diff options
author | Todd C. Miller <millert@cvs.openbsd.org> | 2001-09-11 18:55:53 +0000 |
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committer | Todd C. Miller <millert@cvs.openbsd.org> | 2001-09-11 18:55:53 +0000 |
commit | 4643c616c81fb1198b29c3eaff4d697392c8dc4b (patch) | |
tree | 4afa26a5f1a2ef0e47061eb08b6d339bc7e8dad1 /gnu/usr.sbin/sendmail/libsm/snprintf.c | |
parent | 8afe339a41c898cc4a2d42d03d115b16f2053bad (diff) |
sendmail 8.12.0 with $Id tags converted to $Sendmail
Diffstat (limited to 'gnu/usr.sbin/sendmail/libsm/snprintf.c')
-rw-r--r-- | gnu/usr.sbin/sendmail/libsm/snprintf.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/gnu/usr.sbin/sendmail/libsm/snprintf.c b/gnu/usr.sbin/sendmail/libsm/snprintf.c new file mode 100644 index 00000000000..9994140fff6 --- /dev/null +++ b/gnu/usr.sbin/sendmail/libsm/snprintf.c @@ -0,0 +1,86 @@ +/* + * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers. + * All rights reserved. + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Chris Torek. + * + * By using this file, you agree to the terms and conditions set + * forth in the LICENSE file which can be found at the top level of + * the sendmail distribution. + */ + +#include <sm/gen.h> +SM_RCSID("@(#)$Sendmail: snprintf.c,v 1.21 2001/03/02 23:53:41 ca Exp $") +#include <limits.h> +#include <sm/varargs.h> +#include <sm/io.h> +#include "local.h" + +/* +** SM_SNPRINTF -- format a string to a memory location of restricted size +** +** Parameters: +** str -- memory location to place formatted string +** n -- size of buffer pointed to by str, capped to +** a maximum of INT_MAX +** fmt -- the formatting directives +** ... -- the data to satisfy the formatting +** +** Returns: +** Failure: -1 +** Success: number of bytes that would have been written +** to str, not including the trailing '\0', +** up to a maximum of INT_MAX, as if there was +** no buffer size limitation. If the result >= n +** then the output was truncated. +** +** Side Effects: +** If n > 0, then between 0 and n-1 bytes of formatted output +** are written into 'str', followed by a '\0'. +*/ + +int +#if SM_VA_STD +sm_snprintf(char *str, size_t n, char const *fmt, ...) +#else /* SM_VA_STD */ +sm_snprintf(str, n, fmt, va_alist) + char *str; + size_t n; + char *fmt; + va_dcl +#endif /* SM_VA_STD */ +{ + int ret; + SM_VA_LOCAL_DECL + SM_FILE_T fake; + + /* While snprintf(3) specifies size_t stdio uses an int internally */ + if (n > INT_MAX) + n = INT_MAX; + SM_VA_START(ap, fmt); + + /* XXX put this into a static? */ + fake.sm_magic = SmFileMagic; + fake.f_file = -1; + fake.f_flags = SMWR | SMSTR; + fake.f_cookie = &fake; + fake.f_bf.smb_base = fake.f_p = (unsigned char *)str; + fake.f_bf.smb_size = fake.f_w = n ? n - 1 : 0; + fake.f_timeout = SM_TIME_FOREVER; + fake.f_timeoutstate = SM_TIME_BLOCK; + fake.f_close = NULL; + fake.f_open = NULL; + fake.f_read = NULL; + fake.f_write = NULL; + fake.f_seek = NULL; + fake.f_setinfo = fake.f_getinfo = NULL; + fake.f_type = "sm_snprintf:fake"; + ret = sm_io_vfprintf(&fake, SM_TIME_FOREVER, fmt, ap); + if (n > 0) + *fake.f_p = '\0'; + SM_VA_END(ap); + return ret; +} |