Annotation of src/usr.bin/sudo/compat.h, Revision 1.2
1.1 millert 1: /*
1.2 ! millert 2: * Copyright (c) 1996, 1998-2000 Todd C. Miller <Todd.Miller@courtesan.com>
1.1 millert 3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: *
9: * 1. Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: *
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: *
16: * 3. The name of the author may not be used to endorse or promote products
17: * derived from this software without specific prior written permission.
18: *
19: * 4. Products derived from this software may not be called "Sudo" nor
20: * may "Sudo" appear in their names without specific prior written
21: * permission from the author.
22: *
23: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
24: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
25: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
26: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33: *
1.2 ! millert 34: * $Sudo: compat.h,v 1.61 2002/01/02 22:37:19 millert Exp $
1.1 millert 35: */
36:
37: #ifndef _SUDO_COMPAT_H
38: #define _SUDO_COMPAT_H
39:
40: /*
41: * Macros that may be missing on some Operating Systems
42: */
43:
44: /* Deal with ANSI stuff reasonably. */
45: #ifndef __P
46: # if defined (__cplusplus) || defined (__STDC__)
47: # define __P(args) args
48: # else
49: # define __P(args) ()
50: # endif
51: #endif /* __P */
52:
53: /*
54: * Some systems (ie ISC V/386) do not define MAXPATHLEN even in param.h
55: */
56: #ifndef MAXPATHLEN
57: # define MAXPATHLEN 1024
58: #endif
59:
60: /*
61: * Some systems do not define MAXHOSTNAMELEN.
62: */
63: #ifndef MAXHOSTNAMELEN
64: # define MAXHOSTNAMELEN 64
65: #endif
66:
67: /*
68: * 4.2BSD lacks FD_* macros (we only use FD_SET and FD_ZERO)
69: */
70: #ifndef FD_SETSIZE
71: # define FD_SET(fd, fds) ((fds) -> fds_bits[0] |= (1 << (fd)))
72: # define FD_ZERO(fds) ((fds) -> fds_bits[0] = 0)
73: #endif /* !FD_SETSIZE */
74:
75: /*
76: * Posix versions for those without...
77: */
78: #ifndef _S_IFMT
79: # define _S_IFMT S_IFMT
80: #endif /* _S_IFMT */
81: #ifndef _S_IFREG
82: # define _S_IFREG S_IFREG
83: #endif /* _S_IFREG */
84: #ifndef _S_IFDIR
85: # define _S_IFDIR S_IFDIR
86: #endif /* _S_IFDIR */
87: #ifndef _S_IFLNK
88: # define _S_IFLNK S_IFLNK
89: #endif /* _S_IFLNK */
90: #ifndef S_ISREG
91: # define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)
92: #endif /* S_ISREG */
93: #ifndef S_ISDIR
94: # define S_ISDIR(m) (((m) & _S_IFMT) == _S_IFDIR)
95: #endif /* S_ISDIR */
96:
97: /*
98: * Some OS's may not have this.
99: */
100: #ifndef S_IRWXU
101: # define S_IRWXU 0000700 /* rwx for owner */
102: #endif /* S_IRWXU */
103:
104: /*
105: * In case this is not defined in <sys/types.h> or <sys/select.h>
106: */
107: #ifndef howmany
108: # define howmany(x, y) (((x) + ((y) - 1)) / (y))
109: #endif
110:
111: /*
112: * These should be defined in <unistd.h> but not everyone has them.
113: */
114: #ifndef STDIN_FILENO
115: # define STDIN_FILENO 0
116: #endif
117: #ifndef STDOUT_FILENO
118: # define STDOUT_FILENO 1
119: #endif
120: #ifndef STDERR_FILENO
121: # define STDERR_FILENO 2
122: #endif
123:
124: /*
125: * These should be defined in <unistd.h> but not everyone has them.
126: */
127: #ifndef SEEK_SET
128: # define SEEK_SET 0
129: #endif
130: #ifndef SEEK_CUR
131: # define SEEK_CUR 1
132: #endif
133: #ifndef SEEK_END
134: # define SEEK_END 2
135: #endif
136:
137: /*
138: * BSD defines these in <sys/param.h> but others may not.
139: */
140: #ifndef MIN
141: # define MIN(a,b) (((a)<(b))?(a):(b))
142: #endif
143: #ifndef MAX
144: # define MAX(a,b) (((a)>(b))?(a):(b))
145: #endif
146:
147: /*
1.2 ! millert 148: * Simple isblank() macro for systems without it.
