sys/sys/unistd.h

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  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  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)unistd.h    8.2 (Berkeley) 1/7/94
  34  * $FreeBSD: src/sys/sys/unistd.h,v 1.22.2.2 2000/08/22 01:46:30 jhb Exp $
  35  * $DragonFly: src/sys/sys/unistd.h,v 1.9 2008/02/21 12:47:54 hasso Exp $
  36  */
  37
  38 #ifndef _SYS_UNISTD_H_
  39 #define _SYS_UNISTD_H_
  40
  41 #include <sys/types.h>
  42 #include <sys/_posix.h>
  43
  44 /* compile-time symbolic constants */
  45 #define _POSIX_JOB_CONTROL      /* implementation supports job control */
  46
  47 /*
  48  * Although we have saved user/group IDs, we do not use them in setuid
  49  * as described in POSIX 1003.1, because the feature does not work for
  50  * root.  We use the saved IDs in seteuid/setegid, which are not currently
  51  * part of the POSIX 1003.1 specification.
  52  */
  53 #ifdef  _NOT_AVAILABLE
  54 #define _POSIX_SAVED_IDS        /* saved set-user-ID and set-group-ID */
  55 #endif
  56
  57 #define _POSIX2_VERSION         199212L
  58
  59 /* execution-time symbolic constants */
  60                                 /* chown requires appropriate privileges */
  61 #define _POSIX_CHOWN_RESTRICTED 1
  62                                 /* too-long path components generate errors */
  63 #define _POSIX_NO_TRUNC         1
  64                                 /* may disable terminal special characters */
  65 #define _POSIX_VDISABLE         0xff
  66
  67 /*
  68  * Threads features:
  69  *
  70  * Note that those commented out are not currently supported by the
  71  * implementation.
  72  */
  73 #define _POSIX_THREADS                          200112L
  74 #define _POSIX_THREAD_ATTR_STACKADDR            200112L
  75 #define _POSIX_THREAD_ATTR_STACKSIZE            200112L
  76 #define _POSIX_THREAD_PRIORITY_SCHEDULING       200112L
  77 #define _POSIX_THREAD_PRIO_INHERIT              200112L
  78 #define _POSIX_THREAD_PRIO_PROTECT              200112L
  79 /* #define _POSIX_THREAD_PROCESS_SHARED */
  80 /*
  81  * 1003.1c-1995 says on page 38 (2.9.3, paragraph 3) that if _POSIX_THREADS is
  82  * defined, then _POSIX_THREAD_SAFE_FUNCTIONS must also be defined.  (This is
  83  * likely a typo (reversed dependency), in which case we would be compliant if
  84  * the typo were officially acknowledged.)  However, we do not support all of
  85  * the required _r() interfaces, which means we cannot legitimately define
  86  * _POSIX_THREAD_SAFE_FUNCTIONS.  Therefore, we are non-compliant here in two
  87  * ways.
  88  */
  89 /* #define _POSIX_THREAD_SAFE_FUNCTIONS */
  90 #define _POSIX_SEMAPHORES       200112L
  91
  92 /* access function */
  93 #define F_OK            0       /* test for existence of file */
  94 #define X_OK            0x01    /* test for execute or search permission */
  95 #define W_OK            0x02    /* test for write permission */
  96 #define R_OK            0x04    /* test for read permission */
  97
  98 /* whence values for lseek(2) */
  99 #define SEEK_SET        0       /* set file offset to offset */
 100 #define SEEK_CUR        1       /* set file offset to current plus offset */
 101 #define SEEK_END        2       /* set file offset to EOF plus offset */
 102
 103 #ifndef _POSIX_SOURCE
 104 /* whence values for lseek(2); renamed by POSIX 1003.1 */
 105 #define L_SET           SEEK_SET
 106 #define L_INCR          SEEK_CUR
 107 #define L_XTND          SEEK_END
 108 #endif
 109
 110 /* configurable pathname variables */
 111 #define _PC_LINK_MAX             1
 112 #define _PC_MAX_CANON            2
 113 #define _PC_MAX_INPUT            3
 114 #define _PC_NAME_MAX             4
 115 #define _PC_PATH_MAX             5
 116 #define _PC_PIPE_BUF             6
 117 #define _PC_CHOWN_RESTRICTED     7
 118 #define _PC_NO_TRUNC             8
 119 #define _PC_VDISABLE             9
 120
 121 /* configurable system variables */
 122 #define _SC_ARG_MAX              1
 123 #define _SC_CHILD_MAX            2
 124 #define _SC_CLK_TCK              3
 125 #define _SC_NGROUPS_MAX          4
 126 #define _SC_OPEN_MAX             5
 127 #define _SC_JOB_CONTROL          6
 128 #define _SC_SAVED_IDS            7
 129 #define _SC_VERSION              8
 130 #define _SC_BC_BASE_MAX          9
 131 #define _SC_BC_DIM_MAX          10
 132 #define _SC_BC_SCALE_MAX        11
 133 #define _SC_BC_STRING_MAX       12
 134 #define _SC_COLL_WEIGHTS_MAX    13
 135 #define _SC_EXPR_NEST_MAX       14
 136 #define _SC_LINE_MAX            15
