/*
* Open the patch file at the beginning of time.
*/
void
open_patch_file(const char *filename)
{
struct stat filestat;
int nr, nw;
if (filename == NULL || *filename == '\0' || strEQ(filename, "-")) {
pfp = fopen(TMPPATNAME, "w");
if (pfp == NULL)
pfatal("can't create %s", TMPPATNAME);
while ((nr = fread(buf, 1, buf_size, stdin)) > 0) {
nw = fwrite(buf, 1, nr, pfp);
if (nr != nw)
pfatal("write error to %s", TMPPATNAME);
}
if (ferror(pfp) || fclose(pfp))
pfatal("can't write %s", TMPPATNAME);
filename = TMPPATNAME;
}
pfp = fopen(filename, "r");
if (pfp == NULL)
pfatal("patch file %s not found", filename);
fstat(fileno(pfp), &filestat);
p_filesize = filestat.st_size;
next_intuit_at(0L, 1L); /* start at the beginning */
set_hunkmax();
}
/*
* Open the patch file at the beginning of time.
*/
void
open_patch_file(const char *filename)
{
struct stat filestat;
if (filename == NULL || *filename == '\0' || strEQ(filename, "-")) {
pfp = fopen(TMPPATNAME, "w");
if (pfp == NULL)
pfatal("can't create %s", TMPPATNAME);
while (fgets(buf, sizeof buf, stdin) != NULL)
fputs(buf, pfp);
fclose(pfp);
filename = TMPPATNAME;
}
pfp = fopen(filename, "r");
if (pfp == NULL)
pfatal("patch file %s not found", filename);
fstat(fileno(pfp), &filestat);
p_filesize = filestat.st_size;
next_intuit_at(0L, 1L); /* start at the beginning */
set_hunkmax();
}
/*
* Reverse the old and new portions of the current hunk.
*/
bool
pch_swap(void)
{
char **tp_line; /* the text of the hunk */
short *tp_len; /* length of each line */
char *tp_char; /* +, -, and ! */
LINENUM i;
LINENUM n;
bool blankline = false;
char *s;
i = p_first;
p_first = p_newfirst;
p_newfirst = i;
/* make a scratch copy */
tp_line = p_line;
tp_len = p_len;
tp_char = p_char;
p_line = NULL; /* force set_hunkmax to allocate again */
p_len = NULL;
p_char = NULL;
set_hunkmax();
if (p_line == NULL || p_len == NULL || p_char == NULL) {
free(p_line);
p_line = tp_line;
free(p_len);
p_len = tp_len;
free(p_char);
p_char = tp_char;
return false; /* not enough memory to swap hunk! */
}
/* now turn the new into the old */
i = p_ptrn_lines + 1;
if (tp_char[i] == '\n') { /* account for possible blank line */
blankline = true;
i++;
}
if (p_efake >= 0) { /* fix non-freeable ptr range */
if (p_efake <= i)
n = p_end - i + 1;
else
n = -i;
p_efake += n;
p_bfake += n;
}
for (n = 0; i <= p_end; i++, n++) {
p_line[n] = tp_line[i];
p_char[n] = tp_char[i];
if (p_char[n] == '+')
p_char[n] = '-';
p_len[n] = tp_len[i];
}
if (blankline) {
i = p_ptrn_lines + 1;
p_line[n] = tp_line[i];
p_char[n] = tp_char[i];
p_len[n] = tp_len[i];
n++;
}
if (p_char[0] != '=')
fatal("Malformed patch at line %ld: expected '=' found '%c'\n",
p_input_line, p_char[0]);
p_char[0] = '*';
for (s = p_line[0]; *s; s++)
if (*s == '-')
*s = '*';
/* now turn the old into the new */
if (p_char[0] != '*')
fatal("Malformed patch at line %ld: expected '*' found '%c'\n",
p_input_line, p_char[0]);
tp_char[0] = '=';
for (s = tp_line[0]; *s; s++)
if (*s == '*')
*s = '-';
for (i = 0; n <= p_end; i++, n++) {
p_line[n] = tp_line[i];
p_char[n] = tp_char[i];
if (p_char[n] == '-')
p_char[n] = '+';
p_len[n] = tp_len[i];
}
if (i != p_ptrn_lines + 1)
fatal("Malformed patch at line %ld: expected %ld lines, "
"got %ld\n",
p_input_line, p_ptrn_lines + 1, i);
i = p_ptrn_lines;
p_ptrn_lines = p_repl_lines;
p_repl_lines = i;
free(tp_line);
free(tp_len);
free(tp_char);
return true;
}
static bool
plan_a(const char *filename)
{
