diff options
author | Ulrich Drepper <drepper@redhat.com> | 1997-11-13 00:21:19 +0000 |
---|---|---|
committer | Ulrich Drepper <drepper@redhat.com> | 1997-11-13 00:21:19 +0000 |
commit | fe0ec73edb48eff3785f29ddbac75cae5f8b361b (patch) | |
tree | d862765d3e48bfde1ee82de94b4e4f039ee7f205 /sysdeps/unix/sysv/linux/getcwd.c | |
parent | cc3fa755128c70f8afc2d604936f33e4d7d652d8 (diff) | |
download | glibc-fe0ec73edb48eff3785f29ddbac75cae5f8b361b.tar.gz glibc-fe0ec73edb48eff3785f29ddbac75cae5f8b361b.tar.xz glibc-fe0ec73edb48eff3785f29ddbac75cae5f8b361b.zip |
Update. cvs/libc-ud-971112
1997-11-13 01:07 Ulrich Drepper <drepper@cygnus.com> * manual/arith.texi: Update documentation according to most recent ISO C 9X draft. Document fma, fdim, fmin, and fmax. * manual/math.texi: Allow multiple defitino of mul etc. * math/complex.h (I): Define using _Complex_U not _Imaginary_I. * math/libm-test.c: Add tests for fma. * math/math.h: Describe DECIMAL_DIG macro. Pretty print. * sysdeps/alpha/fpu/bits/mathdef.h: Define INFINITY as of type float. Define DECIMAL_DIG. * sysdeps/generic/bits/mathdef.h: Likewise. * sysdeps/i386/bits/mathdef.h: Likewise. * sysdeps/m68k/fpu/bits/mathdef.h: Likewise. * sysdeps/powerpc/bits/mathdef.h: Likewise. * sysdeps/sparc/fpu/bits/mathdef.h: Likewise. * sysdeps/ieee754/bits/nan.h: Define NAN as of type float. * sysdeps/m68k/bits/nan.h. Likewise. Remove NANF and NANL. 1997-11-12 17:50 Ulrich Drepper <drepper@cygnus.com> * sunrpc/xcrypt.c: Don't process #ident preprocessor instruction. Reported by Philip Blundell <pb@nexus.co.uk>. * string/strndup.c: Use K&R like definition. * sysdeps/unix/sysv/linux/getcwd.c: New file. Use kernel information instead of longish search for the name. * sysdeps/posix/getcwd.c: Add support for use of the code as a backup solution. 1997-11-12 15:31 Philip Blundell <pb@nexus.co.uk> * sysdeps/unix/sysv/linux/arm/sysdep.h (SYS_ify): Don't add SWI_BASE in twice. * sysdeps/unix/sysv/linux/arm/profil-counter.h (profil_counter): Use correct name to access PC. * sysdeps/unix/arm/sysdep.S: Include <bits/errno.h> not <errnos.h>. * sysdeps/generic/bits/types.h: Add __ino64_t and __off64_t. * sysdeps/generic/bits/stat.h: Add struct stat64. 1997-11-12 16:08 Ulrich Drepper <drepper@cygnus.com> * intl/loadmsgcat.c [_LIBC] (fstat): Don't define as __fstat since now we have a definition as _fxstat. * libio/fileops.c: Likewise. * libio/oldfileops.c: Likewise. Reported by Andreas Jaeger <aj@arthur.rhein-neckar.de>. 1997-11-12 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sysdeps/wordsize-32/inttypes.h (SIG_ATOMIC_MAX): Correct value. * sysdeps/wordsize-64/inttypes.h (SIG_ATOMIC_MAX): Likewise. 1997-11-11 Paul Eggert <eggert@twinsun.com> Add overflow checking for 64-bit time_t and 32-bit int. * time/time.h (__offtime): Now returns int. * time/offtime.c (__offtime): Return nonzero if successful; check for tm_year overflow. (DIV): New macro. (LEAPS_THRU_END_OF): Handle negative years correctly. * time/tzset.c (__tz_convert): Return NULL if offtime cannot convert. * time/mktime.c (ranged_convert): New function. (ydhms_tm_diff): Return nonzero if TP is null. (__mktime_internal): Handle cases correctly even if they are near or past the limits of time_t values that can be broken down to struct tm. (print_tm, check_result, main): Diagnose localtime failures. * manual/time.texi: Document the fact that localtime returns 0 if the time can't be represented. 1997-11-12 06:03 Ulrich Drepper <drepper@cygnus.com> * time/strftime.c (memset_space, memset_zero): Use MEMPCPY, not mempcpy. Patch by Ken'ichi Handa <handa@etl.go.jp>. * manual/time.texi: Document %F and %f format for strftime. * manual/arith.texi: Document copysign, nextafter and nan. 1997-11-06 Andreas Jaeger <aj@arthur.rhein-neckar.de> * test-installation.pl: New file. Tests for some installation problems.
Diffstat (limited to 'sysdeps/unix/sysv/linux/getcwd.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/getcwd.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/getcwd.c b/sysdeps/unix/sysv/linux/getcwd.c new file mode 100644 index 0000000000..eea0b469e1 --- /dev/null +++ b/sysdeps/unix/sysv/linux/getcwd.c @@ -0,0 +1,94 @@ +/* Determine current working directory. Linux version. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <limits.h> +#include <stdlib.h> +#include <unistd.h> + +/* #define NDEBUG 1 */ +#include <assert.h> + +/* The "proc" filesystem provides an easy method to retrieve the value. + For each process, the corresponding directory contains a symbolic link + named `cwd'. Reading the content of this link immediate gives us the + information. But we have to take care for systems which do not have + the proc filesystem mounted. Use the POSIX implementation in this case. */ +static char *generic_getcwd (char *buf, size_t size); + +char * +__getcwd (char *buf, size_t size) +{ + int save_errno; + char *path; + int n; + char *result; + + if (size == 0) + { + if (buf != NULL) + { + __set_errno (EINVAL); + return NULL; + } + + size = PATH_MAX + 1; + } + + if (buf != NULL) + path = buf; + else + { + path = malloc (size); + if (path == NULL) + return NULL; + } + + save_errno = errno; + n = __readlink ("/proc/self/cwd", path, size); + if (n != -1) + { + if (n >= size) + { + /* This should never happen when we allocate the buffer here. */ + assert (buf == NULL); + __set_errno (ERANGE); + return NULL; + } + path[n] = '\0'; + return buf ?: (char *) realloc (path, (size_t) n + 1); + } + + /* Something went wrong. Restore the error number and use the generic + version. */ + __set_errno (save_errno); + result = generic_getcwd (path, size); + + if (result == NULL && buf == NULL) + free (path); + + return result; +} +weak_alias (__getcwd, getcwd) + +/* Get the code for the generic version. */ +#define GETCWD_STORAGE_CLASS static +#define __getcwd generic_getcwd +#include <sysdeps/posix/getcwd.c> |