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authorLudovic Courtès <ludo@gnu.org>2018-12-16 15:36:48 +0100
committerLudovic Courtès <ludo@gnu.org>2018-12-16 16:28:07 +0100
commit92391eaf8df8fecbf6844c57ce5bcd3014eb5d28 (patch)
tree277791478f65b915ee3dc3e3b901154e380ffd3c /gnu/packages/patches/glibc-hurd-magic-pid.patch
parent8327e733966cc4a93dfaadd1a761ca1088078baa (diff)
gnu: glibc: Add patch implementing "pid/…" magic lookup on the Hurd.
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.
Diffstat (limited to 'gnu/packages/patches/glibc-hurd-magic-pid.patch')
-rw-r--r--gnu/packages/patches/glibc-hurd-magic-pid.patch190
1 files changed, 190 insertions, 0 deletions
diff --git a/gnu/packages/patches/glibc-hurd-magic-pid.patch b/gnu/packages/patches/glibc-hurd-magic-pid.patch
new file mode 100644
index 0000000000..a6849f7d35
--- /dev/null
+++ b/gnu/packages/patches/glibc-hurd-magic-pid.patch
@@ -0,0 +1,190 @@
+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)