usr.bin/procstat/procstat_files.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2007-2011 Robert N. M. Watson
   5  * Copyright (c) 2015 Allan Jude <allanjude@freebsd.org>
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD$
  30  */
  31
  32 #include <sys/param.h>
  33 #include <sys/capsicum.h>
  34 #include <sys/socket.h>
  35 #include <sys/sysctl.h>
  36 #include <sys/un.h>
  37 #include <sys/user.h>
  38
  39 #include <netinet/in.h>
  40
  41 #include <arpa/inet.h>
  42
  43 #include <err.h>
  44 #include <libprocstat.h>
  45 #include <inttypes.h>
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49
  50 #include "procstat.h"
  51
  52 static const char *
  53 protocol_to_string(int domain, int type, int protocol)
  54 {
  55
  56         switch (domain) {
  57         case AF_INET:
  58         case AF_INET6:
  59                 switch (protocol) {
  60                 case IPPROTO_TCP:
  61                         return ("TCP");
  62                 case IPPROTO_UDP:
  63                         return ("UDP");
  64                 case IPPROTO_ICMP:
  65                         return ("ICM");
  66                 case IPPROTO_RAW:
  67                         return ("RAW");
  68                 case IPPROTO_SCTP:
  69                         return ("SCT");
  70                 case IPPROTO_DIVERT:
  71                         return ("IPD");
  72                 default:
  73                         return ("IP?");
  74                 }
  75
  76         case AF_LOCAL:
  77                 switch (type) {
  78                 case SOCK_STREAM:
  79                         return ("UDS");
  80                 case SOCK_DGRAM:
  81                         return ("UDD");
  82                 default:
  83                         return ("UD?");
  84                 }
  85         default:
  86                 return ("?");
  87         }
  88 }
  89
  90 static void
  91 addr_to_string(struct sockaddr_storage *ss, char *buffer, int buflen)
  92 {
  93         char buffer2[INET6_ADDRSTRLEN];
  94         struct sockaddr_in6 *sin6;
  95         struct sockaddr_in *sin;
  96         struct sockaddr_un *sun;
  97
  98         switch (ss->ss_family) {
  99         case AF_LOCAL:
 100                 sun = (struct sockaddr_un *)ss;
 101                 if (strlen(sun->sun_path) == 0)
 102                         strlcpy(buffer, "-", buflen);
 103                 else
 104                         strlcpy(buffer, sun->sun_path, buflen);
 105                 break;
 106
 107         case AF_INET:
 108                 sin = (struct sockaddr_in *)ss;
 109                 snprintf(buffer, buflen, "%s:%d", inet_ntoa(sin->sin_addr),
 110                     ntohs(sin->sin_port));
 111                 break;
 112
 113         case AF_INET6:
 114                 sin6 = (struct sockaddr_in6 *)ss;
 115                 if (inet_ntop(AF_INET6, &sin6->sin6_addr, buffer2,
 116                     sizeof(buffer2)) != NULL)
 117                         snprintf(buffer, buflen, "%s.%d", buffer2,
 118                             ntohs(sin6->sin6_port));
 119                 else
 120                         strlcpy(buffer, "-", buflen);
 121                 break;
 122
 123         default:
 124                 strlcpy(buffer, "", buflen);
 125                 break;
 126         }
 127 }
 128
 129 static struct cap_desc {
 130         uint64_t         cd_right;
 131         const char      *cd_desc;
