1 files changed, 170 insertions, 0 deletions
diff --git a/support/nfs/xio.c b/support/nfs/xio.c
new file mode 100644
index 0000000..6962751
--- /dev/null
+++ b/support/nfs/xio.c
@@ -0,0 +1,170 @@
+/*
+ * support/nfs/xio.c
+ * 
+ * Simple I/O functions for the parsing of /etc/exports and /etc/nfsclients.
+ *
+ * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <signal.h>
+#include <unistd.h>
+#include <errno.h>
+#include "xmalloc.h"
+#include "xlog.h"
+#include "xio.h"
+
+XFILE *
+xfopen(char *fname, char *type)
+{
+	XFILE	*xfp;
+	FILE	*fp;
+
+	if (!(fp = fopen(fname, type)))
+		return NULL;
+	xfp = (XFILE *) xmalloc(sizeof(*xfp));
+	xfp->x_fp = fp;
+	xfp->x_line = 1;
+
+	return xfp;
+}
+
+void
+xfclose(XFILE *xfp)
+{
+	fclose(xfp->x_fp);
+	xfree(xfp);
+}
+
+int
+xflock(char *fname, char *type)
+{
+	int		readonly = !strcmp(type, "r");
+	struct flock	fl = { readonly? F_RDLCK : F_WRLCK, SEEK_SET, 0, 0, 0 };
+	int		fd;
+
+	if (readonly)
+		fd = open(fname, (O_RDONLY|O_CREAT), 0600);
+	else
+		fd = open(fname, (O_RDWR|O_CREAT), 0600);
+	if (fd < 0) {
+		xlog(L_WARNING, "could not open %s for locking: errno %d (%s)",
+				fname, errno, strerror(errno));
+		return -1;
+	}
+
+	if (fcntl(fd, F_SETLKW, &fl) < 0) {
+		xlog(L_WARNING, "failed to lock %s: errno %d (%s)",
+				fname, errno, strerror(errno));
+		close(fd);
+		fd = -1;
+	}
+
+	return fd;
+}
+
+void
+xfunlock(int fd)
+{
+	close(fd);
+}
+
+#define isoctal(x) (isdigit(x) && ((x)<'8'))
+int
+xgettok(XFILE *xfp, char sepa, char *tok, int len)
+{
+	int	i = 0;
+	int	c = 0;
+	int 	quoted=0;
+
+	while (i < len && (c = xgetc(xfp)) != EOF &&
+	       (quoted || (c != sepa && !isspace(c)))) {
+		if (c == '"') {
+			quoted = !quoted;
+			continue;
+		}
+		tok[i++] = c;
+		if (i >= 4 &&
+		    tok[i-4] == '\\' &&
+		    isoctal(tok[i-3]) &&
+		    isoctal(tok[i-2]) &&
+		    isoctal(tok[i-1]) &&
+		    ((tok[i]=0),
+		     (c = strtol(tok+i-3,NULL, 8)) < 256)) {
+			i -= 4;
+			tok[i++] = c;
+		}
+	}	
+	if (c == '\n')
+		xungetc(c, xfp);
+	if (!i)
+		return 0;
+	if (i >= len || (sepa && c != sepa))
+		return -1;
+	tok[i] = '\0';
+	return 1;
+}
+
+int
+xgetc(XFILE *xfp)
+{
+	int	c = getc(xfp->x_fp);
+
+	if (c == EOF)
+		return c;
+	if (c == '\\') {
+		if ((c = getc(xfp->x_fp)) != '\n') {
+			ungetc(c, xfp->x_fp);
+			return '\\';
+		}
+		xfp->x_line++;
+		while ((c = getc(xfp->x_fp)) == ' ' || c == '\t');
+		ungetc(c, xfp->x_fp);
+		return ' ';
+	}
+	if (c == '\n')
+		xfp->x_line++;
+	return c;
+}
+
+void
+xungetc(int c, XFILE *xfp)
+{
+	if (c == EOF)
+		return;
+
+	ungetc(c, xfp->x_fp);
+	if (c == '\n')
+		xfp->x_line--;
+}
+
+void
+xskip(XFILE *xfp, char *str)
+{
+	int	c;
+
+	while ((c = xgetc(xfp)) != EOF) {
+		if (c == '#')
+			c = xskipcomment(xfp);
+		if (strchr(str, c) == NULL)
+			break;
+	}
+	xungetc(c, xfp);
+}
+
+char
+xskipcomment(XFILE *xfp)
+{
+	int	c;
+
+	while ((c = getc(xfp->x_fp)) != EOF && c != '\n');
+	return c;
+}