mirror of https://github.com/python/cpython.git
768 lines
14 KiB
C
768 lines
14 KiB
C
/***********************************************************
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Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
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Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* POSIX module implementation */
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#ifdef AMOEBA
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#define NO_LSTAT
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#define SYSV
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#endif
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#ifdef MSDOS
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#define NO_LSTAT
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#endif
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#include <signal.h>
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#include <string.h>
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#include <setjmp.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifdef SYSV
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#define UTIME_STRUCT
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#include <dirent.h>
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#define direct dirent
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#ifdef i386
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#define mode_t int
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#endif
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#else /* !SYSV */
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#ifndef MSDOS
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#include <sys/dir.h>
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#endif
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#endif /* !SYSV */
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#include "allobjects.h"
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#include "modsupport.h"
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extern char *strerror PROTO((int));
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/* Return a dictionary corresponding to the POSIX environment table */
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extern char **environ;
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static object *
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convertenviron()
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{
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object *d;
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char **e;
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d = newdictobject();
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if (d == NULL)
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return NULL;
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if (environ == NULL)
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return d;
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/* XXX This part ignores errors */
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for (e = environ; *e != NULL; e++) {
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object *v;
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char *p = strchr(*e, '=');
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if (p == NULL)
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continue;
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v = newstringobject(p+1);
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if (v == NULL)
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continue;
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*p = '\0';
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(void) dictinsert(d, *e, v);
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*p = '=';
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DECREF(v);
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}
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return d;
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}
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static object *PosixError; /* Exception posix.error */
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/* Set a POSIX-specific error from errno, and return NULL */
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static object *
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posix_error()
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{
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return err_errno(PosixError);
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}
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/* POSIX generic methods */
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static object *
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posix_1str(args, func)
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object *args;
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int (*func) FPROTO((const char *));
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{
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object *path1;
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if (!getstrarg(args, &path1))
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return NULL;
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if ((*func)(getstringvalue(path1)) < 0)
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return posix_error();
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INCREF(None);
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return None;
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}
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static object *
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posix_2str(args, func)
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object *args;
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int (*func) FPROTO((const char *, const char *));
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{
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object *path1, *path2;
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if (!getstrstrarg(args, &path1, &path2))
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return NULL;
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if ((*func)(getstringvalue(path1), getstringvalue(path2)) < 0)
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return posix_error();
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INCREF(None);
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return None;
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}
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static object *
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posix_strint(args, func)
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object *args;
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int (*func) FPROTO((const char *, int));
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{
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object *path1;
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int i;
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if (!getstrintarg(args, &path1, &i))
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return NULL;
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if ((*func)(getstringvalue(path1), i) < 0)
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return posix_error();
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INCREF(None);
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return None;
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}
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static object *
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posix_do_stat(self, args, statfunc)
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object *self;
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object *args;
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int (*statfunc) FPROTO((const char *, struct stat *));
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{
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struct stat st;
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object *path;
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object *v;
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if (!getstrarg(args, &path))
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return NULL;
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if ((*statfunc)(getstringvalue(path), &st) != 0)
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return posix_error();
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v = newtupleobject(10);
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if (v == NULL)
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return NULL;
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#define SET(i, st_member) settupleitem(v, i, newintobject((long)st.st_member))
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SET(0, st_mode);
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SET(1, st_ino);
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SET(2, st_dev);
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SET(3, st_nlink);
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SET(4, st_uid);
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SET(5, st_gid);
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SET(6, st_size);
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SET(7, st_atime);
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SET(8, st_mtime);
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SET(9, st_ctime);
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#undef SET
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if (err_occurred()) {
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DECREF(v);
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return NULL;
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}
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return v;
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}
