add directory study
This commit is contained in:
gohigh
364
study/linux-travel/MINIX-1.5/1.5/Source/commands/patch/util.c
Normal file
364
study/linux-travel/MINIX-1.5/1.5/Source/commands/patch/util.c
Normal file
@@ -0,0 +1,364 @@
|
||||
#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;
|
||||
}
|
||||
|
||||
if (origprae) {
|
||||
Strcpy (bakname, origprae);
|
||||
Strcat(bakname, to);
|
||||
} else {
|
||||
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;
|
||||
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;
|
||||
{
|
||||
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;
|
||||
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;
|
||||
{
|
||||
void my_exit();
|
||||
#ifndef lint
|
||||
#ifdef VOIDSIG
|
||||
static void (*hupval)(),(*intval)();
|
||||
#else
|
||||
static int (*hupval)(),(*intval)();
|
||||
#endif
|
||||
|
||||
if (!reset) {
|
||||
hupval = signal(SIGHUP, SIG_IGN);
|
||||
if (hupval != SIG_IGN)
|
||||
#ifdef VOIDSIG
|
||||
hupval = my_exit;
|
||||
#else
|
||||
hupval = (int(*)())my_exit;
|
||||
#endif
|
||||
intval = signal(SIGINT, SIG_IGN);
|
||||
if (intval != SIG_IGN)
|
||||
#ifdef VOIDSIG
|
||||
intval = my_exit;
|
||||
#else
|
||||
intval = (int(*)())my_exit;
|
||||
#endif
|
||||
}
|
||||
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. */
|
||||
|
||||
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;
|
||||
}
|
||||
Reference in New Issue
Block a user