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-rw-r--r--include/fileutils.h103
1 files changed, 103 insertions, 0 deletions
diff --git a/include/fileutils.h b/include/fileutils.h
new file mode 100644
index 0000000..8722ed5
--- /dev/null
+++ b/include/fileutils.h
@@ -0,0 +1,103 @@
+#ifndef UTIL_LINUX_FILEUTILS
+#define UTIL_LINUX_FILEUTILS
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <sys/stat.h>
+
+#include "c.h"
+
+extern int mkstemp_cloexec(char *template);
+
+extern int xmkstemp(char **tmpname, const char *dir, const char *prefix);
+
+static inline FILE *xfmkstemp(char **tmpname, const char *dir, const char *prefix)
+{
+ int fd;
+ FILE *ret;
+
+ fd = xmkstemp(tmpname, dir, prefix);
+ if (fd == -1)
+ return NULL;
+
+ if (!(ret = fdopen(fd, "w+" UL_CLOEXECSTR))) {
+ close(fd);
+ return NULL;
+ }
+ return ret;
+}
+
+#ifdef HAVE_OPENAT
+static inline FILE *fopen_at(int dir, const char *filename,
+ int flags, const char *mode)
+{
+ int fd = openat(dir, filename, flags);
+ FILE *ret;
+
+ if (fd < 0)
+ return NULL;
+
+ ret = fdopen(fd, mode);
+ if (!ret)
+ close(fd);
+ return ret;
+}
+#endif
+
+static inline int is_same_inode(const int fd, const struct stat *st)
+{
+ struct stat f;
+
+ if (fstat(fd, &f) < 0)
+ return 0;
+ else if (f.st_dev != st->st_dev || f.st_ino != st->st_ino)
+ return 0;
+ return 1;
+}
+
+extern int dup_fd_cloexec(int oldfd, int lowfd);
+extern unsigned int get_fd_tabsize(void);
+
+extern int ul_mkdir_p(const char *path, mode_t mode);
+extern char *stripoff_last_component(char *path);
+
+/* This is readdir()-like function, but skips "." and ".." directory entries */
+static inline struct dirent *xreaddir(DIR *dp)
+{
+ struct dirent *d;
+
+ while ((d = readdir(dp))) {
+ if (!strcmp(d->d_name, ".") ||
+ !strcmp(d->d_name, ".."))
+ continue;
+ break;
+ }
+ return d;
+}
+
+#ifdef HAVE_SYS_SYSCALL_H
+# include <sys/syscall.h>
+# if defined(SYS_close_range)
+# include <sys/types.h>
+# ifndef HAVE_CLOSE_RANGE
+static inline int close_range(unsigned int first, unsigned int last, int flags)
+{
+ return syscall(SYS_close_range, first, last, flags);
+}
+# endif
+# define HAVE_CLOSE_RANGE 1
+# endif /* SYS_close_range */
+#endif /* HAVE_SYS_SYSCALL_H */
+
+extern void ul_close_all_fds(unsigned int first, unsigned int last);
+
+#define UL_COPY_READ_ERROR (-1)
+#define UL_COPY_WRITE_ERROR (-2)
+int ul_copy_file(int from, int to);
+
+
+extern int ul_reopen(int fd, int flags);
+
+#endif /* UTIL_LINUX_FILEUTILS */