diff options
-rw-r--r-- | guix/build/syscalls.scm | 78 |
1 files changed, 63 insertions, 15 deletions
diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm index 9c082b4352..549612fa3c 100644 --- a/guix/build/syscalls.scm +++ b/guix/build/syscalls.scm @@ -21,6 +21,7 @@ (define-module (guix build syscalls) #:use-module (system foreign) + #:use-module (system base target) ;for cross-compilation support #:use-module (rnrs bytevectors) #:autoload (ice-9 binary-ports) (get-bytevector-n) #:use-module (srfi srfi-1) @@ -824,28 +825,75 @@ system to PUT-OLD." ;;; Opendir & co. ;;; -(define-c-struct %struct-dirent-header - sizeof-dirent-header +(define (file-type->symbol type) + ;; Convert TYPE to symbols like 'stat:type' does. + (cond ((= type DT_REG) 'regular) + ((= type DT_LNK) 'symlink) + ((= type DT_DIR) 'directory) + ((= type DT_FIFO) 'fifo) + ((= type DT_CHR) 'char-special) + ((= type DT_BLK) 'block-special) + ((= type DT_SOCK) 'socket) + (else 'unknown))) + +;; 'struct dirent64' for GNU/Linux. +(define-c-struct %struct-dirent-header/linux + sizeof-dirent-header/linux (lambda (inode offset length type name) - ;; Convert TYPE to symbols like 'stat:type' does. - (let ((type (cond ((= type DT_REG) 'regular) - ((= type DT_LNK) 'symlink) - ((= type DT_DIR) 'directory) - ((= type DT_FIFO) 'fifo) - ((= type DT_CHR) 'char-special) - ((= type DT_BLK) 'block-special) - ((= type DT_SOCK) 'socket) - (else 'unknown)))) - `((type . ,type) - (inode . ,inode)))) - read-dirent-header - write-dirent-header! + `((type . ,(file-type->symbol type)) + (inode . ,inode))) + read-dirent-header/linux + write-dirent-header!/linux (inode int64) (offset int64) (length unsigned-short) (type uint8) (name uint8)) ;first byte of 'd_name' +;; 'struct dirent64' for GNU/Hurd. +(define-c-struct %struct-dirent-header/hurd + sizeof-dirent-header/hurd + (lambda (inode length type name-length name) + `((type . ,(file-type->symbol type)) + (inode . ,inode))) + read-dirent-header/hurd + write-dirent-header!/hurd + (inode int64) + (length unsigned-short) + (type uint8) + (namelen uint8) + (name uint8)) + +(define-syntax define-generic-identifier + (syntax-rules (gnu/linux gnu/hurd =>) + "Define a generic identifier that adjust to the current GNU variant." + ((_ id (gnu/linux => linux) (gnu/hurd => hurd)) + (define-syntax id + (lambda (s) + (syntax-case s () + ((_ args (... ...)) + (if (string-contains (or (target-type) %host-type) + "linux") + #'(linux args (... ...)) + #'(hurd args (... ...)))) + (_ + (if (string-contains (or (target-type) %host-type) + "linux") + #'linux + #'hurd)))))))) + +(define-generic-identifier read-dirent-header + (gnu/linux => read-dirent-header/linux) + (gnu/hurd => read-dirent-header/hurd)) + +(define-generic-identifier %struct-dirent-header + (gnu/linux => %struct-dirent-header/linux) + (gnu/hurd => %struct-dirent-header/hurd)) + +(define-generic-identifier sizeof-dirent-header + (gnu/linux => sizeof-dirent-header/linux) + (gnu/hurd => sizeof-dirent-header/hurd)) + ;; Constants for the 'type' field, from <dirent.h>. (define DT_UNKNOWN 0) (define DT_FIFO 1) |