| 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * password utility routines.
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| 4 | *
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| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 6 | *
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| 7 | * Licensed under the GPL v2, see the file LICENSE in this tarball.
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| 8 | */
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| 9 |
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| 10 |
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| 11 | #ifdef L_bb_getgrgid
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| 12 | /* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
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| 13 | * flexible :
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| 14 | *
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| 15 | * if bufsize is > 0 char *group cannot be set to NULL.
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| 16 | * On success groupname is written on static allocated buffer
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| 17 | * group (and a pointer to it is returned).
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| 18 | * On failure gid as string is written to static allocated
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| 19 | * buffer group and NULL is returned.
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| 20 | * if bufsize is = 0 char *group can be set to NULL.
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| 21 | * On success groupname is returned.
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| 22 | * On failure NULL is returned.
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| 23 | * if bufsize is < 0 char *group can be set to NULL.
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| 24 | * On success groupname is returned.
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| 25 | * On failure an error message is printed and
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| 26 | * the program exits.
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| 27 | */
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| 28 |
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| 29 | #include "libbb.h"
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| 30 | #include "grp_.h"
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| 31 |
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| 32 | /* gets a groupname given a gid */
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| 33 | char * bb_getgrgid(char *group, long gid, int bufsize)
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| 34 | {
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| 35 | struct group *mygroup = getgrgid(gid);
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| 36 |
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| 37 | return bb_getug(group, (mygroup) ?
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| 38 | mygroup->gr_name : (char *)mygroup, gid, bufsize, 'g');
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| 39 | }
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| 40 | #endif /* L_bb_getgrgid */
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| 41 |
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| 42 | #ifdef L_bb_xgetgrnam
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| 43 | #include <stdio.h>
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| 44 | #include <string.h>
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| 45 | #include "libbb.h"
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| 46 | #include "pwd_.h"
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| 47 | #include "grp_.h"
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| 48 |
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| 49 |
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| 50 | /* returns a gid given a group name */
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| 51 | long bb_xgetgrnam(const char *name)
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| 52 | {
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| 53 | struct group *mygroup;
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| 54 |
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| 55 | mygroup = getgrnam(name);
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| 56 | if (mygroup==NULL)
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| 57 | bb_error_msg_and_die("unknown group name: %s", name);
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| 58 |
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| 59 | return (mygroup->gr_gid);
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| 60 | }
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| 61 | #endif /* L_bb_xgetgrnam */
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| 62 |
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| 63 | #ifdef L_bb_xgetpwnam
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| 64 | #include <stdio.h>
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| 65 | #include <string.h>
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| 66 | #include "libbb.h"
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| 67 | #include "pwd_.h"
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| 68 | #include "grp_.h"
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| 69 |
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| 70 |
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| 71 | /* returns a uid given a username */
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| 72 | long bb_xgetpwnam(const char *name)
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| 73 | {
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| 74 | struct passwd *myuser;
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| 75 |
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| 76 | myuser = getpwnam(name);
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| 77 | if (myuser==NULL)
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| 78 | bb_error_msg_and_die("unknown user name: %s", name);
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| 79 |
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| 80 | return myuser->pw_uid;
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| 81 | }
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| 82 | #endif /* L_bb_xgetpwnam */
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| 83 |
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| 84 | #ifdef L_bb_getpwuid
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| 85 | /* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
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| 86 | * flexible :
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| 87 | *
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| 88 | * if bufsize is > 0 char *name can not be set to NULL.
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| 89 | * On success username is written on the static allocated
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| 90 | * buffer name (and a pointer to it is returned).
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| 91 | * On failure uid as string is written to the static
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| 92 | * allocated buffer name and NULL is returned.
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| 93 | * if bufsize is = 0 char *name can be set to NULL.
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| 94 | * On success username is returned.
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| 95 | * On failure NULL is returned.
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| 96 | * if bufsize is < 0 char *name can be set to NULL
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| 97 | * On success username is returned.
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| 98 | * On failure an error message is printed and
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| 99 | * the program exits.
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| 100 | */
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| 101 |
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| 102 | #include "libbb.h"
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| 103 | #include "pwd_.h"
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| 104 |
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| 105 | /* gets a username given a uid */
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| 106 | char * bb_getpwuid(char *name, long uid, int bufsize)
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| 107 | {
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| 108 | struct passwd *myuser = getpwuid(uid);
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| 109 |
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| 110 | return bb_getug(name, (myuser) ?
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| 111 | myuser->pw_name : (char *)myuser , uid, bufsize, 'u');
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| 112 | }
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| 113 | #endif /* L_bb_getpwuid */
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| 114 |
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| 115 | #ifdef L_bb_getug
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| 116 | /*
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| 117 | * if bufsize is > 0 char *buffer can not be set to NULL.
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| 118 | * If idname is not NULL it is written on the static
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| 119 | * allocated buffer (and a pointer to it is returned).
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| 120 | * if idname is NULL, id as string is written to the static
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| 121 | * allocated buffer and NULL is returned.
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| 122 | * if bufsize is = 0 char *buffer can be set to NULL.
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| 123 | * If idname exists a pointer to it is returned,
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| 124 | * else NULL is returned.
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| 125 | * if bufsize is < 0 char *buffer can be set to NULL.
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| 126 | * If idname exists a pointer to it is returned,
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| 127 | * else an error message is printed and the program exits.
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| 128 | */
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| 129 |
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| 130 | #include <stdio.h>
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| 131 | #include <assert.h>
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| 132 | #include "libbb.h"
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| 133 |
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| 134 |
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| 135 | /* internal function for bb_getpwuid and bb_getgrgid */
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| 136 | char * bb_getug(char *buffer, char *idname, long id, int bufsize, char prefix)
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| 137 | {
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| 138 | if(bufsize > 0 ) {
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| 139 | assert(buffer!=NULL);
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| 140 | if(idname) {
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| 141 | return safe_strncpy(buffer, idname, bufsize);
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| 142 | }
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| 143 | snprintf(buffer, bufsize, "%ld", id);
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| 144 | } else if(bufsize < 0 && !idname) {
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| 145 | bb_error_msg_and_die("unknown %cid %ld", prefix, id);
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| 146 | }
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| 147 | return idname;
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| 148 | }
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| 149 | #endif /* L_bb_getug */
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| 150 |
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| 151 |
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| 152 | #ifdef L_get_ug_id
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| 153 | /* indirect dispatcher for pwd helpers. */
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| 154 | #include <stdlib.h>
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| 155 | #include "libbb.h"
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| 156 |
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| 157 | unsigned long get_ug_id(const char *s,
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| 158 | long (*__bb_getxxnam)(const char *))
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| 159 | {
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| 160 | unsigned long r;
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| 161 | char *p;
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| 162 |
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| 163 | r = strtoul(s, &p, 10);
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| 164 | if (*p || (s == p)) {
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| 165 | r = __bb_getxxnam(s);
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| 166 | }
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| 167 |
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| 168 | return r;
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| 169 | }
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| 170 | #endif /* L_get_ug_id */
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