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author | Mark H Weaver <mhw@netris.org> | 2013-03-28 05:09:53 -0400 |
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committer | Mark H Weaver <mhw@netris.org> | 2013-03-28 05:09:53 -0400 |
commit | 26d148066f9cb20e395a7dc4fefdf2e2ef0b2fb0 (patch) | |
tree | 40f13bc6355adb822bb8cd01fee5bcd9fd5430f9 /lib/putenv.c | |
parent | 8ae26afefee947c71314733c419519fb616bf36d (diff) | |
parent | 579127cce488ce208d62e68e679e34fbbdc17367 (diff) | |
download | guile-26d148066f9cb20e395a7dc4fefdf2e2ef0b2fb0.tar.gz |
Merge remote-tracking branch 'origin/stable-2.0'
Conflicts:
configure.ac
libguile/deprecated.c
libguile/deprecated.h
libguile/filesys.h
libguile/fluids.c
libguile/fports.c
libguile/gc.c
libguile/guile.c
libguile/numbers.c
libguile/objcodes.c
libguile/r6rs-ports.c
libguile/smob.c
libguile/socket.c
libguile/threads.h
module/language/scheme/decompile-tree-il.scm
module/language/tree-il/peval.scm
test-suite/tests/syncase.test
Diffstat (limited to 'lib/putenv.c')
-rw-r--r-- | lib/putenv.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/lib/putenv.c b/lib/putenv.c index eb3fae375..2abc6acff 100644 --- a/lib/putenv.c +++ b/lib/putenv.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1991, 1994, 1997-1998, 2000, 2003-2012 Free Software +/* Copyright (C) 1991, 1994, 1997-1998, 2000, 2003-2013 Free Software Foundation, Inc. NOTE: The canonical source of this file is maintained with the GNU C @@ -115,6 +115,37 @@ putenv (char *string) if (*ep == NULL) { +#if HAVE__PUTENV + /* Rely on _putenv to allocate the new environment. If other + parts of the application use _putenv, the !HAVE__PUTENV code + would fight over who owns the environ vector, causing a crash. */ + if (name_end[1]) + return _putenv (string); + else + { + /* _putenv ("NAME=") unsets NAME, so invoke _putenv ("NAME=x") + to allocate the environ vector and then replace the new + entry with "NAME=". */ + int putenv_result, putenv_errno; + char *name_x = malloc (name_end - string + sizeof "=x"); + if (!name_x) + return -1; + memcpy (name_x, string, name_end - string + 1); + name_x[name_end - string + 1] = 'x'; + name_x[name_end - string + 2] = 0; + putenv_result = _putenv (name_x); + putenv_errno = errno; + for (ep = environ; *ep; ep++) + if (*ep == name_x) + { + *ep = string; + break; + } + free (name_x); + __set_errno (putenv_errno); + return putenv_result; + } +#else static char **last_environ = NULL; char **new_environ = (char **) malloc ((size + 2) * sizeof (char *)); if (new_environ == NULL) @@ -126,6 +157,7 @@ putenv (char *string) free (last_environ); last_environ = new_environ; environ = new_environ; +#endif } else *ep = string; |