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-rw-r--r--filecntl.c89
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;
+}