interactive.c

早期freebsd实现

	strcpy(name, ap->glob.gl_pathv[ap->glob.gl_pathc - ap->argcnt]);
	if (--ap->argcnt == 0) {
		ap->freeglob = 0;
		globfree(&ap->glob);
	}
#	undef rawname
}

/*
 * Strip off the next token of the input.
 */
static char *
copynext(input, output)
	char *input, *output;
{
	register char *cp, *bp;
	char quote;

	for (cp = input; *cp == ' ' || *cp == '\t'; cp++)
		/* skip to argument */;
	bp = output;
	while (*cp != ' ' && *cp != '\t' && *cp != '\0') {
		/*
		 * Handle back slashes.
		 */
		if (*cp == '\\') {
			if (*++cp == '\0') {
				fprintf(stderr,
					"command lines cannot be continued\n");
				continue;
			}
			*bp++ = *cp++;
			continue;
		}
		/*
		 * The usual unquoted case.
		 */
		if (*cp != '\'' && *cp != '"') {
			*bp++ = *cp++;
			continue;
		}
		/*
		 * Handle single and double quotes.
		 */
		quote = *cp++;
		while (*cp != quote && *cp != '\0')
			*bp++ = *cp++ | 0200;
		if (*cp++ == '\0') {
			fprintf(stderr, "missing %c\n", quote);
			cp--;
			continue;
		}
	}
	*bp = '\0';
	return (cp);
}

/*
 * Canonicalize file names to always start with ``./'' and
 * remove any imbedded "." and ".." components.
 */
void
canon(rawname, canonname)
	char *rawname, *canonname;
{
	register char *cp, *np;

	if (strcmp(rawname, ".") == 0 || strncmp(rawname, "./", 2) == 0)
		(void) strcpy(canonname, "");
	else if (rawname[0] == '/')
		(void) strcpy(canonname, ".");
	else
		(void) strcpy(canonname, "./");
	(void) strcat(canonname, rawname);
	/*
	 * Eliminate multiple and trailing '/'s
	 */
	for (cp = np = canonname; *np != '\0'; cp++) {
		*cp = *np++;
		while (*cp == '/' && *np == '/')
			np++;
	}
	*cp = '\0';
	if (*--cp == '/')
		*cp = '\0';
	/*
	 * Eliminate extraneous "." and ".." from pathnames.
	 */
	for (np = canonname; *np != '\0'; ) {
		np++;
		cp = np;
		while (*np != '/' && *np != '\0')
			np++;
		if (np - cp == 1 && *cp == '.') {
			cp--;
			(void) strcpy(cp, np);
			np = cp;
		}
		if (np - cp == 2 && strncmp(cp, "..", 2) == 0) {
			cp--;
			while (cp > &canonname[1] && *--cp != '/')
				/* find beginning of name */;
			(void) strcpy(cp, np);
			np = cp;
		}
	}
}

/*
 * Do an "ls" style listing of a directory
 */
static void
printlist(name, basename)
	char *name;
	char *basename;
{
	register struct afile *fp, *list, *listp;
	register struct direct *dp;
	struct afile single;
	RST_DIR *dirp;
	int entries, len;

	dp = pathsearch(name);
	if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0))
		return;
	if ((dirp = rst_opendir(name)) == NULL) {
		entries = 1;
		list = &single;
		mkentry(dp, list);
		len = strlen(basename) + 1;
		if (strlen(name) - len > single.len) {
			freename(single.fname);
			single.fname = savename(&name[len]);
			single.len = strlen(single.fname);
		}
	} else {
		entries = 0;
		while (dp = rst_readdir(dirp))
			entries++;
		rst_closedir(dirp);
		list = (struct afile *)malloc(entries * sizeof(struct afile));
		if (list == NULL) {
			fprintf(stderr, "ls: out of memory\n");
			return;
		}
		if ((dirp = rst_opendir(name)) == NULL)
			panic("directory reopen failed\n");
		fprintf(stderr, "%s:\n", name);
		entries = 0;
		listp = list;
		while (dp = rst_readdir(dirp)) {
			if (dp == NULL || dp->d_ino == 0)
				break;
			if (!dflag && TSTINO(dp->d_ino, dumpmap) == 0)
				continue;
			if (vflag == 0 &&
			    (strcmp(dp->d_name, ".") == 0 ||
			     strcmp(dp->d_name, "..") == 0))
				continue;
			mkentry(dp, listp++);
			entries++;
		}
		rst_closedir(dirp);
		if (entries == 0) {
			fprintf(stderr, "\n");
			free(list);
			return;
		}
		qsort((char *)list, entries, sizeof(struct afile), fcmp);
	}
	formatf(list, entries);
	if (dirp != NULL) {
		for (fp = listp - 1; fp >= list; fp--)
			freename(fp->fname);
		fprintf(stderr, "\n");
		free(list);
	}
}

