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authorRoland McGrath <roland@gnu.org>1996-05-04 09:46:57 +0000
committerRoland McGrath <roland@gnu.org>1996-05-04 09:46:57 +0000
commit8f0c527e13b836a44fedbf6abc84e1901e2cc10d (patch)
tree2ef83b10742b3fa4e7dd89b7b55229ebf48c6818 /hurd/path-lookup.c
parent7a12c6bba750ca500009854db3a0fcdfb1ad61a7 (diff)
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Sat May 4 05:44:25 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* hurd/hurd-raise.c (_hurd_raise_signal): Pass sigcode in msg_sig_post rpc. * hurd/hurdmsg.c (_S_msg_set_environment): Use argz.h functions instead of _hurd_split_args. (_S_msg_*_exec_flags): Functions removed. (_S_msg_startup_dosync): Stub removed. Sat May 4 02:11:55 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> * sysdeps/mach/hurd/ptrace.c: Set _hurdsig_traced instead of EXEC_TRACED bit in _hurd_exec_flags. Pass sigcode arg in msg_sig_post_untraced rpc. * sysdeps/mach/hurd/access.c: Don't pass io port in auth_user_authenticate rpc. * posix/sched.h: Fix typos. * sysdeps/mach/hurd/fork.c: Use new critical section lock. Clear _hurdsig_traced instead of EXEC_TRACED. * sysdeps/stub/nanosleep.c (nanosleep): Fix typo. * wcsmbs/wcstol.c: Find strtol.c in ../stdlib. * wcsmbs/wcstof.c: Find strtod.c in ../stdlib. * wcsmbs/wcstod.c: Likewise. * wcsmbs/wcstold.c: Likewise. * wcsmbs/wcwidth.h: Find cname-lookup.h in ../wctype. * string/envz.c (envz_entry): Use const. (envz_get, envz_remove): Likewise. (envz_entry): Return char *, not const char *. * string/envz.h: Fix decl. * string/argz-create.c: Use const in prototype. * string/argz-next.c: Likewise. * sysdeps/mach/hurd/sigprocmask.c: Pass sigcode arg to msg_sig_post. * sysdeps/mach/hurd/i386/sigreturn.c: Likewise. * sysdeps/mach/hurd/sigsuspend.c: Likewise. * sysdeps/mach/hurd/kill.c: Likewise. * hurd/hurdexec.c (_hurd_exec): Use new critical section lock. * hurd/catch-exc.c (_S_catch_exception_raise): Likewise. * hurd/sigunwind.c (_hurdsig_longjmp_from_handler): Likewise. * hurd/thread-cancel.c (hurd_thread_cancel, hurd_check_cancel): Likewise. * sysdeps/mach/hurd/jmp-unwind.c (_longjmp_unwind): Likewise. * sysdeps/mach/hurd/sigaction.c: Likewise. * sysdeps/mach/hurd/errnos.awk: Don't use ARGV in comment; it can change meaninglessly. * hurd/hurd/signal.h (struct hurd_sigstate): Replace critical section flag with a spin lock. (_hurd_critical_section_lock): Use spin_try_lock on that to see if we get it. No need to take SS->lock at all. (_hurd_critical_section_unlock): Unlock SS->critical_section_lock instead of clearing the old flag member. * hurd/hurdsig.c (_hurd_internal_post_signal): Use spin_lock_locked to test the critical section state. * hurd/hurdinit.c (_hurd_init): Set _hurdsig_traced from the intarray. * hurd/hurdkill.c (_hurd_sig_post): Pass 0 sigcode in msg_sig_post. * hurd/hurdsig.c (_hurd_internal_post_signal): Test _hurdsig_traced instead of testing (_hurd_exec_flags & EXEC_TRACED). (_S_msg_sig_post): Take sigcode arg and pass it through. (_S_msg_sig_post_untraced): Likewise. (reauth_proc): Don't pass proc port in auth_user_authenticate. * hurd/setauth.c (_hurd_setauth): Don't pass object ports in auth_user_authenticate RPCs, just the one-off rendezvous port. * hurd/dtable.c (reauth_dtable): Likewise. * hurd/hurdlookup.c (__hurd_file_name_lookup_retry): Likewise. * hurd/hurdexec.c (_hurd_exec): Pass 0 flags to file_exec. Pass sigcode arg to msg_sig_post. * string/argz.h (argz_create): Use const in prototype. * hurd/hurdinit.c (_hurd_proc_init): Test _hurdsig_traced instead of testing (_hurd_exec_flags & EXEC_TRACED). Pass sigcode arg to msg_sig_post. * hurd/hurd.h: Declare _hurdsig_traced. * string/argz.h (__argz_next): Cast ENTRY before returning it. * hurd/hurd/signal.h (_hurd_critical_section_unlock): Pass sigcode arg to msg_sig_post. * hurd/path-lookup.c: New file. * hurd/Makefile (routines): Add path-lookup. * hurd/hurd/lookup.h: Declare file_name_path_scan, hurd_file_name_path_lookup. * hurd/hurd.h: Declare file_name_path_lookup. * sysdeps/mach/hurd/select.c: The io_select rpc no longer has a TAG_ID argument. Instead, use a separate reply port for each RPC and put them all in a port set to wait for slow replies.
