mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-12-03 01:52:45 +00:00
9ab20e104c
to a dynamically allocated one in order to support input lines of arbitrary length. Approved by: kan (mentor) MFC after: 1 month
459 lines
9.1 KiB
C
459 lines
9.1 KiB
C
/* $FreeBSD$ */
|
|
|
|
#include <paths.h>
|
|
|
|
#include "EXTERN.h"
|
|
#include "common.h"
|
|
#include "INTERN.h"
|
|
#include "util.h"
|
|
#include "backupfile.h"
|
|
|
|
void my_exit(int _status); /* in patch.c */
|
|
|
|
#ifndef HAVE_STRERROR
|
|
static char *
|
|
private_strerror (errnum)
|
|
int errnum;
|
|
{
|
|
extern char *sys_errlist[];
|
|
extern int sys_nerr;
|
|
|
|
if (errnum > 0 && errnum <= sys_nerr)
|
|
return sys_errlist[errnum];
|
|
return "Unknown system error";
|
|
}
|
|
#define strerror private_strerror
|
|
#endif /* !HAVE_STRERROR */
|
|
|
|
/*
|
|
* Rename a file, copying it if necessary.
|
|
*/
|
|
int
|
|
move_file(char *from, char *to)
|
|
{
|
|
char bakname[512];
|
|
Reg1 char *s;
|
|
Reg2 int i;
|
|
Reg3 int fromfd;
|
|
|
|
/* to stdout? */
|
|
|
|
if (strEQ(to, "-")) {
|
|
#ifdef DEBUGGING
|
|
if (debug & 4)
|
|
say2("Moving %s to stdout.\n", from);
|
|
#endif
|
|
fromfd = open(from, 0);
|
|
if (fromfd < 0)
|
|
pfatal2("internal error, can't reopen %s", from);
|
|
while ((i = read(fromfd, buf, buf_size)) > 0)
|
|
if (write(1, buf, i) != 1)
|
|
pfatal1("write failed");
|
|
Close(fromfd);
|
|
return 0;
|
|
}
|
|
|
|
if (origprae) {
|
|
Strcpy(bakname, origprae);
|
|
Strcat(bakname, to);
|
|
} else {
|
|
#ifndef NODIR
|
|
char *backupname = find_backup_file_name(to);
|
|
if (backupname == (char *) 0)
|
|
fatal1("out of memory\n");
|
|
Strcpy(bakname, backupname);
|
|
free(backupname);
|
|
#else /* NODIR */
|
|
Strcpy(bakname, to);
|
|
Strcat(bakname, simple_backup_suffix);
|
|
#endif /* NODIR */
|
|
}
|
|
|
|
if (stat(to, &filestat) == 0) { /* output file exists */
|
|
dev_t to_device = filestat.st_dev;
|
|
ino_t to_inode = filestat.st_ino;
|
|
char *simplename = bakname;
|
|
|
|
for (s = bakname; *s; s++) {
|
|
if (*s == '/')
|
|
simplename = s + 1;
|
|
}
|
|
/*
|
|
* Find a backup name that is not the same file.
|
|
* Change the first lowercase char into uppercase;
|
|
* if that isn't sufficient, chop off the first char
|
|
* and try again.
