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- /***********************************************************
- Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
- The Netherlands.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the names of Stichting Mathematisch
- Centrum or CWI or Corporation for National Research Initiatives or
- CNRI not be used in advertising or publicity pertaining to
- distribution of the software without specific, written prior
- permission.
-
- While CWI is the initial source for this software, a modified version
- is made available by the Corporation for National Research Initiatives
- (CNRI) at the Internet address ftp://ftp.python.org.
-
- STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
- REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
- MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
- CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
- DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- PERFORMANCE OF THIS SOFTWARE.
-
- ******************************************************************/
-
- /* fcntl module */
-
- #include "allobjects.h"
- #include "modsupport.h"
-
- #include <fcntl.h>
-
-
- /* fcntl(fd, opt, [arg]) */
-
- static object *
- fcntl_fcntl(self, args)
- object *self; /* Not used */
- object *args;
- {
- int fd;
- int code;
- int arg;
- int ret;
- char *str;
- int len;
- char buf[1024];
-
- if (getargs(args, "(iis#)", &fd, &code, &str, &len)) {
- if (len > sizeof buf) {
- err_setstr(ValueError, "fcntl string arg too long");
- return NULL;
- }
- memcpy(buf, str, len);
- BGN_SAVE
- ret = fcntl(fd, code, buf);
- END_SAVE
- if (ret < 0) {
- err_errno(IOError);
- return NULL;
- }
- return newsizedstringobject(buf, len);
- }
-
- err_clear();
- if (getargs(args, "(ii)", &fd, &code))
- arg = 0;
- else {
- err_clear();
- if (!getargs(args, "(iii)", &fd, &code, &arg))
- return NULL;
- }
- BGN_SAVE
- ret = fcntl(fd, code, arg);
- END_SAVE
- if (ret < 0) {
- err_errno(IOError);
- return NULL;
- }
- return newintobject((long)ret);
- }
-
-
- /* ioctl(fd, opt, [arg]) */
-
- static object *
- fcntl_ioctl(self, args)
- object *self; /* Not used */
- object *args;
- {
- int fd;
- int code;
- int arg;
- int ret;
- char *str;
- int len;
- char buf[1024];
-
- if (getargs(args, "(iis#)", &fd, &code, &str, &len)) {
- if (len > sizeof buf) {
- err_setstr(ValueError, "ioctl string arg too long");
- return NULL;
- }
- memcpy(buf, str, len);
- BGN_SAVE
- ret = ioctl(fd, code, buf);
- END_SAVE
- if (ret < 0) {
- err_errno(IOError);
- return NULL;
- }
- return newsizedstringobject(buf, len);
- }
-
- err_clear();
- if (getargs(args, "(ii)", &fd, &code))
- arg = 0;
- else {
- err_clear();
- if (!getargs(args, "(iii)", &fd, &code, &arg))
- return NULL;
- }
- BGN_SAVE
- ret = ioctl(fd, code, arg);
- END_SAVE
- if (ret < 0) {
- err_errno(IOError);
- return NULL;
- }
- return newintobject((long)ret);
- }
-
-
- /* flock(fd, operation) */
-
- static object *
- fcntl_flock(self, args)
- object *self; /* Not used */
- object *args;
- {
- int fd;
- int code;
- int ret;
- FILE *f;
-
- if (!getargs(args, "(ii)", &fd, &code))
- return NULL;
-
- BGN_SAVE
- #ifdef HAVE_FLOCK
- ret = flock(fd, code);
- #else
-
- #ifndef LOCK_SH
- #define LOCK_SH 1 /* shared lock */
- #define LOCK_EX 2 /* exclusive lock */
- #define LOCK_NB 4 /* don't block when locking */
- #define LOCK_UN 8 /* unlock */
- #endif
- {
- struct flock l;
- if (code == LOCK_UN)
- l.l_type = F_UNLCK;
- else if (code & LOCK_SH)
- l.l_type = F_RDLCK;
- else if (code & LOCK_EX)
- l.l_type = F_WRLCK;
- else {
- err_setstr(ValueError, "unrecognized flock argument");
- return NULL;
- }
- l.l_whence = l.l_start = l.l_len = 0;
- ret = fcntl(fd, (code & LOCK_NB) ? F_SETLK : F_SETLKW, &l);
- }
- #endif /* HAVE_FLOCK */
- END_SAVE
- if (ret < 0) {
- err_errno(IOError);
- return NULL;
- }
- INCREF(None);
- return None;
- }
-
- /* lockf(fd, operation) */
- static object *
- fcntl_lockf(self, args)
- object *self; /* Not used */
- object *args;
- {
- int fd, code, len = 0, start = 0, whence = 0, ret;
- FILE *f;
-
- if (!PyArg_ParseTuple(args, "ii|iii", &fd, &code, &len,
- &start, &whence))
- return NULL;
-
- BGN_SAVE
- #ifndef LOCK_SH
- #define LOCK_SH 1 /* shared lock */
- #define LOCK_EX 2 /* exclusive lock */
- #define LOCK_NB 4 /* don't block when locking */
- #define LOCK_UN 8 /* unlock */
- #endif
- {
- struct flock l;
- if (code == LOCK_UN)
- l.l_type = F_UNLCK;
- else if (code & LOCK_SH)
- l.l_type = F_RDLCK;
- else if (code & LOCK_EX)
- l.l_type = F_WRLCK;
- else {
- err_setstr(ValueError, "unrecognized flock argument");
- return NULL;
- }
- l.l_len = len;
- l.l_start = start;
- l.l_whence = whence;
- ret = fcntl(fd, (code & LOCK_NB) ? F_SETLK : F_SETLKW, &l);
- }
- END_SAVE
- if (ret < 0) {
- err_errno(IOError);
- return NULL;
- }
- INCREF(None);
- return None;
- }
-
- /* List of functions */
-
- static struct methodlist fcntl_methods[] = {
- {"fcntl", fcntl_fcntl},
- {"ioctl", fcntl_ioctl},
- {"flock", fcntl_flock},
- {"lockf", fcntl_lockf, 1},
- {NULL, NULL} /* sentinel */
- };
-
-
- /* Module initialisation */
-
- void
- initfcntl()
- {
- object *m, *d;
-
- /* Create the module and add the functions */
- m = initmodule("fcntl", fcntl_methods);
-
- /* Add some symbolic constants to the module */
- d = getmoduledict(m);
-
- /* Check for errors */
- if (err_occurred())
- fatal("can't initialize module fcntl");
- }
-