diff options
Diffstat (limited to 'lib/libkvm/kvm_file.c')
| -rw-r--r-- | lib/libkvm/kvm_file.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/lib/libkvm/kvm_file.c b/lib/libkvm/kvm_file.c new file mode 100644 index 00000000000..bd6737430f8 --- /dev/null +++ b/lib/libkvm/kvm_file.c @@ -0,0 +1,192 @@ +/*- + * Copyright (c) 1989, 1992, 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)kvm_file.c 8.1 (Berkeley) 6/4/93"; +#endif /* LIBC_SCCS and not lint */ + +/* + * File list interface for kvm. pstat, fstat and netstat are + * users of this code, so we've factored it out into a separate module. + * Thus, we keep this grunge out of the other kvm applications (i.e., + * most other applications are interested only in open/close/read/nlist). + */ + +#include <sys/param.h> +#include <sys/user.h> +#include <sys/proc.h> +#include <sys/exec.h> +#define _KERNEL +#include <sys/file.h> +#undef _KERNEL +#include <sys/stat.h> +#include <sys/ioctl.h> +#include <sys/tty.h> +#include <nlist.h> +#include <kvm.h> + +#include <vm/vm.h> +#include <vm/vm_param.h> +#include <vm/swap_pager.h> + +#include <sys/sysctl.h> + +#include <limits.h> +#include <ndbm.h> +#include <paths.h> + +#include "kvm_private.h" + +#define KREAD(kd, addr, obj) \ + (kvm_read(kd, addr, obj, sizeof(*obj)) != sizeof(*obj)) + +/* + * Get file structures. + */ +static +kvm_deadfiles(kd, op, arg, filehead_o, nfiles) + kvm_t *kd; + int op, arg, nfiles; + long filehead_o; +{ + int buflen = kd->arglen, needed = buflen, error, n = 0; + struct file *fp, file; + struct filelist filehead; + register char *where = kd->argspc; + char *start = where; + + /* + * first copyout filehead + */ + if (buflen > sizeof (filehead)) { + if (KREAD(kd, filehead_o, &filehead)) { + _kvm_err(kd, kd->program, "can't read filehead"); + return (0); + } + buflen -= sizeof (filehead); + where += sizeof (filehead); + *(struct filelist *)kd->argspc = filehead; + } + /* + * followed by an array of file structures + */ + for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { + if (buflen > sizeof (struct file)) { + if (KREAD(kd, (long)fp, ((struct file *)where))) { + _kvm_err(kd, kd->program, "can't read kfp"); + return (0); + } + buflen -= sizeof (struct file); + fp = (struct file *)where; + where += sizeof (struct file); + n++; + } + } + if (n != nfiles) { + _kvm_err(kd, kd->program, "inconsistant nfiles"); + return (0); + } + return (nfiles); +} + +char * +kvm_getfiles(kd, op, arg, cnt) + kvm_t *kd; + int op, arg; + int *cnt; +{ + size_t size; + int mib[2], st, nfiles; + struct file *fp, *fplim; + struct filelist filehead; + + if (ISALIVE(kd)) { + size = 0; + mib[0] = CTL_KERN; + mib[1] = KERN_FILE; + st = sysctl(mib, 2, NULL, &size, NULL, 0); + if (st == -1) { + _kvm_syserr(kd, kd->program, "kvm_getprocs"); + return (0); + } + if (kd->argspc == 0) + kd->argspc = (char *)_kvm_malloc(kd, size); + else if (kd->arglen < size) + kd->argspc = (char *)_kvm_realloc(kd, kd->argspc, size); + if (kd->argspc == 0) + return (0); + kd->arglen = size; + st = sysctl(mib, 2, kd->argspc, &size, NULL, 0); + if (st == -1 || size < sizeof(filehead)) { + _kvm_syserr(kd, kd->program, "kvm_getfiles"); + return (0); + } + filehead = *(struct filelist *)kd->argspc; + fp = (struct file *)(kd->argspc + sizeof (filehead)); + fplim = (struct file *)(kd->argspc + size); + for (nfiles = 0; filehead.lh_first && (fp < fplim); + nfiles++, fp++) + filehead.lh_first = fp->f_list.le_next; + } else { + struct nlist nl[3], *p; + + nl[0].n_name = "_filehead"; + nl[1].n_name = "_nfiles"; + nl[2].n_name = 0; + + if (kvm_nlist(kd, nl) != 0) { + for (p = nl; p->n_type != 0; ++p) + ; + _kvm_err(kd, kd->program, + "%s: no such symbol", p->n_name); + return (0); + } + if (KREAD(kd, nl[0].n_value, &nfiles)) { + _kvm_err(kd, kd->program, "can't read nfiles"); + return (0); + } + size = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); + if (kd->argspc == 0) + kd->argspc = (char *)_kvm_malloc(kd, size); + else if (kd->arglen < size) + kd->argspc = (char *)_kvm_realloc(kd, kd->argspc, size); + if (kd->argspc == 0) + return (0); + kd->arglen = size; + nfiles = kvm_deadfiles(kd, op, arg, nl[1].n_value, nfiles); + if (nfiles == 0) + return (0); + } + *cnt = nfiles; + return (kd->argspc); +} |