Finish importing Lite2's src/usr.bin, except for ex, diff, grep, mail,

pascal and vmstat.sparc.  All changed files on the vendor branch should
already have been imported.

1 files changed, 339 insertions, 0 deletions

diff --git a/usr.bin/patch/util.c b/usr.bin/patch/util.c
new file mode 100644
index 0000000..5582d18
--- /dev/null
+++ b/usr.bin/patch/util.c
@@ -0,0 +1,339 @@
+#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;
+}