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utils: Change 'wrap-program' to preserve the original argv[0].

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Suggested by Mark H Weaver <mhw@netris.org>
in <http://bugs.gnu.org/19138>.

* guix/build/utils.scm (wrap-program): Change wrapper to use "exec -a
  PROG" instead of just "exec".
This commit is contained in:
Ludovic Courtès 2014-12-14 11:54:12 +01:00
parent c809ec94d1
commit 2ed11b3a3e
1 changed files with 4 additions and 2 deletions
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6
guix/build/utils.scm
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@ -762,7 +762,7 @@ contents:
#!location/of/bin/bash #!location/of/bin/bash
export PATH=\"/gnu/.../bar/bin\" export PATH=\"/gnu/.../bar/bin\"
export CERT_PATH=\"$CERT_PATH${CERT_PATH:+:}/gnu/.../baz/certs:/qux/certs\" export CERT_PATH=\"$CERT_PATH${CERT_PATH:+:}/gnu/.../baz/certs:/qux/certs\"
exec location/of/.foo-real exec -a location/of/foo location/of/.foo-real \"$@\"
This is useful for scripts that expect particular programs to be in $PATH, for This is useful for scripts that expect particular programs to be in $PATH, for
programs that expect particular shared libraries to be in $LD_LIBRARY_PATH, or programs that expect particular shared libraries to be in $LD_LIBRARY_PATH, or
@ -786,6 +786,7 @@ the previous wrapper."
(copy-file prog prog-real) (copy-file prog prog-real)
prog-real) prog-real)
(wrapper-file-name number))) (wrapper-file-name number)))
(let* ((number (next-wrapper-number)) (let* ((number (next-wrapper-number))
(target (wrapper-target number)) (target (wrapper-target number))
(wrapper (wrapper-file-name (1+ number))) (wrapper (wrapper-file-name (1+ number)))
@ -815,10 +816,11 @@ the previous wrapper."
(with-output-to-file prog-tmp (with-output-to-file prog-tmp
(lambda () (lambda ()
(format #t (format #t
"#!~a~%~a~%exec \"~a\" \"$@\"~%" "#!~a~%~a~%exec -a \"~a\" \"~a\" \"$@\"~%"
(which "bash") (which "bash")
(string-join (map export-variable vars) (string-join (map export-variable vars)
"\n") "\n")
(canonicalize-path prog)
(canonicalize-path target)))) (canonicalize-path target))))
(chmod prog-tmp #o755) (chmod prog-tmp #o755)