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authorGary Houston <ghouston@arglist.com>1997-04-05 21:50:31 +0000
committerGary Houston <ghouston@arglist.com>1997-04-05 21:50:31 +0000
commit19468effd07be6bce3067a814fcfdbad9b9033fb (patch)
tree05b7f4a5261488c5b78bf2c7df4b5ac93adf16c4 /libguile/putenv.c
parentec8c8a5433cb2aac47e40a3abc39e87b8f540a5f (diff)
downloadguile-19468effd07be6bce3067a814fcfdbad9b9033fb.tar.gz
* posix.c (scm_putenv): don't check HAVE_PUTENV.
* Makefile.am (EXTRA_libguile_la_SOURCES): add putenv.c. * configure.in: move putenv from AC_CHECK_FUNCS to AC_REPLACE_FUNCS. * putenv.c: new file, from sh-utils 1.12. * posix.c (scm_environ): use malloc in place of scm_must_malloc since allocation isn't for Scheme objects. (scm_putenv): copy strings before placing in the environment. * stime.c (scm_current_time): throw an error if time returns -1, instead of returning #f. (scm_get_internal_real_time, scm_get_internal_real_time): use scm_long2num for return value instead of SCM_MAKINUM. * stime.h: prototypes updated. * stime.c (scm_time_in_msec): apparently unused, deleted. * configure.in: check for gettimeofday. * stime.c (scm_time_plus_ticks): new procedure, an scsh interface which may be more usefully portable than a gettimeofday interface. * stime.c (filltime): recovered static procedure. (scm_localtime, scm_gmtime, scm_mktime, scm_tzset): recovered from an earlier Guile. * posix.h: add prototype for scm_close_pipe, remove prototypes for scm_open_input_pipe, scm_open_output_pipe, change scm_mknod prototype. * * posix.c (scm_mknod): split the mode argument into type and perms arguments, like the extra fields returned by stat. * fports.c (scm_pipob): set the close, free and print procedures. (scm_close_pipe): new procedure. * posix.c (scm_open_input_pipe, scm_open_output_pipe): deleted, define them in boot-9.scm
Diffstat (limited to 'libguile/putenv.c')
-rw-r--r--libguile/putenv.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/libguile/putenv.c b/libguile/putenv.c
new file mode 100644
index 000000000..06e3254b6
--- /dev/null
+++ b/libguile/putenv.c
@@ -0,0 +1,111 @@
+/* Copyright (C) 1991 Free Software Foundation, Inc.
+
+ 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. */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/types.h>
+#include <errno.h>
+#ifndef errno
+extern int errno;
+#endif
+
+/* Don't include stdlib.h for non-GNU C libraries because some of them
+ contain conflicting prototypes for getopt.
+ This needs to come after some library #include
+ to get __GNU_LIBRARY__ defined. */
+#ifdef __GNU_LIBRARY__
+#include <stdlib.h>
+#else
+char *malloc ();
+#endif /* GNU C library. */
+
+#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
+#include <string.h>
+#else
+#include <strings.h>
+#ifndef strchr
+#define strchr index
+#endif
+#ifndef memcpy
+#define memcpy(d, s, n) bcopy((s), (d), (n))
+#endif
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifndef NULL
+#define NULL 0
+#endif
+
+extern char **environ;
+
+/* Put STRING, which is of the form "NAME=VALUE", in the environment. */
+int
+putenv (string)
+ const char *string;
+{
+ char *name_end = strchr (string, '=');
+ register size_t size;
+ register char **ep;
+
+ if (name_end == NULL)
+ {
+ /* Remove the variable from the environment. */
+ size = strlen (string);
+ for (ep = environ; *ep != NULL; ++ep)
+ if (!strncmp (*ep, string, size) && (*ep)[size] == '=')
+ {
+ while (ep[1] != NULL)
+ {
+ ep[0] = ep[1];
+ ++ep;
+ }
+ *ep = NULL;
+ return 0;
+ }
+ }
+
+ size = 0;
+ for (ep = environ; *ep != NULL; ++ep)
+ if (!strncmp (*ep, string, name_end - string) &&
+ (*ep)[name_end - string] == '=')
+ break;
+ else
+ ++size;
+
+ if (*ep == NULL)
+ {
+ static char **last_environ = NULL;
+ char **new_environ = (char **) malloc ((size + 2) * sizeof (char *));
+ if (new_environ == NULL)
+ return -1;
+ memcpy ((char *) new_environ, (char *) environ, size * sizeof (char *));
+ new_environ[size] = (char *) string;
+ new_environ[size + 1] = NULL;
+ if (last_environ != NULL)
+ free ((char *) last_environ);
+ last_environ = new_environ;
+ environ = new_environ;
+ }
+ else
+ *ep = (char *) string;
+
+ return 0;
+}