mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-24 21:38:07 -05:00
92391eaf8d
This patch is missing from glibc 2.28 and is needed to support /proc/self lookup when using the Hurd's procfs, which in turn is needed for our 'guile-relocatable.patch'. See <https://lists.gnu.org/archive/html/bug-hurd/2018-12/msg00024.html>. * gnu/packages/patches/glibc-hurd-magic-pid.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/base.scm (glibc)[arguments]: Add 'apply-hurd-patch' phase. [native-inputs]: Add "hurd-magic-pid-patch" input. * gnu/packages/cross-base.scm (cross-libc)[arguments]: Duplicate 'apply-hurd-patch' phase.
190 lines
5.1 KiB
Diff
190 lines
5.1 KiB
Diff
This patch implements "magic" lookup for "pid/…", as used when looking up
|
|
/proc/self.
|
|
|
|
The patch comes from the 't/magic-pid' branch
|
|
at <https://git.savannah.gnu.org/cgit/hurd/glibc.git>. It squashes
|
|
commit 392e52286a302ca6157fbd221295e64ab6b6d8ba (by Justus Winter)
|
|
and commit 392e52286a302ca6157fbd221295e64ab6b6d8ba (a subsequent fix by
|
|
Samuel Thibault).
|
|
|
|
From: Justus Winter <4winter@informatik.uni-hamburg.de>
|
|
Subject: [PATCH] hurd: Handle `pid' magical lookup retry
|
|
|
|
* hurd/lookup-retry.c: Handle `pid' magical lookup
|
|
retry.
|
|
|
|
diff --git a/hurd/lookup-retry.c b/hurd/lookup-retry.c
|
|
index aee2ba8f93..6ed8de1653 100644
|
|
--- a/hurd/lookup-retry.c
|
|
+++ b/hurd/lookup-retry.c
|
|
@@ -25,6 +25,7 @@
|
|
#include <string.h>
|
|
#include <_itoa.h>
|
|
#include <eloop-threshold.h>
|
|
+#include <unistd.h>
|
|
|
|
/* Translate the error from dir_lookup into the error the user sees. */
|
|
static inline error_t
|
|
@@ -59,6 +60,7 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
|
|
error_t err;
|
|
char *file_name;
|
|
int nloops;
|
|
+ file_t lastdir = MACH_PORT_NULL;
|
|
|
|
error_t lookup_op (file_t startdir)
|
|
{
|
|
@@ -107,14 +109,15 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
|
|
{
|
|
case FS_RETRY_REAUTH:
|
|
if (err = reauthenticate (*result))
|
|
- return err;
|
|
+ goto out;
|
|
/* Fall through. */
|
|
|
|
case FS_RETRY_NORMAL:
|
|
if (nloops++ >= __eloop_threshold ())
|
|
{
|
|
__mach_port_deallocate (__mach_task_self (), *result);
|
|
- return ELOOP;
|
|
+ err = ELOOP;
|
|
+ goto out;
|
|
}
|
|
|
|
/* An empty RETRYNAME indicates we have the final port. */
|
|
@@ -174,7 +177,7 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
|
|
|
|
if (err)
|
|
__mach_port_deallocate (__mach_task_self (), *result);
|
|
- return err;
|
|
+ goto out;
|
|
}
|
|
|
|
startdir = *result;
|
|
@@ -189,7 +192,10 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
|
|
if (*result != MACH_PORT_NULL)
|
|
__mach_port_deallocate (__mach_task_self (), *result);
|
|
if (nloops++ >= __eloop_threshold ())
|
|
- return ELOOP;
|
|
+ {
|
|
+ err = ELOOP;
|
|
+ goto out;
|
|
+ }
|
|
file_name = &retryname[1];
|
|
break;
|
|
|
|
@@ -208,7 +214,8 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
|
|