int ifd, statfailed;
char *p, *s, lbuf[MAXLINELEN];
struct stat filestat;
off_t i;
ptrdiff_t sz;
size_t iline, lines_allocated;
#ifdef DEBUGGING
if (debug & 8)
return false;
#endif
if (filename == NULL || *filename == '\0')
return false;
statfailed = stat(filename, &filestat);
if (statfailed && ok_to_create_file) {
if (verbose)
say("(Creating file %s...)\n", filename);
/*
* in check_patch case, we still display `Creating file' even
* though we're not. The rule is that -C should be as similar
* to normal patch behavior as possible
*/
if (check_only)
return true;
makedirs(filename, true);
close(creat(filename, 0666));
statfailed = stat(filename, &filestat);
}
if (statfailed && check_only)
fatal("%s not found, -C mode, can't probe further\n", filename);
/* For nonexistent or read-only files, look for RCS or SCCS versions. */
if (statfailed ||
/* 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 != getuid())) {
const char *cs = NULL, *filebase, *filedir;
struct stat cstat;
char *tmp_filename1, *tmp_filename2;
tmp_filename1 = strdup(filename);
tmp_filename2 = strdup(filename);
if (tmp_filename1 == NULL || tmp_filename2 == NULL)
fatal("strdupping filename");
filebase = basename(tmp_filename1);
filedir = dirname(tmp_filename2);
/* Leave room in lbuf for the diff command. */
s = lbuf + 20;
#define try(f, a1, a2, a3) \
(snprintf(s, sizeof lbuf - 20, f, a1, a2, a3), stat(s, &cstat) == 0)
if (try("%s/RCS/%s%s", filedir, filebase, RCSSUFFIX) ||
try("%s/RCS/%s%s", filedir, filebase, "") ||
try("%s/%s%s", filedir, filebase, RCSSUFFIX)) {
snprintf(buf, buf_len, CHECKOUT, filename);
snprintf(lbuf, sizeof lbuf, RCSDIFF, filename);
cs = "RCS";
} else if (try("%s/SCCS/%s%s", filedir, SCCSPREFIX, filebase) ||
try("%s/%s%s", filedir, SCCSPREFIX, filebase)) {
snprintf(buf, buf_len, GET, s);
snprintf(lbuf, sizeof lbuf, SCCSDIFF, s, filename);
cs = "SCCS";
} else if (statfailed)
fatal("can't find %s\n", filename);
free(tmp_filename1);
free(tmp_filename2);
/*
* 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. */
fatal("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)
say("Comparing file %s to default "
"%s version...\n",
filename, cs);
if (system(lbuf))
fatal("can't check out file %s: "
"differs from default %s version\n",
filename, cs);
}
if (verbose)
say("Checking out file %s from %s...\n",
filename, cs);
if (system(buf) || stat(filename, &filestat))
fatal("can't check out file %s from %s\n",
filename, cs);
}
}
filemode = filestat.st_mode;
if (!S_ISREG(filemode))
fatal("%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 */
}
if ((uintmax_t)i_size > (uintmax_t)SIZE_MAX) {
say("block too large to mmap\n");
return false;
}
if ((ifd = open(filename, O_RDONLY)) < 0)
pfatal("can't open file %s", filename);
if (i_size) {
i_womp = mmap(NULL, i_size, PROT_READ, MAP_PRIVATE, ifd, 0);
if (i_womp == MAP_FAILED) {
perror("mmap failed");
i_womp = NULL;
close(ifd);
return false;
}
} else {
i_womp = NULL;
}
close(ifd);
#if !defined(__minix)
if (i_size)
madvise(i_womp, i_size, MADV_SEQUENTIAL);
#endif /* !defined(__minix) */
/* estimate the number of lines */
lines_allocated = i_size / 25;
if (lines_allocated < 100)
lines_allocated = 100;
if (!reallocate_lines(&lines_allocated))
return false;
/* now scan the buffer and build pointer array */
iline = 1;
i_ptr[iline] = i_womp;
/* test for NUL too, to maintain the behavior of the original code */
for (s = i_womp, i = 0; i < i_size && *s != '\0'; s++, i++) {
