We want to allow builds in chroots that lack /bin/sh.  Thus, system(3)
and popen(3) need to be tweaked to use the right shell.  For the bootstrap
glibc, we just use whatever `sh' can be found in $PATH.  The final glibc
instead uses the hard-coded absolute file name of `bash'.

--- a/sysdeps/posix/system.c
+++ b/sysdeps/posix/system.c
@@ -106,8 +106,8 @@ do_system (const char *line)
       (void) UNBLOCK;
 
       /* Exec the shell.  */
-      (void) __execve (SHELL_PATH, (char *const *) new_argv, __environ);
+      (void) execvp (SHELL_NAME, (char *const *) new_argv);
       _exit (127);
     }
   else if (pid < (pid_t) 0)
     /* The fork failed.  */
--- a/libio/iopopen.c
+++ b/libio/iopopen.c
@@ -170,7 +170,7 @@ _IO_new_proc_open (fp, command, mode)
       for (p = proc_file_chain; p; p = p->next)
 	_IO_close (_IO_fileno ((_IO_FILE *) p));
 
-      _IO_execl ("/bin/sh", "sh", "-c", command, (char *) 0);
+      execlp ("sh", "sh", "-c", command, (char *) 0);
       _IO__exit (127);
     }
   _IO_close (child_end);


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<div class='path'>path: <a href='/guix/log/?id=826f188d52aa924e09b6480be334003a48742554'>root</a>/<a href='/guix/log/HACKING?id=826f188d52aa924e09b6480be334003a48742554'>HACKING</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/HACKING?id=826f188d52aa924e09b6480be334003a48742554&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
h><th class='left'>Commit message (<a href='/guix/log/gnu/bootloader.scm?id=0047f4631fdf9ef0146f462a88236885a6037d7b&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-11-17 16:03:03 +0100'>2020-11-17</span></td><td><a href='/guix/commit/gnu/bootloader.scm?id=ede4117f7f18e118003f2599f5c8e985dfbdf9a5'>gnu: bootloader: efi-bootloader-chain: Allow multiple HOOKS.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/bootloader.scm (efi-bootloader-profile): Allow multiple HOOKS.
(efi-bootloader-chain): Allow multiple HOOKS.

Signed-off-by: Danny Milosavljevic &lt;dannym@scratchpost.org&gt;
</span></span></td><td>Stefan</td></tr>
<tr><td><span title='2020-11-16 10:33:18 +0100'>2020-11-16</span></td><td><a href='/guix/commit/gnu/bootloader.scm?id=74eeb11daee906cb012f10b6bb3afd254f9ea5c2'>gnu: bootloader: Support chain loading to an EFI bootloader.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/bootloader.scm (efi-bootloader-profile): New function.
(efi-bootloader-chain): New function.

Signed-off-by: Danny Milosavljevic &lt;dannym@scratchpost.org&gt;
</span></span></td><td>Stefan</td></tr>
<tr><td><span title='2020-06-08 13:51:18 +0200'>2020-06-08</span></td><td><a href='/guix/commit/gnu/bootloader.scm?id=21acd8d6c11b85d06c82b168807b35cb7d2d0adf'>bootloader: Extend `&lt;menu-entry&gt;' for multiboot.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/bootloader.scm (&lt;menu-entry&gt;)[multiboot-kernel,multiboot-arguments,
multiboot-modules]: New fields.
[linux,initrd]: Add default value '#f'.
(menu-entry-&gt;sexp, sexp-&gt;menu-entry): Support multiboot entry.
* doc/guix.texi (Bootloader Configuration): Document them.
</span></span></td><td>Jan (janneke) Nieuwenhuizen</td></tr>
<tr><td><span title='2020-05-29 08:37:13 +0200'>2020-05-29</span></td><td><a href='/guix/commit/gnu/bootloader.scm?id=7feefb3b82186be382725ac2d6b7e9f8953e4a83'>bootloader: Add 'disk-image-installer'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/bootloader.scm (&lt;bootloader&gt;)[disk-image-installer]: New field,
(bootloader-disk-image-installer): export it.
* gnu/bootloader/grub.scm (install-grub-disk-image): New procedure ...
(grub-bootloader): ... used as "disk-image-installer" here.
(grub-efi-bootloader): set "disk-image-installer" to #f.
* gnu/system/image.scm (root-partition?, find-root-partition): Move to
"Helpers" section.
(root-partition-index): New procedure.
(system-disk-image): Honor disk-image-installer, and
use it to install the bootloader directly on the disk-image, if supported.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2019-08-30 01:33:45 +0200'>2019-08-30</span></td><td><a href='/guix/commit/gnu/bootloader.scm?id=a28cfee841e9c5ab179291d3065f1486fd065e7e'>system: Add 'bootloader-menu-entries' field to &lt;boot-parameters&gt;.</a><span class='msg-avail'>...<span class='msg-tooltip'>This allows us to keep track of the extra menu entries specified in the
OS configuration.

* gnu/system.scm (&lt;boot-parameters&gt;)[bootloader-menu-entries]: New field.
(read-boot-parameters): Initialize it.
(operating-system-boot-parameters): Likewise.
(operating-system-boot-parameters-file): Serialize it.
* gnu/bootloader.scm (menu-entry-&gt;sexp, sexp-&gt;menu-entry): New
procedures.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-08-30 01:33:45 +0200'>2019-08-30</span></td><td><a href='/guix/commit/gnu/bootloader.scm?id=ac9cd78ea9e6a3cf850b33fb2111b85e2bbf533d'>bootloader: Fix comment about 'menu-entries'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/bootloader.scm (&lt;bootloader-configuration&gt;)[menu-entries]: Fix
margin comment.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-03-24 23:06:11 +0100'>2019-03-24</span></td><td><a href='/guix/commit/gnu/bootloader.scm?id=8d058e7b1b1a409d3d9cc29c5650a98db4e78783'>bootloader: Add a 'keyboard-layout' field.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/bootloader/grub.scm (keyboard-layout-file): New procedure.
(grub-configuration-file)[keyboard-layout-file]: New variable.
[builder]: Use it.
* gnu/bootloader.scm (&lt;bootloader-configuration&gt;)[keyboard-layout]: New
field.
* doc/guix.texi (Bootloader Configuration): Document it.

Co-authored-by: nee &lt;nee-git@hidamari.blue&gt;
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-03-24 23:06:10 +0100'>2019-03-24</span></td><td><a href='/guix/commit/gnu/bootloader.scm?id=91b6873b24c205bd445844845fb44add643d0cff'>bootloader: Reindent record type definition.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/bootloader.scm (&lt;bootloader-configuration&gt;): Reindent.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-03-24 23:06:10 +0100'>2019-03-24</span></td><td><a href='/guix/commit/gnu/bootloader.scm?id=8a0e1bb12b3c22a8c9a2be17492058ca63ec7c5d'>bootloader: Remove unused 'additional-configuration' field.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/bootloader.scm (&lt;bootloader-configuration&gt;)[additional-configuration]:
Remove.
</span></span></td><td>Ludovic Courtès</td></tr>