Adding upstream version 1:4.8.1.upstream/1%4.8.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 312 insertions, 0 deletions

diff --git a/libmisc/setupenv.c b/libmisc/setupenv.c
new file mode 100644
index 0000000..24c6e67
--- /dev/null
+++ b/libmisc/setupenv.c
@@ -0,0 +1,312 @@
+/*
+ * Copyright (c) 1989 - 1994, Julianne Frances Haugh
+ * Copyright (c) 1996 - 2000, Marek Michałkiewicz
+ * Copyright (c) 2001 - 2006, Tomasz Kłoczko
+ * Copyright (c) 2007 - 2010, Nicolas François
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Separated from setup.c.  --marekm
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <ctype.h>
+#include "prototypes.h"
+#include "defines.h"
+#include <pwd.h>
+#include "getdef.h"
+
+#ifndef USE_PAM
+static void
+addenv_path (const char *varname, const char *dirname, const char *filename)
+{
+	char *buf;
+	size_t len = strlen (dirname) + strlen (filename) + 2;
+	int wlen;
+
+	buf = xmalloc (len);
+	wlen = snprintf (buf, len, "%s/%s", dirname, filename);
+	assert (wlen == (int) len - 1);
+
+	addenv (varname, buf);
+	free (buf);
+}
+
+static void read_env_file (const char *filename)
+{
+	FILE *fp;
+	char buf[1024];
+	char *cp, *name, *val;
+
+	fp = fopen (filename, "r");
+	if (NULL == fp) {
+		return;
+	}
+	while (fgets (buf, (int)(sizeof buf), fp) == buf) {
+		cp = strrchr (buf, '\n');
+		if (NULL == cp) {
+			break;
+		}
+		*cp = '\0';
+
+		cp = buf;
+		/* ignore whitespace and comments */
+		while (('\0' != *cp) && isspace (*cp)) {
+			cp++;
+		}
+		if (('\0' == *cp) || ('#' == *cp)) {
+			continue;
+		}
+		/*
+		 * ignore lines which don't follow the name=value format
+		 * (for example, the "export NAME" shell commands)
+		 */
+		name = cp;
+		while (('\0' != *cp) && !isspace (*cp) && ('=' != *cp)) {
+			cp++;
+		}
+		if ('=' != *cp) {
+			continue;
+		}
+		/* NUL-terminate the name */
+		*cp = '\0';
+		cp++;
+		val = cp;
+#if 0				/* XXX untested, and needs rewrite with fewer goto's :-) */
+/*
+ (state, char_type) -> (state, action)
+
+ state: unquoted, single_quoted, double_quoted, escaped, double_quoted_escaped
+ char_type: normal, white, backslash, single, double
+ action: remove_curr, remove_curr_skip_next, remove_prev, finish XXX
+*/
+	      no_quote:
+		if (*cp == '\\') {
+			/* remove the backslash */
+			remove_char (cp);
+			/* skip over the next character */
+			if (*cp)
+				cp++;
+			goto no_quote;
+		} else if (*cp == '\'') {
+			/* remove the quote */
+			remove_char (cp);
+			/* now within single quotes */
+			goto s_quote;
+		} else if (*cp == '"') {
+			/* remove the quote */
+			remove_char (cp);
+			/* now within double quotes */
+			goto d_quote;
+		} else if (*cp == '\0') {
+			/* end of string */
+			goto finished;
+		} else if (isspace (*cp)) {
+			/* unescaped whitespace - end of string */
+			*cp = '\0';
+			goto finished;
+		} else {
+			cp++;
+			goto no_quote;
+		}
+	      s_quote:
+		if (*cp == '\'') {
+			/* remove the quote */
+			remove_char (cp);
+			/* unquoted again */
+			goto no_quote;
+		} else if (*cp == '\0') {
+			/* end of string */
+			goto finished;
+		} else {
+			/* preserve everything within single quotes */
+			cp++;
+			goto s_quote;
+		}
+	      d_quote:
+		if (*cp == '\"') {
+			/* remove the quote */
+			remove_char (cp);
+			/* unquoted again */
+			goto no_quote;
+		} else if (*cp == '\\') {
+			cp++;
+			/* if backslash followed by double quote, remove backslash
+			   else skip over the backslash and following char */
+			if (*cp == '"')
+				remove_char (cp - 1);
+			else if (*cp)
+				cp++;
+			goto d_quote;
+		}
+		else if (*cp == '\0') {
+			/* end of string */
+			goto finished;
+		} else {
+			/* preserve everything within double quotes */
+			goto d_quote;
+		}
+	      finished:
+#endif				/* 0 */
+		/*
+		 * XXX - should handle quotes, backslash escapes, etc.
