Commit Graph

23 Commits

Author SHA1 Message Date
imp
cd1f140ae4 Per Regents of the University of Calfornia letter, remove advertising
clause.

# If I've done so improperly on a file, please let me know.
2007-01-09 00:28:16 +00:00
bde
b060e14e1b Fixed some style bugs. 2003-07-01 12:30:03 +00:00
gordon
4ad1bccf13 Add a libc function execvP that takes the search path as an arguement.
Change execvp to be a wrapper around execvP. This is necessary for some
of the /rescue pieces. It may also be more generally applicable as well.

Submitted by:	Tim Kientzle <kientzle@acm.org>
Approved by:	Silence on arch@
2003-06-29 17:33:34 +00:00
tjr
5ba4caf3bc Remove an unused variable, `sverrno', which has not been used since 1.11. 2003-01-03 23:16:55 +00:00
alfred
1ee311b26d Assume __STDC__, remove non-__STDC__ code.
Submitted by: keramida
2002-05-28 17:03:12 +00:00
obrien
21d62aab61 * Remove 'register'. (some functions had 7+ register functions...)
* Fix SCM ID's.
2002-02-01 01:08:48 +00:00
ru
95ce4d2cdc Removed duplicate VCS ID tags, as per style(9). 2001-08-13 14:06:34 +00:00
deischen
1635c221b7 Remove _THREAD_SAFE and make libc thread-safe by default by
adding (weak definitions to) stubs for some of the pthread
functions.  If the threads library is linked in, the real
pthread functions will pulled in.

Use the following convention for system calls wrapped by the
threads library:
	__sys_foo - actual system call
	_foo - weak definition to __sys_foo
	foo - weak definition to __sys_foo

Change all libc uses of system calls wrapped by the threads
library from foo to _foo.  In order to define the prototypes
for _foo(), we introduce namespace.h and un-namespace.h
(suggested by bde).  All files that need to reference these
system calls, should include namespace.h before any standard
includes, then include un-namespace.h after the standard
includes and before any local includes.  <db.h> is an exception
and shouldn't be included in between namespace.h and
un-namespace.h  namespace.h will define foo to _foo, and
un-namespace.h will undefine foo.

Try to eliminate some of the recursive calls to MT-safe
functions in libc/stdio in preparation for adding a mutex
to FILE.  We have recursive mutexes, but would like to avoid
using them if possible.

Remove uneeded includes of <errno.h> from a few files.

Add $FreeBSD$ to a few files in order to pass commitprep.

Approved by:	-arch
2001-01-24 13:01:12 +00:00
jasone
8abe2a2d86 Simplify sytem call renaming. Instead of _foo() <-- _libc_foo <-- foo(),
just use _foo() <-- foo().  In the case of a libpthread that doesn't do
call conversion (such as linuxthreads and our upcoming libpthread), this
is adequate.  In the case of libc_r, we still need three names, which are
now _thread_sys_foo() <-- _foo() <-- foo().

Convert all internal libc usage of: aio_suspend(), close(), fsync(), msync(),
nanosleep(), open(), fcntl(), read(), and write() to _foo() instead of foo().

Remove all internal libc usage of: creat(), pause(), sleep(), system(),
tcdrain(), wait(), and waitpid().

Make thread cancellation fully POSIX-compliant.

Suggested by:	deischen
2000-01-27 23:07:25 +00:00
jasone
75903038bc Add three-tier symbol naming in support of POSIX thread cancellation
points.  For library functions, the pattern is __sleep() <--
_libc_sleep() <-- sleep().  The arrows represent weak aliases.  For
system calls, the pattern is _read() <-- _libc_read() <-- read().
2000-01-12 09:23:48 +00:00
peter
76f0c923fe $Id$ -> $FreeBSD$ 1999-08-28 00:22:10 +00:00
peter
253f61532f Fix a (relatively harmless) braino. I confused myself over the for() loop
that counted the number of elements in argv.  The counter is incremented
in the next-iteration section of the loop, not the body, so at termination
it's already "counted" the element that failed the continuation test - in
this case the NULL argv terminator.

