1 files changed, 89 insertions, 0 deletions
diff --git a/filecntl.c b/filecntl.c
new file mode 100644
index 0000000..6cb9c9e
--- /dev/null
+++ b/filecntl.c
@@ -0,0 +1,89 @@
+/*  written 2007 by Bernhard R. Link
+ *  This file is in the public domain.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ */
+#include <config.h>
+
+#include <limits.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <assert.h>
+
+#include "filecntl.h"
+
+#ifndef HAVE_CLOSEFROM
+void closefrom(int lowfd) {
+	long maxopen;
+	int fd;
+
+# ifdef F_CLOSEM
+	if (fcntl(lowfd, F_CLOSEM, NULL) == 0)
+		return;
+# endif
+	maxopen = sysconf(_SC_OPEN_MAX);
+	if (maxopen > INT_MAX)
+		maxopen = INT_MAX;
+	if (maxopen < 0)
+		maxopen = 1024;
+	for (fd = lowfd ; fd <= maxopen ; fd++)
+		(void)close(fd);
+}
+#endif
+
+void markcloseonexec(int fd) {
+	long l;
+	l = fcntl(fd, F_GETFD, 0);
+	if (l >= 0) {
+		(void)fcntl(fd, F_SETFD, l|FD_CLOEXEC);
+	}
+}
+
+int deletefile(const char *fullfilename) {
+	int ret, e;
+
+	ret = unlink(fullfilename);
+	if (ret != 0) {
+		e = errno;
+		fprintf(stderr, "error %d unlinking %s: %s\n",
+				e, fullfilename, strerror(e));
+		return (e != 0)?e:EINVAL;
+	}
+	return 0;
+}
+
+bool isregularfile(const char *fullfilename) {
+	struct stat s;
+	int i;
+
+	assert(fullfilename != NULL);
+	i = stat(fullfilename, &s);
+	return i == 0 && S_ISREG(s.st_mode);
+}
+
+bool isdirectory(const char *fullfilename) {
+	struct stat s;
+	int i;
+
+	assert(fullfilename != NULL);
+	i = stat(fullfilename, &s);
+	return i == 0 && S_ISDIR(s.st_mode);
+}
+
+bool isanyfile(const char *fullfilename) {
+	struct stat s;
+	int i;
+
+	assert(fullfilename != NULL);
+	i = lstat(fullfilename, &s);
+	return i == 0;
+}