1 /* 2 * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers. 3 * All rights reserved. 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Chris Torek. 9 * 10 * By using this file, you agree to the terms and conditions set 11 * forth in the LICENSE file which can be found at the top level of 12 * the sendmail distribution. 13 */ 14 15 #include <sm/gen.h> 16 SM_RCSID("@(#)$Id: sscanf.c,v 1.25 2002/02/01 02:28:00 ca Exp $") 17 #include <string.h> 18 #include <sm/varargs.h> 19 #include <sm/io.h> 20 #include "local.h" 21 22 /* 23 ** SM_EOFREAD -- dummy read function for faked file below 24 ** 25 ** Parameters: 26 ** fp -- file pointer 27 ** buf -- location to place read data 28 ** len -- number of bytes to read 29 ** 30 ** Returns: 31 ** 0 (zero) always 32 */ 33 34 static ssize_t 35 sm_eofread __P(( 36 SM_FILE_T *fp, 37 char *buf, 38 size_t len)); 39 40 /* ARGSUSED0 */ 41 static ssize_t 42 sm_eofread(fp, buf, len) 43 SM_FILE_T *fp; 44 char *buf; 45 size_t len; 46 { 47 return 0; 48 } 49 50 /* 51 ** SM_IO_SSCANF -- scan a string to find data units 52 ** 53 ** Parameters: 54 ** str -- strings containing data 55 ** fmt -- format directive for finding data units 56 ** ... -- memory locations to place format found data units 57 ** 58 ** Returns: 59 ** Failure: SM_IO_EOF 60 ** Success: number of data units found 61 ** 62 ** Side Effects: 63 ** Attempts to strlen() 'str'; if not a '\0' terminated string 64 ** then the call may SEGV/fail. 65 ** Faking the string 'str' as a file. 66 */ 67 68 int 69 #if SM_VA_STD 70 sm_io_sscanf(const char *str, char const *fmt, ...) 71 #else /* SM_VA_STD */ 72 sm_io_sscanf(str, fmt, va_alist) 73 const char *str; 74 char *fmt; 75 va_dcl 76 #endif /* SM_VA_STD */ 77 { 78 int ret; 79 SM_FILE_T fake; 80 SM_VA_LOCAL_DECL 81 82 fake.sm_magic = SmFileMagic; 83 fake.f_flags = SMRD; 84 fake.f_bf.smb_base = fake.f_p = (unsigned char *) str; 85 fake.f_bf.smb_size = fake.f_r = strlen(str); 86 fake.f_file = -1; 87 fake.f_read = sm_eofread; 88 fake.f_write = NULL; 89 fake.f_close = NULL; 90 fake.f_open = NULL; 91 fake.f_seek = NULL; 92 fake.f_setinfo = fake.f_getinfo = NULL; 93 fake.f_type = "sm_io_sscanf:fake"; 94 fake.f_flushfp = NULL; 95 fake.f_ub.smb_base = NULL; 96 fake.f_timeout = SM_TIME_FOREVER; 97 fake.f_timeoutstate = SM_TIME_BLOCK; 98 SM_VA_START(ap, fmt); 99 ret = sm_vfscanf(&fake, SM_TIME_FOREVER, fmt, ap); 100 SM_VA_END(ap); 101 return ret; 102 } 103