Diffstat (limited to 'hurd/path-lookup.c')
-rw-r--r--hurd/path-lookup.c120
1 files changed, 120 insertions, 0 deletions
diff --git a/hurd/path-lookup.c b/hurd/path-lookup.c
new file mode 100644
index 0000000000..9e0fff4927
--- /dev/null
+++ b/hurd/path-lookup.c
@@ -0,0 +1,120 @@
+/* Filename lookup using a search path
+
+ Copyright (C) 1995, 1996 Free Software Foundation, Inc.
+
+ Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <string.h>
+#include <hurd.h>
+#include <hurd/lookup.h>
+
+/* If FILE_NAME contains a '/', or PATH is NULL, call FUN with FILE_NAME, and
+ return the result (if PREFIXED_NAME is non-NULL, setting *PREFIXED_NAME to
+ NULL). Otherwise, call FUN repeatedly with FILE_NAME prefixed with each
+ successive `:' separated element of PATH, returning whenever FUN returns
+ 0 (if PREFIXED_NAME is non-NULL, setting *PREFIXED_NAME to the resulting
+ prefixed path). If FUN never returns 0, return the first non-ENOENT
+ return value, or ENOENT if there is none. */
+error_t
+file_name_path_scan (const char *file_name, const char *path,
+ error_t (*fun)(const char *name),
+ char **prefixed_name)
+{
+ if (path == NULL || index (file_name, '/'))
+ {
+ if (prefixed_name)
+ *prefixed_name = 0;
+ return (*fun)(file_name);
+ }
+ else
+ {
+ error_t real_err = 0;
+ size_t file_name_len = strlen (file_name);
+
+ for (;;)
+ {
+ error_t err;
+ const char *next = index (path, ':') ?: path + strlen (path);
+ size_t pfx_len = next - path;
+ char pfxed_name[pfx_len + 2 + file_name_len + 1];
+
+ if (pfx_len == 0)
+ pfxed_name[pfx_len++] = '.';
+ else
+ bcopy (path, pfxed_name, pfx_len);
+ if (pfxed_name[pfx_len - 1] != '/')
+ pfxed_name[pfx_len++] = '/';
+ bcopy (file_name, pfxed_name + pfx_len, file_name_len + 1);
+
+ err = (*fun)(pfxed_name);
+ if (err == 0)
+ {
+ if (prefixed_name)
+ *prefixed_name = strdup (pfxed_name);
+ return 0;
+ }
+ if (!real_err && err != ENOENT)
+ real_err = err;
+
+ if (*next == '\0')
+ return real_err ?: ENOENT;
+ else
+ path = next + 1;
+ }
+ }
+}
+
+/* Lookup FILE_NAME and return the node opened with FLAGS & MODE in result
+ (see hurd_file_name_lookup for details), but a simple filename (without
+ any directory prefixes) will be consectutively prefixed with the pathnames
+ in the `:' separated list PATH until one succeeds in a successful lookup.
+ If none succeed, then the first error that wasn't ENOENT is returned, or
+ ENOENT if no other errors were returned. If PREFIXED_NAME is non-NULL,
+ then if RESULT is looked up directly, *PREFIXED_NAME is set to NULL, and
+ if it is looked up using a prefix from PATH, *PREFIXED_NAME is set to
+ malloced storage containing the prefixed name. */
+error_t
+hurd_file_name_path_lookup (error_t (*use_init_port)
+ (int which,
+ error_t (*operate) (mach_port_t)),
+ file_t (*get_dtable_port) (int fd),
+ const char *file_name, const char *path,
+ int flags, mode_t mode,
+ file_t *result, char **prefixed_name)
+{
+ error_t lookup (const char *name)
+ {
+ return
+ __hurd_file_name_lookup (use_init_port, get_dtable_port,
+ name, flags, mode, result);
+ }
+ return file_name_path_scan (file_name, path, lookup, prefixed_name);
+}
+
+file_t
+file_name_path_lookup (const char *file_name, const char *path,
+ int flags, mode_t mode, char **prefixed_name)
+{
+ error_t err;
+ file_t result;
+
+ err = hurd_file_name_path_lookup (&_hurd_ports_use, &__getdport,
+ file_name, path, flags, mode,
+ &result, prefixed_name);
+
+ return err ? (__hurd_fail (err), MACH_PORT_NULL) : result;
+}