1 /* $OpenBSD: user.c,v 1.19 2016/08/30 14:08:16 millert Exp $ */ 2 3 /* Copyright 1988,1990,1993,1994 by Paul Vixie 4 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (c) 1997,2000 by Internet Software Consortium, Inc. 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 17 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/types.h> 21 22 #include <bitstring.h> /* for structs.h */ 23 #include <ctype.h> 24 #include <errno.h> 25 #include <pwd.h> 26 #include <stdio.h> 27 #include <stdlib.h> 28 #include <string.h> 29 #include <syslog.h> 30 #include <time.h> /* for structs.h */ 31 32 #include "macros.h" 33 #include "structs.h" 34 #include "funcs.h" 35 36 void 37 free_user(user *u) 38 { 39 entry *e; 40 41 while ((e = SLIST_FIRST(&u->crontab))) { 42 SLIST_REMOVE_HEAD(&u->crontab, entries); 43 free_entry(e); 44 } 45 free(u->name); 46 free(u); 47 } 48 49 user * 50 load_user(int crontab_fd, struct passwd *pw, const char *name) 51 { 52 char envstr[MAX_ENVSTR]; 53 FILE *file; 54 user *u; 55 entry *e; 56 int status, save_errno; 57 char **envp = NULL, **tenvp; 58 59 if (!(file = fdopen(crontab_fd, "r"))) { 60 syslog(LOG_ERR, "(%s) FDOPEN (%m)", pw->pw_name); 61 return (NULL); 62 } 63 64 /* file is open. build user entry, then read the crontab file. 65 */ 66 if ((u = malloc(sizeof(user))) == NULL) 67 goto done; 68 if ((u->name = strdup(name)) == NULL) { 69 save_errno = errno; 70 free(u); 71 u = NULL; 72 errno = save_errno; 73 goto done; 74 } 75 SLIST_INIT(&u->crontab); 76 77 /* init environment. this will be copied/augmented for each entry. 78 */ 79 if ((envp = env_init()) == NULL) { 80 save_errno = errno; 81 free_user(u); 82 u = NULL; 83 errno = save_errno; 84 goto done; 85 } 86 87 /* load the crontab 88 */ 89 while ((status = load_env(envstr, file)) >= 0) { 90 switch (status) { 91 case FALSE: 92 /* Not an env variable, parse as crontab entry. */ 93 e = load_entry(file, NULL, pw, envp); 94 if (e) 95 SLIST_INSERT_HEAD(&u->crontab, e, entries); 96 break; 97 case TRUE: 98 if ((tenvp = env_set(envp, envstr)) == NULL) { 99 save_errno = errno; 100 free_user(u); 101 u = NULL; 102 errno = save_errno; 103 goto done; 104 } 105 envp = tenvp; 106 break; 107 } 108 } 109 110 done: 111 if (envp != NULL) 112 env_free(envp); 113 fclose(file); 114 return (u); 115 } 116