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 #pragma ident "%Z%%M% %I% %E% SMI" 16 17 #include <sm/gen.h> 18 SM_RCSID("@(#)$Id: sscanf.c,v 1.25 2002/02/01 02:28:00 ca Exp $") 19 #include <string.h> 20 #include <sm/varargs.h> 21 #include <sm/io.h> 22 #include "local.h" 23 24 /* 25 ** SM_EOFREAD -- dummy read function for faked file below 26 ** 27 ** Parameters: 28 ** fp -- file pointer 29 ** buf -- location to place read data 30 ** len -- number of bytes to read 31 ** 32 ** Returns: 33 ** 0 (zero) always 34 */ 35 36 static ssize_t 37 sm_eofread __P(( 38 SM_FILE_T *fp, 39 char *buf, 40 size_t len)); 41 42 /* ARGSUSED0 */ 43 static ssize_t 44 sm_eofread(fp, buf, len) 45 SM_FILE_T *fp; 46 char *buf; 47 size_t len; 48 { 49 return 0; 50 } 51 52 /* 53 ** SM_IO_SSCANF -- scan a string to find data units 54 ** 55 ** Parameters: 56 ** str -- strings containing data 57 ** fmt -- format directive for finding data units 58 ** ... -- memory locations to place format found data units 59 ** 60 ** Returns: 61 ** Failure: SM_IO_EOF 62 ** Success: number of data units found 63 ** 64 ** Side Effects: 65 ** Attempts to strlen() 'str'; if not a '\0' terminated string 66 ** then the call may SEGV/fail. 67 ** Faking the string 'str' as a file. 68 */ 69 70 int 71 #if SM_VA_STD 72 sm_io_sscanf(const char *str, char const *fmt, ...) 73 #else /* SM_VA_STD */ 74 sm_io_sscanf(str, fmt, va_alist) 75 const char *str; 76 char *fmt; 77 va_dcl 78 #endif /* SM_VA_STD */ 79 { 80 int ret; 81 SM_FILE_T fake; 82 SM_VA_LOCAL_DECL 83 84 fake.sm_magic = SmFileMagic; 85 fake.f_flags = SMRD; 86 fake.f_bf.smb_base = fake.f_p = (unsigned char *) str; 87 fake.f_bf.smb_size = fake.f_r = strlen(str); 88 fake.f_file = -1; 89 fake.f_read = sm_eofread; 90 fake.f_write = NULL; 91 fake.f_close = NULL; 92 fake.f_open = NULL; 93 fake.f_seek = NULL; 94 fake.f_setinfo = fake.f_getinfo = NULL; 95 fake.f_type = "sm_io_sscanf:fake"; 96 fake.f_flushfp = NULL; 97 fake.f_ub.smb_base = NULL; 98 fake.f_timeout = SM_TIME_FOREVER; 99 fake.f_timeoutstate = SM_TIME_BLOCK; 100 SM_VA_START(ap, fmt); 101 ret = sm_vfscanf(&fake, SM_TIME_FOREVER, fmt, ap); 102 SM_VA_END(ap); 103 return ret; 104 } 105