int
invopen(INVCONTROL *invcntl, char *invname, char *invpost, int stat)
{
int read_index;
if ((invcntl->invfile = vpfopen(invname, ((stat == 0) ? "rb" : "r+b"))) == NULL) {
/* If db created without '-f', but now invoked with '-f cscope.out',
* we need to check for 'cscope.in.out', rather than 'cscope.out.in':
* I.e, hack around our own violation of the inverse db naming convention */
if (!invflipname(invname, INVNAME2, INVNAME)) {
if ((invcntl->invfile = vpfopen(invname, ((stat == 0) ? "rb" : "r+b"))))
goto openedinvname;
invflipname(invname, INVNAME, INVNAME2); /* change back for err msg */
}
/* more silliness: if you create the db with '-f cscope', then try to open
* it without '-f cscope', you'll fail unless we check for 'cscope.out.in'
* here. */
else if (!invflipname(invname, INVNAME, INVNAME2)) {
if ((invcntl->invfile = vpfopen(invname, ((stat == 0) ? "rb" : "r+b"))))
goto openedinvname;
invflipname(invname, INVNAME2, INVNAME); /* change back for err msg */
}
invcannotopen(invname);
return(-1);
}
openedinvname:
if (fread(&invcntl->param, sizeof(invcntl->param), 1, invcntl->invfile) == 0) {
fprintf(stderr, "%s: empty inverted file\n", argv0);
goto closeinv;
}
if (invcntl->param.version != FMTVERSION) {
fprintf(stderr, "%s: cannot read old index format; use -U option to force database to rebuild\n", argv0);
goto closeinv;
}
assert(invcntl->param.sizeblk == sizeof(t_logicalblk));
if (stat == 0 && invcntl->param.filestat == INVALONE) {
fprintf(stderr, "%s: inverted file is locked\n", argv0);
goto closeinv;
}
if ((invcntl->postfile = vpfopen(invpost, ((stat == 0) ? "rb" : "r+b"))) == NULL) {
/* exact same naming convention hacks as above for invname */
if (!invflipname(invpost, INVPOST2, INVPOST)) {
if ((invcntl->postfile = vpfopen(invpost, ((stat == 0) ? "rb" : "r+b"))))
goto openedinvpost;
invflipname(invpost, INVPOST, INVPOST2); /* change back for err msg */
} else if (!invflipname(invpost, INVPOST, INVPOST2)) {
if ((invcntl->postfile = vpfopen(invpost,((stat == 0)?"rb":"r+b"))))
goto openedinvpost;
invflipname(invpost, INVPOST2, INVPOST); /* change back for err msg */
}
invcannotopen(invpost);
goto closeinv;
}
openedinvpost:
/* allocate core for a logical block */
if ((invcntl->logblk = malloc((unsigned) invcntl->param.sizeblk)) == NULL) {
invcannotalloc((unsigned) invcntl->param.sizeblk);
goto closeboth;
}
/* allocate for and read in superfinger */
read_index = 1;
invcntl->iindex = NULL;
#if SHARE
if (invcntl->param.share == 1) {
key_t shm_key;
struct shmid_ds shm_buf;
int shm_id;
/* see if the shared segment exists */
shm_key = ftok(invname, 2);
shm_id = shmget(shm_key, 0, 0);
/* Failure simply means (hopefully) that segment doesn't exists */
if (shm_id == -1) {
/* Have to give general write permission due to AMdahl not having protected segments */
shm_id = shmget(shm_key, invcntl->param.supsize + sizeof(long), IPC_CREAT | 0666);
if (shm_id == -1)
perror("Could not create shared memory segment");
} else
read_index = 0;
if (shm_id != -1) {
invcntl->iindex = shmat(shm_id, 0, ((read_index) ? 0 : SHM_RDONLY));
if (invcntl->iindex == (char *)ERR) {
fprintf(stderr, "%s: shared memory link failed\n", argv0);
invcntl->iindex = NULL;
read_index = 1;
}
}
}
#endif
if (invcntl->iindex == NULL)
/* FIXME HBB: magic number alert (4) */
invcntl->iindex = malloc((unsigned) invcntl->param.supsize
+ 4 *sizeof(long));
if (invcntl->iindex == NULL) {
invcannotalloc((unsigned) invcntl->param.supsize);
free(invcntl->logblk);
goto closeboth;
}
if (read_index) {
fseek(invcntl->invfile, invcntl->param.startbyte, SEEK_SET);
fread(invcntl->iindex, (int) invcntl->param.supsize, 1,
invcntl->invfile);
}
invcntl->numblk = -1;
if (boolready() == -1) {
closeboth:
fclose(invcntl->postfile);
closeinv:
fclose(invcntl->invfile);
return(-1);
}
/* write back out the control block if anything changed */
invcntl->param.filestat = stat;
if (stat > invcntl->param.filestat ) {
rewind(invcntl->invfile);
fwrite(&invcntl->param, sizeof(invcntl->param), 1, invcntl->invfile);
