[07a3253d] | 1 | /* |
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[a5305f6b] | 2 | * IMFS_link |
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[07a3253d] | 3 | * |
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| 4 | * The following rouine creates a new link node under parent with the |
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| 5 | * name given in name. The link node is set to point to the node at |
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| 6 | * to_loc. |
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| 7 | * |
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[9ba0e55] | 8 | * COPYRIGHT (c) 1989-2010. |
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[07a3253d] | 9 | * On-Line Applications Research Corporation (OAR). |
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| 10 | * |
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| 11 | * The license and distribution terms for this file may be |
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| 12 | * found in the file LICENSE in this distribution or at |
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[cf0539b1] | 13 | * http://www.rtems.com/license/LICENSE. |
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[07a3253d] | 14 | * |
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| 15 | * $Id$ |
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| 16 | */ |
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| 17 | |
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[d6b1d73] | 18 | #if HAVE_CONFIG_H |
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| 19 | #include "config.h" |
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| 20 | #endif |
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| 21 | |
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[07a3253d] | 22 | #include <errno.h> |
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| 23 | #include "imfs.h" |
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[c058578] | 24 | #include <rtems/libio_.h> |
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[b2709481] | 25 | #include <rtems/seterr.h> |
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[07a3253d] | 26 | |
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| 27 | int IMFS_link( |
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| 28 | rtems_filesystem_location_info_t *to_loc, /* IN */ |
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| 29 | rtems_filesystem_location_info_t *parent_loc, /* IN */ |
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| 30 | const char *token /* IN */ |
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| 31 | ) |
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| 32 | { |
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| 33 | IMFS_types_union info; |
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| 34 | IMFS_jnode_t *new_node; |
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[3cf8394] | 35 | char new_name[ IMFS_NAME_MAX + 1 ]; |
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[07a3253d] | 36 | int i; |
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| 37 | |
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| 38 | /* |
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| 39 | * Verify this node can be linked to. |
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| 40 | */ |
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| 41 | info.hard_link.link_node = to_loc->node_access; |
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| 42 | if ( info.hard_link.link_node->st_nlink >= LINK_MAX ) |
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[b2709481] | 43 | rtems_set_errno_and_return_minus_one( EMLINK ); |
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[a5305f6b] | 44 | |
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[07a3253d] | 45 | /* |
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| 46 | * Remove any separators at the end of the string. |
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| 47 | */ |
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[7baa484] | 48 | IMFS_get_token( token, strlen( token ), new_name, &i ); |
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[07a3253d] | 49 | |
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| 50 | /* |
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| 51 | * Create a new link node. |
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[9ba0e55] | 52 | * |
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[cb4e992] | 53 | * NOTE: Coverity Id 19 reports this as a leak |
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| 54 | * While technically not a leak, it indicated that IMFS_create_node |
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| 55 | * was ONLY passed a NULL when we created the root node. We |
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| 56 | * added a new IMFS_create_root_node() so this path no longer |
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| 57 | * existed. The result was simpler code which should not have |
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| 58 | * this path. |
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[07a3253d] | 59 | */ |
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| 60 | new_node = IMFS_create_node( |
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| 61 | parent_loc, |
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| 62 | IMFS_HARD_LINK, |
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[a5305f6b] | 63 | new_name, |
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[07a3253d] | 64 | ( S_IFLNK | ( S_IRWXU | S_IRWXG | S_IRWXO )), |
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| 65 | &info |
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| 66 | ); |
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| 67 | |
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| 68 | if ( !new_node ) |
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[b2709481] | 69 | rtems_set_errno_and_return_minus_one( ENOMEM ); |
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[07a3253d] | 70 | |
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| 71 | /* |
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| 72 | * Increment the link count of the node being pointed to. |
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| 73 | */ |
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| 74 | info.hard_link.link_node->st_nlink++; |
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| 75 | IMFS_update_ctime( info.hard_link.link_node ); |
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| 76 | |
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| 77 | return 0; |
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| 78 | } |
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