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blob 65cf2f99f380c33d33c821409e7d297b191a8817 2492 bytes (raw)
name: gnu/packages/patches/racket-chez-scheme-bin-sh.patch 	 # note: path name is non-authoritative(*)

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From e982b6687494bf071386c67be74e57a29cf4ce00 Mon Sep 17 00:00:00 2001
From: Philip McGrath <philip@philipmcgrath.com>
Date: Wed, 24 Aug 2022 19:55:14 -0400
Subject: [PATCH] Chez Scheme: patch s_process for "/bin/sh" on Guix

If:

    1. The nonstandard but ubiquitous macro `_PATH_BSHELL` from
       <paths.h> is defined; and

    2. The path specified by `_PATH_BSHELL` exists;

then `s_process` will call `execl` with the file specified by
`_PATH_BSHELL` instead of "/bin/sh".

Checking that the path specified by `_PATH_BSHELL` exists safeguards
against obscure errors if attempting to use stand-alone executables
built by the patched Racket in non-Guix envoronments.

This patch does not change the behavior of `s_system`, which relies
on `system` from the C library.
---
 racket/src/ChezScheme/c/prim5.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/racket/src/ChezScheme/c/prim5.c b/racket/src/ChezScheme/c/prim5.c
index f5e3e345be..922421ca75 100644
--- a/racket/src/ChezScheme/c/prim5.c
+++ b/racket/src/ChezScheme/c/prim5.c
@@ -22,6 +22,12 @@
 #include <limits.h>
 #include <ctype.h>
 
+/* BEGIN PATCH for Guix */
+#ifndef WIN32
+# include <paths.h>
+#endif
+/* END PATCH for Guix */
+
 /* locally defined functions */
 static INT s_errno PROTO((void));
 static IBOOL s_addr_in_heap PROTO((uptr x));
@@ -856,6 +862,17 @@ static ptr s_process(s, stderrp) char *s; IBOOL stderrp; {
 
     INT tofds[2], fromfds[2], errfds[2];
     struct sigaction act, oint_act;
+    /* BEGIN PATCH for Guix */
+#if defined(_PATH_BSHELL)
+    struct stat guix_stat_buf;
+    char *guix_sh =
+      (0 == stat(_PATH_BSHELL, &guix_stat_buf))
+      ? _PATH_BSHELL
+      : "/bin/sh";
+#else /* _PATH_BSHELL */
+    char *guix_sh = "/bin/sh";
+#endif
+    /* END PATCH for Guix */
 
     if (pipe(tofds)) S_error("process","cannot open pipes");
     if (pipe(fromfds)) {
@@ -881,7 +898,9 @@ static ptr s_process(s, stderrp) char *s; IBOOL stderrp; {
         CLOSE(1); if (dup(fromfds[1]) != 1) _exit(1);
         CLOSE(2); if (dup(stderrp ? errfds[1] : 1) != 2) _exit(1);
         {INT i; for (i = 3; i < NOFILE; i++) (void)CLOSE(i);}
-        execl("/bin/sh", "/bin/sh", "-c", s, NULL);
+        /* BEGIN PATCH for Guix */
+        execl(guix_sh, guix_sh, "-c", s, NULL);
+        /* END PATCH for Guix */
         _exit(1) /* only if execl fails */;
         /*NOTREACHED*/
     } else {

base-commit: 9d228d16fb99c274c964e5bef93e97333888769f
-- 
2.32.0


debug log:

solving 65cf2f99f3 ...
found 65cf2f99f3 in https://git.savannah.gnu.org/cgit/guix.git

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