/* $OpenBSD: fstat.c,v 1.21 1998/11/30 10:19:02 deraadt Exp $ */ /*- * Copyright (c) 1988, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1988, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint /*static char sccsid[] = "from: @(#)fstat.c 8.1 (Berkeley) 6/6/93";*/ static char *rcsid = "$OpenBSD: fstat.c,v 1.21 1998/11/30 10:19:02 deraadt Exp $"; #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #define _KERNEL #include #include #include #undef _KERNEL #define NFS #include #include #include #include #include #undef NFS #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "fstat.h" #define TEXT -1 #define CDIR -2 #define RDIR -3 #define TRACE -4 typedef struct devs { struct devs *next; long fsid; ino_t ino; char *name; } DEVS; DEVS *devs; int fsflg, /* show files on same filesystem as file(s) argument */ pflg, /* show files open by a particular pid */ uflg; /* show files open by a particular (effective) user */ int checkfile; /* true if restricting to particular files or filesystems */ int nflg; /* (numerical) display f.s. and rdev as dev_t */ int vflg; /* display errors in locating kernel data objects etc... */ struct file **ofiles; /* buffer of pointers to file structures */ int maxfiles; #define ALLOC_OFILES(d) \ if ((d) > maxfiles) { \ free(ofiles); \ ofiles = malloc((d) * sizeof(struct file *)); \ if (ofiles == NULL) \ err(1, "malloc"); \ maxfiles = (d); \ } /* * a kvm_read that returns true if everything is read */ #define KVM_READ(kaddr, paddr, len) \ (kvm_read(kd, (u_long)(kaddr), (void *)(paddr), (len)) == (len)) kvm_t *kd; int ufs_filestat __P((struct vnode *, struct filestat *)); int ext2fs_filestat __P((struct vnode *, struct filestat *)); int isofs_filestat __P((struct vnode *, struct filestat *)); int msdos_filestat __P((struct vnode *, struct filestat *)); int nfs_filestat __P((struct vnode *, struct filestat *)); void dofiles __P((struct kinfo_proc *)); void getinetproto __P((int)); void socktrans __P((struct socket *, int)); void usage __P((void)); void vtrans __P((struct vnode *, int, int)); int getfname __P((char *)); int main(argc, argv) int argc; char **argv; { extern char *optarg; extern int optind; register struct passwd *passwd; struct kinfo_proc *p, *plast; int arg, ch, what; char *memf, *nlistf; char buf[_POSIX2_LINE_MAX]; int cnt; arg = 0; what = KERN_PROC_ALL; nlistf = memf = NULL; while ((ch = getopt(argc, argv, "fnp:u:vN:M:")) != -1) switch((char)ch) { case 'f': fsflg = 1; break; case 'M': memf = optarg; break; case 'N': nlistf = optarg; break; case 'n': nflg = 1; break; case 'p': if (pflg++) usage(); if (!isdigit(*optarg)) { warnx( "-p requires a process id\n"); usage(); } what = KERN_PROC_PID; arg = atoi(optarg); break; case 'u': if (uflg++) usage(); if (!