/*
 * Read the contents of a directory.
 */
static void
mkentry(dp, fp)
	struct direct *dp;
	register struct afile *fp;
{
	char *cp;
	struct entry *np;

	fp->fnum = dp->d_ino;
	fp->fname = savename(dp->d_name);
	for (cp = fp->fname; *cp; cp++)
		if (!vflag && (*cp < ' ' || *cp >= 0177))
			*cp = '?';
	fp->len = cp - fp->fname;
	if (dflag && TSTINO(fp->fnum, dumpmap) == 0)
		fp->prefix = '^';
	else if ((np = lookupino(fp->fnum)) != NULL && (np->e_flags & NEW))
		fp->prefix = '*';
	else
		fp->prefix = ' ';
	switch(dp->d_type) {

	default:
		fprintf(stderr, "Warning: undefined file type %d\n",
		    dp->d_type);
		/* fall through */
	case DT_REG:
		fp->postfix = ' ';
		break;

	case DT_LNK:
		fp->postfix = '@';
		break;

	case DT_FIFO:
	case DT_SOCK:
		fp->postfix = '=';
		break;

	case DT_CHR:
	case DT_BLK:
		fp->postfix = '#';
		break;

	case DT_UNKNOWN:
	case DT_DIR:
		if (inodetype(dp->d_ino) == NODE)
			fp->postfix = '/';
		else
			fp->postfix = ' ';
		break;
	}
	return;
}

/*
 * Print out a pretty listing of a directory
 */
static void
formatf(list, nentry)
	register struct afile *list;
	int nentry;
{
	register struct afile *fp, *endlist;
	int width, bigino, haveprefix, havepostfix;
	int i, j, w, precision, columns, lines;

	width = 0;
	haveprefix = 0;
	havepostfix = 0;
	bigino = ROOTINO;
	endlist = &list[nentry];
	for (fp = &list[0]; fp < endlist; fp++) {
		if (bigino < fp->fnum)
			bigino = fp->fnum;
		if (width < fp->len)
			width = fp->len;
		if (fp->prefix != ' ')
			haveprefix = 1;
		if (fp->postfix != ' ')
			havepostfix = 1;
	}
	if (haveprefix)
		width++;
	if (havepostfix)
		width++;
	if (vflag) {
		for (precision = 0, i = bigino; i > 0; i /= 10)
			precision++;
		width += precision + 1;
	}
	width++;
	columns = 81 / width;
	if (columns == 0)
		columns = 1;
	lines = (nentry + columns - 1) / columns;
	for (i = 0; i < lines; i++) {
		for (j = 0; j < columns; j++) {
			fp = &list[j * lines + i];
			if (vflag) {
				fprintf(stderr, "%*d ", precision, fp->fnum);
				fp->len += precision + 1;
			}
			if (haveprefix) {
				putc(fp->prefix, stderr);
				fp->len++;
			}
			fprintf(stderr, "%s", fp->fname);
			if (havepostfix) {
				putc(fp->postfix, stderr);
				fp->len++;
			}
			if (fp + lines >= endlist) {
				fprintf(stderr, "\n");
				break;
			}
			for (w = fp->len; w < width; w++)
				putc(' ', stderr);
		}
	}
}

/*
 * Skip over directory entries that are not on the tape
 *
 * First have to get definition of a dirent.
 */
#undef DIRBLKSIZ
#include <dirent.h>
#undef d_ino

struct dirent *
glob_readdir(dirp)
	RST_DIR *dirp;
{
	struct direct *dp;
	static struct dirent adirent;

	while ((dp = rst_readdir(dirp)) != NULL) {
		if (dp->d_ino == 0)
			continue;
		if (dflag || TSTINO(dp->d_ino, dumpmap))
			break;
	}
	if (dp == NULL)
		return (NULL);
	adirent.d_fileno = dp->d_ino;
	adirent.d_namlen = dp->d_namlen;
	bcopy(dp->d_name, adirent.d_name, dp->d_namlen + 1);
	return (&adirent);
}

/*
 * Return st_mode information in response to stat or lstat calls
 */
static int
glob_stat(name, stp)
	const char *name;
	struct stat *stp;
{
	register struct direct *dp;

	dp = pathsearch(name);
	if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0))
		return (-1);
	if (inodetype(dp->d_ino) == NODE)
		stp->st_mode = IFDIR;
	else
		stp->st_mode = IFREG;
	return (0);
}

/*
 * Comparison routine for qsort.
 */
static int
fcmp(f1, f2)
	register const void *f1, *f2;
{
	return (strcmp(((struct afile *)f1)->fname,
	    ((struct afile *)f2)->fname));
}

/*
 * respond to interrupts
 */
void
onintr(signo)
	int signo;
{
	if (command == 'i' && runshell)
		longjmp(reset, 1);
	if (reply("restore interrupted, continue") == FAIL)
		done(1);
}