|
|
*/
|
|
while (stat(bakname, &filestat) == 0 &&
|
|
to_device == filestat.st_dev &&
|
|
to_inode == filestat.st_ino) {
|
|
/* Skip initial non-lowercase chars. */
|
|
for (s=simplename; *s && !islower((unsigned char)*s);
|
|
s++)
|
|
;
|
|
if (*s)
|
|
*s = toupper((unsigned char)*s);
|
|
else
|
|
Strcpy(simplename, simplename + 1);
|
|
}
|
|
while (unlink(bakname) >= 0)
|
|
; /* while() is for benefit of Eunice */
|
|
#ifdef DEBUGGING
|
|
if (debug & 4)
|
|
say3("Moving %s to %s.\n", to, bakname);
|
|
#endif
|
|
if (rename(to, bakname) < 0) {
|
|
say4("Can't backup %s, output is in %s: %s\n", to, from,
|
|
strerror(errno));
|
|
return -1;
|
|
}
|
|
while (unlink(to) >= 0)
|
|
;
|
|
}
|
|
#ifdef DEBUGGING
|
|
if (debug & 4)
|
|
say3("Moving %s to %s.\n", from, to);
|
|
#endif
|
|
if (rename(from, to) < 0) { /* different file system? */
|
|
Reg4 int tofd;
|
|
|
|
tofd = creat(to, 0666);
|
|
if (tofd < 0) {
|
|
say4("Can't create %s, output is in %s: %s\n",
|
|
to, from, strerror(errno));
|
|
return -1;
|
|
}
|
|
fromfd = open(from, 0);
|
|
if (fromfd < 0)
|
|
pfatal2("internal error, can't reopen %s", from);
|
|
while ((i = read(fromfd, buf, buf_size)) > 0)
|
|
if (write(tofd, buf, i) != i)
|
|
pfatal1("write failed");
|
|
Close(fromfd);
|
|
Close(tofd);
|
|
}
|
|
Unlink(from);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Copy a file.
|
|
*/
|
|
void
|
|
copy_file(char *from, char *to)
|
|
{
|
|
Reg3 int tofd;
|
|
Reg2 int fromfd;
|
|
Reg1 int i;
|
|
|
|
tofd = creat(to, 0666);
|
|
if (tofd < 0)
|
|
pfatal2("can't create %s", to);
|
|
fromfd = open(from, 0);
|
|
if (fromfd < 0)
|
|
pfatal2("internal error, can't reopen %s", from);
|
|
while ((i = read(fromfd, buf, buf_size)) > 0)
|
|
if (write(tofd, buf, i) != i)
|
|
pfatal2("write to %s failed", to);
|
|
Close(fromfd);
|
|
Close(tofd);
|
|
}
|
|
|
|
/*
|
|
* Allocate a unique area for a string.
|
|
*/
|
|
char *
|
|
savestr(char *s)
|
|
{
|
|
Reg3 char *rv;
|
|
Reg2 char *t;
|
|
|
|
if (!s)
|
|
s = "Oops";
|
|
t = s;
|
|
while (*t++)
|
|
;
|
|
rv = malloc((MEM) (t - s));
|
|
if (rv == Nullch) {
|
|
if (using_plan_a)
|
|
out_of_mem = TRUE;
|
|
else
|
|
fatal1("out of memory\n");
|
|
} else {
|
|
t = rv;
|
|
while ((*t++ = *s++));
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
#if defined(lint) && defined(CANVARARG)
|
|
|
|
/*VARARGS ARGSUSED*/
|
|
say(pat) char *pat; { ; }
|
|
/*VARARGS ARGSUSED*/
|
|
fatal(pat) char *pat; { ; }
|
|
/*VARARGS ARGSUSED*/
|
|
pfatal(pat) char *pat; { ; }
|
|
/*VARARGS ARGSUSED*/
|
|
ask(pat) char *pat; { ; }
|
|
|
|
#else
|
|
|
|
/*
|
|
* Vanilla terminal output (buffered).
|
|
*/
|
|
void
|
|
say(pat,arg1,arg2,arg3)
|
|
char *pat;
|
|
long arg1,arg2,arg3;
|
|
{
|
|
fprintf(stderr, pat, arg1, arg2, arg3);
|
|
Fflush(stderr);
|
|
}
|
|
|
|
/*
|
|
* Terminal output, pun intended.
|
|
*/
|
|
void /* very void */
|
|
fatal(pat,arg1,arg2,arg3)
|
|
char *pat;
|
|
long arg1,arg2,arg3;
|
|
{
|
|
fprintf(stderr, "patch: **** ");
|
|
fprintf(stderr, pat, arg1, arg2, arg3);
|
|
my_exit(1);
|
|
}
|
|
|
|
/*
|
|
* Say something from patch, something from the system, then silence...