}
return(1);
}
long
invmake(char *invname, char *invpost, FILE *infile)
{
unsigned char *s;
long num;
int i;
long fileindex = 0; /* initialze, to avoid warning */
unsigned postsize = POSTINC * sizeof(POSTING);
unsigned long *intptr;
char line[TERMMAX];
long tlong;
PARAM param;
POSTING posting;
char temp[BLOCKSIZE];
#if STATS
int j;
unsigned maxtermlen = 0;
#endif
/* output file */
if ((outfile = vpfopen(invname, "w+b")) == NULL) {
invcannotopen(invname);
return(0);
}
indexfile = invname;
fseek(outfile, BUFSIZ, SEEK_SET);
/* posting file */
if ((fpost = vpfopen(invpost, "wb")) == NULL) {
invcannotopen(invpost);
return(0);
}
postingfile = invpost;
nextpost = 0;
/* get space for the postings list */
if ((POST = malloc(postsize)) == NULL) {
invcannotalloc(postsize);
return(0);
}
postptr = POST;
/* get space for the superfinger (superindex) */
if ((SUPFING = malloc(supersize)) == NULL) {
invcannotalloc(supersize);
return(0);
}
supfing = SUPFING;
/* FIXME HBB: magic number alert (40) */
supintsize = supersize / 40;
/* also for the superfinger index */
if ((SUPINT = malloc(supintsize * sizeof(long))) == NULL) {
invcannotalloc(supintsize * sizeof(long));
return(0);
}
supint = SUPINT;
supint++; /* leave first term open for a count */
/* initialize using an empty term */
strcpy(thisterm, "");
*supint++ = 0;
*supfing++ = ' ';
*supfing++ = '\0';
nextsupfing = 2;
#if DEBUG || STATS
totpost = 0L;
#endif
totterm = 0L;
numpost = 1;
/* set up as though a block had come and gone, i.e., set up for new block */
/* 3 longs needed for: numinvitems, next block, and previous block */
amtused = 3 * sizeof(long);
numinvitems = 0;
numlogblk = 0;
lastinblk = sizeof(t_logicalblk);
/* now loop as long as more to read (till eof) */
while (fgets(line, TERMMAX, infile) != NULL) {
#if DEBUG || STATS
++totpost;
#endif
s = strchr(line, SEP);
if (s != NULL) {
*s = '\0';
}
else {
continue;
}
#if STATS
if ((i = strlen(line)) > maxtermlen) {
maxtermlen = i;
}
#endif
#if DEBUG
printf("%ld: %s ", totpost, line);
fflush(stdout);
#endif
if (strcmp(thisterm, line) == 0) {
if (postptr + 10 > POST + postsize / sizeof(POSTING)) {
i = postptr - POST;
postsize += POSTINC * sizeof(POSTING);
if ((POST = realloc(POST, postsize)) == NULL) {
invcannotalloc(postsize);
return(0);
}
postptr = i + POST;
#if DEBUG
printf("reallocated post space to %u, totpost=%ld\n",
postsize, totpost);
#endif
}
numpost++;
} else {
/* have a new term */
if (!invnewterm()) {
return(0);
}
strcpy(thisterm, line);
numpost = 1;
postptr = POST;
fileindex = 0;
}
/* get the new posting */
num = *++s - '!';
i = 1;
do {
num = BASE * num + *++s - '!';
} while (++i < PRECISION);
posting.lineoffset = num;
while (++fileindex < nsrcfiles && num > srcoffset[fileindex]) {
;
}
posting.fileindex = --fileindex;
posting.type = *++s;
++s;
if (*s != '\n') {
num = *++s - '!';
while (*++s != '\n') {
num = BASE * num + *s - '!';
}
posting.fcnoffset = num;
}
else {
posting.fcnoffset = 0;
}
*postptr++ = posting;
#if DEBUG
printf("%ld %ld %ld %ld\n", posting.fileindex,
posting.fcnoffset, posting.lineoffset, posting.type);
fflush(stdout);
#endif
}
if (!invnewterm()) {
return(0);
}
/* now clean up final block */
logicalblk.invblk[0] = numinvitems;
/* loops pointer around to start */
logicalblk.invblk[1] = 0;
logicalblk.invblk[2] = numlogblk - 1;
if (fwrite(&logicalblk, sizeof(t_logicalblk), 1, outfile) == 0) {
goto cannotwrite;
}
numlogblk++;
/* write out block to save space. what in it doesn't matter */
if (fwrite(&logicalblk, sizeof(t_logicalblk), 1, outfile) == 0) {
goto cannotwrite;
}
/* finish up the super finger */
*SUPINT = numlogblk;
/* add to the offsets the size of the offset pointers */
intptr = (SUPINT + 1);
i = (char *)supint - (char *)SUPINT;
while (intptr < supint)
*intptr++ += i;
/* write out the offsets (1 for the N at start) and the super finger */
if (fwrite(SUPINT, sizeof(*SUPINT), numlogblk + 1, outfile) == 0 ||
fwrite(SUPFING, 1, supfing - SUPFING, outfile) == 0) {
goto cannotwrite;
}
