allocated */
170 return FALSE; /* force plan b because plan a bombed */
175 i_womp = malloc((MEM)(i_size+2)); /* lint says this may alloc less than */
176 /* i_size, but that's okay, I think. */
178 if (i_womp == Nullch)
180 if ((ifd = open(filename, 0)) < 0)
181 pfatal2("can't open file %s", filename);
183 if (read(ifd, i_womp, (int)i_size) != i_size) {
184 Close(ifd); /* probably means i_size > 15 or 16 bits worth */
185 free(i_womp); /* at this point it doesn't matter if i_womp was */
186 return FALSE; /* undersized. */
190 if (i_size && i_womp[i_size-1] != '\n')
191 i_womp[i_size++] = '\n';
192 i_womp[i_size] = '\0';
194 /* count the lines in the buffer so we know how many pointers we need */
197 for (s=i_womp; *s; s++) {
202 i_ptr = Null(char**);
204 i_ptr = (char **)malloc((MEM)((iline + 2) * sizeof(char *)));
206 if (i_ptr == Null(char **)) { /* shucks, it was a near thing */
207 free((char *)i_womp);
211 /* now scan the buffer and build pointer array */
214 i_ptr[iline] = i_womp;
215 for (s=i_womp; *s; s++) {
217 i_ptr[++iline] = s+1; /* these are NOT null terminated */
219 input_lines = iline - 1;
221 /* now check for revision, if any */
223 if (revision != Nullch) {
224 if (!rev_in_string(i_womp)) {
228 "Warning: this file doesn't appear to be the %s version--patching anyway.\n",
233 "this file doesn't appear to be the %s version--aborting.\n", revision);
237 "This file doesn't appear to be the %s version--patch anyway? [n] ",
244 say2("Good. This file appears to be the %s version.\n",
247 return TRUE; /* plan a will work */
250 /* Keep (virtually) nothing in memory. */
259 Reg4 bool found_revision = (revision == Nullch);
261 using_plan_a = FALSE;
262 if ((ifp = fopen(filename, "r")) == Nullfp)
263 pfatal2("can't open file %s", filename);
264 if ((tifd = creat(TMPINNAME, 0666)) < 0)
265 pfatal2("can't open file %s", TMPINNAME);
266 while (fgets(buf, sizeof buf, ifp) != Nullch) {
267 if (revision != Nullch && !found_revision && rev_in_string(buf))
268 found_revision = TRUE;
269 if ((i = strlen(buf)) > maxlen)
270 maxlen = i; /* find longest line */
272 if (revision != Nullch) {
273 if (!found_revision) {
277 "Warning: this file doesn't appear to be the %s version--patching anyway.\n",
282 "this file doesn't appear to be the %s version--aborting.\n", revision);
286 "This file doesn't appear to be the %s version--patch anyway? [n] ",
293 say2("Good. This file appears to be the %s version.\n",
296 Fseek(ifp, 0L, 0); /* rewind file */
297 lines_per_buf = BUFFERSIZE / maxlen;
299 tibuf[0] = malloc((MEM)(BUFFERSIZE + 1));
300 tibuf[1] = malloc((MEM)(BUFFERSIZE + 1));
301 if (tibuf[1] == Nullch)
302 fatal1("out of memory\n");
304 if (! (i % lines_per_buf)) /* new block */
305 if (write(tifd, tibuf[0], BUFFERSIZE) < BUFFERSIZE)
306 pfatal1("can't write temp file");
307 if (fgets(tibuf[0] + maxlen * (i%lines_per_buf), maxlen + 1, ifp)
310 if (i % lines_per_buf)
311 if (write(tifd, tibuf[0], BUFFERSIZE) < BUFFERSIZE)
312 pfatal1("can't write temp file");
318 if ((tifd = open(TMPINNAME, 0)) < 0) {
319 pfatal2("can't reopen file %s", TMPINNAME);
323 /* Fetch a line from the input file, \n terminated, not necessarily \0. */
326 ifetch(line,whichbuf)
328 int whichbuf; /* ignored when file in memory */
330 if (line < 1 || line > input_lines)
335 LINENUM offline = line % lines_per_buf;
336 LINENUM baseline = line - offline;
338 if (tiline[0] == baseline)
340 else if (tiline[1] == baseline)
343 tiline[whichbuf] = baseline;
344 #ifndef lint /* complains of long accuracy */
345 Lseek(tifd, (long)baseline / lines_per_buf * BUFFERSIZE, 0);
347 if (read(tifd, tibuf[whichbuf], BUFFERSIZE) < 0)
348 pfatal2("error reading tmp file %s", TMPINNAME);
350 return tibuf[whichbuf] + (tireclen*offline);
354 /* True if the string argument contains the revision number we want. */
357 rev_in_string(string)
363 if (revision == Nullch)
365 patlen = strlen(revision);
366 if (strnEQ(string,revision,patlen) && isspace((unsigned char)string[patlen]))
368 for (s = string; *s; s++) {
369 if (isspace((unsigned char)*s) && strnEQ(s+1, revision, patlen) &&
370 isspace((unsigned char)s[patlen+1] )) {