(passwd = getpwnam(optarg))) errx(1, "%s: unknown uid", optarg); what = KERN_PROC_UID; arg = passwd->pw_uid; break; case 'v': vflg = 1; break; case '?': default: usage(); } if (*(argv += optind)) { for (; *argv; ++argv) { if (getfname(*argv)) checkfile = 1; } if (!checkfile) /* file(s) specified, but none accessable */ exit(1); } ALLOC_OFILES(256); /* reserve space for file pointers */ if (fsflg && !checkfile) { /* -f with no files means use wd */ if (getfname(".") == 0) exit(1); checkfile = 1; } /* * Discard setgid privileges if not the running kernel so that bad * guys can't print interesting stuff from kernel memory. */ if (nlistf != NULL || memf != NULL) { setegid(getgid()); setgid(getgid()); } if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf)) == NULL) errx(1, "%s", buf); setegid(getgid()); setgid(getgid()); if ((p = kvm_getprocs(kd, what, arg, &cnt)) == NULL) errx(1, "%s", kvm_geterr(kd)); if (nflg) printf("%s", "USER CMD PID FD DEV INUM MODE SZ|DV R/W"); else printf("%s", "USER CMD PID FD MOUNT INUM MODE SZ|DV R/W"); if (checkfile && fsflg == 0) printf(" NAME\n"); else putchar('\n'); for (plast = &p[cnt]; p < plast; ++p) { if (p->kp_proc.p_stat == SZOMB) continue; dofiles(p); } exit(0); } char *Uname, *Comm; pid_t Pid; #define PREFIX(i) printf("%-8.8s %-10s %5d", Uname, Comm, Pid); \ switch(i) { \ case TEXT: \ printf(" text"); \ break; \ case CDIR: \ printf(" wd"); \ break; \ case RDIR: \ printf(" root"); \ break; \ case TRACE: \ printf(" tr"); \ break; \ default: \ printf(" %4d", i); \ break; \ } /* * print open files attributed to this process */ void dofiles(kp) struct kinfo_proc *kp; { int i; struct file file; struct filedesc0 filed0; #define filed filed0.fd_fd struct proc *p = &kp->kp_proc; struct eproc *ep = &kp->kp_eproc; extern char *user_from_uid(); Uname = user_from_uid(ep->e_ucred.cr_uid, 0); Pid = p->p_pid; Comm = p->p_comm; if (p->p_fd == NULL) return; if (!KVM_READ(p->p_fd, &filed0, sizeof (filed0))) { dprintf("can't read filedesc at %p for pid %d", p->p_fd, Pid); return; } if (filed.fd_nfiles < 0 || filed.fd_lastfile >= filed.fd_nfiles || filed.fd_freefile > filed.fd_lastfile + 1) { dprintf("filedesc corrupted at %p for pid %d", p->p_fd, Pid); return; } /* * root directory vnode, if one */ if (filed.fd_rdir) vtrans(filed.fd_rdir, RDIR, FREAD); /* * current working directory vnode */ vtrans(filed.fd_cdir, CDIR, FREAD); /* * ktrace vnode, if one */ if (p->p_tracep) vtrans(p->p_tracep, TRACE, FREAD|FWRITE); /* * open files */ #define FPSIZE (sizeof (struct file *)) ALLOC_OFILES(filed.fd_lastfile+1); if (filed.fd_nfiles > NDFILE) { if (!KVM_READ(filed.fd_ofiles, ofiles, (filed.fd_lastfile+1) * FPSIZE)) { dprintf("can't read file structures at %p for pid %d", filed.fd_ofiles, Pid); return; } } else bcopy(filed0.fd_dfiles, ofiles, (filed.fd_lastfile+1) * FPSIZE); for (i = 0; i <= filed.fd_lastfile; i++) { if (ofiles[i] == NULL) continue; if (!KVM_READ(ofiles[i], &file, sizeof (struct file))) { dprintf("can't read file %d at %p for pid %d", i, ofiles[i], Pid); continue; } if (file.f_type == DTYPE_VNODE) vtrans((struct vnode *)file.f_data, i, file.f_flag); else if (file.f_type == DTYPE_SOCKET) { if (checkfile == 0) socktrans((struct socket *)file.f_data, i); } else { dprintf("unknown file type %d for file %d of pid %d", file.f_type, i, Pid); } } } void vtrans(vp, i, flag) struct vnode *vp; int i; int flag; { struct vnode vn; struct