340 lines
6.7 KiB
C
340 lines
6.7 KiB
C
#include "EXTERN.h"
|
|
#include "common.h"
|
|
#include "INTERN.h"
|
|
#include "util.h"
|
|
|
|
/* 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)
|
|
fatal2("patch: internal error, can't reopen %s\n", from);
|
|
while ((i=read(fromfd, buf, sizeof buf)) > 0)
|
|
if (write(1, buf, i) != 1)
|
|
fatal1("patch: write failed\n");
|
|
Close(fromfd);
|
|
return 0;
|
|
}
|
|
|
|
Strcpy(bakname, to);
|
|
Strcat(bakname, origext?origext:ORIGEXT);
|
|
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 */
|
|
while (stat(bakname, &filestat) >= 0 &&
|
|
to_device == filestat.st_dev && to_inode == filestat.st_ino) {
|
|
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 (link(to, bakname) < 0) {
|
|
say3("patch: can't backup %s, output is in %s\n",
|
|
to, from);
|
|
return -1;
|
|
}
|
|
while (unlink(to) >= 0) ;
|
|
}
|
|
#ifdef DEBUGGING
|
|
if (debug & 4)
|
|
say3("Moving %s to %s.\n", from, to);
|
|
#endif
|
|
if (link(from, to) < 0) { /* different file system? */
|
|
Reg4 int tofd;
|
|
|
|
tofd = creat(to, 0666);
|
|
if (tofd < 0) {
|
|
say3("patch: can't create %s, output is in %s.\n",
|
|
to, from);
|
|
return -1;
|
|
}
|
|
fromfd = open(from, 0);
|
|
if (fromfd < 0)
|
|
fatal2("patch: internal error, can't reopen %s\n", from);
|
|
while ((i=read(fromfd, buf, sizeof buf)) > 0)
|
|
if (write(tofd, buf, i) != i)
|
|
fatal1("patch: write failed\n");
|
|
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)
|
|
fatal2("patch: can't create %s.\n", to);
|
|
fromfd = open(from, 0);
|
|
if (fromfd < 0)
|
|
fatal2("patch: internal error, can't reopen %s\n", from);
|
|
while ((i=read(fromfd, buf, sizeof buf)) > 0)
|
|
if (write(tofd, buf, i) != i)
|
|
fatal2("patch: write (%s) failed\n", 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("patch: out of memory (savestr)\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*/
|
|
ask(pat) char *pat; { ; }
|
|
|
|
#else
|
|
|
|
/* Vanilla terminal output (buffered). */
|
|
|
|
void
|
|
say(pat,arg1,arg2,arg3)
|
|
char *pat;
|
|
int 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;
|
|
int arg1,arg2,arg3;
|
|
{
|
|
void my_exit();
|
|
|
|
say(pat, arg1, arg2, arg3);
|
|
my_exit(1);
|
|
}
|
|
|
|
/* Get a response from the user, somehow or other. */
|
|
|
|
void
|
|
ask(pat,arg1,arg2,arg3)
|
|
char *pat;
|
|
int 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()
|
|
{
|
|
void my_exit();
|
|
|
|
#ifndef lint
|
|
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
|
|
Signal(SIGHUP, my_exit);
|
|
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
|
|
Signal(SIGINT, my_exit);
|
|
#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. */
|
|
|
|
void
|
|
makedirs(filename,striplast)
|
|
Reg1 char *filename;
|
|
bool striplast;
|
|
{
|
|
char tmpbuf[256];
|
|
Reg2 char *s = tmpbuf;
|
|
char *dirv[20];
|
|
Reg3 int i;
|
|
Reg4 int dirvp = 0;
|
|
|
|
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++) {
|
|
while (*s) s++;
|
|
*s++ = ' ';
|
|
strcpy(s, tmpbuf);
|
|
*dirv[i] = '/';
|
|
}
|
|
system(buf);
|
|
}
|
|
|
|
/* Make filenames more reasonable. */
|
|
|
|
char *
|
|
fetchname(at,strip_leading,assume_exists)
|
|
char *at;
|
|
int strip_leading;
|
|
int assume_exists;
|
|
{
|
|
char *s;
|
|
char *name;
|
|
Reg1 char *t;
|
|
char tmpbuf[200];
|
|
|
|
if (!at)
|
|
return Nullch;
|
|
s = savestr(at);
|
|
for (t=s; isspace(*t); t++) ;
|
|
name = t;
|
|
#ifdef DEBUGGING
|
|
if (debug & 128)
|
|
say4("fetchname %s %d %d\n",name,strip_leading,assume_exists);
|
|
#endif
|
|
if (strnEQ(name, "/dev/null", 9)) /* so files can be created by diffing */
|
|
return Nullch; /* against /dev/null. */
|
|
for (; *t && !isspace(*t); t++)
|
|
if (*t == '/')
|
|
if (--strip_leading >= 0)
|
|
name = t+1;
|
|
*t = '\0';
|
|
if (name != s && *s != '/') {
|
|
name[-1] = '\0';
|
|
if (stat(s, &filestat) && filestat.st_mode & S_IFDIR) {
|
|
name[-1] = '/';
|
|
name=s;
|
|
}
|
|
}
|
|
name = savestr(name);
|
|
Sprintf(tmpbuf, "RCS/%s", name);
|
|
free(s);
|
|
if (stat(name, &filestat) < 0 && !assume_exists) {
|
|
Strcat(tmpbuf, RCSSUFFIX);
|
|
if (stat(tmpbuf, &filestat) < 0 && stat(tmpbuf+4, &filestat) < 0) {
|
|
Sprintf(tmpbuf, "SCCS/%s%s", SCCSPREFIX, name);
|
|
if (stat(tmpbuf, &filestat) < 0 && stat(tmpbuf+5, &filestat) < 0) {
|
|
free(name);
|
|
name = Nullch;
|
|
}
|
|
}
|
|
}
|
|
return name;
|
|
}
|