 132 } cap_desc[] = {
 133         /* General file I/O. */
 134         { CAP_READ,             "rd" },
 135         { CAP_WRITE,            "wr" },
 136         { CAP_SEEK,             "se" },
 137         { CAP_MMAP,             "mm" },
 138         { CAP_CREATE,           "cr" },
 139         { CAP_FEXECVE,          "fe" },
 140         { CAP_FSYNC,            "fy" },
 141         { CAP_FTRUNCATE,        "ft" },
 142
 143         /* VFS methods. */
 144         { CAP_FCHDIR,           "cd" },
 145         { CAP_FCHFLAGS,         "cf" },
 146         { CAP_FCHMOD,           "cm" },
 147         { CAP_FCHOWN,           "cn" },
 148         { CAP_FCNTL,            "fc" },
 149         { CAP_FLOCK,            "fl" },
 150         { CAP_FPATHCONF,        "fp" },
 151         { CAP_FSCK,             "fk" },
 152         { CAP_FSTAT,            "fs" },
 153         { CAP_FSTATFS,          "sf" },
 154         { CAP_FUTIMES,          "fu" },
 155         { CAP_LINKAT_SOURCE,    "ls" },
 156         { CAP_LINKAT_TARGET,    "lt" },
 157         { CAP_MKDIRAT,          "md" },
 158         { CAP_MKFIFOAT,         "mf" },
 159         { CAP_MKNODAT,          "mn" },
 160         { CAP_RENAMEAT_SOURCE,  "rs" },
 161         { CAP_RENAMEAT_TARGET,  "rt" },
 162         { CAP_SYMLINKAT,        "sl" },
 163         { CAP_UNLINKAT,         "un" },
 164
 165         /* Lookups - used to constrain *at() calls. */
 166         { CAP_LOOKUP,           "lo" },
 167
 168         /* Extended attributes. */
 169         { CAP_EXTATTR_GET,      "eg" },
 170         { CAP_EXTATTR_SET,      "es" },
 171         { CAP_EXTATTR_DELETE,   "ed" },
 172         { CAP_EXTATTR_LIST,     "el" },
 173
 174         /* Access Control Lists. */
 175         { CAP_ACL_GET,          "ag" },
 176         { CAP_ACL_SET,          "as" },
 177         { CAP_ACL_DELETE,       "ad" },
 178         { CAP_ACL_CHECK,        "ac" },
 179
 180         /* Socket operations. */
 181         { CAP_ACCEPT,           "at" },
 182         { CAP_BIND,             "bd" },
 183         { CAP_CONNECT,          "co" },
 184         { CAP_GETPEERNAME,      "pn" },
 185         { CAP_GETSOCKNAME,      "sn" },
 186         { CAP_GETSOCKOPT,       "gs" },
 187         { CAP_LISTEN,           "ln" },
 188         { CAP_PEELOFF,          "pf" },
 189         { CAP_SETSOCKOPT,       "ss" },
 190         { CAP_SHUTDOWN,         "sh" },
 191
 192         /* Mandatory Access Control. */
 193         { CAP_MAC_GET,          "mg" },
 194         { CAP_MAC_SET,          "ms" },
 195
 196         /* Methods on semaphores. */
 197         { CAP_SEM_GETVALUE,     "sg" },
 198         { CAP_SEM_POST,         "sp" },
 199         { CAP_SEM_WAIT,         "sw" },
 200
 201         /* Event monitoring and posting. */
 202         { CAP_EVENT,            "ev" },
 203         { CAP_KQUEUE_EVENT,     "ke" },
 204         { CAP_KQUEUE_CHANGE,    "kc" },
 205
 206         /* Strange and powerful rights that should not be given lightly. */
 207         { CAP_IOCTL,            "io" },
 208         { CAP_TTYHOOK,          "ty" },
 209
 210         /* Process management via process descriptors. */
 211         { CAP_PDGETPID,         "pg" },
 212         { CAP_PDWAIT,           "pw" },
 213         { CAP_PDKILL,           "pk" },
 214
 215         /*
 216          * Rights that allow to use bindat(2) and connectat(2) syscalls on a
 217          * directory descriptor.
