diff options
Diffstat (limited to 'crypto/heimdal/lib/roken/getusershell.c')
| -rw-r--r-- | crypto/heimdal/lib/roken/getusershell.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/roken/getusershell.c b/crypto/heimdal/lib/roken/getusershell.c new file mode 100644 index 0000000..87a48ec --- /dev/null +++ b/crypto/heimdal/lib/roken/getusershell.c @@ -0,0 +1,160 @@ +/* + * 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. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +RCSID("$Id: getusershell.c,v 1.8 1997/04/20 06:18:03 assar Exp $"); + +#ifndef HAVE_GETUSERSHELL + +#include <stdio.h> +#include <stdlib.h> +#ifdef HAVE_PATHS_H +#include <paths.h> +#endif +#ifdef HAVE_SYS_TYPES_H +#include <sys/types.h> +#endif +#ifdef HAVE_SYS_STAT_H +#include <sys/stat.h> +#endif +#ifdef HAVE_SYS_PARAM_H +#include <sys/param.h> +#endif + +#ifndef _PATH_SHELLS +#define _PATH_SHELLS "/etc/shells" +#endif + +#ifndef _PATH_BSHELL +#define _PATH_BSHELL "/bin/sh" +#endif + +#ifndef _PATH_CSHELL +#define _PATH_CSHELL "/bin/csh" +#endif + +/* + * 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 (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() +{ + char **sp, *cp; + 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) { + fclose(fp); + return (okshells); + } + if ((strings = malloc((u_int)statb.st_size)) == NULL) { + fclose(fp); + return (okshells); + } + shells = calloc((unsigned)statb.st_size / 3, sizeof (char *)); + if (shells == NULL) { + 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; + fclose(fp); + return (shells); +} +#endif /* HAVE_GETUSERSHELL */ |