/* save the size for reference later */
nextsupfing = sizeof(long) + sizeof(long) * numlogblk + (supfing - SUPFING);
/* make sure the file ends at a logical block boundary. This is
necessary for invinsert to correctly create extended blocks
*/
i = nextsupfing % sizeof(t_logicalblk);
/* write out junk to fill log blk */
if (fwrite(temp, sizeof(t_logicalblk) - i, 1, outfile) == 0 ||
fflush(outfile) == EOF) { /* rewind doesn't check for write failure */
goto cannotwrite;
}
/* write the control area */
rewind(outfile);
param.version = FMTVERSION;
param.filestat = 0;
param.sizeblk = sizeof(t_logicalblk);
param.startbyte = (numlogblk + 1) * sizeof(t_logicalblk) + BUFSIZ;;
param.supsize = nextsupfing;
param.cntlsize = BUFSIZ;
param.share = 0;
if (fwrite(¶m, sizeof(param), 1, outfile) == 0) {
goto cannotwrite;
}
for (i = 0; i < 10; i++) /* for future use */
if (fwrite(&zerolong, sizeof(zerolong), 1, outfile) == 0) {
goto cannotwrite;
}
/* make first block loop backwards to last block */
if (fflush(outfile) == EOF) { /* fseek doesn't check for write failure */
goto cannotwrite;
}
/* get to second word first block */
fseek(outfile, BUFSIZ + 2 * sizeof(long), SEEK_SET);
tlong = numlogblk - 1;
if (fwrite(&tlong, sizeof(tlong), 1, outfile) == 0 ||
fclose(outfile) == EOF) {
cannotwrite:
invcannotwrite(invname);
return(0);
}
if (fclose(fpost) == EOF) {
invcannotwrite(postingfile);
return(0);
}
--totterm; /* don't count null term */
#if STATS
printf("logical blocks = %d, postings = %ld, terms = %ld, max term length = %d\n",
numlogblk, totpost, totterm, maxtermlen);
if (showzipf) {
printf("\n************* ZIPF curve ****************\n");
for (j = ZIPFSIZE; j > 1; j--)
if (zipf[j])
break;
for (i = 1; i < j; ++i) {
printf("%3d -%6d ", i, zipf[i]);
if (i % 6 == 0) putchar('\n');
}
printf(">%d-%6d\n", ZIPFSIZE, zipf[0]);
}
#endif
/* free all malloc'd memory */
free(POST);
free(SUPFING);
free(SUPINT);
return(totterm);
}
static void
build(void)
{
int i;
FILE *oldrefs; /* old cross-reference file */
time_t reftime; /* old crossref modification time */
char *file; /* current file */
char *oldfile; /* file in old cross-reference */
char newdir[PATHLEN + 1]; /* directory in new cross-reference */
char olddir[PATHLEN + 1]; /* directory in old cross-reference */
char oldname[PATHLEN + 1]; /* name in old cross-reference */
int oldnum; /* number in old cross-ref */
struct stat statstruct; /* file status */
int firstfile; /* first source file in pass */
int lastfile; /* last source file in pass */
int built = 0; /* built crossref for these files */
int copied = 0; /* copied crossref for these files */
BOOL interactive = YES; /* output progress messages */
/*
* normalize the current directory relative to the home directory so
* the cross-reference is not rebuilt when the user's login is moved
*/
(void) strcpy(newdir, currentdir);
if (strcmp(currentdir, home) == 0) {
(void) strcpy(newdir, "$HOME");
} else if (strncmp(currentdir, home, strlen(home)) == 0) {
(void) sprintf(newdir, "$HOME%s", currentdir + strlen(home));
}
/* sort the source file names (needed for rebuilding) */
qsort((char *)srcfiles, (unsigned)nsrcfiles, sizeof (char *), compare);
/*
* if there is an old cross-reference and its current directory
* matches or this is an unconditional build
*/
if ((oldrefs = vpfopen(reffile, "r")) != NULL && unconditional == NO &&
fscanf(oldrefs, "cscope %d %s", &fileversion, olddir) == 2 &&
(strcmp(olddir, currentdir) == 0 || /* remain compatible */
strcmp(olddir, newdir) == 0)) {
/* get the cross-reference file's modification time */
(void) fstat(fileno(oldrefs), &statstruct);
reftime = statstruct.st_mtime;
if (fileversion >= 8) {
BOOL oldcompress = YES;
BOOL oldinvertedindex = NO;
BOOL oldtruncatesyms = NO;
int c;
/* see if there are options in the database */
for (;;) {
while ((c = getc(oldrefs)) == ' ') {
}
if (c != '-') {
(void) ungetc(c, oldrefs);
break;
}
switch (c = getc(oldrefs)) {
case 'c': /* ASCII characters only */
oldcompress = NO;
break;