|
|
*/
|
|
void /* very void */
|
|
pfatal(pat,arg1,arg2,arg3)
|
|
char *pat;
|
|
long arg1,arg2,arg3;
|
|
{
|
|
int errnum = errno;
|
|
|
|
fprintf(stderr, "patch: **** ");
|
|
fprintf(stderr, pat, arg1, arg2, arg3);
|
|
fprintf(stderr, ": %s\n", strerror(errnum));
|
|
my_exit(1);
|
|
}
|
|
|
|
/*
|
|
* Get a response from the user, somehow or other.
|
|
*/
|
|
int
|
|
ask(pat,arg1,arg2,arg3)
|
|
char *pat;
|
|
long arg1,arg2,arg3;
|
|
{
|
|
int ttyfd;
|
|
int r;
|
|
bool tty2 = isatty(2);
|
|
|
|
Sprintf(buf, pat, arg1, arg2, arg3);
|
|
Fflush(stderr);
|
|
write(2, buf, strlen(buf));
|
|
if (tty2) { /* might be redirected to a file */
|
|
r = read(2, buf, buf_size);
|
|
} else if (isatty(1)) { /* this may be new file output */
|
|
Fflush(stdout);
|
|
write(1, buf, strlen(buf));
|
|
r = read(1, buf, buf_size);
|
|
} else if ((ttyfd = open(_PATH_TTY, 2)) >= 0 && isatty(ttyfd)) {
|
|
/* might be deleted or unwriteable */
|
|
write(ttyfd, buf, strlen(buf));
|
|
r = read(ttyfd, buf, buf_size);
|
|
Close(ttyfd);
|
|
} else if (isatty(0)) { /* this is probably patch input */
|
|
Fflush(stdin);
|
|
write(0, buf, strlen(buf));
|
|
r = read(0, buf, buf_size);
|
|
} else { /* no terminal at all--default it */
|
|
buf[0] = '\n';
|
|
buf[1] = 0;
|
|
say1(buf);
|
|
return 0; /* signal possible error */
|
|
}
|
|
if (r <= 0)
|
|
buf[0] = 0;
|
|
else
|
|
buf[r] = '\0';
|
|
if (!tty2)
|
|
say1(buf);
|
|
|
|
if (r <= 0)
|
|
return 0; /* if there was an error, return it */
|
|
else
|
|
return 1;
|
|
}
|
|
#endif /* lint */
|
|
|
|
/*
|
|
* How to handle certain events when not in a critical region.
|
|
*/
|
|
void
|
|
set_signals(int reset)
|
|
{
|
|
#ifndef lint
|
|
static RETSIGTYPE (*hupval)(),(*intval)();
|
|
|
|
if (!reset) {
|
|
hupval = signal(SIGHUP, SIG_IGN);
|
|
if (hupval != SIG_IGN)
|
|
hupval = (RETSIGTYPE(*)())my_exit;
|
|
intval = signal(SIGINT, SIG_IGN);
|
|
if (intval != SIG_IGN)
|
|
intval = (RETSIGTYPE(*)())my_exit;
|
|
}
|
|
Signal(SIGHUP, hupval);
|
|
Signal(SIGINT, intval);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* How to handle certain events when in a critical region.
|
|
*/
|
|
void
|
|
ignore_signals(void)
|
|
{
|
|
#ifndef lint
|
|
Signal(SIGHUP, SIG_IGN);
|
|
Signal(SIGINT, SIG_IGN);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Make sure we'll have the directories to create a file.
|
|
* If `striplast' is TRUE, ignore the last element of `filename'.
|
|
*/
|
|
void
|
|
makedirs(filename,striplast)
|
|
Reg1 char *filename;
|
|
bool striplast;
|
|
{
|
|
char tmpbuf[256];
|
|
Reg2 char *s = tmpbuf;
|
|
char *dirv[20]; /* Point to the NULs between elements. */
|
|
Reg3 int i;
|
|
Reg4 int dirvp = 0; /* Number of finished entries in dirv. */
|
|
|
|
/*
|
|
* Copy `filename' into `tmpbuf' with a NUL instead of a slash
|
|
* between the directories.