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/* POSIX methods */
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static object *
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posix_chdir(self, args)
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object *self;
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object *args;
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{
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extern int chdir PROTO((const char *));
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return posix_1str(args, chdir);
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}
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static object *
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posix_chmod(self, args)
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object *self;
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object *args;
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{
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extern int chmod PROTO((const char *, mode_t));
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return posix_strint(args, chmod);
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}
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static object *
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posix_getcwd(self, args)
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object *self;
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object *args;
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{
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char buf[1026];
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extern char *getcwd PROTO((char *, int));
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if (!getnoarg(args))
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return NULL;
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if (getcwd(buf, sizeof buf) == NULL)
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return posix_error();
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return newstringobject(buf);
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}
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#ifndef MSDOS
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static object *
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posix_link(self, args)
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object *self;
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object *args;
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{
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extern int link PROTO((const char *, const char *));
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return posix_2str(args, link);
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}
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#endif /* !MSDOS */
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static object *
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posix_listdir(self, args)
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object *self;
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object *args;
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{
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object *name, *d, *v;
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#ifdef MSDOS
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struct ffblk ep;
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int rv;
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if (!getstrarg(args, &name))
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return NULL;
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if (findfirst((char *) getstringvalue(name), &ep, 0) == -1)
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return posix_error();
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if ((d = newlistobject(0)) == NULL)
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return NULL;
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do {
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v = newstringobject(ep.ff_name);
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if (v == NULL) {
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DECREF(d);
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d = NULL;
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break;
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}
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if (addlistitem(d, v) != 0) {
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DECREF(v);
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DECREF(d);
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d = NULL;
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break;
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}
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DECREF(v);
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} while ((rv = findnext(&ep)) == 0);
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#else /* !MSDOS */
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DIR *dirp;
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struct direct *ep;
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if (!getstrarg(args, &name))
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return NULL;
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if ((dirp = opendir(getstringvalue(name))) == NULL)
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return posix_error();
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if ((d = newlistobject(0)) == NULL) {
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closedir(dirp);
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return NULL;
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}
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while ((ep = readdir(dirp)) != NULL) {
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v = newstringobject(ep->d_name);
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if (v == NULL) {
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DECREF(d);
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d = NULL;
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break;
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}
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if (addlistitem(d, v) != 0) {
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DECREF(v);
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DECREF(d);
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d = NULL;
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break;
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}
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DECREF(v);
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}
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closedir(dirp);
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#endif /* !MSDOS */
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return d;
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}
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static object *
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posix_mkdir(self, args)
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object *self;
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object *args;
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{
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extern int mkdir PROTO((const char *, mode_t));
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return posix_strint(args, mkdir);
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}
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#ifdef i386
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int
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rename(from, to)
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char *from;
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char *to;
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{
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int status;
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/* XXX Shouldn't this unlink the destination first? */
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status = link(from, to);
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if (status != 0)
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return status;
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return unlink(from);
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}
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#endif /* i386 */
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static object *
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posix_rename(self, args)
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object *self;
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object *args;
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{
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extern int rename PROTO((const char *, const char *));
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return posix_2str(args, rename);
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}
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static object *
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posix_rmdir(self, args)
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object *self;
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object *args;
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{
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extern int rmdir PROTO((const char *));
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return posix_1str(args, rmdir);
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}
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static object *
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posix_stat(self, args)
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object *self;
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object *args;
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{
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extern int stat PROTO((const char *, struct stat *));