case 'q': /* quick search */
oldinvertedindex = YES;
(void) fscanf(oldrefs,
"%ld", &totalterms);
break;
case 'T':
/* truncate symbols to 8 characters */
oldtruncatesyms = YES;
break;
}
}
/* check the old and new option settings */
if (oldcompress != compress ||
oldtruncatesyms != truncatesyms) {
(void) fprintf(stderr,
"cscope: -c or -T option mismatch between "
"command line and old symbol database\n");
goto force;
}
if (oldinvertedindex != invertedindex) {
(void) fprintf(stderr,
"cscope: -q option mismatch between "
"command line and old symbol database\n");
if (invertedindex == NO) {
removeindex();
}
goto outofdate;
}
/* seek to the trailer */
if (fscanf(oldrefs, "%ld", &traileroffset) != 1 ||
fseek(oldrefs, traileroffset, 0) == -1) {
(void) fprintf(stderr,
"cscope: incorrect symbol database file "
"format\n");
goto force;
}
}
/* if assuming that some files have changed */
if (fileschanged == YES) {
goto outofdate;
}
/* see if the view path is the same */
if (fileversion >= 13 &&
samelist(oldrefs, vpdirs, vpndirs) == NO) {
goto outofdate;
}
/* see if the directory lists are the same */
if (samelist(oldrefs, srcdirs, nsrcdirs) == NO ||
samelist(oldrefs, incdirs, nincdirs) == NO ||
fscanf(oldrefs, "%d", &oldnum) != 1 ||
fileversion >= 9 && fscanf(oldrefs, "%*s") != 0) {
/* skip the string space size */
goto outofdate;
}
/*
* see if the list of source files is the same and
* none have been changed up to the included files
*/
for (i = 0; i < nsrcfiles; ++i) {
if (fscanf(oldrefs, "%s", oldname) != 1 ||
strnotequal(oldname, srcfiles[i]) ||
vpstat(srcfiles[i], &statstruct) != 0 ||
statstruct.st_mtime > reftime) {
goto outofdate;
}
}
/* the old cross-reference is up-to-date */
/* so get the list of included files */
while (i++ < oldnum && fscanf(oldrefs, "%s", oldname) == 1) {
addsrcfile(oldname);
}
(void) fclose(oldrefs);
return;
outofdate:
/* if the database format has changed, rebuild it all */
if (fileversion != FILEVERSION) {
(void) fprintf(stderr,
"cscope: converting to new symbol database file "
"format\n");
goto force;
}
/* reopen the old cross-reference file for fast scanning */
if ((symrefs = vpopen(reffile, O_RDONLY)) == -1) {
cannotopen(reffile);
myexit(1);
}
/* get the first file name in the old cross-reference */
blocknumber = -1;
(void) readblock(); /* read the first cross-ref block */
(void) scanpast('\t'); /* skip the header */
oldfile = getoldfile();
} else { /* force cross-referencing of all the source files */
force:
reftime = 0;
oldfile = NULL;
}
/* open the new cross-reference file */
if ((newrefs = fopen(newreffile, "w")) == NULL) {
cannotopen(newreffile);
myexit(1);
}
if (invertedindex == YES && (postings = fopen(temp1, "w")) == NULL) {
cannotopen(temp1);
cannotindex();
}
(void) fprintf(stderr, "cscope: building symbol database\n");
putheader(newdir);
fileversion = FILEVERSION;
if (buildonly == YES && !isatty(0)) {
interactive = NO;
} else {
initprogress();
}
/* output the leading tab expected by crossref() */
dbputc('\t');
/*
* make passes through the source file list until the last level of
* included files is processed
*/
firstfile = 0;
lastfile = nsrcfiles;
if (invertedindex == YES) {
srcoffset = mymalloc((nsrcfiles + 1) * sizeof (long));
}
for (;;) {
/* get the next source file name */
for (fileindex = firstfile; fileindex < lastfile; ++fileindex) {
/* display the progress about every three seconds */
if (interactive == YES && fileindex % 10 == 0) {
if (copied == 0) {
progress("%ld files built",
(long)built, 0L);
} else {
progress("%ld files built, %ld "
"files copied", (long)built,
(long)copied);
}
}
/* if the old file has been deleted get the next one */
file = srcfiles[fileindex];
while (oldfile != NULL && strcmp(file, oldfile) > 0) {
oldfile = getoldfile();
}
/*
* if there isn't an old database or this is
* a new file
*/
if (oldfile == NULL || strcmp(file, oldfile) < 0) {
crossref(file);
++built;
} else if (vpstat(file, &statstruct) == 0 &&
statstruct.st_mtime > reftime) {
/* if this file was modified */
