Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | 524b588 | 1995-01-04 19:10:35 +0000 | [diff] [blame] | 2 | Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
| 3 | The Netherlands. |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 4 | |
| 5 | All Rights Reserved |
| 6 | |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 7 | Permission to use, copy, modify, and distribute this software and its |
| 8 | documentation for any purpose and without fee is hereby granted, |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 9 | provided that the above copyright notice appear in all copies and that |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 10 | both that copyright notice and this permission notice appear in |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 11 | supporting documentation, and that the names of Stichting Mathematisch |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 12 | Centrum or CWI or Corporation for National Research Initiatives or |
| 13 | CNRI not be used in advertising or publicity pertaining to |
| 14 | distribution of the software without specific, written prior |
| 15 | permission. |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 16 | |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 17 | While CWI is the initial source for this software, a modified version |
| 18 | is made available by the Corporation for National Research Initiatives |
| 19 | (CNRI) at the Internet address ftp://ftp.python.org. |
| 20 | |
| 21 | STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH |
| 22 | REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF |
| 23 | MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH |
| 24 | CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL |
| 25 | DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 26 | PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 27 | TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 28 | PERFORMANCE OF THIS SOFTWARE. |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 29 | |
| 30 | ******************************************************************/ |
| 31 | |
| 32 | /* fcntl module */ |
| 33 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 34 | #include "Python.h" |
| 35 | /*#include "modsupport.h"*/ |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 36 | |
Guido van Rossum | a376cc5 | 1996-12-05 23:43:35 +0000 | [diff] [blame] | 37 | #ifdef HAVE_UNISTD_H |
| 38 | #include <unistd.h> |
| 39 | #endif |
| 40 | |
| 41 | #ifdef HAVE_SYS_FILE_H |
| 42 | #include <sys/file.h> |
| 43 | #endif |
| 44 | |
Guido van Rossum | 3d65fa3 | 1996-12-09 18:49:14 +0000 | [diff] [blame] | 45 | #include <sys/ioctl.h> |
Guido van Rossum | 3c0b79c | 1996-06-11 15:11:34 +0000 | [diff] [blame] | 46 | #include <fcntl.h> |
| 47 | |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 48 | |
| 49 | /* fcntl(fd, opt, [arg]) */ |
| 50 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 51 | static PyObject * |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 52 | fcntl_fcntl(self, args) |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 53 | PyObject *self; /* Not used */ |
| 54 | PyObject *args; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 55 | { |
| 56 | int fd; |
| 57 | int code; |
| 58 | int arg; |
| 59 | int ret; |
| 60 | char *str; |
| 61 | int len; |
| 62 | char buf[1024]; |
| 63 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 64 | if (PyArg_Parse(args, "(iis#)", &fd, &code, &str, &len)) { |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 65 | if (len > sizeof buf) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 66 | PyErr_SetString(PyExc_ValueError, |
| 67 | "fcntl string arg too long"); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 68 | return NULL; |
| 69 | } |
| 70 | memcpy(buf, str, len); |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 71 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | 903f487 | 1995-10-07 19:18:22 +0000 | [diff] [blame] | 72 | ret = fcntl(fd, code, buf); |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 73 | Py_END_ALLOW_THREADS |
Guido van Rossum | 903f487 | 1995-10-07 19:18:22 +0000 | [diff] [blame] | 74 | if (ret < 0) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 75 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 76 | return NULL; |
| 77 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 78 | return PyString_FromStringAndSize(buf, len); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 79 | } |
| 80 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 81 | PyErr_Clear(); |
| 82 | if (PyArg_Parse(args, "(ii)", &fd, &code)) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 83 | arg = 0; |
| 84 | else { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 85 | PyErr_Clear(); |
| 86 | if (!PyArg_Parse(args, "(iii)", &fd, &code, &arg)) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 87 | return NULL; |
| 88 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 89 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 90 | ret = fcntl(fd, code, arg); |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 91 | Py_END_ALLOW_THREADS |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 92 | if (ret < 0) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 93 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 94 | return NULL; |
| 95 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 96 | return PyInt_FromLong((long)ret); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | |
| 100 | /* ioctl(fd, opt, [arg]) */ |
| 101 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 102 | static PyObject * |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 103 | fcntl_ioctl(self, args) |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 104 | PyObject *self; /* Not used */ |
| 105 | PyObject *args; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 106 | { |
| 107 | int fd; |
| 108 | int code; |
| 109 | int arg; |
| 110 | int ret; |
| 111 | char *str; |
| 112 | int len; |
| 113 | char buf[1024]; |
| 114 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 115 | if (PyArg_Parse(args, "(iis#)", &fd, &code, &str, &len)) { |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 116 | if (len > sizeof buf) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 117 | PyErr_SetString(PyExc_ValueError, |
| 118 | "ioctl string arg too long"); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 119 | return NULL; |
| 120 | } |
| 121 | memcpy(buf, str, len); |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 122 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | 903f487 | 1995-10-07 19:18:22 +0000 | [diff] [blame] | 123 | ret = ioctl(fd, code, buf); |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 124 | Py_END_ALLOW_THREADS |
Guido van Rossum | 903f487 | 1995-10-07 19:18:22 +0000 | [diff] [blame] | 125 | if (ret < 0) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 126 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 127 | return NULL; |
| 128 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 129 | return PyString_FromStringAndSize(buf, len); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 130 | } |