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return posix_do_stat(self, args, stat);
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}
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static object *
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posix_system(self, args)
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object *self;
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object *args;
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{
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object *command;
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int sts;
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if (!getstrarg(args, &command))
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return NULL;
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sts = system(getstringvalue(command));
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return newintobject((long)sts);
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}
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#ifndef MSDOS
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static object *
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posix_umask(self, args)
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object *self;
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object *args;
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{
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int i;
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if (!getintarg(args, &i))
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return NULL;
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i = umask(i);
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if (i < 0)
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return posix_error();
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return newintobject((long)i);
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}
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#endif /* !MSDOS */
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static object *
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posix_unlink(self, args)
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object *self;
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object *args;
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{
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extern int unlink PROTO((const char *));
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return posix_1str(args, unlink);
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}
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#ifdef UTIME_STRUCT
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#include <utime.h>
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#endif
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static object *
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posix_utime(self, args)
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object *self;
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object *args;
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{
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object *path;
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#ifdef UTIME_STRUCT
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struct utimbuf buf;
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#define ATIME buf.actime
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#define MTIME buf.modtime
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#define UTIME_ARG &buf
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#else
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time_t buf[2];
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#define ATIME buf[0]
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#define MTIME buf[1]
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#define UTIME_ARG buf
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#endif
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if (args == NULL || !is_tupleobject(args) || gettuplesize(args) != 2) {
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err_badarg();
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return NULL;
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}
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if (!getstrarg(gettupleitem(args, 0), &path) ||
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!getlonglongargs(gettupleitem(args, 1), &ATIME, &MTIME))
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return NULL;
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if (utime(getstringvalue(path), UTIME_ARG) < 0)
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return posix_error();
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INCREF(None);
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return None;
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#undef UTIME_ARG
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#undef ATIME
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#undef MTIME
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}
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#ifndef MSDOS
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/* Process operations */
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static object *
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posix__exit(self, args)
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object *self;
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object *args;
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{
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int sts;
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if (!getintarg(args, &sts))
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return NULL;
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_exit(sts);
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/* NOTREACHED */
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}
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/* XXX To do: exece, execp */
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static object *
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posix_exec(self, args)
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object *self;
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object *args;
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{
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object *path, *argv;
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char **argvlist;
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int i, argc;
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object *(*getitem) PROTO((object *, int));
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/* exec has two arguments: (path, argv), where
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argv is a list or tuple of strings. */
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if (args == NULL || !is_tupleobject(args) || gettuplesize(args) != 2) {
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badarg:
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err_badarg();
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return NULL;
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}
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if (!getstrarg(gettupleitem(args, 0), &path))
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return NULL;
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argv = gettupleitem(args, 1);
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if (argv == NULL)
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goto badarg;
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if (is_listobject(argv)) {
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argc = getlistsize(argv);
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getitem = getlistitem;
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}
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else if (is_tupleobject(argv)) {
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argc = gettuplesize(argv);
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getitem = gettupleitem;
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}
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else
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goto badarg;
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argvlist = NEW(char *, argc+1);
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if (argvlist == NULL)
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return NULL;
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for (i = 0; i < argc; i++) {
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object *arg;
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if (!getstrarg((*getitem)(argv, i), &arg)) {
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DEL(argvlist);
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goto badarg;
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}
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argvlist[i] = getstringvalue(arg);
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}
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argvlist[argc] = NULL;
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execv(getstringvalue(path), argvlist);
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/* If we get here it's definitely an error */
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DEL(argvlist);
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return posix_error();
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}
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static object *
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posix_fork(self, args)
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object *self;
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object *args;
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{
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int pid;
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pid = fork();
