compat.c #3

/************************************************************
** $Id: compat.c,v 1.3 2003/11/24 18:38:35 bcx Exp bcx $
**
** Copyright Bryan Costales and Perforce Software, Inc. 2003
**
** This code is "open source" as defined by version 1.9 of
** the Open Source Definition from:
**
**	http://www.opensource.org/docs/definition.php.
**
** This file includes source for the routines missing on
** some versions of Unix.
**
*************************************************************/

# define EXTERN extern
# include "slow.h"

# ifndef HAVE_BASENAME
char *
basename(char *path)
{
	char *cp;

	if ((cp = strrchr(path, '/')) != NULL)
		++cp;
	else
		cp = path;
	return cp;
}
#endif

# ifndef HAVE_CUSERID
# include <pwd.h>
char *
cuserid(char *buf)
{
	struct passwd *pw;
	uid_t uid;

	uid = geteuid();
	pw = getpwuid(uid);
	if (pw != NULL)
		return pw->pw_name;
	return NULL;
}
# endif

# ifndef HAVE_STRERROR
char *
strerror(int err)
{
	static char buf[BUFSIZ];

	if (err >= 0 && err < sys_nerr)
		return (char *) sys_errlist[err];

	(void) snprintf(buf, sizeof(buf), "Error %d", err);
	return buf;
}
# endif

# ifndef HAVE_STRCHR
char *
strchr(char *str, int c)
{
	char *cp;

	if (str == NULL || *str == '\0')
		return NULL;
	for (cp = str; *cp != '\0'; ++cp)
		if ((int)(*cp) == c)
			return cp;
	return NULL;
}
# endif

# ifndef HAVE_STRRCHR
char *
strrchr(char *str, int c)
{
	char *cp;

	if (str == NULL || *str == '\0')
		return NULL;
	cp = str + strlen(str);
	for (; cp >= str; --cp)
		if ((int)(*cp) == c)
			return cp;
	return NULL;
}
# endif