1 /*- 2 * Copyright (c) 1994 Christos Zoulas 3 * Copyright (c) 1995 Frank van der Linden 4 * Copyright (c) 1995 Scott Bartram 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * from: svr4_util.c,v 1.5 1995/01/22 23:44:50 christos Exp 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/lock.h> 37 #include <sys/malloc.h> 38 #include <sys/mutex.h> 39 #include <sys/namei.h> 40 #include <sys/proc.h> 41 #include <sys/syscallsubr.h> 42 #include <sys/systm.h> 43 #include <sys/vnode.h> 44 45 #include <machine/stdarg.h> 46 47 #include <compat/linux/linux_util.h> 48 49 const char linux_emul_path[] = "/compat/linux"; 50 51 /* 52 * Search an alternate path before passing pathname arguments on 53 * to system calls. Useful for keeping a separate 'emulation tree'. 54 * 55 * If cflag is set, we check if an attempt can be made to create 56 * the named file, i.e. we check if the directory it should 57 * be in exists. 58 */ 59 int 60 linux_emul_find(td, sgp, path, pbuf, cflag) 61 struct thread *td; 62 caddr_t *sgp; /* Pointer to stackgap memory */ 63 char *path; 64 char **pbuf; 65 int cflag; 66 { 67 char *newpath; 68 size_t sz; 69 int error; 70 71 error = linux_emul_convpath(td, path, (sgp == NULL) ? UIO_SYSSPACE : 72 UIO_USERSPACE, &newpath, cflag); 73 if (newpath == NULL) 74 return (error); 75 76 if (sgp == NULL) { 77 *pbuf = newpath; 78 return (error); 79 } 80 81 sz = strlen(newpath); 82 *pbuf = stackgap_alloc(sgp, sz + 1); 83 if (*pbuf != NULL) 84 error = copyout(newpath, *pbuf, sz + 1); 85 else 86 error = ENAMETOOLONG; 87 free(newpath, M_TEMP); 88 89 return (error); 90 } 91 92 int 93 linux_emul_convpath(td, path, pathseg, pbuf, cflag) 94 struct thread *td; 95 char *path; 96 enum uio_seg pathseg; 97 char **pbuf; 98 int cflag; 99 { 100 101 return (kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf, 102 cflag)); 103 } 104 105 void 106 linux_msg(const struct thread *td, const char *fmt, ...) 107 { 108 va_list ap; 109 struct proc *p; 110 111 p = td->td_proc; 112 printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm); 113 va_start(ap, fmt); 114 vprintf(fmt, ap); 115 va_end(ap); 116 printf("\n"); 117 } 118