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" |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 35 | |
Guido van Rossum | a376cc5 | 1996-12-05 23:43:35 +0000 | [diff] [blame] | 36 | #ifdef HAVE_UNISTD_H |
| 37 | #include <unistd.h> |
| 38 | #endif |
| 39 | |
| 40 | #ifdef HAVE_SYS_FILE_H |
| 41 | #include <sys/file.h> |
| 42 | #endif |
| 43 | |
Guido van Rossum | 3d65fa3 | 1996-12-09 18:49:14 +0000 | [diff] [blame] | 44 | #include <sys/ioctl.h> |
Guido van Rossum | 3c0b79c | 1996-06-11 15:11:34 +0000 | [diff] [blame] | 45 | #include <fcntl.h> |
| 46 | |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 47 | |
| 48 | /* fcntl(fd, opt, [arg]) */ |
| 49 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 50 | static PyObject * |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 51 | fcntl_fcntl(self, args) |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 52 | PyObject *self; /* Not used */ |
| 53 | PyObject *args; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 54 | { |
| 55 | int fd; |
| 56 | int code; |
| 57 | int arg; |
| 58 | int ret; |
| 59 | char *str; |
| 60 | int len; |
| 61 | char buf[1024]; |
| 62 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 63 | if (PyArg_Parse(args, "(iis#)", &fd, &code, &str, &len)) { |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 64 | if (len > sizeof buf) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 65 | PyErr_SetString(PyExc_ValueError, |
| 66 | "fcntl string arg too long"); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 67 | return NULL; |
| 68 | } |
| 69 | memcpy(buf, str, len); |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 70 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | 903f487 | 1995-10-07 19:18:22 +0000 | [diff] [blame] | 71 | ret = fcntl(fd, code, buf); |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 72 | Py_END_ALLOW_THREADS |
Guido van Rossum | 903f487 | 1995-10-07 19:18:22 +0000 | [diff] [blame] | 73 | if (ret < 0) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 74 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 75 | return NULL; |
| 76 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 77 | return PyString_FromStringAndSize(buf, len); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 78 | } |
| 79 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 80 | PyErr_Clear(); |
| 81 | if (PyArg_Parse(args, "(ii)", &fd, &code)) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 82 | arg = 0; |
| 83 | else { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 84 | PyErr_Clear(); |
| 85 | if (!PyArg_Parse(args, "(iii)", &fd, &code, &arg)) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 86 | return NULL; |
| 87 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 88 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 89 | ret = fcntl(fd, code, arg); |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 90 | Py_END_ALLOW_THREADS |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 91 | if (ret < 0) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 92 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 93 | return NULL; |
| 94 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 95 | return PyInt_FromLong((long)ret); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 96 | } |
| 97 | |
Guido van Rossum | 185ead6 | 1998-11-23 15:32:55 +0000 | [diff] [blame] | 98 | static char fcntl_doc [] = |
| 99 | |
| 100 | "fcntl(fd, opt, [arg])\n\ |
| 101 | \n\ |
| 102 | Perform the requested operation on file descriptor fd. The operation\n\ |
| 103 | is defined by op and is operating system dependent. Typically these\n\ |
| 104 | codes can be retrieved from the library module FCNTL. The argument arg\n\ |
| 105 | is optional, and defaults to 0; it may be an int or a string."; |
| 106 | |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 107 | |
| 108 | /* ioctl(fd, opt, [arg]) */ |
| 109 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 110 | static PyObject * |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 111 | fcntl_ioctl(self, args) |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 112 | PyObject *self; /* Not used */ |
| 113 | PyObject *args; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 114 | { |
| 115 | int fd; |
| 116 | int code; |
| 117 | int arg; |
