honeyd/vasprintf.c@c10fb90893b9
honeyd/vasprintf.c
Thu, 04 Oct 2012 20:30:05 +0200
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 04 Oct 2012 20:30:05 +0200
- changeset 715
- c10fb90893b9
- permissions
- -rw-r--r--
Correct out of date build configuration, porting to Solaris 11 network
link infrastructure and new libpcap logic. This additionally allows for
device drivers in subdirectories of /dev. Correct packaged nmap
personalities and signatures to work out of the box. Finally, hack
arpd logic to properly close sockets and quit on TERM by repeating
signaling in the run command script. Sadly, all this fails to correct
the run time behaviour of honeyd which fails to bind to the IP layer.
1 /* Like vsprintf but provides a pointer to malloc'd storage, which must
2 be freed by the caller.
3 Copyright (C) 1994, 2003 Free Software Foundation, Inc.
5 This file is part of the libiberty library.
6 Libiberty is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public
8 License as published by the Free Software Foundation; either
9 version 2 of the License, or (at your option) any later version.
11 Libiberty is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with libiberty; see the file COPYING.LIB. If
18 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 #include <stdarg.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include "vasprintf.h"
27 /*
29 @deftypefn Extension int vasprintf (char **@var{resptr}, const char *@var{format}, va_list @var{args})
31 Like @code{vsprintf}, but instead of passing a pointer to a buffer,
32 you pass a pointer to a pointer. This function will compute the size
33 of the buffer needed, allocate memory with @code{malloc}, and store a
34 pointer to the allocated memory in @code{*@var{resptr}}. The value
35 returned is the same as @code{vsprintf} would return. If memory could
36 not be allocated, minus one is returned and @code{NULL} is stored in
37 @code{*@var{resptr}}.
39 @end deftypefn
41 */
43 static int int_vasprintf(char **, const char *, va_list);
45 static int
46 int_vasprintf (result, format, args)
47 char **result;
48 const char *format;
49 va_list args;
50 {
51 const char *p = format;
52 /* Add one to make sure that it is never zero, which might cause malloc
53 to return NULL. */
54 int total_width = strlen (format) + 1;
55 va_list ap;
57 memcpy ((void *) &ap, (const void *) &args, sizeof (va_list));
59 while (*p != '\0')
60 {
61 if (*p++ == '%')
62 {
63 while (strchr ("-+ #0", *p))
64 ++p;
65 if (*p == '*')
66 {
67 ++p;
68 total_width += abs (va_arg (ap, int));
69 }
70 else
71 total_width += strtoul (p, (char **) &p, 10);
72 if (*p == '.')
73 {
74 ++p;
75 if (*p == '*')
76 {
77 ++p;
78 total_width += abs (va_arg (ap, int));
79 }
80 else
81 total_width += strtoul (p, (char **) &p, 10);
82 }
83 while (strchr ("hlL", *p))
84 ++p;
85 /* Should be big enough for any format specifier except %s and floats. */
86 total_width += 30;
87 switch (*p)
88 {
89 case 'd':
90 case 'i':
91 case 'o':
92 case 'u':
93 case 'x':
94 case 'X':
95 case 'c':
96 (void) va_arg (ap, int);
97 break;
98 case 'f':
99 case 'e':
100 case 'E':
101 case 'g':
102 case 'G':
103 (void) va_arg (ap, double);
104 /* Since an ieee double can have an exponent of 307, we'll
105 make the buffer wide enough to cover the gross case. */
106 total_width += 307;
107 break;
108 case 's':
109 total_width += strlen (va_arg (ap, char *));
110 break;
111 case 'p':
112 case 'n':
113 (void) va_arg (ap, char *);
114 break;
115 }
116 p++;
117 }
118 }
119 *result = (char *) malloc (total_width);
120 if (*result != NULL)
121 return vsprintf (*result, format, args);
122 else
123 return -1;
124 }
126 int
127 vasprintf (result, format, args)
128 char **result;
129 const char *format;
130 va_list args;
131 {
132 return int_vasprintf (result, format, args);
133 }