crossref(file);
++built;
/*
* skip its old crossref so modifying the last
* source file does not cause all included files
* to be built. Unfortunately a new file that
* is alphabetically last will cause all
* included files to be built, but this is
* less likely
*/
oldfile = getoldfile();
} else { /* copy its cross-reference */
putfilename(file);
if (invertedindex == YES) {
copyinverted();
} else {
copydata();
}
++copied;
oldfile = getoldfile();
}
}
/* see if any included files were found */
if (lastfile == nsrcfiles) {
break;
}
firstfile = lastfile;
lastfile = nsrcfiles;
if (invertedindex == YES) {
srcoffset = myrealloc(srcoffset,
(nsrcfiles + 1) * sizeof (long));
}
/* sort the included file names */
qsort((char *)&srcfiles[firstfile],
(unsigned)(lastfile - firstfile), sizeof (char *), compare);
}
/* add a null file name to the trailing tab */
putfilename("");
dbputc('\n');
/* get the file trailer offset */
traileroffset = dboffset;
/*
* output the view path and source and include directory and
* file lists
*/
putlist(vpdirs, vpndirs);
putlist(srcdirs, nsrcdirs);
putlist(incdirs, nincdirs);
putlist(srcfiles, nsrcfiles);
if (fflush(newrefs) == EOF) {
/* rewind doesn't check for write failure */
cannotwrite(newreffile);
/* NOTREACHED */
}
/* create the inverted index if requested */
if (invertedindex == YES) {
char sortcommand[PATHLEN + 1];
if (fflush(postings) == EOF) {
cannotwrite(temp1);
/* NOTREACHED */
}
(void) fstat(fileno(postings), &statstruct);
(void) fprintf(stderr,
"cscope: building symbol index: temporary file size is "
"%ld bytes\n", statstruct.st_size);
(void) fclose(postings);
/*
* sort -T is broken until it is fixed we don't have too much choice
*/
/*
* (void) sprintf(sortcommand, "sort -y -T %s %s", tmpdir, temp1);
*/
(void) sprintf(sortcommand, "LC_ALL=C sort %s", temp1);
if ((postings = popen(sortcommand, "r")) == NULL) {
(void) fprintf(stderr,
"cscope: cannot open pipe to sort command\n");
cannotindex();
} else {
if ((totalterms = invmake(newinvname, newinvpost,
postings)) > 0) {
movefile(newinvname, invname);
movefile(newinvpost, invpost);
} else {
cannotindex();
}
(void) pclose(postings);
}
(void) unlink(temp1);
(void) free(srcoffset);
(void) fprintf(stderr,
"cscope: index has %ld references to %ld symbols\n",
npostings, totalterms);
}
/* rewrite the header with the trailer offset and final option list */
rewind(newrefs);
putheader(newdir);
(void) fclose(newrefs);
/* close the old database file */
if (symrefs >= 0) {
(void) close(symrefs);
}
if (oldrefs != NULL) {
(void) fclose(oldrefs);
}
/* replace it with the new database file */
movefile(newreffile, reffile);
}
void
makefilelist(void)
{
static BOOL firstbuild = YES; /* first time through */
FILE *names; /* name file pointer */
char dir[PATHLEN + 1];
char path[PATHLEN + 1];
struct stat statstruct;
char *file;
char *s;
int i, j;
/* if there are source file arguments */
if (fileargc > 0) {
/* put them in a list that can be expanded */
for (i = 0; i < fileargc; ++i) {
file = fileargv[i];
if (infilelist(file) == NO) {
if (vpaccess(file, READ) == 0) {
addsrcfile(file);
} else {
(void) fprintf(stderr,
"cscope: cannot find file %s\n",
file);
errorsfound = YES;
}
}
}
return;
}
/* see if a file name file exists */
if (namefile == NULL && vpaccess(NAMEFILE, READ) == 0) {
namefile = NAMEFILE;
}
/* if there is a file of source file names */
if (namefile != NULL) {
if ((names = vpfopen(namefile, "r")) == NULL) {
cannotopen(namefile);
myexit(1);
}
/* get the names in the file */
while (fscanf(names, "%s", path) == 1) {
if (*path == '-') { /* if an option */
i = path[1];
switch (i) {
case 'q': /* quick search */
invertedindex = YES;
break;
case 'T':
/* truncate symbols to 8 characters */
truncatesyms = YES;
break;
case 'I': /* #include file directory */
case 'p': /* file path components to */
/* display */
s = path + 2; /* for "-Ipath" */
if (*s == '\0') { /* if "-I path" */
(void) fscanf(names,
"%s", path);
s = path;
}
switch (i) {
case 'I': /* #include file directory */