| 118 | int ret; |
| 119 | char *str; |
| 120 | int len; |
| 121 | char buf[1024]; |
| 122 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 123 | if (PyArg_Parse(args, "(iis#)", &fd, &code, &str, &len)) { |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 124 | if (len > sizeof buf) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 125 | PyErr_SetString(PyExc_ValueError, |
| 126 | "ioctl string arg too long"); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 127 | return NULL; |
| 128 | } |
| 129 | memcpy(buf, str, len); |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 130 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | 903f487 | 1995-10-07 19:18:22 +0000 | [diff] [blame] | 131 | ret = ioctl(fd, code, buf); |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 132 | Py_END_ALLOW_THREADS |
Guido van Rossum | 903f487 | 1995-10-07 19:18:22 +0000 | [diff] [blame] | 133 | if (ret < 0) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 134 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 135 | return NULL; |
| 136 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 137 | return PyString_FromStringAndSize(buf, len); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 138 | } |
| 139 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 140 | PyErr_Clear(); |
| 141 | if (PyArg_Parse(args, "(ii)", &fd, &code)) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 142 | arg = 0; |
| 143 | else { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 144 | PyErr_Clear(); |
| 145 | if (!PyArg_Parse(args, "(iii)", &fd, &code, &arg)) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 146 | return NULL; |
| 147 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 148 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 149 | ret = ioctl(fd, code, arg); |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 150 | Py_END_ALLOW_THREADS |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 151 | if (ret < 0) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 152 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 153 | return NULL; |
| 154 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 155 | return PyInt_FromLong((long)ret); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 156 | } |
| 157 | |
Guido van Rossum | 185ead6 | 1998-11-23 15:32:55 +0000 | [diff] [blame] | 158 | static char ioctl_doc [] = |
| 159 | "ioctl(fd, opt, [arg])\n\ |
| 160 | \n\ |
| 161 | Perform the requested operation on file descriptor fd. The operation\n\ |
| 162 | is defined by op and is operating system dependent. Typically these\n\ |
| 163 | codes can be retrieved from the library module IOCTL. The argument arg\n\ |
| 164 | is optional, and defaults to 0; it may be an int or a string."; |
| 165 | |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 166 | |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 167 | /* flock(fd, operation) */ |
| 168 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 169 | static PyObject * |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 170 | fcntl_flock(self, args) |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 171 | PyObject *self; /* Not used */ |
| 172 | PyObject *args; |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 173 | { |
| 174 | int fd; |
| 175 | int code; |
| 176 | int ret; |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 177 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 178 | if (!PyArg_Parse(args, "(ii)", &fd, &code)) |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 179 | return NULL; |
| 180 | |
Guido van Rossum | 3c0b79c | 1996-06-11 15:11:34 +0000 | [diff] [blame] | 181 | #ifdef HAVE_FLOCK |
Guido van Rossum | 056bad9 | 1999-01-06 18:44:23 +0000 | [diff] [blame] | 182 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 183 | ret = flock(fd, code); |
Guido van Rossum | 056bad9 | 1999-01-06 18:44:23 +0000 | [diff] [blame] | 184 | Py_END_ALLOW_THREADS |
Guido van Rossum | 3c0b79c | 1996-06-11 15:11:34 +0000 | [diff] [blame] | 185 | #else |
| 186 | |
| 187 | #ifndef LOCK_SH |
| 188 | #define LOCK_SH 1 /* shared lock */ |
| 189 | #define LOCK_EX 2 /* exclusive lock */ |
| 190 | #define LOCK_NB 4 /* don't block when locking */ |
| 191 | #define LOCK_UN 8 /* unlock */ |
| 192 | #endif |
| 193 | { |
| 194 | struct flock l; |