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if (pid == -1)
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return posix_error();
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return newintobject((long)pid);
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}
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static object *
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posix_getpid(self, args)
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object *self;
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object *args;
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{
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if (!getnoarg(args))
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return NULL;
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return newintobject((long)getpid());
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}
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static object *
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posix_getpgrp(self, args)
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object *self;
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object *args;
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{
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if (!getnoarg(args))
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return NULL;
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return newintobject((long)getpgrp());
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}
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static object *
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posix_getppid(self, args)
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object *self;
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object *args;
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{
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if (!getnoarg(args))
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return NULL;
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return newintobject((long)getppid());
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}
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static object *
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posix_kill(self, args)
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object *self;
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object *args;
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{
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int pid, sig;
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if (!getintintarg(args, &pid, &sig))
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return NULL;
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if (kill(pid, sig) == -1)
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return posix_error();
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INCREF(None);
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return None;
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}
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static object *
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posix_popen(self, args)
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object *self;
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object *args;
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{
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extern int pclose PROTO((FILE *));
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object *name, *mode;
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FILE *fp;
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if (args == NULL || !is_tupleobject(args) || gettuplesize(args) != 2 ||
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!is_stringobject(name = gettupleitem(args, 0)) ||
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!is_stringobject(mode = gettupleitem(args, 1))) {
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err_setstr(TypeError, "open() requires 2 string arguments");
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return NULL;
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}
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fp = popen(getstringvalue(name), getstringvalue(mode));
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if (fp == NULL)
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return posix_error();
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return newopenfileobject(fp, name, mode, pclose);
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}
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static object *
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posix_wait(self, args) /* Also waitpid() */
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object *self;
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object *args;
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{
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object *v;
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int pid, sts;
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if (args == NULL)
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pid = wait(&sts);
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else {
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#ifdef NO_WAITPID
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err_setstr(RuntimeError,
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"posix.wait(pid, options) not supported on this system");
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#else
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int options;
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if (!getintintarg(args, &pid, &options))
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return NULL;
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pid = waitpid(pid, &sts, options);
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#endif
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}
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if (pid == -1)
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return posix_error();
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|
v = newtupleobject(2);
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|
if (v != NULL) {
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settupleitem(v, 0, newintobject((long)pid));
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|
settupleitem(v, 1, newintobject((long)sts));
|
|
if (err_occurred()) {
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|
DECREF(v);
|
|
v = NULL;
|
|
}
|
|
}
|
|
return v;
|
|
}
|
|
|
|
#endif /* MSDOS */
|
|
|
|
#ifndef NO_LSTAT
|
|
|
|
static object *
|
|
posix_lstat(self, args)
|
|
object *self;
|
|
object *args;
|
|
{
|
|
extern int lstat PROTO((const char *, struct stat *));
|
|
return posix_do_stat(self, args, lstat);
|
|
}
|
|
|
|
static object *
|
|
posix_readlink(self, args)
|
|
object *self;
|
|
object *args;
|
|
{
|
|
char buf[1024]; /* XXX Should use MAXPATHLEN */
|
|
object *path;
|
|
int n;
|
|
if (!getstrarg(args, &path))
|
|
return NULL;
|
|
n = readlink(getstringvalue(path), buf, sizeof buf);
|
|
if (n < 0)
|
|
return posix_error();
|
|
return newsizedstringobject(buf, n);
|
|
}
|
|
|
|
static object *
|
|
posix_symlink(self, args)
|
|
object *self;
|
|
object *args;
|
|
{
|
|
extern int symlink PROTO((const char *, const char *));
|
|
return posix_2str(args, symlink);
|
|
}
|
|
|
|
#endif /* NO_LSTAT */
|
|
|
|
|
|
static struct methodlist posix_methods[] = {
|
|
{"chdir", posix_chdir},
|
|
{"chmod", posix_chmod},
|
|
{"getcwd", posix_getcwd},
|
|
#ifndef MSDOS
|
|
{"link", posix_link},
|
|
#endif
|
|
{"listdir", posix_listdir},
|
|
{"mkdir", posix_mkdir},
|
|
{"rename", posix_rename},
|
|
{"rmdir", posix_rmdir},
|
|
{"stat", posix_stat},
|
|
{"system", posix_system},
|
|
#ifndef MSDOS
|
|
{"umask", posix_umask},
|
|
#endif
|
|
{"unlink", posix_unlink},
|
|
{"utime", posix_utime},
|
|
#ifndef MSDOS
|
|
{"_exit", posix__exit},
|
|
{"exec", posix_exec},
|
|
{"fork", posix_fork},
|
|
{"getpid", posix_getpid},
|
|
{"getpgrp", posix_getpgrp},
|
|
{"getppid", posix_getppid},
|
|
{"kill", posix_kill},
|
|
{"popen", posix_popen},
|
|
{"wait", posix_wait},
|
|
#endif
|
|
#ifndef NO_LSTAT
|
|
{"lstat", posix_lstat},
|
|
{"readlink", posix_readlink},
|
|
{"symlink", posix_symlink},
|
|
#endif
|
|
{NULL, NULL} /* Sentinel */
|
|
};
|
|
|
|
|
|
void
|
|
initposix()
|
|
{
|
|
object *m, *d, *v;
|
|
|
|
m = initmodule("posix", posix_methods);
|
|
d = getmoduledict(m);
|
|
|
|
/* Initialize posix.environ dictionary */
|
|
v = convertenviron();
|
|
if (v == NULL || dictinsert(d, "environ", v) != 0)
|
|
fatal("can't define posix.environ");
|
|
DECREF(v);
|
|
|
|
/* Initialize posix.error exception */
|
|
PosixError = newstringobject("posix.error");
|
|
if (PosixError == NULL || dictinsert(d, "error", PosixError) != 0)
|
|
fatal("can't define posix.error");
|
|
}
|
|
|
|
|
|
/* Function used elsewhere to get a file's modification time */
|
|
|
|
long
|
|
getmtime(path)
|
|
char *path;
|
|
{
|
|
struct stat st;
|
|
if (stat(path, &st) != 0)
|
|
return -1;
|
|
else
|
|
return st.st_mtime;
|
|
}
|
|
|
|
|
|
#ifdef MSDOS
|
|
|
|
/* A small "compatibility library" for TurboC under MS-DOS */
|
|
|
|
#include <sir.h>
|
|
#include <io.h>
|
|
#include <dos.h>
|
|
#include <fcntl.h>
|
|
|
|
int
|
|
chmod(path, mode)
|
|
char *path;
|
|
int mode;
|
|
{
|
|
return _chmod(path, 1, mode);
|
|
}
|
|
|
|
int
|
|
utime(path, times)
|
|
char *path;
|
|
time_t times[2];
|
|
{
|
|
struct date dt;
|
|
struct time tm;
|
|
struct ftime dft;
|
|
int fh;
|
|
unixtodos(tv[0].tv_sec,&dt,&tm);
|
|
dft.ft_tsec = tm.ti_sec; dft.ft_min = tm.ti_min;
|
|
dft.ft_hour = tm.ti_hour; dft.ft_day = dt.da_day;
|
|
dft.ft_month = dt.da_mon;
|
|
dft.ft_year = (dt.da_year - 1980); /* this is for TC library */
|
|
|
|
if ((fh = open(getstringvalue(path),O_RDWR)) < 0)
|
|
return posix_error(); /* can't open file to set time */
|
|
if (setftime(fh,&dft) < 0)
|
|
{
|
|
close(fh);
|
|
return posix_error();
|
|
}
|
|
close(fh); /* close the temp handle */
|
|
}
|
|
|
|
#endif /* MSDOS */
|