move file helper functions to separate file

We have our file helper functions in several places. Move them
all to lib/libfile.c.
With this we no longer have file helpers in fs/fs.c which contains
the core fs functions and no functions in lib/libbb.c which are
not from busybox.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 0 insertions, 93 deletions

diff --git a/lib/libbb.c b/lib/libbb.c
index dd42e662b4..239611c27b 100644
--- a/lib/libbb.c
+++ b/lib/libbb.c
@@ -126,96 +126,3 @@ char *simple_itoa(unsigned int i)
 	return p + 1;
 }
 EXPORT_SYMBOL(simple_itoa);
-
-/*
- * write_full - write to filedescriptor
- *
- * Like write, but guarantees to write the full buffer out, else
- * it returns with an error.
- */
-int write_full(int fd, void *buf, size_t size)
-{
-	size_t insize = size;
-	int now;
-
-	while (size) {
-		now = write(fd, buf, size);
-		if (now <= 0)
-			return now;
-		size -= now;
-		buf += now;
-	}
-
-	return insize;
-}
-EXPORT_SYMBOL(write_full);
-
-/*
- * read_full - read from filedescriptor
- *
- * Like read, but this function only returns less bytes than
- * requested when the end of file is reached.
- */
-int read_full(int fd, void *buf, size_t size)
-{
-	size_t insize = size;
-	int now;
-	int total = 0;
-
-	while (size) {
-		now = read(fd, buf, size);
-		if (now == 0)
-			return total;
-		if (now < 0)
-			return now;
-		total += now;
-		size -= now;
-		buf += now;
-	}
-
-	return insize;
-}
-EXPORT_SYMBOL(read_full);
-
-/*
- * read_file_line - read a line from a file
- *
- * Used to compose a filename from a printf format and to read a line from this
- * file. All leading and trailing whitespaces (including line endings) are
- * removed. The returned buffer must be freed with free(). This function is
- * supposed for reading variable like content into a buffer, so files > 1024
- * bytes are ignored.
- */
-char *read_file_line(const char *fmt, ...)
-{
-	va_list args;
-	char *filename;
-	char *buf, *line = NULL;
-	size_t size;
-	int ret;
-	struct stat s;
-
-	va_start(args, fmt);
-	filename = vasprintf(fmt, args);
-	va_end(args);
-
-	ret = stat(filename, &s);
-	if (ret)
-		goto out;
-
-	if (s.st_size > 1024)
-		goto out;
-
-	buf = read_file(filename, &size);
-	if (!buf)
-		goto out;
-
-	line = strim(buf);
-
-	line = xstrdup(line);
-	free(buf);
-out:
-	free(filename);
-	return line;
-}
-EXPORT_SYMBOL_GPL(read_file_line);