if (*s == '\n') {
if (iline == lines_allocated) {
if (!reallocate_lines(&lines_allocated))
return false;
}
/* these are NOT NUL terminated */
i_ptr[++iline] = s + 1;
}
}
/* if the last line contains no EOL, append one */
if (i_size > 0 && i_womp[i_size - 1] != '\n') {
last_line_missing_eol = true;
/* fix last line */
sz = s - i_ptr[iline];
p = malloc(sz + 1);
if (p == NULL) {
free(i_ptr);
i_ptr = NULL;
munmap(i_womp, i_size);
i_womp = NULL;
return false;
}
memcpy(p, i_ptr[iline], sz);
p[sz] = '\n';
i_ptr[iline] = p;
/* count the extra line and make it point to some valid mem */
i_ptr[++iline] = empty_line;
} else
last_line_missing_eol = false;
input_lines = iline - 1;
/* now check for revision, if any */
if (revision != NULL) {
if (!rev_in_string(i_womp)) {
if (force) {
if (verbose)
say("Warning: this file doesn't appear "
"to be the %s version--patching anyway.\n",
revision);
} else if (batch) {
fatal("this file doesn't appear to be the "
"%s version--aborting.\n",
revision);
} else {
ask("This file doesn't appear to be the "
"%s version--patch anyway? [n] ",
revision);
if (*buf != 'y')
fatal("aborted\n");
}
} else if (verbose)
say("Good. This file appears to be the %s version.\n",
revision);
}
return true; /* plan a will work */
}
/* Keep (virtually) nothing in memory. */
static void
plan_b(const char *filename)
{
FILE *ifp;
size_t i = 0, j, maxlen = 1;
char *p;
bool found_revision = (revision == NULL);
using_plan_a = false;
if ((ifp = fopen(filename, "r")) == NULL)
pfatal("can't open file %s", filename);
unlink(TMPINNAME);
if ((tifd = open(TMPINNAME, O_EXCL | O_CREAT | O_WRONLY, 0666)) < 0)
pfatal("can't open file %s", TMPINNAME);
while (fgets(buf, buf_len, ifp) != NULL) {
if (revision != NULL && !found_revision && rev_in_string(buf))
found_revision = true;
if ((i = strlen(buf)) > maxlen)
maxlen = i; /* find longest line */
}
last_line_missing_eol = i > 0 && buf[i - 1] != '\n';
if (last_line_missing_eol && maxlen == i)
maxlen++;
if (revision != NULL) {
if (!found_revision) {
if (force) {
if (verbose)
say("Warning: this file doesn't appear "
"to be the %s version--patching anyway.\n",
revision);
} else if (batch) {
fatal("this file doesn't appear to be the "
"%s version--aborting.\n",
revision);
} else {
ask("This file doesn't appear to be the %s "
"version--patch anyway? [n] ",
revision);
if (*buf != 'y')
fatal("aborted\n");
}
} else if (verbose)
say("Good. This file appears to be the %s version.\n",
revision);
}
fseek(ifp, 0L, SEEK_SET); /* rewind file */
lines_per_buf = BUFFERSIZE / maxlen;
tireclen = maxlen;
tibuf[0] = malloc(BUFFERSIZE + 1);
if (tibuf[0] == NULL)
fatal("out of memory\n");
tibuf[1] = malloc(BUFFERSIZE + 1);
if (tibuf[1] == NULL)
fatal("out of memory\n");
for (i = 1;; i++) {
p = tibuf[0] + maxlen * (i % lines_per_buf);
if (i % lines_per_buf == 0) /* new block */
if (write(tifd, tibuf[0], BUFFERSIZE) < BUFFERSIZE)
pfatal("can't write temp file");
if (fgets(p, maxlen + 1, ifp) == NULL) {
input_lines = i - 1;
if (i % lines_per_buf != 0)
if (write(tifd, tibuf[0], BUFFERSIZE) < BUFFERSIZE)
pfatal("can't write temp file");
break;
}
j = strlen(p);
/* These are '\n' terminated strings, so no need to add a NUL */
if (j == 0 || p[j - 1] != '\n')
p[j] = '\n';
}
fclose(ifp);
close(tifd);
if ((tifd = open(TMPINNAME, O_RDONLY)) < 0)
pfatal("can't reopen file %s", TMPINNAME);
}
/*
* Fetch a line from the input file, \n terminated, not necessarily \0.