! 149: */
! 150: #ifndef HAVE_ISBLANK
! 151: # define isblank(_x) ((_x) == ' ' || (_x) == '\t')
! 152: #endif
! 153:
! 154: /*
! 155: * Old BSD systems lack strchr(), strrchr(), memset() and memcpy()
! 156: */
! 157: #if !defined(HAVE_STRCHR) && !defined(strchr)
! 158: # define strchr(_s, _c) index(_s, _c)
! 159: #endif
! 160: #if !defined(HAVE_STRRCHR) && !defined(strrchr)
! 161: # define strrchr(_s, _c) rindex(_s, _c)
! 162: #endif
! 163: #if !defined(HAVE_MEMCPY) && !defined(memcpy)
! 164: # define memcpy(_d, _s, _n) (bcopy(_s, _d, _n))
! 165: #endif
! 166: #if !defined(HAVE_MEMSET) && !defined(memset)
! 167: # define memset(_s, _x, _n) (bzero(_s, _n))
! 168: #endif
! 169:
! 170: /*
! 171: * Emulate sete[ug]id() via setres[ug]id(2) or setre[ug]id(2)
1.1 millert 172: */
173: #ifndef HAVE_SETEUID
174: # ifdef __hpux
175: # define seteuid(_EUID) (setresuid((uid_t) -1, _EUID, (uid_t) -1))
176: # else
177: # define seteuid(_EUID) (setreuid((uid_t) -1, _EUID))
178: # endif /* __hpux */
179: #endif /* HAVE_SETEUID */
1.2 ! millert 180: #ifndef HAVE_SETEGID
! 181: # ifdef __hpux
! 182: # define setegid(_EGID) (setresgid((gid_t) -1, _EGID, (gid_t) -1))
! 183: # else
! 184: # define setegid(_EGID) (setregid((gid_t) -1, _EGID))
! 185: # endif /* __hpux */
! 186: #endif /* HAVE_SETEGID */
! 187:
! 188: /*
! 189: * Emulate setreuid() for HP-UX via setresuid(2)
! 190: */
! 191: #if !defined(HAVE_SETREUID) && defined(__hpux)
! 192: # define setreuid(_RUID, _EUID) (setresuid(_RUID, _EUID, (uid_t) -1))
! 193: # define HAVE_SETREUID
! 194: #endif /* !HAVE_SETEUID && __hpux */
! 195:
! 196: /*
! 197: * NCR's SVr4 has _innetgr(3) instead of innetgr(3) for some reason.
! 198: */
! 199: #ifdef HAVE__INNETGR
! 200: # define innetgr(n, h, u, d) (_innetgr(n, h, u, d))
! 201: # define HAVE_INNETGR 1
! 202: #endif /* HAVE__INNETGR */
1.1 millert 203:
204: /*
205: * On POSIX systems, O_NOCTTY is the default so some OS's may lack this define.
206: */
207: #ifndef O_NOCTTY
208: # define O_NOCTTY 0
209: #endif /* O_NOCTTY */
1.2 ! millert 210:
! 211: /*
! 212: * Emulate POSIX signals via sigvec(2)
! 213: */
! 214: #ifndef HAVE_SIGACTION
! 215: # define SA_ONSTACK SV_ONSTACK
! 216: # define SA_RESTART SV_INTERRUPT /* opposite effect */
! 217: # define SA_RESETHAND SV_RESETHAND
! 218: # define sa_handler sv_handler
! 219: # define sa_mask sv_mask
! 220: # define sa_flags sv_flags
! 221: typedef struct sigvec sigaction_t;
! 222: typedef int sigset_t;
! 223: int sigaction __P((int sig, const sigaction_t *act, sigaction_t *oact));
! 224: int sigemptyset __P((sigset_t *));
! 225: int sigfillset __P((sigset_t *));
! 226: int sigaddset __P((sigset_t *, int));
! 227: int sigdelset __P((sigset_t *, int));
! 228: int sigismember __P((sigset_t *, int));
! 229: int sigprocmask __P((int, const sigset_t *, sigset_t *));
! 230: #endif
! 231:
! 232: /*
! 233: * Extra sugar for POSIX signals to deal with the above emulation
! 234: * as well as the fact that SunOS has a SA_INTERRUPT flag.
! 235: */
! 236: #ifdef HAVE_SIGACTION
! 237: # ifndef HAVE_SIGACTION_T
! 238: typedef struct sigaction sigaction_t;
! 239: # endif
! 240: # ifndef SA_INTERRUPT
! 241: # define SA_INTERRUPT 0
! 242: # endif
! 243: # ifndef SA_RESTART
! 244: # define SA_RESTART 0
! 245: # endif
! 246: #endif
1.1 millert 247:
248: #endif /* _SUDO_COMPAT_H */
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