libburnia/libisofs
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Add low level functions to create a node.

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This commit is contained in:
Vreixo Formoso
2008-01-25 22:57:29 +01:00
parent 6bb58a2cd1
commit fc3f25c093
2 changed files with 198 additions and 0 deletions
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116
src/node.c
View File

@ -739,3 +739,119 @@ int iso_node_new_root(IsoDir **root)
*root = dir;
return ISO_SUCCESS;
}
int iso_node_new_dir(char *name, IsoDir **dir)
{
IsoDir *new;
if (dir == NULL || name == NULL) {
return ISO_NULL_POINTER;
}
/* check if the name is valid */
if (!iso_node_is_valid_name(name)) {
return ISO_WRONG_ARG_VALUE;
}
new = calloc(1, sizeof(IsoDir));
if (new == NULL) {
return ISO_OUT_OF_MEM;
}
new->node.refcount = 1;
new->node.type = LIBISO_DIR;
new->node.name = name;
new->node.mode = S_IFDIR;
*dir = new;
return ISO_SUCCESS;
}
int iso_node_new_file(char *name, IsoStream *stream, IsoFile **file)
{
IsoFile *new;
if (file == NULL || name == NULL || stream == NULL) {
return ISO_NULL_POINTER;
}
/* check if the name is valid */
if (!iso_node_is_valid_name(name)) {
return ISO_WRONG_ARG_VALUE;
}
new = calloc(1, sizeof(IsoFile));
if (new == NULL) {
return ISO_OUT_OF_MEM;
}
new->node.refcount = 1;
new->node.type = LIBISO_FILE;
new->node.name = name;
new->node.mode = S_IFREG;
new->stream = stream;
*file = new;
return ISO_SUCCESS;
}
int iso_node_new_symlink(char *name, char *dest, IsoSymlink **link)
{
IsoSymlink *new;
if (link == NULL || name == NULL || dest == NULL) {
return ISO_NULL_POINTER;
}
/* check if the name is valid */
if (!iso_node_is_valid_name(name)) {
return ISO_WRONG_ARG_VALUE;
}
/* check if destination is valid */
if (!iso_node_is_valid_link_dest(dest)) {
/* guard against null or empty dest */
return ISO_WRONG_ARG_VALUE;
}
new = calloc(1, sizeof(IsoSymlink));
if (new == NULL) {
return ISO_OUT_OF_MEM;
}
new->node.refcount = 1;
new->node.type = LIBISO_SYMLINK;
new->node.name = name;
new->dest = dest;
new->node.mode = S_IFLNK;
*link = new;
return ISO_SUCCESS;
}
int iso_node_new_special(char *name, mode_t mode, dev_t dev,
IsoSpecial **special)
{
IsoSpecial *new;
if (special == NULL || name == NULL) {
return ISO_NULL_POINTER;
}
if (S_ISLNK(mode) || S_ISREG(mode) || S_ISDIR(mode)) {
return ISO_WRONG_ARG_VALUE;
}
/* check if the name is valid */
if (!iso_node_is_valid_name(name)) {
return ISO_WRONG_ARG_VALUE;
}
new = calloc(1, sizeof(IsoSpecial));
if (new == NULL) {
return ISO_OUT_OF_MEM;
}
new->node.refcount = 1;
new->node.type = LIBISO_SPECIAL;
new->node.name = name;
new->node.mode = mode;
new->dev = dev;
*special = new;
return ISO_SUCCESS;
}

82
src/node.h
View File

@ -159,6 +159,88 @@ struct Iso_Dir_Iter
int iso_node_new_root(IsoDir **root);
/**
* Create a new IsoDir. Attributes, uid/gid, timestamps, etc are set to
* default (0) values. You must set them.
*
* @param name
* Name for the node. It is not strdup() so you shouldn't use this
* reference when this function returns successfully. NULL is not
* allowed.
* @param dir
*
* @return
* 1 on success, < 0 on error.
*/
int iso_node_new_dir(char *name, IsoDir **dir);
/**
* Create a new file node. Attributes, uid/gid, timestamps, etc are set to
* default (0) values. You must set them.
*
* @param name
* Name for the node. It is not strdup() so you shouldn't use this
* reference when this function returns successfully. NULL is not
* allowed.
* @param stream
* Source for file contents. The reference is taken by the node,
* you must call iso_stream_ref() if you need your own ref.
* @return
* 1 on success, < 0 on error.
*/
int iso_node_new_file(char *name, IsoStream *stream, IsoFile **file);
/**
* Creates a new IsoSymlink node. Attributes, uid/gid, timestamps, etc are set
* to default (0) values. You must set them.
*
* @param name
* name for the new symlink. It is not strdup() so you shouldn't use this
* reference when this function returns successfully. NULL is not
* allowed.
* @param dest
* destination of the link. It is not strdup() so you shouldn't use this
* reference when this function returns successfully. NULL is not
* allowed.
* @param link
* place where to store a pointer to the newly created link.
* @return
* 1 on success, < 0 otherwise
*/
int iso_node_new_symlink(char *name, char *dest, IsoSymlink **link);
/**
* Create a new special file node. As far as libisofs concerns,
* an special file is a block device, a character device, a FIFO (named pipe)
* or a socket. You can choose the specific kind of file you want to add
* by setting mode propertly (see man 2 stat).
*
* Note that special files are only written to image when Rock Ridge
* extensions are enabled. Moreover, a special file is just a directory entry
* in the image tree, no data is written beyond that.
*
* Owner and hidden atts are taken from parent. You can modify any of them
* later.
*
* @param name
* name for the new special file. It is not strdup() so you shouldn't use
* this reference when this function returns successfully. NULL is not
* allowed.
* @param mode
* file type and permissions for the new node. Note that you can't
* specify any kind of file here, only special types are allowed. i.e,
* S_IFSOCK, S_IFBLK, S_IFCHR and S_IFIFO are valid types; S_IFLNK,
* S_IFREG and S_IFDIR aren't.
* @param dev
* device ID, equivalent to the st_rdev field in man 2 stat.
* @param special
* place where to store a pointer to the newly created special file.
* @return
* 1 on success, < 0 otherwise
*/
int iso_node_new_special(char *name, mode_t mode, dev_t dev,
IsoSpecial **special);
/**
* Check if a given name is valid for an iso node.
*