(*end != '/' && *end != '\0'))
|
|
{
|
|
errno = save;
|
|
- return ENOENT;
|
|
+ err = ENOENT;
|
|
+ goto out;
|
|
}
|
|
if (! get_dtable_port)
|
|
err = EGRATUITOUS;
|
|
@@ -226,9 +233,12 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
|
|
}
|
|
errno = save;
|
|
if (err)
|
|
- return err;
|
|
+ goto out;
|
|
if (*end == '\0')
|
|
- return 0;
|
|
+ {
|
|
+ err = 0;
|
|
+ goto out;
|
|
+ }
|
|
else
|
|
{
|
|
/* Do a normal retry on the remaining components. */
|
|
@@ -255,9 +265,12 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
|
|
if (err = __host_info (__mach_host_self (), HOST_BASIC_INFO,
|
|
(integer_t *) &hostinfo,
|
|
&hostinfocnt))
|
|
- return err;
|
|
+ goto out;
|
|
if (hostinfocnt != HOST_BASIC_INFO_COUNT)
|
|
- return EGRATUITOUS;
|
|
+ {
|
|
+ err = EGRATUITOUS;
|
|
+ goto out;
|
|
+ }
|
|
p = _itoa (hostinfo.cpu_subtype, &retryname[8], 10, 0);
|
|
*--p = '/';
|
|
p = _itoa (hostinfo.cpu_type, &retryname[8], 10, 0);
|
|
@@ -293,10 +306,11 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
|
|
}
|
|
|
|
case '\0':
|
|
- return opentty (result);
|
|
+ err = opentty (result);
|
|
+ goto out;
|
|
case '/':
|
|
if (err = opentty (&startdir))
|
|
- return err;
|
|
+ goto out;
|
|
strcpy (retryname, &retryname[4]);
|
|
break;
|
|
default:
|
|
@@ -306,14 +320,48 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
|
|
goto bad_magic;
|
|
break;
|
|
|
|
+ case 'p':
|
|
+ if (retryname[1] == 'i' && retryname[2] == 'd' &&
|
|
+ (retryname[3] == '/' || retryname[3] == 0))
|
|
+ {
|
|
+ char *p, buf[1024]; /* XXX */
|
|
+ size_t len;
|
|
+ p = _itoa (__getpid (), &buf[sizeof buf], 10, 0);
|
|
+ len = &buf[sizeof buf] - p;
|
|
+ memcpy (buf, p, len);
|
|
+ strcpy (buf + len, &retryname[3]);
|
|
+ strcpy (retryname, buf);
|
|
+
|
|
+ /* Do a normal retry on the remaining components. */
|
|
+ __mach_port_mod_refs (__mach_task_self (), lastdir,
|
|
+ MACH_PORT_RIGHT_SEND, 1);
|
|
+ startdir = lastdir;
|
|
+ file_name = retryname;
|
|
+ }
|
|
+ else
|
|
+ goto bad_magic;
|
|
+ break;
|
|
+
|
|
default:
|
|
bad_magic:
|
|
- return EGRATUITOUS;
|
|
+ err = EGRATUITOUS;
|
|
+ goto out;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
- return EGRATUITOUS;
|
|
+ err = EGRATUITOUS;
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ if (MACH_PORT_VALID (*result) && *result != lastdir)
|
|
+ {
|
|
+ if (MACH_PORT_VALID (lastdir))
|
|
+ __mach_port_deallocate (__mach_task_self (), lastdir);
|
|
+
|
|
+ lastdir = *result;
|
|
+ __mach_port_mod_refs (__mach_task_self (), lastdir,
|
|
+ MACH_PORT_RIGHT_SEND, 1);
|
|
}
|
|
|
|
if (startdir != MACH_PORT_NULL)
|
|
@@ -326,6 +374,10 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
|
|
err = (*use_init_port) (dirport, &lookup_op);
|
|
} while (! err);
|
|
|
|
+out:
|
|
+ if (MACH_PORT_VALID (lastdir))
|
|
+ __mach_port_deallocate (__mach_task_self (), lastdir);
|
|
+
|
|
return err;
|
|
}
|
|
weak_alias (__hurd_file_name_lookup_retry, hurd_file_name_lookup_retry)
|