filestat fst; char rw[3], mode[17]; char *badtype = NULL, *filename, *getmnton(); filename = badtype = NULL; if (!KVM_READ(vp, &vn, sizeof (struct vnode))) { dprintf("can't read vnode at %p for pid %d", vp, Pid); return; } if (vn.v_type == VNON || vn.v_tag == VT_NON) badtype = "none"; else if (vn.v_type == VBAD) badtype = "bad"; else switch (vn.v_tag) { case VT_UFS: case VT_MFS: if (!ufs_filestat(&vn, &fst)) badtype = "error"; break; case VT_NFS: if (!nfs_filestat(&vn, &fst)) badtype = "error"; break; case VT_EXT2FS: if (!ext2fs_filestat(&vn, &fst)) badtype = "error"; break; case VT_ISOFS: if (!isofs_filestat(&vn, &fst)) badtype = "error"; break; case VT_MSDOSFS: if (!msdos_filestat(&vn, &fst)) badtype = "error"; break; case VT_XFS: if (!xfs_filestat(&vn, &fst)) badtype = "error"; break; default: { static char unknown[30]; sprintf(badtype = unknown, "?(%x)", vn.v_tag); break; } } if (checkfile) { int fsmatch = 0; register DEVS *d; if (badtype) return; for (d = devs; d != NULL; d = d->next) if (d->fsid == fst.fsid) { fsmatch = 1; if (d->ino == fst.fileid) { filename = d->name; break; } } if (fsmatch == 0 || (filename == NULL && fsflg == 0)) return; } PREFIX(i); if (badtype) { (void)printf(" - - %10s -\n", badtype); return; } if (nflg) (void)printf(" %2d,%-2d", major(fst.fsid), minor(fst.fsid)); else (void)printf(" %-8s", getmnton(vn.v_mount)); if (nflg) (void)sprintf(mode, "%o", fst.mode); else strmode(fst.mode, mode); (void)printf(" %6ld %10s", fst.fileid, mode); switch (vn.v_type) { case VBLK: case VCHR: { char *name; if (nflg || ((name = devname(fst.rdev, vn.v_type == VCHR ? S_IFCHR : S_IFBLK)) == NULL)) printf(" %2d,%-2d", major(fst.rdev), minor(fst.rdev)); else printf(" %6s", name); break; } default: printf(" %6qd", fst.size); } rw[0] = '\0'; if (flag & FREAD) strcat(rw, "r"); if (flag & FWRITE) strcat(rw, "w"); printf(" %2s", rw); if (filename && !fsflg) printf(" %s", filename); putchar('\n'); } int ufs_filestat(vp, fsp) struct vnode *vp; struct filestat *fsp; { struct inode inode; if (!KVM_READ(VTOI(vp), &inode, sizeof (inode))) { dprintf("can't read inode at %p for pid %d", VTOI(vp), Pid); return 0; } fsp->fsid = inode.i_dev & 0xffff; fsp->fileid = (long)inode.i_number; fsp->mode = inode.i_ffs_mode; fsp->size = inode.i_ffs_size; fsp->rdev = inode.i_ffs_rdev; return 1; } int ext2fs_filestat(vp, fsp) struct vnode *vp; struct filestat *fsp; { struct inode inode; if (!KVM_READ(VTOI(vp), &inode, sizeof (inode))) { dprintf("can't read inode at %p for pid %d", VTOI(vp), Pid); return 0; } fsp->fsid = inode.i_dev & 0xffff; fsp->fileid = (long)inode.i_number; fsp->mode = inode.i_e2fs_mode; fsp->size = inode.i_e2fs_size; fsp->rdev = 0; /* XXX */ return 1; } int msdos_filestat(vp, fsp) struct vnode *vp; struct filestat *fsp; { #if 0 struct inode inode; if (!KVM_READ(VTOI(vp), &inode, sizeof (inode))) { dprintf("can't read inode at %p for pid %d", VTOI(vp), Pid); return 0; } fsp->fsid = inode.i_dev & 0xffff; fsp->fileid = (long)inode.i_number; fsp->mode = inode.i_e2fs_mode; fsp->size = inode.i_e2fs_size; fsp->rdev = 0; /* XXX */ #endif