Noted by:  bde
1999-03-24 02:43:05 +00:00
peter
578ecf706c Remove last remaining references to malloc/realloc and functions that
call them.  All the execX() libc functions should be vfork() safe now.
Specifically:
- execlp() does the argument count-and-build into a vector from alloca
    (like the others) - buildargv() is no longer used (and gone).
- execvp() uses alloca/strcpy rather than strdup().
- the ENOEXEC handler uses alloca rather than malloc.
- a couple of free() calls removed - alloca works on the local stack and
    the allocations are freed on function exit (which is why buildargv
    wasn't useful - it's alloca() context would disappear on return).
Along the way:
- If alloca() fails (can it?), set errno = ENOMEM explicitly.
- The ENOEXEC recovery routine that trys again with /bin/sh appeared to
    not be terminating the new argv[] array for /bin/sh, allowing it to
    walk off the end of the list.

I dithered a bit about using alloca() even more as it's most commonly
associated with gcc.  However, standalone portable (using malloc) and
machine-specific assembler alloca implementations appear to be available
on just about all the architectures we're likely to want to port to.
alloca will be the least of our problems if ever going to another compiler.
1999-03-23 16:40:34 +00:00
des
3705233db0 Fix style issues in execl(), and make execle() vfork()-safe.
Reviewed by:	bde
Approved by:	jkh
1998-10-15 17:14:15 +00:00
des
ff71bd049b Correct braino in previous commit. I get the pointy hat again. 1998-10-14 20:23:40 +00:00
des
e907ba88d0 Make execl() vfork()-safe. This should fix potential bugs in rcp,
telnet and tip, and probably a few other apps.

Reviewed by:	bde
Approved by:	jkh
1998-10-14 18:53:36 +00:00
bde
9eee7eb270 stat() the correct file in execvp() so that the fine tuned errno handling
actually works.
1997-11-20 15:09:38 +00:00
bde
eff0c86059 Fixed searching of $PATH in execvp(). Do what sh(1) should do according
to POSIX.2.  In particular:

- don't retry for ETXTBSY.  This matches what sh(1) does.  The retry code
  was broken anyway.  It only slept for several seconds for the first few
  retries.  Then it retried without sleeping.
- don't abort the search for errors related to the path prefix, in
  particular for ENAMETOOLONG, ENOTDIR, ELOOP.  This fixes PR1487.  sh(1)
  gets this wrong in the opposite direction by never aborting the search.
- don't confuse EACCES for errors related to the path prefix with EACCES
  for errors related to the file.  sh(1) gets this wrong.
- don't return a stale errno when the search terminates normally without
  finding anything.  The errno for the last unsuccessful execve() was
  usually returned.  This gave too much precedence to pathologies in the
  last component of $PATH.  This bug is irrelevant for sh(1).

The implementation still uses the optimization/race-inhibitor of trying
to execve() things first.  POSIX.2 seems to require looking at file
permissions using stat().  We now use stat() after execve() if execve()
fails with an ambiguous error.  Trying execve() first may actually be a
pessimization, since failing execve()s are fundamentally a little slower
than stat(), and are significantly slower when a file is found but has
unsuitable permissions or points to an unsuitable interpreter.

PR:		1487
1997-10-14 07:23:16 +00:00
bde
998611f369 Fixed execvp() of an empty pathname to fail POSIXly. Previously it
attempted to exec the components of $PATH and it usually set errno
to the wrong value.

Found by:	NIST PCTS
1996-11-18 19:24:47 +00:00
bde
93424e6cf9 Fixed uninitialized variables for the '/'-in-pathname case in execvp().
Garbage in `eacces' caused the wrong errno to be set for non-EACCES errors.
Garbage in `etxtbsy' caused a semi-random retry strategy for ETXTBSY errors.

Found by:	NIST-PCTS.  gcc -Wall reported the problem, but -Wall is not
		enabled for libc.
1996-11-18 16:56:51 +00:00
jkh
c4d4a99d31 General -Wall warning cleanup, part I.
Submitted-By: Kent Vander Velden <graphix@iastate.edu>
1996-07-12 18:57:58 +00:00
bde
85651f85da Fix execl[e]. Multiple execle's failed because of bogus caching of the
pointer returned by realloc().  All callers free the pointer if the
execve fails.  Nuke the caching.  This essentially restores buildargv()
to the 1.1.5 version.  Also fix a memory leak if realloc() fails.  Also
nuke similar but non-broken caching in execvp().  malloc() should be
efficient enough.
1994-12-12 01:15:01 +00:00
rgrimes
be22b15ae2 BSD 4.4 Lite Lib Sources 1994-05-27 05:00:24 +00:00