diff options
| -rw-r--r-- | gnu/packages/ld-wrapper.scm | 46 |
1 files changed, 32 insertions, 14 deletions
diff --git a/gnu/packages/ld-wrapper.scm b/gnu/packages/ld-wrapper.scm index cc533f5464..9d35a7b040 100644 --- a/gnu/packages/ld-wrapper.scm +++ b/gnu/packages/ld-wrapper.scm @@ -82,27 +82,45 @@ exec @GUILE@ -c "(load-compiled \"@SELF@.go\") (apply $main (cdr (command-line)) ;; Whether to emit debugging output. (getenv "GUIX_LD_WRAPPER_DEBUG")) -(define (pure-file-name? file) - ;; Return #t when FILE is the name of a file either within the store - ;; (possibly via a symlink) or within the build directory. +(define (readlink* file) + ;; Call 'readlink' until the result is not a symlink. (define %max-symlink-depth 50) (let loop ((file file) (depth 0)) + (catch 'system-error + (lambda () + (if (>= depth %max-symlink-depth) + file + (loop (readlink file) (+ depth 1)))) + (lambda args + (if (= EINVAL (system-error-errno args)) + file + (apply throw args)))))) + +(define (dereference-symlinks file) + ;; Same as 'readlink*' but return FILE if the symlink target is invalid or + ;; FILE does not exist. + (catch 'system-error + (lambda () + ;; When used from a user environment, FILE may refer to + ;; ~/.guix-profile/lib/libfoo.so, which is itself a symlink to the + ;; store. Check whether this is the case. + (readlink* file)) + (lambda args + (if (= ENOENT (system-error-errno args)) + file + (apply throw args))))) + +(define (pure-file-name? file) + ;; Return #t when FILE is the name of a file either within the store + ;; (possibly via a symlink) or within the build directory. + (let ((file (dereference-symlinks file))) (or (not (string-prefix? "/" file)) (string-prefix? %store-directory file) (string-prefix? %temporary-directory file) - (if %build-directory - (string-prefix? %build-directory file) - - ;; When used from a user environment, FILE may refer to - ;; ~/.guix-profile/lib/libfoo.so, which is itself a symlink to the - ;; store. Check whether this is the case. - (let ((s (false-if-exception (lstat file)))) - (and s - (eq? 'symlink (stat:type s)) - (< depth %max-symlink-depth) - (loop (readlink file) (+ 1 depth)))))))) + (and %build-directory + (string-prefix? %build-directory file))))) (define (shared-library? file) ;; Return #t when FILE denotes a shared library. |