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author | Jeremy Kerr <jk@ozlabs.org> | 2013-10-01 12:27:35 +0800 |
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committer | Jeremy Kerr <jk@ozlabs.org> | 2013-10-01 12:52:00 +0800 |
commit | 9fbd73a208c9465b4bf9e2c80c7290b72e62ead1 (patch) | |
tree | a0e2899a65433c23105140ab8591b10c19325c32 /discover/parser.c | |
parent | b86a7a0533c4d723ea940ac2071f845f165f832c (diff) | |
download | talos-petitboot-9fbd73a208c9465b4bf9e2c80c7290b72e62ead1.tar.gz talos-petitboot-9fbd73a208c9465b4bf9e2c80c7290b72e62ead1.zip |
discover: Add device_{request,release}_write
Add a pair of functions to the parser API to allow write access to the
underlying device. We'll use this in the GRUB2 parser to implement
environment persistence.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Diffstat (limited to 'discover/parser.c')
-rw-r--r-- | discover/parser.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/discover/parser.c b/discover/parser.c index d34600d..4816916 100644 --- a/discover/parser.c +++ b/discover/parser.c @@ -49,6 +49,35 @@ int parser_request_file(struct discover_context *ctx, return rc; } +int parser_replace_file(struct discover_context *ctx, + struct discover_device *dev, const char *filename, + char *buf, int len) +{ + bool release; + char *path; + int rc; + + if (!dev->mounted) + return -1; + + rc = device_request_write(dev, &release); + if (rc) { + pb_log("Can't write file %s: device doesn't allow write\n", + dev->device_path); + return -1; + } + + path = local_path(ctx, dev, filename); + + rc = replace_file(path, buf, len); + + talloc_free(path); + + device_release_write(dev, release); + + return rc; +} + static int download_config(struct discover_context *ctx, char **buf, int *len) { struct load_url_result *result; |