| 1 | /*
|
|---|
| 2 | * Copyright (c) 1985, 1993
|
|---|
| 3 | * The Regents of the University of California. All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | * 1. Redistributions of source code must retain the above copyright
|
|---|
| 9 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 10 | * 2. Redistributions in binary form must reproduce the above copyright
|
|---|
| 11 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 12 | * documentation and/or other materials provided with the distribution.
|
|---|
| 13 | * 3. Neither the name of the University nor the names of its contributors
|
|---|
| 14 | * may be used to endorse or promote products derived from this software
|
|---|
| 15 | * without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|---|
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|---|
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|---|
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|---|
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|---|
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|---|
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|---|
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|---|
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|---|
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|---|
| 27 | * SUCH DAMAGE.
|
|---|
| 28 | */
|
|---|
| 29 |
|
|---|
| 30 | #include <config.h>
|
|---|
| 31 |
|
|---|
| 32 | #ifndef HAVE_GETUSERSHELL
|
|---|
| 33 |
|
|---|
| 34 | #include <stdio.h>
|
|---|
| 35 | #include <stdlib.h>
|
|---|
| 36 | #include <string.h>
|
|---|
| 37 | #include <ctype.h>
|
|---|
| 38 | #ifdef HAVE_PATHS_H
|
|---|
| 39 | #include <paths.h>
|
|---|
| 40 | #endif
|
|---|
| 41 | #ifdef HAVE_SYS_TYPES_H
|
|---|
| 42 | #include <sys/types.h>
|
|---|
| 43 | #endif
|
|---|
| 44 | #ifdef HAVE_SYS_STAT_H
|
|---|
| 45 | #include <sys/stat.h>
|
|---|
| 46 | #endif
|
|---|
| 47 | #ifdef HAVE_SYS_PARAM_H
|
|---|
| 48 | #include <sys/param.h>
|
|---|
| 49 | #endif
|
|---|
| 50 |
|
|---|
| 51 | #ifdef HAVE_USERSEC_H
|
|---|
| 52 | struct aud_rec;
|
|---|
| 53 | #include <usersec.h>
|
|---|
| 54 | #endif
|
|---|
| 55 | #ifdef HAVE_USERCONF_H
|
|---|
| 56 | #include <userconf.h>
|
|---|
| 57 | #endif
|
|---|
| 58 | #include "roken.h"
|
|---|
| 59 |
|
|---|
| 60 | #ifndef _PATH_SHELLS
|
|---|
| 61 | #define _PATH_SHELLS "/etc/shells"
|
|---|
| 62 | #endif
|
|---|
| 63 |
|
|---|
| 64 | #ifndef _PATH_BSHELL
|
|---|
| 65 | #define _PATH_BSHELL "/bin/sh"
|
|---|
| 66 | #endif
|
|---|
| 67 |
|
|---|
| 68 | #ifndef _PATH_CSHELL
|
|---|
| 69 | #define _PATH_CSHELL "/bin/csh"
|
|---|
| 70 | #endif
|
|---|
| 71 |
|
|---|
| 72 | /*
|
|---|
| 73 | * Local shells should NOT be added here. They should be added in
|
|---|
| 74 | * /etc/shells.
|
|---|
| 75 | */
|
|---|
| 76 |
|
|---|
| 77 | static char *okshells[] = { _PATH_BSHELL, _PATH_CSHELL, NULL };
|
|---|
| 78 | static char **curshell, **shells, *strings;
|
|---|
| 79 | static char **initshells (void);
|
|---|
| 80 |
|
|---|
| 81 | /*
|
|---|
| 82 | * Get a list of shells from _PATH_SHELLS, if it exists.