 218          */
 219         { CAP_BINDAT,           "ba" },
 220         { CAP_CONNECTAT,        "ca" },
 221
 222         /* Aliases and defines that combine multiple rights. */
 223         { CAP_PREAD,            "prd" },
 224         { CAP_PWRITE,           "pwr" },
 225
 226         { CAP_MMAP_R,           "mmr" },
 227         { CAP_MMAP_W,           "mmw" },
 228         { CAP_MMAP_X,           "mmx" },
 229         { CAP_MMAP_RW,          "mrw" },
 230         { CAP_MMAP_RX,          "mrx" },
 231         { CAP_MMAP_WX,          "mwx" },
 232         { CAP_MMAP_RWX,         "mma" },
 233
 234         { CAP_RECV,             "re" },
 235         { CAP_SEND,             "sd" },
 236
 237         { CAP_SOCK_CLIENT,      "scl" },
 238         { CAP_SOCK_SERVER,      "ssr" },
 239 };
 240 static const u_int      cap_desc_count = nitems(cap_desc);
 241
 242 static u_int
 243 width_capability(cap_rights_t *rightsp)
 244 {
 245         u_int count, i, width;
 246
 247         count = 0;
 248         width = 0;
 249         for (i = 0; i < cap_desc_count; i++) {
 250                 if (cap_rights_is_set(rightsp, cap_desc[i].cd_right)) {
 251                         width += strlen(cap_desc[i].cd_desc);
 252                         if (count)
 253                                 width++;
 254                         count++;
 255                 }
 256         }
 257         return (width);
 258 }
 259
 260 static void
 261 print_capability(cap_rights_t *rightsp, u_int capwidth)
 262 {
 263         u_int count, i, width;
 264
 265         count = 0;
 266         width = 0;
 267         for (i = width_capability(rightsp); i < capwidth; i++) {
 268                 if (i != 0)
 269                         xo_emit(" ");
 270                 else
 271                         xo_emit("-");
 272         }
 273         xo_open_list("capabilities");
 274         for (i = 0; i < cap_desc_count; i++) {
 275                 if (cap_rights_is_set(rightsp, cap_desc[i].cd_right)) {
 276                         xo_emit("{D:/%s}{l:capabilities/%s}", count ? "," : "",
 277                             cap_desc[i].cd_desc);
 278                         width += strlen(cap_desc[i].cd_desc);
 279                         if (count)
 280                                 width++;
 281                         count++;
 282                 }
 283         }
 284         xo_close_list("capabilities");
 285 }
 286
 287 void
 288 procstat_files(struct procstat *procstat, struct kinfo_proc *kipp)
 289 {
 290         struct sockstat sock;
 291         struct filestat_list *head;
 292         struct filestat *fst;
 293         const char *str;
 294         struct vnstat vn;
 295         u_int capwidth, width;
 296         int error;
 297         char src_addr[PATH_MAX];
 298         char dst_addr[PATH_MAX];
 299
 300         /*
 301          * To print the header in capability mode, we need to know the width
 302          * of the widest capability string.  Even if we get no processes
 303          * back, we will print the header, so we defer aborting due to a lack
 304          * of processes until after the header logic.
 305          */
 306         capwidth = 0;
 307         head = procstat_getfiles(procstat, kipp, 0);
 308         if (head != NULL &&
 309             (procstat_opts & PS_OPT_CAPABILITIES) != 0) {
 310                 STAILQ_FOREACH(fst, head, next) {
 311                         width = width_capability(&fst->fs_cap_rights);
 312                         if (width > capwidth)
 313                                 capwidth = width;
 314                 }
 315                 if (capwidth < strlen("CAPABILITIES"))
 316                         capwidth = strlen("CAPABILITIES");
 317         }
 318
 319         if ((procstat_opts & PS_OPT_NOHEADER) == 0) {
 320                 if ((procstat_opts & PS_OPT_CAPABILITIES) != 0)
 321                         xo_emit("{T:/%5s %-16s %5s %1s %-8s %-*s "
 322                             "%-3s %-12s}\n", "PID", "COMM", "FD", "T",
 323                             "FLAGS", capwidth, "CAPABILITIES", "PRO",
 324                             "NAME");
 325                 else
