1 files changed, 102 insertions, 0 deletions
diff --git a/src/logdir.c b/src/logdir.c
new file mode 100644
index 0000000..8ed4b40
--- /dev/null
+++ b/src/logdir.c
@@ -0,0 +1,102 @@
+/*===========================================================================
+ Copyright (c) 1998-2000, The Santa Cruz Operation 
+ All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ *Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+
+ *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.
+
+ *Neither name of The Santa Cruz Operation 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 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 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. 
+ =========================================================================*/
+
+/*
+ *	logdir()
+ *
+ *	This routine does not use the getpwent(3) library routine
+ *	because the latter uses the stdio package.  The allocation of
+ *	storage in this package destroys the integrity of the shell's
+ *	storage allocation.
+ */
+
+#include <unistd.h>
+#include <string.h>
+#include "global.h"
+
+#define	OURBUFSIZ	160	/* renamed: avoid conflict with <stdio.h> */
+
+static char const rcsid[] = "$Id: logdir.c,v 1.5 2002/07/28 15:40:07 broeker Exp $";
+
+static char line[OURBUFSIZ+1];
+
+/* Internal prototypes: */
+static	char	*nextfield(char *p);
+
+
+static char *
+nextfield(char *p)
+{
+	while (*p && *p != ':')
+		++p;
+	if (*p) *p++ = 0;
+	return(p);
+}
+
+char *
+logdir(char *name)
+{
+	char	*p;
+	int	i, j;
+	int	pwf;
+	
+	/* attempt to open the password file */
+	if ((pwf = myopen("/etc/passwd", 0, 0)) == -1)
+		return(0);
+		
+	/* find the matching password entry */
+	do {
+		/* get the next line in the password file */
+		i = read(pwf, line, OURBUFSIZ);
+		for (j = 0; j < i; j++)
+			if (line[j] == '\n')
+				break;
+		/* return a null pointer if the whole file has been read */
+		if (j >= i)
+			return(0);
+		line[++j] = 0;			/* terminate the line */
+		(void) lseek(pwf, (long) (j - i), 1);	/* point at the next line */
+		p = nextfield(line);		/* get the logname */
+	} while (*name != *line ||	/* fast pretest */
+	    strcmp(name, line) != 0);
+	(void) close(pwf);
+	
+	/* skip the intervening fields */
+	p = nextfield(p);
+	p = nextfield(p);
+	p = nextfield(p);
+	p = nextfield(p);
+	
+	/* return the login directory */
+	(void) nextfield(p);
+	return(p);
+}