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procfs skeleton: Some additional, purely cosmetic updates.

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This commit is contained in:
Gregory Nutt 2017-02-15 12:47:51 -06:00
parent 504f677c20
commit be7a904d1b
1 changed files with 22 additions and 18 deletions
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40
fs/procfs/fs_skeleton.c
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@ -72,6 +72,7 @@
/**************************************************************************** /****************************************************************************
* Private Types * Private Types
****************************************************************************/ ****************************************************************************/
/* This enumeration identifies all of the thread attributes that can be /* This enumeration identifies all of the thread attributes that can be
* accessed via the procfs file system. * accessed via the procfs file system.
*/ */
@ -107,7 +108,7 @@ static int skel_open(FAR struct file *filep, FAR const char *relpath,
static int skel_close(FAR struct file *filep); static int skel_close(FAR struct file *filep);
static ssize_t skel_read(FAR struct file *filep, FAR char *buffer, static ssize_t skel_read(FAR struct file *filep, FAR char *buffer,
size_t buflen); size_t buflen);
/* TODO: Should not support skel_write if read-only */ /* TODO: Should not support skel_write if read-only */
static ssize_t skel_write(FAR struct file *filep, FAR const char *buffer, static ssize_t skel_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen); size_t buflen);
static int skel_dup(FAR const struct file *oldp, static int skel_dup(FAR const struct file *oldp,
@ -171,10 +172,9 @@ static int skel_open(FAR struct file *filep, FAR const char *relpath,
finfo("Open '%s'\n", relpath); finfo("Open '%s'\n", relpath);
/* PROCFS is read-only. Any attempt to open with any kind of write /* If PROCFS is read-only, then the (1) the skel_write() method must not
* access is not permitted. * be provided and (2) any attempt to open with any kind of write access
* * can not be permitted.
* REVISIT: Write-able proc files could be quite useful.
*/ */
if (((oflags & O_WRONLY) != 0 || (oflags & O_RDONLY) == 0) && if (((oflags & O_WRONLY) != 0 || (oflags & O_RDONLY) == 0) &&
@ -193,7 +193,7 @@ static int skel_open(FAR struct file *filep, FAR const char *relpath,
return -ENOMEM; return -ENOMEM;
} }
/* TODO: Initialize the context specific data here */ /* TODO: Initialize the context specific data here */
/* Save the open file structure as the open-specific state in /* Save the open file structure as the open-specific state in
* filep->f_priv. * filep->f_priv.
@ -244,9 +244,9 @@ static ssize_t skel_read(FAR struct file *filep, FAR char *buffer,
priv = (FAR struct skel_file_s *)filep->f_priv; priv = (FAR struct skel_file_s *)filep->f_priv;
DEBUGASSERT(priv); DEBUGASSERT(priv);
/* TODO: Provide the requested data. /* TODO: Provide the requested data.
* Take into account current filep->f_pos and 'buflen'. The read could * Take into account current filep->f_pos and 'buflen'. The read
* require several calls to skel_read(). * could require several calls to skel_read().
*/ */
ret = 0; ret = 0;
@ -283,11 +283,11 @@ static ssize_t skel_write(FAR struct file *filep, FAR const char *buffer,
priv = (FAR struct skel_file_s *)filep->f_priv; priv = (FAR struct skel_file_s *)filep->f_priv;
DEBUGASSERT(priv); DEBUGASSERT(priv);
/* TODO: Verify that the write is within range */ /* TODO: Verify that the write is within range */
/* TODO: Handle the write data as appropriate to function of file. /* TODO: Handle the write data as appropriate to function of file.
* Take into account current filep->f_pos and 'buflen' since the write * Take into account current filep->f_pos and 'buflen' since the
* may require several calls to skel_write(). * write may require several calls to skel_write().
*/ */
ret = 0; ret = 0;
@ -421,9 +421,9 @@ static int skel_readdir(FAR struct fs_dirent_s *dir)
DEBUGASSERT(dir && dir->u.procfs); DEBUGASSERT(dir && dir->u.procfs);
level1 = dir->u.procfs; level1 = dir->u.procfs;
/* TODO: Perform device specific readdir function here. This may /* TODO: Perform device specific readdir function here. This may
* or may not involve validating the nentries variable * or may not involve validating the nentries variable
* in the base depending on the implementation. * in the base depending on the implementation.
*/ */
/* Have we reached the end of the directory */ /* Have we reached the end of the directory */
@ -445,7 +445,7 @@ static int skel_readdir(FAR struct fs_dirent_s *dir)
{ {
DEBUGASSERT(level1->base.level == 1); DEBUGASSERT(level1->base.level == 1);
/* TODO: Add device specific entries */ /* TODO: Add device specific entries */
strcpy(filename, "dummy"); strcpy(filename, "dummy");
@ -501,7 +501,11 @@ static int skel_stat(FAR const char *relpath, FAR struct stat *buf)
memset(buf, 0, sizeof(struct stat)); memset(buf, 0, sizeof(struct stat));
buf->st_mode = S_IFDIR | S_IROTH | S_IRGRP | S_IRUSR; buf->st_mode = S_IFDIR | S_IROTH | S_IRGRP | S_IRUSR;
/* Other 'struct buf' settings may be appropriate (optional) */ /* TODO: Set S_IFREG if the relpath refers to a file.
/* TODO: If the skel_write() method is supported, then stat must also
* report S_IWOTH | S_IWGRP | S_IWUSR for files (but not for
* directories) as well.
/* TODO: Other 'struct buf' settings may be appropriate (optional) */
ret = OK; ret = OK;