 326                         xo_emit("{T:/%5s %-16s %5s %1s %1s %-8s "
 327                             "%3s %7s %-3s %-12s}\n", "PID", "COMM", "FD", "T",
 328                             "V", "FLAGS", "REF", "OFFSET", "PRO", "NAME");
 329         }
 330
 331         if (head == NULL)
 332                 return;
 333         xo_emit("{ek:process_id/%5d/%d}", kipp->ki_pid);
 334         xo_emit("{e:command/%-16s/%s}", kipp->ki_comm);
 335         xo_open_list("files");
 336         STAILQ_FOREACH(fst, head, next) {
 337                 xo_open_instance("files");
 338                 xo_emit("{dk:process_id/%5d/%d} ", kipp->ki_pid);
 339                 xo_emit("{d:command/%-16s/%s} ", kipp->ki_comm);
 340                 if (fst->fs_uflags & PS_FST_UFLAG_CTTY)
 341                         xo_emit("{P: }{:fd/%s} ", "ctty");
 342                 else if (fst->fs_uflags & PS_FST_UFLAG_CDIR)
 343                         xo_emit("{P:  }{:fd/%s} ", "cwd");
 344                 else if (fst->fs_uflags & PS_FST_UFLAG_JAIL)
 345                         xo_emit("{P: }{:fd/%s} ", "jail");
 346                 else if (fst->fs_uflags & PS_FST_UFLAG_RDIR)
 347                         xo_emit("{P: }{:fd/%s} ", "root");
 348                 else if (fst->fs_uflags & PS_FST_UFLAG_TEXT)
 349                         xo_emit("{P: }{:fd/%s} ", "text");
 350                 else if (fst->fs_uflags & PS_FST_UFLAG_TRACE)
 351                         xo_emit("{:fd/%s} ", "trace");
 352                 else
 353                         xo_emit("{:fd/%5d} ", fst->fs_fd);
 354
 355                 switch (fst->fs_type) {
 356                 case PS_FST_TYPE_VNODE:
 357                         str = "v";
 358                         xo_emit("{eq:fd_type/vnode}");
 359                         break;
 360
 361                 case PS_FST_TYPE_SOCKET:
 362                         str = "s";
 363                         xo_emit("{eq:fd_type/socket}");
 364                         break;
 365
 366                 case PS_FST_TYPE_PIPE:
 367                         str = "p";
 368                         xo_emit("{eq:fd_type/pipe}");
 369                         break;
 370
 371                 case PS_FST_TYPE_FIFO:
 372                         str = "f";
 373                         xo_emit("{eq:fd_type/fifo}");
 374                         break;
 375
 376                 case PS_FST_TYPE_KQUEUE:
 377                         str = "k";
 378                         xo_emit("{eq:fd_type/kqueue}");
 379                         break;
 380
 381                 case PS_FST_TYPE_CRYPTO:
 382                         str = "c";
 383                         xo_emit("{eq:fd_type/crypto}");
 384                         break;
 385
 386                 case PS_FST_TYPE_MQUEUE:
 387                         str = "m";
 388                         xo_emit("{eq:fd_type/mqueue}");
 389                         break;
 390
 391                 case PS_FST_TYPE_SHM:
 392                         str = "h";
 393                         xo_emit("{eq:fd_type/shm}");
 394                         break;
 395
 396                 case PS_FST_TYPE_PTS:
 397                         str = "t";
 398                         xo_emit("{eq:fd_type/pts}");
 399                         break;
 400
 401                 case PS_FST_TYPE_SEM:
 402                         str = "e";
 403                         xo_emit("{eq:fd_type/sem}");
 404                         break;
 405
 406                 case PS_FST_TYPE_PROCDESC:
 407                         str = "P";
 408                         xo_emit("{eq:fd_type/procdesc}");
 409                         break;
 410
 411                 case PS_FST_TYPE_DEV:
 412                         str = "D";
 413                         xo_emit("{eq:fd_type/dev}");
 414                         break;
 415
 416                 case PS_FST_TYPE_NONE:
 417                         str = "?";
 418                         xo_emit("{eq:fd_type/none}");
 419                         break;
 420
 421                 case PS_FST_TYPE_UNKNOWN:
 422                 default:
 423                         str = "?";
