1 /* $OpenBSD: user.c,v 1.21 2018/02/05 03:52:37 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 #include "globals.h" 36 37 void 38 free_user(user *u) 39 { 40 entry *e; 41 42 while ((e = SLIST_FIRST(&u->crontab))) { 43 SLIST_REMOVE_HEAD(&u->crontab, entries); 44 free_entry(e); 45 } 46 free(u->name); 47 free(u); 48 } 49 50 static int ParseErrorCount; 51 static const char *CrontabFilename; 52 53 static void 54 parse_error(const char *msg) 55 { 56 ParseErrorCount++; 57 syslog(LOG_ERR, "(CRON) %s:%d (%s)", CrontabFilename, LineNumber, msg); 58 } 59 60 user * 61 load_user(FILE *file, struct passwd *pw, const char *name) 62 { 63 char envstr[MAX_ENVSTR]; 64 user *u; 65 entry *e; 66 int status, save_errno; 67 char **envp = NULL, **tenvp; 68 69 CrontabFilename = name; 70 LineNumber = 0; 71 72 /* file is open. build user entry, then read the crontab file. 73 */ 74 if ((u = malloc(sizeof(user))) == NULL) 75 goto done; 76 if ((u->name = strdup(name)) == NULL) { 77 save_errno = errno; 78 free(u); 79 u = NULL; 80 errno = save_errno; 81 goto done; 82 } 83 SLIST_INIT(&u->crontab); 84 85 /* init environment. this will be copied/augmented for each entry. 86 */ 87 if ((envp = env_init()) == NULL) { 88 save_errno = errno; 89 free_user(u); 90 u = NULL; 91 errno = save_errno; 92 goto done; 93 } 94 95 /* load the crontab 96 */ 97 ParseErrorCount = 0; 98 while ((status = load_env(envstr, file)) >= 0) { 99 switch (status) { 100 case FALSE: 101 /* Not an env variable, parse as crontab entry. */ 102 e = load_entry(file, parse_error, pw, envp); 103 if (e == NULL) { 104 /* Parse error, ignore for non-root entries */ 105 if (pw != NULL) { 106 save_errno = errno; 107 free_user(u); 108 u = NULL; 109 errno = save_errno; 110 goto done; 111 } 112 } else { 113 SLIST_INSERT_HEAD(&u->crontab, e, entries); 114 } 115 break; 116 case TRUE: 117 if ((tenvp = env_set(envp, envstr)) == NULL) { 118 save_errno = errno; 119 free_user(u); 120 u = NULL; 121 errno = save_errno; 122 goto done; 123 } 124 envp = tenvp; 125 break; 126 } 127 } 128 129 done: 130 if (envp != NULL) 131 env_free(envp); 132 return (u); 133 } 134