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author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2018-06-01 20:07:48 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2018-06-08 09:10:07 +0200 |
commit | fd3ecff9ec5e45bf66d27da979c58bf23cd307da (patch) | |
tree | c5733a0b1388bebdf14fd679c3edc5f0c37032ed | |
parent | bf8b6d46db9274c364947a22163b16e05f74211c (diff) | |
download | barebox-fd3ecff9ec5e45bf66d27da979c58bf23cd307da.tar.gz barebox-fd3ecff9ec5e45bf66d27da979c58bf23cd307da.tar.xz |
libfile: implement new helper write_file_flash()
Compared to write_file() this new function also calls erase() to be
suitable for flash devices.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r-- | include/libfile.h | 1 | ||||
-rw-r--r-- | lib/libfile.c | 33 |
2 files changed, 34 insertions, 0 deletions
diff --git a/include/libfile.h b/include/libfile.h index fd2fadeaa8..2c5eef71f1 100644 --- a/include/libfile.h +++ b/include/libfile.h @@ -12,6 +12,7 @@ int read_file_2(const char *filename, size_t *size, void **outbuf, loff_t max_size); int write_file(const char *filename, const void *buf, size_t size); +int write_file_flash(const char *filename, const void *buf, size_t size); int copy_file(const char *src, const char *dst, int verbose); diff --git a/lib/libfile.c b/lib/libfile.c index b7db22d694..d22519b8f4 100644 --- a/lib/libfile.c +++ b/lib/libfile.c @@ -251,6 +251,39 @@ int write_file(const char *filename, const void *buf, size_t size) EXPORT_SYMBOL(write_file); /** + * write_file_flash - write a buffer to a file backed by flash + * @filename: The filename to write + * @size: The size of the buffer + * + * Functional this is identical to write_file but calls erase() before writing. + * + * Return: 0 for success or negative error value + */ +int write_file_flash(const char *filename, const void *buf, size_t size) +{ + int fd, ret; + + fd = open(filename, O_WRONLY); + if (fd < 0) + return fd; + + ret = erase(fd, size, 0); + if (ret < 0) + goto out_close; + + ret = write_full(fd, buf, size); + +out_close: + close(fd); + + if (ret < 0) + return ret; + + return 0; +} +EXPORT_SYMBOL(write_file_flash); + +/** * copy_file - Copy a file * @src: The source filename * @dst: The destination filename |