 137 #define _SC_RE_DUP_MAX          16
 138 #define _SC_2_VERSION           17
 139 #define _SC_2_C_BIND            18
 140 #define _SC_2_C_DEV             19
 141 #define _SC_2_CHAR_TERM         20
 142 #define _SC_2_FORT_DEV          21
 143 #define _SC_2_FORT_RUN          22
 144 #define _SC_2_LOCALEDEF         23
 145 #define _SC_2_SW_DEV            24
 146 #define _SC_2_UPE               25
 147 #define _SC_STREAM_MAX          26
 148 #define _SC_TZNAME_MAX          27
 149 #define _SC_IOV_MAX             56
 150
 151 /* configurable system strings */
 152 #define _CS_PATH                 1
 153
 154 #ifdef _P1003_1B_VISIBLE
 155
 156 #define _POSIX_PRIORITY_SCHEDULING 200112L
 157
 158 #if 0
 159 /* Not until the dust settles after the header commit
 160  */
 161 #define _POSIX_ASYNCHRONOUS_IO
 162 #define _POSIX_MEMLOCK
 163 #define _POSIX_MEMLOCK_RANGE
 164 #endif
 165
 166 /* ??? #define  _POSIX_FSYNC                    1 */
 167 #define _POSIX_MAPPED_FILES             200112L
 168 #define _POSIX_SHARED_MEMORY_OBJECTS    200112L
 169
 170 /* POSIX.1B sysconf options */
 171 #define _SC_ASYNCHRONOUS_IO     28
 172 #define _SC_MAPPED_FILES        29
 173 #define _SC_MEMLOCK             30
 174 #define _SC_MEMLOCK_RANGE       31
 175 #define _SC_MEMORY_PROTECTION   32
 176 #define _SC_MESSAGE_PASSING     33
 177 #define _SC_PRIORITIZED_IO      34
 178 #define _SC_PRIORITY_SCHEDULING 35
 179 #define _SC_REALTIME_SIGNALS    36
 180 #define _SC_SEMAPHORES          37
 181 #define _SC_FSYNC               38
 182 #define _SC_SHARED_MEMORY_OBJECTS 39
 183 #define _SC_SYNCHRONIZED_IO     40
 184 #define _SC_TIMERS              41
 185 #define _SC_AIO_LISTIO_MAX      42
 186 #define _SC_AIO_MAX             43
 187 #define _SC_AIO_PRIO_DELTA_MAX  44
 188 #define _SC_DELAYTIMER_MAX      45
 189 #define _SC_MQ_OPEN_MAX         46
 190 #define _SC_PAGESIZE            47
 191 #define _SC_RTSIG_MAX           48
 192 #define _SC_SEM_NSEMS_MAX       49
 193 #define _SC_SEM_VALUE_MAX       50
 194 #define _SC_SIGQUEUE_MAX        51
 195 #define _SC_TIMER_MAX           52
 196
 197 /* POSIX.1B pathconf and fpathconf options */
 198 #define _PC_ASYNC_IO            53
 199 #define _PC_PRIO_IO             54
 200 #define _PC_SYNC_IO             55
 201
 202 #endif /* _P1003_1B_VISIBLE */
 203
 204 #define _SC_NPROCESSORS_CONF    57
 205 #define _SC_NPROCESSORS_ONLN    58
 206
 207 #ifndef _POSIX_SOURCE
 208 /*
 209  * rfork() options.
 210  *
 211  * XXX currently, operations without RFPROC set are not supported.
 212  */
 213 #define RFNAMEG         (1<<0)  /* UNIMPL new plan9 `name space' */
 214 #define RFENVG          (1<<1)  /* UNIMPL copy plan9 `env space' */
 215 #define RFFDG           (1<<2)  /* copy fd table */
 216 #define RFNOTEG         (1<<3)  /* UNIMPL create new plan9 `note group' */
 217 #define RFPROC          (1<<4)  /* change child (else changes curproc) */
 218 #define RFMEM           (1<<5)  /* share `address space' */
 219 #define RFNOWAIT        (1<<6)  /* parent need not wait() on child */
 220 #define RFCNAMEG        (1<<10) /* UNIMPL zero plan9 `name space' */
 221 #define RFCENVG         (1<<11) /* UNIMPL zero plan9 `env space' */
 222 #define RFCFDG          (1<<12) /* zero fd table */
 223 #define RFTHREAD        (1<<13) /* enable kernel thread support */
 224 #define RFSIGSHARE      (1<<14) /* share signal handlers */
 225 #define RFLINUXTHPN     (1<<16) /* do linux clone exit parent notification */
 226 #define RFPGLOCK        (1<<30) /* process group interlock for signal race */
 227 #define RFPPWAIT        (1<<31) /* parent sleeps until child exits (vfork) */
 228 #define RFKERNELONLY    (RFPPWAIT|RFPGLOCK)
 229
 230 /*
 231  * Extended exit extexit() operation modes.
 232  */
 233 /* Types of action to communicate exit */
 234 #define EXTEXIT_SIMPLE  0
 235 #define EXTEXIT_SETINT  1
 236 #define EXTEXIT_ACTION(f) ((f) & 0xffff)
 237 /* Types describing what to exit */
 238 #define EXTEXIT_PROC    (0<<16)
 239 #define EXTEXIT_LWP     (1<<16)
 240 #define EXTEXIT_WHO(f)  ((f) & (0xffff<<16))
 241
 242
 243 /*
 244  * Parameters for the creation of a new lwp.
 245  */
 246 struct lwp_params {
 247         void (*func)(void *);   /* Function to start execution */
 248         void *arg;              /* Parameter to this function */
 249         void *stack;            /* Stack address to use */
 250         lwpid_t *tid1;          /* Address to copy out new tid */
 251         lwpid_t *tid2;          /* Same */
 252 };
 253
 254 #endif /* !_POSIX_SOURCE */
 255
 256 #endif /* !_SYS_UNISTD_H_ */