*/
char *
ifetch(LINENUM line, int whichbuf)
{
if (line < 1 || line > input_lines) {
if (warn_on_invalid_line) {
say("No such line %ld in input file, ignoring\n", line);
warn_on_invalid_line = false;
}
return NULL;
}
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;
if (lseek(tifd, (off_t) (baseline / lines_per_buf *
BUFFERSIZE), SEEK_SET) < 0)
pfatal("cannot seek in the temporary input file");
if (read(tifd, tibuf[whichbuf], BUFFERSIZE) < 0)
pfatal("error reading tmp file %s", TMPINNAME);
}
return tibuf[whichbuf] + (tireclen * offline);
}
}
/*
* True if the string argument contains the revision number we want.
*/
static bool
rev_in_string(const char *string)
{
const char *s;
size_t patlen;
if (revision == NULL)
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;
}
static bool
plan_a(const char *filename)
{
int ifd, statfailed;
char *p, *s;
struct stat filestat;
ptrdiff_t sz;
size_t i;
size_t iline, lines_allocated;
#ifdef DEBUGGING
if (debug & 8)
return false;
#endif
if (filename == NULL || *filename == '\0')
return false;
statfailed = stat(filename, &filestat);
if (statfailed && ok_to_create_file) {
if (verbose)
say("(Creating file %s...)\n", filename);
/*
* in check_patch case, we still display `Creating file' even
* though we're not. The rule is that -C should be as similar
* to normal patch behavior as possible
*/
if (check_only)
return true;
makedirs(filename, true);
close(creat(filename, 0666));
statfailed = stat(filename, &filestat);
}
if (statfailed)
fatal("can't find %s\n", filename);
filemode = filestat.st_mode;
if (!S_ISREG(filemode))
fatal("%s is not a normal file--can't patch\n", filename);
if ((uint64_t)filestat.st_size > SIZE_MAX) {
say("block too large to mmap\n");
return false;
}
i_size = (size_t)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 */
}
if ((ifd = open(filename, O_RDONLY)) < 0)
pfatal("can't open file %s", filename);
if (i_size) {
i_womp = mmap(NULL, i_size, PROT_READ, MAP_PRIVATE, ifd, 0);
if (i_womp == MAP_FAILED) {
perror("mmap failed");
i_womp = NULL;
close(ifd);
return false;
}
} else {
i_womp = NULL;
}
close(ifd);
if (i_size)
madvise(i_womp, i_size, MADV_SEQUENTIAL);
/* estimate the number of lines */
lines_allocated = i_size / 25;
if (lines_allocated < 100)
lines_allocated = 100;
if (!reallocate_lines(&lines_allocated))
return false;
/* now scan the buffer and build pointer array */
iline = 1;
i_ptr[iline] = i_womp;
/* test for NUL too, to maintain the behavior of the original code */
for (s = i_womp, i = 0; i < i_size && *s != '\0'; s++, i++) {
if (*s == '\n') {
if (iline == lines_allocated) {
if (!reallocate_lines(&lines_allocated))
return false;
}
/* these are NOT NUL terminated */
i_ptr[++iline] = s + 1;
}
}
/* if the last line contains no EOL, append one */
if (i_size > 0 && i_womp[i_size - 1] != '\n') {
last_line_missing_eol = true;
/* fix last line */
sz = s - i_ptr[iline];
p = malloc(sz + 1);
if (p == NULL) {
free(i_ptr);
i_ptr = NULL;
munmap(i_womp, i_size);
i_womp = NULL;
return false;
}
memcpy(p, i_ptr[iline], sz);
p[sz] = '\n';
i_ptr[iline] = p;
/* count the extra line and make it point to some valid mem */
i_ptr[++iline] = empty_line;
} else
last_line_missing_eol = false;
input_lines = iline - 1;
/* now check for revision, if any */
if (revision != NULL) {
if (i_womp == NULL || !rev_in_string(i_womp)) {
if (force) {
if (verbose)
say("Warning: this file doesn't appear "
"to be the %s version--patching anyway.\n",
revision);
} else if (batch) {
fatal("this file doesn't appear to be the "
"%s version--aborting.\n",
revision);
} else {
ask("This file doesn't appear to be the "
"%s version--patch anyway? [n] ",
revision);
if (*buf != 'y')
fatal("aborted\n");
}
} else if (verbose)
say("Good. This file appears to be the %s version.\n",
revision);
}
return true; /* plan a will work */
}