 424                         xo_emit("{eq:fd_type/unknown}");
 425                         break;
 426                 }
 427                 xo_emit("{d:fd_type/%1s/%s} ", str);
 428                 if ((procstat_opts & PS_OPT_CAPABILITIES) == 0) {
 429                         str = "-";
 430                         if (fst->fs_type == PS_FST_TYPE_VNODE) {
 431                                 error = procstat_get_vnode_info(procstat, fst,
 432                                     &vn, NULL);
 433                                 switch (vn.vn_type) {
 434                                 case PS_FST_VTYPE_VREG:
 435                                         str = "r";
 436                                         xo_emit("{eq:vode_type/regular}");
 437                                         break;
 438
 439                                 case PS_FST_VTYPE_VDIR:
 440                                         str = "d";
 441                                         xo_emit("{eq:vode_type/directory}");
 442                                         break;
 443
 444                                 case PS_FST_VTYPE_VBLK:
 445                                         str = "b";
 446                                         xo_emit("{eq:vode_type/block}");
 447                                         break;
 448
 449                                 case PS_FST_VTYPE_VCHR:
 450                                         str = "c";
 451                                         xo_emit("{eq:vode_type/character}");
 452                                         break;
 453
 454                                 case PS_FST_VTYPE_VLNK:
 455                                         str = "l";
 456                                         xo_emit("{eq:vode_type/link}");
 457                                         break;
 458
 459                                 case PS_FST_VTYPE_VSOCK:
 460                                         str = "s";
 461                                         xo_emit("{eq:vode_type/socket}");
 462                                         break;
 463
 464                                 case PS_FST_VTYPE_VFIFO:
 465                                         str = "f";
 466                                         xo_emit("{eq:vode_type/fifo}");
 467                                         break;
 468
 469                                 case PS_FST_VTYPE_VBAD:
 470                                         str = "x";
 471                                         xo_emit("{eq:vode_type/revoked_device}");
 472                                         break;
 473
 474                                 case PS_FST_VTYPE_VNON:
 475                                         str = "?";
 476                                         xo_emit("{eq:vode_type/non}");
 477                                         break;
 478
 479                                 case PS_FST_VTYPE_UNKNOWN:
 480                                 default:
 481                                         str = "?";
 482                                         xo_emit("{eq:vode_type/unknown}");
 483                                         break;
 484                                 }
 485                         }
 486                         xo_emit("{d:vnode_type/%1s/%s} ", str);
 487                 }
 488
 489                 xo_emit("{d:/%s}", fst->fs_fflags & PS_FST_FFLAG_READ ?
 490                     "r" : "-");
 491                 xo_emit("{d:/%s}", fst->fs_fflags & PS_FST_FFLAG_WRITE ?
 492                     "w" : "-");
 493                 xo_emit("{d:/%s}", fst->fs_fflags & PS_FST_FFLAG_APPEND ?
 494                     "a" : "-");
 495                 xo_emit("{d:/%s}", fst->fs_fflags & PS_FST_FFLAG_ASYNC ?
 496                     "s" : "-");
 497                 xo_emit("{d:/%s}", fst->fs_fflags & PS_FST_FFLAG_SYNC ?
 498                     "f" : "-");
 499                 xo_emit("{d:/%s}", fst->fs_fflags & PS_FST_FFLAG_NONBLOCK ?
 500                     "n" : "-");
 501                 xo_emit("{d:/%s}", fst->fs_fflags & PS_FST_FFLAG_DIRECT ?
 502                     "d" : "-");
 503                 xo_emit("{d:/%s}", fst->fs_fflags & PS_FST_FFLAG_HASLOCK ?
