X-Git-Url: https://git.saurik.com/apple/libc.git/blobdiff_plain/3b2a1fe8d3d02703ddca1b0ead469074d4e47820..5b2abdfbf4211b6592cdd02b9507555a0ecbb04b:/gen/getusershell.c

diff --git a/gen/getusershell.c b/gen/getusershell.c
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+++ b/gen/getusershell.c
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+/*
+ * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License").  You may not use this file except in compliance with the
+ * License.  Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
+ * 
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/*
+ * Copyright (c) 1985, 1993
+ *	The Regents of the University of California.  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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+
+#include <sys/param.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <paths.h>
+
+/*
+ * Local shells should NOT be added here.  They should be added in
+ * /etc/shells.
+ */
+
+static char *okshells[] = { _PATH_BSHELL, _PATH_CSHELL, NULL };
+static char **curshell, **shells, *strings;
+static char **initshells __P((void));
+
+/*
+ * Get a list of shells from _PATH_SHELLS, if it exists.
+ */
+char *
+getusershell()
+{
+	char *ret;
+
+	if (curshell == NULL)
+		curshell = initshells();
+	ret = *curshell;
+	if (ret != NULL)
+		curshell++;
+	return (ret);
+}
+
+void
+endusershell()
+{
+	
+	if (shells != NULL)
+		free(shells);
+	shells = NULL;
+	if (strings != NULL)
+		free(strings);
+	strings = NULL;
+	curshell = NULL;
+}
+
+void
+setusershell()
+{
+
+	curshell = initshells();
+}
+
+static char **
+initshells()
+{
+	register char **sp, *cp;
+	register FILE *fp;
+	struct stat statb;
+
+	if (shells != NULL)
+		free(shells);
+	shells = NULL;
+	if (strings != NULL)
+		free(strings);
+	strings = NULL;
+	if ((fp = fopen(_PATH_SHELLS, "r")) == NULL)
+		return (okshells);
+	if (fstat(fileno(fp), &statb) == -1) {
+		(void)fclose(fp);
+		return (okshells);
+	}
+	if ((strings = malloc((u_int)statb.st_size)) == NULL) {
+		(void)fclose(fp);
+		return (okshells);
+	}
+	shells = calloc((unsigned)statb.st_size / 3, sizeof (char *));
+	if (shells == NULL) {
+		(void)fclose(fp);
+		free(strings);
+		strings = NULL;
+		return (okshells);
+	}
+	sp = shells;
+	cp = strings;
+	while (fgets(cp, MAXPATHLEN + 1, fp) != NULL) {
+		while (*cp != '#' && *cp != '/' && *cp != '\0')
+			cp++;
+		if (*cp == '#' || *cp == '\0')
+			continue;
+		*sp++ = cp;
+		while (!isspace(*cp) && *cp != '#' && *cp != '\0')
+			cp++;
+		*cp++ = '\0';
+	}
+	*sp = NULL;
+	(void)fclose(fp);
+	return (shells);
+}