| 195 | if (code == LOCK_UN) |
| 196 | l.l_type = F_UNLCK; |
| 197 | else if (code & LOCK_SH) |
| 198 | l.l_type = F_RDLCK; |
| 199 | else if (code & LOCK_EX) |
| 200 | l.l_type = F_WRLCK; |
| 201 | else { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 202 | PyErr_SetString(PyExc_ValueError, |
| 203 | "unrecognized flock argument"); |
Guido van Rossum | 3c0b79c | 1996-06-11 15:11:34 +0000 | [diff] [blame] | 204 | return NULL; |
| 205 | } |
| 206 | l.l_whence = l.l_start = l.l_len = 0; |
Guido van Rossum | 056bad9 | 1999-01-06 18:44:23 +0000 | [diff] [blame] | 207 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | 3c0b79c | 1996-06-11 15:11:34 +0000 | [diff] [blame] | 208 | ret = fcntl(fd, (code & LOCK_NB) ? F_SETLK : F_SETLKW, &l); |
Guido van Rossum | 056bad9 | 1999-01-06 18:44:23 +0000 | [diff] [blame] | 209 | Py_END_ALLOW_THREADS |
Guido van Rossum | 3c0b79c | 1996-06-11 15:11:34 +0000 | [diff] [blame] | 210 | } |
| 211 | #endif /* HAVE_FLOCK */ |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 212 | if (ret < 0) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 213 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 214 | return NULL; |
| 215 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 216 | Py_INCREF(Py_None); |
| 217 | return Py_None; |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 218 | } |
| 219 | |
Guido van Rossum | 185ead6 | 1998-11-23 15:32:55 +0000 | [diff] [blame] | 220 | static char flock_doc [] = |
| 221 | "flock(fd, operation)\n\ |
| 222 | \n\ |
| 223 | Perform the lock operation op on file descriptor fd. See the Unix \n\ |
| 224 | manual flock(3) for details. (On some systems, this function is\n\ |
| 225 | emulated using fcntl().)"; |
| 226 | |
| 227 | |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 228 | /* lockf(fd, operation) */ |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 229 | static PyObject * |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 230 | fcntl_lockf(self, args) |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 231 | PyObject *self; /* Not used */ |
| 232 | PyObject *args; |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 233 | { |
Guido van Rossum | 056bad9 | 1999-01-06 18:44:23 +0000 | [diff] [blame] | 234 | int fd, code, ret, whence = 0; |
| 235 | PyObject *lenobj = NULL, *startobj = NULL; |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 236 | |
Guido van Rossum | 056bad9 | 1999-01-06 18:44:23 +0000 | [diff] [blame] | 237 | if (!PyArg_ParseTuple(args, "ii|OOi", &fd, &code, |
| 238 | &lenobj, &startobj, &whence)) |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 239 | return NULL; |
| 240 | |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 241 | #ifndef LOCK_SH |
| 242 | #define LOCK_SH 1 /* shared lock */ |
| 243 | #define LOCK_EX 2 /* exclusive lock */ |
| 244 | #define LOCK_NB 4 /* don't block when locking */ |
| 245 | #define LOCK_UN 8 /* unlock */ |
| 246 | #endif |
| 247 | { |
| 248 | struct flock l; |
| 249 | if (code == LOCK_UN) |
| 250 | l.l_type = F_UNLCK; |
| 251 | else if (code & LOCK_SH) |
| 252 | l.l_type = F_RDLCK; |
| 253 | else if (code & LOCK_EX) |
| 254 | l.l_type = F_WRLCK; |
| 255 | else { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 256 | PyErr_SetString(PyExc_ValueError, |
| 257 | "unrecognized flock argument"); |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 258 | return NULL; |
| 259 | } |
Guido van Rossum | 056bad9 | 1999-01-06 18:44:23 +0000 | [diff] [blame] | 260 | l.l_start = l.l_len = 0; |
| 261 | if (startobj != NULL) { |
| 262 | #if !defined(HAVE_LARGEFILE_SUPPORT) |
| 263 | l.l_start = PyInt_AsLong(startobj); |
| 264 | #else |
| 265 | l.l_start = PyLong_Check(startobj) ? |
| 266 | PyLong_AsLongLong(startobj) : |
| 267 | PyInt_AsLong(startobj); |
| 268 | #endif |
| 269 | if (PyErr_Occurred()) |
| 270 | return NULL; |
| 271 | } |
| 272 | if (lenobj != NULL) { |
| 273 | #if !defined(HAVE_LARGEFILE_SUPPORT) |
| 274 | l.l_len = PyInt_AsLong(lenobj); |
| 275 | #else |
| 276 | l.l_len = PyLong_Check(lenobj) ? |
| 277 | PyLong_AsLongLong(lenobj) : |
| 278 | PyInt_AsLong(lenobj); |
| 279 | #endif |
| 280 | if (PyErr_Occurred()) |
| 281 | return NULL; |
| 282 | } |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 283 | l.l_whence = whence; |