| 131 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 132 | PyErr_Clear(); |
| 133 | if (PyArg_Parse(args, "(ii)", &fd, &code)) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 134 | arg = 0; |
| 135 | else { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 136 | PyErr_Clear(); |
| 137 | if (!PyArg_Parse(args, "(iii)", &fd, &code, &arg)) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 138 | return NULL; |
| 139 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 140 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 141 | ret = ioctl(fd, code, arg); |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 142 | Py_END_ALLOW_THREADS |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 143 | if (ret < 0) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 144 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 145 | return NULL; |
| 146 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 147 | return PyInt_FromLong((long)ret); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 151 | /* flock(fd, operation) */ |
| 152 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 153 | static PyObject * |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 154 | fcntl_flock(self, args) |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 155 | PyObject *self; /* Not used */ |
| 156 | PyObject *args; |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 157 | { |
| 158 | int fd; |
| 159 | int code; |
| 160 | int ret; |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 161 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 162 | if (!PyArg_Parse(args, "(ii)", &fd, &code)) |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 163 | return NULL; |
| 164 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 165 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | 3c0b79c | 1996-06-11 15:11:34 +0000 | [diff] [blame] | 166 | #ifdef HAVE_FLOCK |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 167 | ret = flock(fd, code); |
Guido van Rossum | 3c0b79c | 1996-06-11 15:11:34 +0000 | [diff] [blame] | 168 | #else |
| 169 | |
| 170 | #ifndef LOCK_SH |
| 171 | #define LOCK_SH 1 /* shared lock */ |
| 172 | #define LOCK_EX 2 /* exclusive lock */ |
| 173 | #define LOCK_NB 4 /* don't block when locking */ |
| 174 | #define LOCK_UN 8 /* unlock */ |
| 175 | #endif |
| 176 | { |
| 177 | struct flock l; |
| 178 | if (code == LOCK_UN) |
| 179 | l.l_type = F_UNLCK; |
| 180 | else if (code & LOCK_SH) |
| 181 | l.l_type = F_RDLCK; |
| 182 | else if (code & LOCK_EX) |
| 183 | l.l_type = F_WRLCK; |
| 184 | else { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 185 | PyErr_SetString(PyExc_ValueError, |
| 186 | "unrecognized flock argument"); |
Guido van Rossum | 3c0b79c | 1996-06-11 15:11:34 +0000 | [diff] [blame] | 187 | return NULL; |
| 188 | } |
| 189 | l.l_whence = l.l_start = l.l_len = 0; |
| 190 | ret = fcntl(fd, (code & LOCK_NB) ? F_SETLK : F_SETLKW, &l); |
| 191 | } |
| 192 | #endif /* HAVE_FLOCK */ |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 193 | Py_END_ALLOW_THREADS |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 194 | if (ret < 0) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 195 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 196 | return NULL; |
| 197 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 198 | Py_INCREF(Py_None); |
| 199 | return Py_None; |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 200 | } |
| 201 | |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 202 | /* lockf(fd, operation) */ |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 203 | static PyObject * |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 204 | fcntl_lockf(self, args) |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 205 | PyObject *self; /* Not used */ |
| 206 | PyObject *args; |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 207 | { |
| 208 | int fd, code, len = 0, start = 0, whence = 0, ret; |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 209 | |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 210 | if (!PyArg_ParseTuple(args, "ii|iii", &fd, &code, &len, |
| 211 | &start, &whence)) |
| 212 | return NULL; |
| 213 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 214 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 215 | #ifndef LOCK_SH |
| 216 | #define LOCK_SH 1 /* shared lock */ |
| 217 | #define LOCK_EX 2 /* exclusive lock */ |
| 218 | #define LOCK_NB 4 /* don't block when locking */ |
| 219 | #define LOCK_UN 8 /* unlock */ |
| 220 | #endif |
| 221 | { |
| 222 | struct flock l; |
| 223 | if (code == LOCK_UN) |
| 224 | l.l_type = F_UNLCK; |
| 225 | else if (code & LOCK_SH) |
| 226 | l.l_type = F_RDLCK; |
| 227 | else if (code & LOCK_EX) |
| 228 | l.l_type = F_WRLCK; |
| 229 | else { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 230 | PyErr_SetString(PyExc_ValueError, |
| 231 | "unrecognized flock argument"); |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 232 | return NULL; |
| 233 | } |
| 234 | l.l_len = len; |
| 235 | l.l_start = start; |
| 236 | l.l_whence = whence; |
| 237 | ret = fcntl(fd, (code & LOCK_NB) ? F_SETLK : F_SETLKW, &l); |
| 238 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 239 | Py_END_ALLOW_THREADS |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 240 | if (ret < 0) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 241 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 242 | return NULL; |
| 243 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 244 | Py_INCREF(Py_None); |
| 245 | return Py_None; |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 246 | } |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 247 | |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 248 | /* List of functions */ |
| 249 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 250 | static PyMethodDef fcntl_methods[] = { |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 251 | {"fcntl", fcntl_fcntl}, |
| 252 | {"ioctl", fcntl_ioctl}, |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 253 | {"flock", fcntl_flock}, |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 254 | {"lockf", fcntl_lockf, 1}, |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 255 | {NULL, NULL} /* sentinel */ |
| 256 | }; |
| 257 | |
| 258 | |
| 259 | /* Module initialisation */ |
| 260 | |
| 261 | void |
| 262 | initfcntl() |
| 263 | { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 264 | PyObject *m, *d; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 265 | |
| 266 | /* Create the module and add the functions */ |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 267 | m = Py_InitModule("fcntl", fcntl_methods); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 268 | |
| 269 | /* Add some symbolic constants to the module */ |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 270 | d = PyModule_GetDict(m); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 271 | |
| 272 | /* Check for errors */ |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame^] | 273 | if (PyErr_Occurred()) |
| 274 | Py_FatalError("can't initialize module fcntl"); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 275 | } |