434 lines
9.1 KiB
C
434 lines
9.1 KiB
C
|
#include "EXTERN.h"
|
||
|
|
#include "common.h"
|
||
|
|
#include "INTERN.h"
|
||
|
|
#include "util.h"
|
||
|
|
#include "backupfile.h"
|
||
|
|
|
||
|
|
void my_exit();
|
||
|
|
|
||
|
|
#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(from,to)
|
||
|
|
char *from, *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, sizeof buf)) > 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(*s); s++) ;
|
||
|
|
if (*s)
|
||
|
|
*s = toupper(*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, sizeof buf)) > 0)
|
||
|
|
if (write(tofd, buf, i) != i)
|
||
|
|
pfatal1("write failed");
|
||
|
|
Close(fromfd);
|
||
|
|
Close(tofd);
|
||
|
|
}
|
||
|
|
Unlink(from);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Copy a file. */
|
||
|
|
|
||
|
|
void
|
||
|
|
copy_file(from,to)
|
||
|
|
char *from, *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, sizeof buf)) > 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(s)
|
||
|
|
Reg1 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. */
|
||
|
|
|
||
|
|
void
|
||
|
|
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, sizeof buf);
|
||
|
|
}
|
||
|
|
else if (isatty(1)) { /* this may be new file output */
|
||
|
|
Fflush(stdout);
|
||
|
|
write(1, buf, strlen(buf));
|
||
|
|
r = read(1, buf, sizeof buf);
|
||
|
|
}
|
||
|
|
else if ((ttyfd = open("/dev/tty", 2)) >= 0 && isatty(ttyfd)) {
|
||
|
|
/* might be deleted or unwriteable */
|
||
|
|
write(ttyfd, buf, strlen(buf));
|
||
|
|
r = read(ttyfd, buf, sizeof buf);
|
||
|
|
Close(ttyfd);
|
||
|
|
}
|
||
|
|
else if (isatty(0)) { /* this is probably patch input */
|
||
|
|
Fflush(stdin);
|
||
|
|
write(0, buf, strlen(buf));
|
||
|
|
r = read(0, buf, sizeof buf);
|
||
|
|
}
|
||
|
|
else { /* no terminal at all--default it */
|
||
|
|
buf[0] = '\n';
|
||
|
|
r = 1;
|
||
|
|
}
|
||
|
|
if (r <= 0)
|
||
|
|
buf[0] = 0;
|
||
|
|
else
|
||
|
|
buf[r] = '\0';
|
||
|
|
if (!tty2)
|
||
|
|
say1(buf);
|
||
|
|
}
|
||
|
|
#endif /* lint */
|
||
|
|
|
||
|
|
/* How to handle certain events when not in a critical region. */
|
||
|
|
|
||
|
|
void
|
||
|
|
set_signals(reset)
|
||
|
|
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()
|
||
|
|
{
|
||
|
|
#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(at,strip_leading,assume_exists)
|
||
|
|
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(*at))
|
||
|
|
at++;
|
||
|
|
#ifdef DEBUGGING
|
||
|
|
if (debug & 128)
|
||
|
|
say4("fetchname %s %d %d\n",at,strip_leading,assume_exists);
|
||
|
|
#endif
|
||
|
|
if (strnEQ(at, "/dev/null", 9)) /* so files can be created by diffing */
|
||
|
|
return Nullch; /* against /dev/null. */
|
||
|
|
name = fullname = t = savestr(at);
|
||
|
|
|
||
|
|
/* Strip off up to `sleading' leading slashes and null terminate. */
|
||
|
|
for (; *t && !isspace(*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" , filebase, 0)
|
||
|
|
|| 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 (size)
|
||
|
|
unsigned size;
|
||
|
|
{
|
||
|
|
register char *p = (char *) malloc (size);
|
||
|
|
if (!p)
|
||
|
|
fatal("out of memory");
|
||
|
|
return p;
|
||
|
|
}
|