return 1; } int nfs_filestat(vp, fsp) struct vnode *vp; struct filestat *fsp; { struct nfsnode nfsnode; register mode_t mode; if (!KVM_READ(VTONFS(vp), &nfsnode, sizeof (nfsnode))) { dprintf("can't read nfsnode at %p for pid %d", VTONFS(vp), Pid); return 0; } fsp->fsid = nfsnode.n_vattr.va_fsid; fsp->fileid = nfsnode.n_vattr.va_fileid; fsp->size = nfsnode.n_size; fsp->rdev = nfsnode.n_vattr.va_rdev; mode = (mode_t)nfsnode.n_vattr.va_mode; switch (vp->v_type) { case VREG: mode |= S_IFREG; break; case VDIR: mode |= S_IFDIR; break; case VBLK: mode |= S_IFBLK; break; case VCHR: mode |= S_IFCHR; break; case VLNK: mode |= S_IFLNK; break; case VSOCK: mode |= S_IFSOCK; break; case VFIFO: mode |= S_IFIFO; break; default: break; }; fsp->mode = mode; return 1; } int xfs_filestat(vp, fsp) struct vnode *vp; struct filestat *fsp; { struct xfs_node xfs_node; if (!KVM_READ(VNODE_TO_XNODE(vp), &xfs_node, sizeof (xfs_node))) { dprintf("can't read xfs_node at %p for pid %d", VTOI(vp), Pid); return 0; } fsp->fsid = xfs_node.attr.va_fsid; fsp->fileid = (long)xfs_node.attr.va_fileid; fsp->mode = xfs_node.attr.va_mode; fsp->size = xfs_node.attr.va_size; fsp->rdev = xfs_node.attr.va_rdev; return 1; } char * getmnton(m) struct mount *m; { static struct mount mount; static struct mtab { struct mtab *next; struct mount *m; char mntonname[MNAMELEN]; } *mhead = NULL; register struct mtab *mt; for (mt = mhead; mt != NULL; mt = mt->next) if (m == mt->m) return (mt->mntonname); if (!KVM_READ(m, &mount, sizeof(struct mount))) { warn("can't read mount table at %p", m); return (NULL); } if ((mt = malloc(sizeof (struct mtab))) == NULL) err(1, "malloc"); mt->m = m; bcopy(&mount.mnt_stat.f_mntonname[0], &mt->mntonname[0], MNAMELEN); mt->next = mhead; mhead = mt; return (mt->mntonname); } void socktrans(sock, i) struct socket *sock; int i; { static char *stypename[] = { "unused", /* 0 */ "stream", /* 1 */ "dgram", /* 2 */ "raw", /* 3 */ "rdm", /* 4 */ "seqpak" /* 5 */ }; #define STYPEMAX 5 struct socket so; struct protosw proto; struct domain dom; struct inpcb inpcb; struct unpcb unpcb; int len; char dname[32]; PREFIX(i); /* fill in socket */ if (!KVM_READ(sock, &so, sizeof(struct socket))) { dprintf("can't read sock at %p", sock); goto bad; } /* fill in protosw entry */ if (!KVM_READ(so.so_proto, &proto, sizeof(struct protosw))) { dprintf("can't read protosw at %p", so.so_proto); goto bad; } /* fill in domain */ if (!KVM_READ(proto.pr_domain, &dom, sizeof(struct domain))) { dprintf("can't read domain at %p", proto.pr_domain); goto bad; } if ((len = kvm_read(kd, (u_long)dom.dom_name, dname, sizeof(dname) - 1)) != sizeof(dname) -1) { dprintf("can't read domain name at %p", dom.dom_name); dname[0] = '\0'; } else dname[len] = '\0'; if ((u_short)so.so_type > STYPEMAX) printf("* %s ?