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Fix FAT driver file modes, update filewriter accordingly
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This commit is contained in:
Kamil Kowalczyk
2026-03-15 20:18:50 +01:00
parent d7bfc5c8fd
commit af966b5405
5 changed files with 30 additions and 20 deletions
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29
libioutil/filewriter.c
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@@ -38,8 +38,14 @@ int filewriter_init (struct filewriter* fw, const char* volume, const char* path
fw->file_size = desc.size;
fw->flags |= FW_OPEN;
if ((fw->flags & FW_APPEND))
if ((fw->flags & FW_APPEND)) {
fw->write_cursor = desc.size;
} else if ((fw->flags & FW_TRUNCATE)) {
fw->write_cursor = 0;
fw->file_size = 0;
} else {
fw->write_cursor = 0;
}
return FW_OK;
}
@@ -57,26 +63,21 @@ int filewriter_write (struct filewriter* fw, uint8_t* buffer, size_t buffer_size
if (!(fw->flags & FW_OPEN))
return -FW_VOLUME_NOT_OPENED;
struct desc desc;
int ret;
if ((fw->flags & FW_APPEND)) {
if ((ret = describe (fw->path, &desc)) < 0)
return -FW_DESC_ERROR;
fw->file_size = desc.size;
fw->write_cursor = fw->file_size;
}
if (buffer_size > 0) {
if (!(fw->flags & FW_APPEND) && !(fw->write_cursor + buffer_size <= fw->file_size))
return -FW_CURSOR_OOB;
uint32_t wf_flags = 0;
uint32_t flags = (fw->flags & FW_APPEND) ? WF_APPEND : 0;
if ((ret = write_file (fw->path, fw->write_cursor, buffer, buffer_size, flags)) < 0)
if ((fw->flags & FW_TRUNCATE) && fw->write_cursor == 0) {
wf_flags |= WF_TRUNCATE;
}
if ((ret = write_file (fw->path, fw->write_cursor, buffer, buffer_size, wf_flags)) < 0)
return -FW_WRITE_ERROR;
fw->write_cursor += buffer_size;
if (fw->write_cursor > fw->file_size)
fw->file_size = fw->write_cursor;
}
return FW_OK;

1
libioutil/filewriter.h
View File

@@ -17,6 +17,7 @@
#define FW_CREATE_FILE (1 << 0)
#define FW_APPEND (1 << 1)
#define FW_TRUNCATE (1 << 2)
#define FW_OPEN (1 << 31)
struct filewriter {