|
|
*/
|
|
while (*filename) {
|
|
if (*filename == '/') {
|
|
filename++;
|
|
dirv[dirvp++] = s;
|
|
*s++ = '\0';
|
|
} else {
|
|
*s++ = *filename++;
|
|
}
|
|
}
|
|
*s = '\0';
|
|
dirv[dirvp] = s;
|
|
if (striplast)
|
|
dirvp--;
|
|
if (dirvp < 0)
|
|
return;
|
|
|
|
strcpy(buf, "mkdir");
|
|
s = buf;
|
|
for (i = 0; i <= dirvp; i++) {
|
|
struct stat sbuf;
|
|
|
|
if (stat(tmpbuf, &sbuf) && errno == ENOENT) {
|
|
while (*s)
|
|
s++;
|
|
*s++ = ' ';
|
|
strcpy(s, tmpbuf);
|
|
}
|
|
*dirv[i] = '/';
|
|
}
|
|
if (s != buf)
|
|
system(buf);
|
|
}
|
|
|
|
/*
|
|
* Make filenames more reasonable.
|
|
*/
|
|
char *
|
|
fetchname(char *at, int strip_leading, int assume_exists)
|
|
{
|
|
char *fullname;
|
|
char *name;
|
|
Reg1 char *t;
|
|
char tmpbuf[200];
|
|
int sleading = strip_leading;
|
|
|
|
if (!at)
|
|
return Nullch;
|
|
while (isspace((unsigned char)*at))
|
|
at++;
|
|
#ifdef DEBUGGING
|
|
if (debug & 128)
|
|
say4("fetchname %s %d %d\n",at,strip_leading,assume_exists);
|
|
#endif
|
|
if (strnEQ(at, _PATH_DEVNULL, sizeof _PATH_DEVNULL - 1))
|
|
/* So files can be created by diffing against /dev/null. */
|
|
return Nullch;
|
|
name = fullname = t = savestr(at);
|
|
|
|
/* Strip off up to `sleading' leading slashes and null terminate. */
|
|
for (; *t && !isspace((unsigned char)*t); t++)
|
|
if (*t == '/')
|
|
if (--sleading >= 0)
|
|
name = t + 1;
|
|
*t = '\0';
|
|
|
|
/*
|
|
* If no -p option was given (957 is the default value!),
|
|
* we were given a relative pathname,
|
|
* and the leading directories that we just stripped off all exist,
|
|
* put them back on.
|
|
*/
|
|
if (strip_leading == 957 && name != fullname && *fullname != '/') {
|
|
name[-1] = '\0';
|
|
if (stat(fullname, &filestat) == 0 &&
|
|
S_ISDIR(filestat.st_mode)) {
|
|
name[-1] = '/';
|
|
name = fullname;
|
|
}
|
|
}
|
|
|
|
name = savestr(name);
|
|
free(fullname);
|
|
|
|
if (stat(name, &filestat) && !assume_exists) {
|
|
char *filebase = basename(name);
|
|
int pathlen = filebase - name;
|
|
|
|
/* Put any leading path into `tmpbuf'. */
|
|
strncpy(tmpbuf, name, pathlen);
|
|
|
|
#define try(f, a1, a2) \
|
|
(Sprintf(tmpbuf + pathlen, f, a1, a2), stat(tmpbuf, &filestat) == 0)
|
|
if (try("RCS/%s%s", filebase, RCSSUFFIX) ||
|
|
try("RCS/%s%s", filebase, "") ||
|
|
try( "%s%s", filebase, RCSSUFFIX) ||
|
|
try("SCCS/%s%s", SCCSPREFIX, filebase) ||
|
|
try( "%s%s", SCCSPREFIX, filebase))
|
|
return name;
|
|
free(name);
|
|
name = Nullch;
|
|
}
|
|
|
|
return name;
|
|
}
|
|
|
|
char *
|
|
xmalloc(unsigned int size)
|
|
{
|
|
register char *p = (char *) malloc (size);
|
|
if (!p)
|
|
fatal("out of memory");
|
|
return p;
|
|
}
|