if (firstbuild == YES) {
/* expand $ and ~ */
shellpath(dir,
sizeof (dir), s);
includedir(dir);
}
break;
case 'p':
/* file path components */
/* to display */
if (*s < '0' || *s > '9') {
(void) fprintf(stderr,
"cscope: -p option "
"in file %s: "
"missing or "
"invalid numeric "
"value\n",
namefile);
}
dispcomponents = atoi(s);
break;
}
break;
default:
(void) fprintf(stderr,
"cscope: only -I, -p, and -T "
"options can be in file %s\n",
namefile);
}
} else if (vpaccess(path, READ) == 0) {
addsrcfile(path);
} else {
(void) fprintf(stderr,
"cscope: cannot find file %s\n",
path);
errorsfound = YES;
}
}
(void) fclose(names);
firstbuild = NO;
return;
}
/* make a list of all the source files in the directories */
for (i = 0; i < nsrcdirs; ++i) {
s = srcdirs[i];
getsrcfiles(s, s);
if (*s != '/') { /* if it isn't a full path name */
/* compute its path from any higher view path nodes */
for (j = 1; j < vpndirs; ++j) {
(void) sprintf(dir, "%s/%s", vpdirs[j], s);
/* make sure it is a directory */
if (stat(compath(dir), &statstruct) == 0 &&
S_ISDIR(statstruct.st_mode)) {
getsrcfiles(dir, s);
}
}
}
}
}
int
main(int argc, char **argv)
{
int envc; /* environment argument count */
char **envv; /* environment argument list */
FILE *names; /* name file pointer */
int oldnum; /* number in old cross-ref */
char path[PATHLEN + 1]; /* file path */
FILE *oldrefs; /* old cross-reference file */
char *s;
int c, i;
pid_t pid;
/* save the command name for messages */
argv0 = basename(argv[0]);
/* get the current directory for build() and line-oriented P command */
if (mygetwd(currentdir) == NULL) {
(void) fprintf(stderr,
"cscope: warning: cannot get current directory name\n");
(void) strcpy(currentdir, "<unknown>");
}
/* initialize any view path; (saves time since currendir is known) */
vpinit(currentdir);
dbvpndirs = vpndirs; /* number of directories in database view path */
/* directories (including current) in database view path */
dbvpdirs = vpdirs;
/* the first source directory is the current directory */
sourcedir(".");
/* read the environment */
editor = mygetenv("EDITOR", EDITOR);
editor = mygetenv("VIEWER", editor); /* use viewer if set */
home = getenv("HOME");
shell = mygetenv("SHELL", SHELL);
tmpdir = mygetenv("TMPDIR", TMPDIR);
/* increment nesting depth */
cscopedepth = atoi(mygetenv("CSCOPEDEPTH", "0"));
(void) sprintf(path, "CSCOPEDEPTH=%d", ++cscopedepth);
(void) putenv(stralloc(path));
if ((s = getenv("CSCOPEOPTIONS")) != NULL) {
/* parse the environment option string */
envc = 1;
envv = mymalloc(sizeof (char *));
s = strtok(stralloc(s), OPTSEPS);
while (s != NULL) {
envv = myrealloc(envv, ++envc * sizeof (char *));
envv[envc - 1] = stralloc(s);
s = strtok((char *)NULL, OPTSEPS);
}
/* set the environment options */
options(envc, envv);
}
/* set the command line options */
options(argc, argv);
/* create the temporary file names */
pid = getpid();
(void) sprintf(temp1, "%s/cscope%d.1", tmpdir, (int)pid);
(void) sprintf(temp2, "%s/cscope%d.2", tmpdir, (int)pid);
/* if running in the foreground */
if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
/* cleanup on the interrupt and quit signals */
(void) signal(SIGINT, myexit);
(void) signal(SIGQUIT, myexit);
}
/* cleanup on the hangup signal */
(void) signal(SIGHUP, myexit);
/* if the database path is relative and it can't be created */
if (reffile[0] != '/' && access(".", WRITE) != 0) {
/* if the database may not be up-to-date or can't be read */
(void) sprintf(path, "%s/%s", home, reffile);
if (isuptodate == NO || access(reffile, READ) != 0) {
/* put it in the home directory */
reffile = stralloc(path);
(void) sprintf(path, "%s/%s", home, invname);
invname = stralloc(path);
(void) sprintf(path, "%s/%s", home, invpost);
invpost = stralloc(path);
(void) fprintf(stderr,
"cscope: symbol database will be %s\n", reffile);
}
}
/* if the cross-reference is to be considered up-to-date */
if (isuptodate == YES) {
if ((oldrefs = vpfopen(reffile, "r")) == NULL) {
cannotopen(reffile);