Guido van Rossum | 056bad9 | 1999-01-06 18:44:23 +0000 | [diff] [blame] | 284 | Py_BEGIN_ALLOW_THREADS |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 285 | ret = fcntl(fd, (code & LOCK_NB) ? F_SETLK : F_SETLKW, &l); |
Guido van Rossum | 056bad9 | 1999-01-06 18:44:23 +0000 | [diff] [blame] | 286 | Py_END_ALLOW_THREADS |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 287 | } |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 288 | if (ret < 0) { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 289 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 290 | return NULL; |
| 291 | } |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 292 | Py_INCREF(Py_None); |
| 293 | return Py_None; |
Guido van Rossum | c864364 | 1996-09-11 23:17:20 +0000 | [diff] [blame] | 294 | } |
Guido van Rossum | 3539b1e | 1996-05-23 22:56:38 +0000 | [diff] [blame] | 295 | |
Guido van Rossum | 185ead6 | 1998-11-23 15:32:55 +0000 | [diff] [blame] | 296 | static char lockf_doc [] = |
| 297 | "lockf (fd, operation)\n\ |
| 298 | \n\ |
| 299 | This is a wrapper around the FCNTL.F_SETLK and FCNTL.F_SETLKW fcntl()\n\ |
| 300 | calls. See the Unix manual for details."; |
| 301 | |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 302 | /* List of functions */ |
| 303 | |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 304 | static PyMethodDef fcntl_methods[] = { |
Guido van Rossum | 185ead6 | 1998-11-23 15:32:55 +0000 | [diff] [blame] | 305 | {"fcntl", fcntl_fcntl, 0, fcntl_doc}, |
| 306 | {"ioctl", fcntl_ioctl, 0, ioctl_doc}, |
| 307 | {"flock", fcntl_flock, 0, flock_doc}, |
| 308 | {"lockf", fcntl_lockf, 1, lockf_doc}, |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 309 | {NULL, NULL} /* sentinel */ |
| 310 | }; |
| 311 | |
| 312 | |
Guido van Rossum | 185ead6 | 1998-11-23 15:32:55 +0000 | [diff] [blame] | 313 | static char module_doc [] = |
| 314 | |
| 315 | "This module performs file control and I/O control on file \n\ |
| 316 | descriptors. It is an interface to the fcntl() and ioctl() Unix\n\ |
| 317 | routines. File descriptors can be obtained with the fileno() method of\n\ |
| 318 | a file or socket object."; |
| 319 | |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 320 | /* Module initialisation */ |
| 321 | |
Guido van Rossum | f4e32c7 | 1997-07-31 19:39:54 +0000 | [diff] [blame] | 322 | static int |
| 323 | ins(d, symbol, value) |
| 324 | PyObject* d; |
| 325 | char* symbol; |
| 326 | long value; |
| 327 | { |
| 328 | PyObject* v = PyInt_FromLong(value); |
| 329 | if (!v || PyDict_SetItemString(d, symbol, v) < 0) |
| 330 | return -1; |
| 331 | |
| 332 | Py_DECREF(v); |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | static int |
| 337 | all_ins(d) |
| 338 | PyObject* d; |
| 339 | { |
| 340 | if (ins(d, "LOCK_SH", (long)LOCK_SH)) return -1; |
| 341 | if (ins(d, "LOCK_EX", (long)LOCK_EX)) return -1; |
| 342 | if (ins(d, "LOCK_NB", (long)LOCK_NB)) return -1; |
| 343 | if (ins(d, "LOCK_UN", (long)LOCK_UN)) return -1; |
Guido van Rossum | 7c14103 | 1997-08-15 02:52:08 +0000 | [diff] [blame] | 344 | return 0; |
Guido van Rossum | f4e32c7 | 1997-07-31 19:39:54 +0000 | [diff] [blame] | 345 | } |
| 346 | |
Guido van Rossum | 3886bb6 | 1998-12-04 18:50:17 +0000 | [diff] [blame] | 347 | DL_EXPORT(void) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 348 | initfcntl() |
| 349 | { |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 350 | PyObject *m, *d; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 351 | |
Guido van Rossum | 185ead6 | 1998-11-23 15:32:55 +0000 | [diff] [blame] | 352 | /* Create the module and add the functions and documentation */ |
| 353 | m = Py_InitModule3("fcntl", fcntl_methods, module_doc); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 354 | |
| 355 | /* Add some symbolic constants to the module */ |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 356 | d = PyModule_GetDict(m); |
Guido van Rossum | f4e32c7 | 1997-07-31 19:39:54 +0000 | [diff] [blame] | 357 | all_ins(d); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 358 | |
| 359 | /* Check for errors */ |
Roger E. Masse | 919213a | 1996-12-17 17:42:22 +0000 | [diff] [blame] | 360 | if (PyErr_Occurred()) |
| 361 | Py_FatalError("can't initialize module fcntl"); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 362 | } |