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tmpfs: write end of file if open flag with O_APPEND

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Signed-off-by: Shoukui Zhang <zhangshoukui@xiaomi.com>
This commit is contained in:
Shoukui Zhang 2024-04-28 21:50:43 +08:00 committed by Xiang Xiao
parent 3f3ad34f42
commit a3b94383ed
1 changed files with 11 additions and 2 deletions
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13
fs/tmpfs/fs_tmpfs.c
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@ -1605,7 +1605,15 @@ static ssize_t tmpfs_write(FAR struct file *filep, FAR const char *buffer,
/* Handle attempts to write beyond the end of the file */
startpos = filep->f_pos;
if ((filep->f_oflags & O_APPEND) != 0)
{
startpos = tfo->tfo_size;
}
else
{
startpos = filep->f_pos;
}
nwritten = buflen;
endpos = startpos + buflen;
@ -1625,13 +1633,14 @@ static ssize_t tmpfs_write(FAR struct file *filep, FAR const char *buffer,
if (tfo->tfo_data != NULL)
{
memcpy(&tfo->tfo_data[startpos], buffer, nwritten);
filep->f_pos += nwritten;
}
else
{
DEBUGASSERT(tfo->tfo_size == 0 && nwritten == 0);
}
filep->f_pos = endpos;
/* Release the lock on the file */
tmpfs_unlock_file(tfo);