+		 * like the shell does.
+		 */
+		addenv (name, val);
+	}
+	(void) fclose (fp);
+}
+#endif				/* USE_PAM */
+
+
+/*
+ *	change to the user's home directory
+ *	set the HOME, SHELL, MAIL, PATH, and LOGNAME or USER environmental
+ *	variables.
+ */
+
+void setup_env (struct passwd *info)
+{
+#ifndef USE_PAM
+	const char *envf;
+#endif
+	const char *cp;
+
+	/*
+	 * Change the current working directory to be the home directory
+	 * of the user.  It is a fatal error for this process to be unable
+	 * to change to that directory.  There is no "default" home
+	 * directory.
+	 *
+	 * We no longer do it as root - should work better on NFS-mounted
+	 * home directories.  Some systems default to HOME=/, so we make
+	 * this a configurable option.  --marekm
+	 */
+
+	if (chdir (info->pw_dir) == -1) {
+		static char temp_pw_dir[] = "/";
+
+		if (!getdef_bool ("DEFAULT_HOME") || chdir ("/") == -1) {
+			fprintf (stderr, _("Unable to cd to '%s'\n"),
+				 info->pw_dir);
+			SYSLOG ((LOG_WARN,
+				 "unable to cd to `%s' for user `%s'\n",
+				 info->pw_dir, info->pw_name));
+			closelog ();
+			exit (EXIT_FAILURE);
+		}
+		(void) puts (_("No directory, logging in with HOME=/"));
+		free (info->pw_dir);
+		info->pw_dir = xstrdup (temp_pw_dir);
+	}
+
+	/*
+	 * Create the HOME environmental variable and export it.
+	 */
+
+	addenv ("HOME", info->pw_dir);
+
+	/*
+	 * Create the SHELL environmental variable and export it.
+	 */
+
+	if ((NULL == info->pw_shell) || ('\0' == *info->pw_shell)) {
+		static char temp_pw_shell[] = SHELL;
+
+		free (info->pw_shell);
+		info->pw_shell = xstrdup (temp_pw_shell);
+	}
+
+	addenv ("SHELL", info->pw_shell);
+
+	/*
+	 * Export the user name.  For BSD derived systems, it's "USER", for
+	 * all others it's "LOGNAME".  We set both of them.
+	 */
+
+	addenv ("USER", info->pw_name);
+	addenv ("LOGNAME", info->pw_name);
+
+	/*
+	 * Create the PATH environmental variable and export it.
+	 */
+
+	cp = getdef_str ((info->pw_uid == 0) ? "ENV_SUPATH" : "ENV_PATH");
+
+	if (NULL == cp) {
+		/* not specified, use a minimal default */
+		addenv ((info->pw_uid == 0) ? "PATH=/sbin:/bin:/usr/sbin:/usr/bin" : "PATH=/bin:/usr/bin", NULL);
+	} else if (strchr (cp, '=')) {
+		/* specified as name=value (PATH=...) */
+		addenv (cp, NULL);
+	} else {
+		/* only value specified without "PATH=" */
+		addenv ("PATH", cp);
+	}
+
+#ifndef USE_PAM
+	/*
+	 * Create the MAIL environmental variable and export it.  login.defs
+	 * knows the prefix.
+	 */
+
+	if (getdef_bool ("MAIL_CHECK_ENAB")) {
+		cp = getdef_str ("MAIL_DIR");
+		if (NULL != cp) {
+			addenv_path ("MAIL", cp, info->pw_name);
+		} else {
+			cp = getdef_str ("MAIL_FILE");
+			if (NULL != cp) {
+				addenv_path ("MAIL", info->pw_dir, cp);
+			} else {
+#if defined(MAIL_SPOOL_FILE)
+				addenv_path ("MAIL", info->pw_dir, MAIL_SPOOL_FILE);
+#elif defined(MAIL_SPOOL_DIR)
+				addenv_path ("MAIL", MAIL_SPOOL_DIR, info->pw_name);
+#endif
+			}
+		}
+	}
+
+	/*
+	 * Read environment from optional config file.  --marekm
+	 */
+	envf = getdef_str ("ENVIRON_FILE");
+	if (NULL != envf) {
+		read_env_file (envf);
+	}
+#endif				/* !USE_PAM */
+}
+