|
|---|
| 83 | */
|
|---|
| 84 | ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL
|
|---|
| 85 | getusershell()
|
|---|
| 86 | {
|
|---|
| 87 | char *ret;
|
|---|
| 88 |
|
|---|
| 89 | if (curshell == NULL)
|
|---|
| 90 | curshell = initshells();
|
|---|
| 91 | ret = *curshell;
|
|---|
| 92 | if (ret != NULL)
|
|---|
| 93 | curshell++;
|
|---|
| 94 | return (ret);
|
|---|
| 95 | }
|
|---|
| 96 |
|
|---|
| 97 | ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
|
|---|
| 98 | endusershell()
|
|---|
| 99 | {
|
|---|
| 100 | if (shells != NULL)
|
|---|
| 101 | free(shells);
|
|---|
| 102 | shells = NULL;
|
|---|
| 103 | if (strings != NULL)
|
|---|
| 104 | free(strings);
|
|---|
| 105 | strings = NULL;
|
|---|
| 106 | curshell = NULL;
|
|---|
| 107 | }
|
|---|
| 108 |
|
|---|
| 109 | ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
|
|---|
| 110 | setusershell()
|
|---|
| 111 | {
|
|---|
| 112 | curshell = initshells();
|
|---|
| 113 | }
|
|---|
| 114 |
|
|---|
| 115 | static char **
|
|---|
| 116 | initshells()
|
|---|
| 117 | {
|
|---|
| 118 | char **sp, *cp;
|
|---|
| 119 | #ifdef HAVE_GETCONFATTR
|
|---|
| 120 | char *tmp;
|
|---|
| 121 | int nsh;
|
|---|
| 122 | #else
|
|---|
| 123 | FILE *fp;
|
|---|
| 124 | #endif
|
|---|
| 125 | struct stat statb;
|
|---|
| 126 |
|
|---|
| 127 | free(shells);
|
|---|
| 128 | shells = NULL;
|
|---|
| 129 | free(strings);
|
|---|
| 130 | strings = NULL;
|
|---|
| 131 | #ifdef HAVE_GETCONFATTR
|
|---|
| 132 | if(getconfattr(SC_SYS_LOGIN, SC_SHELLS, &tmp, SEC_LIST) != 0)
|
|---|
| 133 | return okshells;
|
|---|
| 134 |
|
|---|
| 135 | for(cp = tmp, nsh = 0; *cp; cp += strlen(cp) + 1, nsh++);
|
|---|
| 136 |
|
|---|
| 137 | shells = calloc(nsh + 1, sizeof(*shells));
|
|---|
| 138 | if(shells == NULL)
|
|---|
| 139 | return okshells;
|
|---|
| 140 |
|
|---|
| 141 | strings = malloc(cp - tmp);
|
|---|
| 142 | if(strings == NULL) {
|
|---|
| 143 | free(shells);
|
|---|
| 144 | shells = NULL;
|
|---|
| 145 | return okshells;
|
|---|
| 146 | }
|
|---|
| 147 | memcpy(strings, tmp, cp - tmp);
|
|---|
| 148 | for(sp = shells, cp = strings; *cp; cp += strlen(cp) + 1, sp++)
|
|---|
| 149 | *sp = cp;
|
|---|
| 150 | #else
|
|---|
| 151 | if ((fp = fopen(_PATH_SHELLS, "r")) == NULL)
|
|---|
| 152 | return (okshells);
|
|---|
| 153 | if (fstat(fileno(fp), &statb) == -1) {
|
|---|
| 154 | fclose(fp);
|
|---|
| 155 | return (okshells);
|
|---|
| 156 | }
|
|---|
| 157 | if ((strings = malloc((u_int)statb.st_size)) == NULL) {
|
|---|
| 158 | fclose(fp);
|
|---|
| 159 | return (okshells);
|
|---|
| 160 | }
|
|---|
| 161 | shells = calloc((unsigned)statb.st_size / 3, sizeof (char *));
|
|---|
| 162 | if (shells == NULL) {
|
|---|
| 163 | fclose(fp);
|
|---|
| 164 | free(strings);
|
|---|
| 165 | strings = NULL;
|
|---|
| 166 | return (okshells);
|
|---|
| 167 | }
|
|---|
| 168 | sp = shells;
|
|---|
| 169 | cp = strings;
|
|---|
| 170 | while (fgets(cp, MaxPathLen + 1, fp) != NULL) {
|
|---|
| 171 | while (*cp != '#' && *cp != '/' && *cp != '\0')
|
|---|
| 172 | cp++;
|
|---|
| 173 | if (*cp == '#' || *cp == '\0')
|
|---|
| 174 | continue;
|
|---|
| 175 | *sp++ = cp;
|
|---|
| 176 | while (!isspace((unsigned char)*cp) && *cp != '#' && *cp != '\0')
|
|---|
| 177 | cp++;
|
|---|
| 178 | *cp++ = '\0';
|
|---|
| 179 | }
|
|---|
| 180 | fclose(fp);
|
|---|
| 181 | #endif
|
|---|
| 182 | *sp = NULL;
|
|---|
| 183 | return (shells);
|
|---|
| 184 | }
|
|---|
| 185 | #endif /* HAVE_GETUSERSHELL */
|
|---|