%d", dname, so.so_type); else printf("* %s %s", dname, stypename[so.so_type]); /* * protocol specific formatting * * Try to find interesting things to print. For tcp, the interesting * thing is the address of the tcpcb, for udp and others, just the * inpcb (socket pcb). For unix domain, its the address of the socket * pcb and the address of the connected pcb (if connected). Otherwise * just print the protocol number and address of the socket itself. * The idea is not to duplicate netstat, but to make available enough * information for further analysis. */ switch(dom.dom_family) { case AF_INET: getinetproto(proto.pr_protocol); if (proto.pr_protocol == IPPROTO_TCP) { if (so.so_pcb == NULL) break; if (kvm_read(kd, (u_long)so.so_pcb, (char *)&inpcb, sizeof(struct inpcb)) != sizeof(struct inpcb)) { dprintf("can't read inpcb at %p", so.so_pcb); goto bad; } printf(" %p", inpcb.inp_ppcb); printf(" %s:%d", inpcb.inp_laddr.s_addr == INADDR_ANY ? "*" : inet_ntoa(inpcb.inp_laddr), ntohs(inpcb.inp_lport)); if (inpcb.inp_fport) { if (so.so_state & SS_CONNECTOUT) printf(" --> "); else printf(" <-- "); printf("%s:%d", inpcb.inp_faddr.s_addr == INADDR_ANY ? "*" : inet_ntoa(inpcb.inp_faddr), ntohs(inpcb.inp_fport)); } } else if (proto.pr_protocol == IPPROTO_UDP) { if (so.so_pcb == NULL) break; if (kvm_read(kd, (u_long)so.so_pcb, (char *)&inpcb, sizeof(struct inpcb)) != sizeof(struct inpcb)) { dprintf("can't read inpcb at %p", so.so_pcb); goto bad; } printf(" %s:%d", inpcb.inp_laddr.s_addr == INADDR_ANY ? "*" : inet_ntoa(inpcb.inp_laddr), ntohs(inpcb.inp_lport)); if (inpcb.inp_fport) printf(" <-> %s:%d", inpcb.inp_faddr.s_addr == INADDR_ANY ? "*" : inet_ntoa(inpcb.inp_faddr), ntohs(inpcb.inp_fport)); } else if (so.so_pcb) printf(" %p", so.so_pcb); break; case AF_UNIX: /* print address of pcb and connected pcb */ if (so.so_pcb) { printf(" %p", so.so_pcb); if (kvm_read(kd, (u_long)so.so_pcb, (char *)&unpcb, sizeof(struct unpcb)) != sizeof(struct unpcb)){ dprintf("can't read unpcb at %p", so.so_pcb); goto bad; } if (unpcb.unp_conn) { char shoconn[4], *cp; cp = shoconn; if (!(so.so_state & SS_CANTRCVMORE)) *cp++ = '<'; *cp++ = '-'; if (!(so.so_state & SS_CANTSENDMORE)) *cp++ = '>'; *cp = '\0'; printf(" %s %p", shoconn, unpcb.unp_conn); } } break; default: /* print protocol number and socket address */ printf(" %d %p", proto.pr_protocol, sock); } printf("\n"); return; bad: printf("* error\n"); } /* * getinetproto -- * print name of protocol number */ void getinetproto(number) int number; { char *cp; switch(number) { case IPPROTO_IP: cp = "ip"; break; case IPPROTO_ICMP: cp ="icmp"; break; case IPPROTO_GGP: cp ="ggp"; break; case IPPROTO_TCP: cp ="tcp"; break; case IPPROTO_EGP: cp ="egp"; break; case IPPROTO_PUP: cp ="pup"; break; case IPPROTO_UDP: cp ="udp"; break; case IPPROTO_IDP: cp ="idp"; break; case IPPROTO_RAW: cp ="raw"; break; default: printf(" %d", number); return; } printf(" %s", cp); } int getfname(filename) char *filename; { struct stat statbuf; DEVS *cur; if (stat(filename, &statbuf)) { warn(filename); return(0); } if ((cur = malloc(sizeof(DEVS))) == NULL) err(1, "malloc"); cur->next = devs; devs = cur; cur->ino = statbuf.st_ino; cur->fsid = statbuf.st_dev & 0xffff; cur->name = filename; return(1); } void usage() { (void)fprintf(stderr, "usage: fstat [-fnv] [-p pid] [-u user] [-N system] [-M core] [file ...]\n"); exit(1); }