 504                     "l" : "-");
 505                 xo_emit(" ");
 506                 xo_open_list("fd_flags");
 507                 if (fst->fs_fflags & PS_FST_FFLAG_READ)
 508                         xo_emit("{elq:fd_flags/read}");
 509                 if (fst->fs_fflags & PS_FST_FFLAG_WRITE)
 510                         xo_emit("{elq:fd_flags/write}");
 511                 if (fst->fs_fflags & PS_FST_FFLAG_APPEND)
 512                         xo_emit("{elq:fd_flags/append}");
 513                 if (fst->fs_fflags & PS_FST_FFLAG_ASYNC)
 514                         xo_emit("{elq:fd_flags/async}");
 515                 if (fst->fs_fflags & PS_FST_FFLAG_SYNC)
 516                         xo_emit("{elq:fd_flags/fsync}");
 517                 if (fst->fs_fflags & PS_FST_FFLAG_NONBLOCK)
 518                         xo_emit("{elq:fd_flags/nonblocking}");
 519                 if (fst->fs_fflags & PS_FST_FFLAG_DIRECT)
 520                         xo_emit("{elq:fd_flags/direct_io}");
 521                 if (fst->fs_fflags & PS_FST_FFLAG_HASLOCK)
 522                         xo_emit("{elq:fd_flags/lock_held}");
 523                 xo_close_list("fd_flags");
 524
 525                 if ((procstat_opts & PS_OPT_CAPABILITIES) == 0) {
 526                         if (fst->fs_ref_count > -1)
 527                                 xo_emit("{:ref_count/%3d/%d} ",
 528                                     fst->fs_ref_count);
 529                         else
 530                                 xo_emit("{q:ref_count/%3c/%c} ", '-');
 531                         if (fst->fs_offset > -1)
 532                                 xo_emit("{:offset/%7jd/%jd} ",
 533                                     (intmax_t)fst->fs_offset);
 534                         else
 535                                 xo_emit("{q:offset/%7c/%c} ", '-');
 536                 }
 537                 if ((procstat_opts & PS_OPT_CAPABILITIES) != 0) {
 538                         print_capability(&fst->fs_cap_rights, capwidth);
 539                         xo_emit(" ");
 540                 }
 541                 switch (fst->fs_type) {
 542                 case PS_FST_TYPE_SOCKET:
 543                         error = procstat_get_socket_info(procstat, fst, &sock,
 544                             NULL);
 545                         if (error != 0)
 546                                 break;
 547                         xo_emit("{:protocol/%-3s/%s} ",
 548                             protocol_to_string(sock.dom_family,
 549                             sock.type, sock.proto));
 550                         if (sock.proto == IPPROTO_TCP ||
 551                             sock.proto == IPPROTO_SCTP ||
 552                             sock.type == SOCK_STREAM) {
 553                                 xo_emit("{:sendq/%u} ", sock.sendq);
 554                                 xo_emit("{:recvq/%u} ", sock.recvq);
 555                         }
 556                         /*
 557                          * While generally we like to print two addresses,
 558                          * local and peer, for sockets, it turns out to be
 559                          * more useful to print the first non-nul address for
 560                          * local sockets, as typically they aren't bound and
 561                          *  connected, and the path strings can get long.
 562                          */
 563                         if (sock.dom_family == AF_LOCAL) {
 564                                 struct sockaddr_un *sun =
 565                                     (struct sockaddr_un *)&sock.sa_local;
 566
 567                                 if (sun->sun_path[0] != 0)
 568                                         addr_to_string(&sock.sa_local,
 569                                             src_addr, sizeof(src_addr));
 570                                 else
 571                                         addr_to_string(&sock.sa_peer,
 572                                             src_addr, sizeof(src_addr));
 573                                 xo_emit("{:path/%s}", src_addr);
 574                         } else {
 575                                 addr_to_string(&sock.sa_local, src_addr,
 576                                     sizeof(src_addr));
 577                                 addr_to_string(&sock.sa_peer, dst_addr,
 578                                     sizeof(dst_addr));
 579                                 xo_emit("{:path/%s %s}", src_addr, dst_addr);
 580                         }
 581                         break;
 582
 583                 default:
 584                         xo_emit("{:protocol/%-3s/%s} ", "-");
 585                         xo_emit("{:path/%-18s/%s}", fst->fs_path != NULL ?
 586                             fst->fs_path : "-");
 587                 }
 588
 589                 xo_emit("\n");
 590                 xo_close_instance("files");
 591         }
 592         xo_close_list("files");
 593         procstat_freefiles(procstat, head);
 594 }