exit(1);
}
/*
* get the crossref file version but skip the current
* directory
*/
if (fscanf(oldrefs, "cscope %d %*s", &fileversion) != 1) {
(void) fprintf(stderr,
"cscope: cannot read file version from file %s\n",
reffile);
exit(1);
}
if (fileversion >= 8) {
/* override these command line options */
compress = YES;
invertedindex = NO;
/* see if there are options in the database */
for (;;) {
/* no -q leaves multiple blanks */
while ((c = getc(oldrefs)) == ' ') {
;
}
if (c != '-') {
(void) ungetc(c, oldrefs);
break;
}
switch (c = getc(oldrefs)) {
case 'c': /* ASCII characters only */
compress = NO;
break;
case 'q': /* quick search */
invertedindex = YES;
(void) fscanf(oldrefs,
"%ld", &totalterms);
break;
case 'T':
/* truncate symbols to 8 characters */
dbtruncated = YES;
truncatesyms = YES;
break;
}
}
initcompress();
/* seek to the trailer */
if (fscanf(oldrefs, "%ld", &traileroffset) != 1) {
(void) fprintf(stderr,
"cscope: cannot read trailer offset from "
"file %s\n", reffile);
exit(1);
}
if (fseek(oldrefs, traileroffset, 0) != 0) {
(void) fprintf(stderr,
"cscope: cannot seek to trailer in "
"file %s\n", reffile);
exit(1);
}
}
/*
* read the view path for use in converting relative paths to
* full paths
*
* note: don't overwrite vp[n]dirs because this can cause
* the wrong database index files to be found in the viewpath
*/
if (fileversion >= 13) {
if (fscanf(oldrefs, "%d", &dbvpndirs) != 1) {
(void) fprintf(stderr,
"cscope: cannot read view path size from "
"file %s\n", reffile);
exit(1);
}
if (dbvpndirs > 0) {
dbvpdirs = mymalloc(
dbvpndirs * sizeof (char *));
for (i = 0; i < dbvpndirs; ++i) {
if (fscanf(oldrefs, "%s", path) != 1) {
(void) fprintf(stderr,
"cscope: cannot read view "
"path from file %s\n",
reffile);
exit(1);
}
dbvpdirs[i] = stralloc(path);
}
}
}
/* skip the source and include directory lists */
skiplist(oldrefs);
skiplist(oldrefs);
/* get the number of source files */
if (fscanf(oldrefs, "%d", &nsrcfiles) != 1) {
(void) fprintf(stderr,
"cscope: cannot read source file size from "
"file %s\n", reffile);
exit(1);
}
/* get the source file list */
srcfiles = mymalloc(nsrcfiles * sizeof (char *));
if (fileversion >= 9) {
/* allocate the string space */
if (fscanf(oldrefs, "%d", &oldnum) != 1) {
(void) fprintf(stderr,
"cscope: cannot read string space size "
"from file %s\n", reffile);
exit(1);
}
s = mymalloc(oldnum);
(void) getc(oldrefs); /* skip the newline */
/* read the strings */
if (fread(s, oldnum, 1, oldrefs) != 1) {
(void) fprintf(stderr,
"cscope: cannot read source file names "
"from file %s\n", reffile);
exit(1);
}
/* change newlines to nulls */
for (i = 0; i < nsrcfiles; ++i) {
srcfiles[i] = s;
for (++s; *s != '\n'; ++s) {
;
}
*s = '\0';
++s;
}
/* if there is a file of source file names */
if (namefile != NULL &&
(names = vpfopen(namefile, "r")) != NULL ||
(names = vpfopen(NAMEFILE, "r")) != NULL) {
/* read any -p option from it */
while (fscanf(names, "%s", path) == 1 &&
*path == '-') {
i = path[1];
s = path + 2; /* for "-Ipath" */
if (*s == '\0') {
/* if "-I path" */
(void) fscanf(names,
"%s", path);
s = path;
}
switch (i) {
case 'p':
/* file path components */
/* to display */
if (*s < '0' || *s > '9') {
(void) fprintf(stderr,
"cscope: -p option "
"in file %s: "
"missing or "
"invalid numeric "
"value\n",
namefile);
}
dispcomponents = atoi(s);
}
}
(void) fclose(names);
}
} else {
for (i = 0; i < nsrcfiles; ++i) {
if (fscanf(oldrefs, "%s", path) != 1) {
(void) fprintf(stderr,
"cscope: cannot read source file "
"name from file %s\n", reffile);
exit(1);
}
srcfiles[i] = stralloc(path);
}
}
(void) fclose(oldrefs);
} else {
/* get source directories from the environment */
if ((s = getenv("SOURCEDIRS")) != NULL) {
sourcedir(s);
}
/* make the source file list */
srcfiles = mymalloc(msrcfiles * sizeof (char *));
makefilelist();
if (nsrcfiles == 0) {
(void) fprintf(stderr,
"cscope: no source files found\n");
printusage();
exit(1);
}
/* get include directories from the environment */
if ((s = getenv("INCLUDEDIRS")) != NULL) {
