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/* This file is part of the auxiliaries library.
Written by Dick Grune, Vrije Universiteit, Amsterdam.
$Id: ForEachFile.c,v 1.25 2017-12-13 17:41:34 Gebruiker Exp $
*/
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <errno.h>
#include "ForEachFile.h"
/* Library module source prelude */
#undef _FOREACHFILE_CODE_
#ifndef lint
#define _FOREACHFILE_CODE_
#endif
#ifdef LIB
#define _FOREACHFILE_CODE_
#endif
#ifdef _FOREACHFILE_CODE_
/* Library module source code */
/* TREE SCANNING */
#ifdef S_IFLNK /* system with symbolic links */
#define LSTAT lstat
#else /* S_IFLNK */
#define LSTAT Stat
#endif /* S_IFLNK */
int
is_dirstat(const struct stat *fs) {
if (!fs) return 0;
return ((fs->st_mode & S_IFMT) == S_IFDIR);
}
int
is_Dirname(const Fchar *Fn) {
if (!Fn) return 0;
struct stat stb;
if (LSTAT(Fn, &stb) < 0) return 0;
return ((stb.st_mode & S_IFMT) == S_IFDIR);
}
int
is_Admin_Dirname(const Fchar *Fn) {
if (!Fn) return 0;
return Fnamecmp(Fn, str2Fname(".")) == 0
|| Fnamecmp(Fn, str2Fname("..")) == 0;
}
static void do_dir( /* mutually recursive with do_name() */
Fchar *Fn,
int (*proc)(const Fchar *, const char *, const struct stat *)
);
static void
do_name(Fchar *Fn,
int (*proc)(const Fchar *, const char *, const struct stat *),
int top_level
) {
/* examine Fn */
struct stat fs;
if (LSTAT(Fn, &fs) < 0) {
(void)(*proc)(Fn, strerror(errno), 0);
return;
}
/* report on Fn and get possible return code */
int rc = (*proc)(Fn, (char*)0, &fs);
if (!is_dirstat(&fs)) return;
/* Fn is a directory, so rc may be meaningful */
if (!top_level) if (!rc) return;
#ifdef S_IFLNK
/* don't follow links */
if ((fs.st_mode & S_IFMT) == S_IFLNK) return;
#endif
do_dir(Fn, proc);
}
static void
do_dir(
Fchar *Fn,
int (*proc)(const Fchar *, const char *, const struct stat *)
) {
/* treat directory */
Dir_t *dir = Opendir(Fn);
if (dir == 0) {
(void)(*proc)(Fn, "directory not readable", 0);
return;
}
/* scan new directory */
/* append separator */
int Fn_len = Fnamelen(Fn);
Fn[Fn_len++] = '/';
Fn[Fn_len] = '\0';
/* descend */
Dirent_t *dent;
while ((dent = Readdir(dir)) != (Dirent_t *)0) {
const Fchar *d_name = dent->d_name;
if (is_Admin_Dirname(d_name)) continue;
/* append name */
Fnamecat(Fn, d_name);
do_name(Fn, proc, 0);
/* remove appended name*/
Fn[Fn_len] = '\0';
}
/* remove appended separator*/
Fn[--Fn_len] = '\0';
Closedir(dir);
}
static MSDOS_sep = (Fchar)'\\';
static UNIX_sep = (Fchar)'/';
static void
clean_name(Fchar *Fn) {
/* remove a trailing separator */
int Fn_len = Fnamelen(Fn);
if (Fn_len > 1 && (Fn[Fn_len-1] == MSDOS_sep || Fn[Fn_len-1] == UNIX_sep)) {
Fn[Fn_len-1] = '\0';
}
}
/* THE ENTRIES */
void
ForEachFile(
const Fchar *Fname,
int (*proc)(const Fchar *, const char *, const struct stat *)
) {
if (!Fname || !Fname[0] || !proc) return; /* just to make sure */
/* get Fn */
Fchar Fn[MAX_FILE_NAME_LENGTH];
Fnamecpy(Fn, Fname);
clean_name(Fn);
/* top level */
do_name(Fn, proc, 1);
}
/* End library module source code */
#endif /* _FOREACHFILE_CODE_ */
#ifdef lint
static void
satisfy_lint(void *x) {
(void)is_dirstat(0);
(void)is_Dirname(0);
(void)is_Admin_Dirname(0);
ForEachFile(0, 0);
satisfy_lint(x);
}
#endif /* lint */
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