includedir(s);
}
/* add /usr/include to the #include directory list */
includedir("/usr/include");
/* initialize the C keyword table */
initsymtab();
/* create the file name(s) used for a new cross-reference */
(void) strcpy(path, reffile);
s = basename(path);
*s = '\0';
(void) strcat(path, "n");
++s;
(void) strcpy(s, basename(reffile));
newreffile = stralloc(path);
(void) strcpy(s, basename(invname));
newinvname = stralloc(path);
(void) strcpy(s, basename(invpost));
newinvpost = stralloc(path);
/* build the cross-reference */
initcompress();
build();
if (buildonly == YES) {
exit(0);
}
}
opendatabase();
/*
* removing a database will not release the disk space if a cscope
* process has the file open, so a project may want unattended cscope
* processes to exit overnight, including their subshells and editors
*/
if (noacttime) {
(void) signal(SIGALRM, timedout);
(void) alarm(noacttime);
}
/*
* if using the line oriented user interface so cscope can be a
* subprocess to emacs or samuel
*/
if (linemode == YES) {
if (*pattern != '\0') { /* do any optional search */
if (search() == YES) {
while ((c = getc(refsfound)) != EOF) {
(void) putchar(c);
}
}
}
if (onesearch == YES) {
myexit(0);
}
for (;;) {
char buf[PATLEN + 2];
if (noacttime) {
(void) alarm(noacttime);
}
(void) printf(">> ");
(void) fflush(stdout);
if (fgets(buf, sizeof (buf), stdin) == NULL) {
myexit(0);
}
/* remove any trailing newline character */
if (*(s = buf + strlen(buf) - 1) == '\n') {
*s = '\0';
}
switch (*buf) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': /* samuel only */
field = *buf - '0';
(void) strcpy(pattern, buf + 1);
(void) search();
(void) printf("cscope: %d lines\n", totallines);
while ((c = getc(refsfound)) != EOF) {
(void) putchar(c);
}
break;
case 'c': /* toggle caseless mode */
case ctrl('C'):
if (caseless == NO) {
caseless = YES;
} else {
caseless = NO;
}
egrepcaseless(caseless);
break;
case 'r': /* rebuild database cscope style */
case ctrl('R'):
freefilelist();
makefilelist();
/* FALLTHROUGH */
case 'R': /* rebuild database samuel style */
rebuild();
(void) putchar('\n');
break;
case 'C': /* clear file names */
freefilelist();
(void) putchar('\n');
break;
case 'F': /* add a file name */
(void) strcpy(path, buf + 1);
if (infilelist(path) == NO &&
vpaccess(path, READ) == 0) {
addsrcfile(path);
}
(void) putchar('\n');
break;
case 'P': /* print the path to the files */
if (prependpath != NULL) {
(void) puts(prependpath);
} else {
(void) puts(currentdir);
}
break;
case 'q': /* quit */
case ctrl('D'):
case ctrl('Z'):
myexit(0);
default:
(void) fprintf(stderr,
"cscope: unknown command '%s'\n", buf);
break;
}
}
/* NOTREACHED */
}
/* pause before clearing the screen if there have been error messages */
if (errorsfound == YES) {
errorsfound = NO;
askforreturn();
}
(void) signal(SIGINT, SIG_IGN); /* ignore interrupts */
(void) signal(SIGPIPE, SIG_IGN); /* | command can cause pipe signal */
/* initialize the curses display package */
(void) initscr(); /* initialize the screen */
setfield(); /* set the initial cursor position */
entercurses();
(void) keypad(stdscr, TRUE); /* enable the keypad */
dispinit(); /* initialize display parameters */
putmsg(""); /* clear any build progress message */
display(); /* display the version number and input fields */
/* do any optional search */
if (*pattern != '\0') {
atfield(); /* move to the input field */
(void) command(ctrl('A')); /* search */
display(); /* update the display */
} else if (reflines != NULL) {
/* read any symbol reference lines file */
(void) readrefs(reflines);
display(); /* update the display */
}
for (;;) {
if (noacttime) {
(void) alarm(noacttime);
}
atfield(); /* move to the input field */
/* exit if the quit command is entered */
if ((c = mygetch()) == EOF || c == ctrl('D') ||
c == ctrl('Z')) {
break;
}
/* execute the commmand, updating the display if necessary */
if (command(c) == YES) {
display();
}
}
/* cleanup and exit */
myexit(0);
/* NOTREACHED */
return (0);
}
