1 /* $NetBSD: pathconf.c,v 1.7 2004/03/25 19:36:27 atatat Exp $ */ 2 3 /* 4 * Copyright (c) 1993 5 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static char copyright[] = 34 "@(#) Copyright (c) 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)pathconf.c 8.1 (Berkeley) 6/6/93"; 41 #else 42 static char rcsid[] = "$NetBSD: pathconf.c,v 1.7 2004/03/25 19:36:27 atatat Exp $"; 43 #endif 44 #endif /* not lint */ 45 46 #include <sys/param.h> 47 #include <sys/sysctl.h> 48 #include <sys/unistd.h> 49 50 #include <errno.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 55 #define PC_NAMES { \ 56 { 0, 0 }, \ 57 { "link_max", CTLTYPE_INT }, \ 58 { "max_canon", CTLTYPE_INT }, \ 59 { "max_input", CTLTYPE_INT }, \ 60 { "name_max", CTLTYPE_INT }, \ 61 { "path_max", CTLTYPE_INT }, \ 62 { "pipe_buf", CTLTYPE_INT }, \ 63 { "chown_restricted", CTLTYPE_INT }, \ 64 { "no_trunc", CTLTYPE_INT }, \ 65 { "vdisable", CTLTYPE_INT }, \ 66 } 67 #define PC_MAXID 10 68 69 struct ctlname pcnames[] = PC_NAMES; 70 char names[BUFSIZ]; 71 72 struct list { 73 struct ctlname *list; 74 int size; 75 }; 76 struct list pclist = { pcnames, PC_MAXID }; 77 78 int Aflag, aflag, nflag, wflag, stdinflag; 79 80 int 81 main(argc, argv) 82 int argc; 83 char *argv[]; 84 { 85 char *path; 86 int ch; 87 88 while ((ch = getopt(argc, argv, "Aan")) != -1) { 89 switch (ch) { 90 91 case 'A': 92 Aflag = 1; 93 break; 94 95 case 'a': 96 aflag = 1; 97 break; 98 99 case 'n': 100 nflag = 1; 101 break; 102 103 default: 104 usage(); 105 } 106 } 107 argc -= optind; 108 argv += optind; 109 110 if (argc == 0) 111 usage(); 112 path = *argv++; 113 if (strcmp(path, "-") == 0) 114 stdinflag = 1; 115 argc--; 116 if (Aflag || aflag) { 117 listall(path, &pclist); 118 exit(0); 119 } 120 if (argc == 0) 121 usage(); 122 while (argc-- > 0) 123 parse(path, *argv, 1); 124 exit(0); 125 } 126 127 /* 128 * List all variables known to the system. 129 */ 130 listall(path, lp) 131 char *path; 132 struct list *lp; 133 { 134 int lvl2; 135 136 if (lp->list == 0) 137 return; 138 for (lvl2 = 0; lvl2 < lp->size; lvl2++) { 139 if (lp->list[lvl2].ctl_name == 0) 140 continue; 141 parse(path, lp->list[lvl2].ctl_name, Aflag); 142 } 143 } 144 145 /* 146 * Parse a name into an index. 147 * Lookup and print out the attribute if it exists. 148 */ 149 parse(pathname, string, flags) 150 char *pathname; 151 char *string; 152 int flags; 153 { 154 int indx, value; 155 char *bufp, buf[BUFSIZ]; 156 157 bufp = buf; 158 snprintf(buf, BUFSIZ, "%s", string); 159 if ((indx = findname(string, "top", &bufp, &pclist)) == -1) 160 return; 161 if (bufp) { 162 fprintf(stderr, "name %s in %s is unknown\n", *bufp, string); 163 return; 164 } 165 if (stdinflag) 166 value = fpathconf(0, indx); 167 else 168 value = pathconf(pathname, indx); 169 if (value == -1) { 170 if (flags == 0) 171 return; 172 switch (errno) { 173 case EOPNOTSUPP: 174 fprintf(stderr, "%s: value is not available\n", string); 175 return; 176 case ENOTDIR: 177 fprintf(stderr, "%s: specification is incomplete\n", 178 string); 179 return; 180 case ENOMEM: 181 fprintf(stderr, "%s: type is unknown to this program\n", 182 string); 183 return; 184 default: 185 perror(string); 186 return; 187 } 188 } 189 if (!nflag) 190 fprintf(stdout, "%s = ", string); 191 fprintf(stdout, "%d\n", value); 192 } 193 194 /* 195 * Scan a list of names searching for a particular name. 196 */ 197 findname(string, level, bufp, namelist) 198 char *string; 199 const char *level; 200 char **bufp; 201 struct list *namelist; 202 { 203 char *name; 204 int i; 205 206 if (namelist->list == 0 || (name = strsep(bufp, ".")) == NULL) { 207 fprintf(stderr, "%s: incomplete specification\n", string); 208 return (-1); 209 } 210 for (i = 0; i < namelist->size; i++) 211 if (namelist->list[i].ctl_name != NULL && 212 strcmp(name, namelist->list[i].ctl_name) == 0) 213 break; 214 if (i == namelist->size) { 215 fprintf(stderr, "%s level name %s in %s is invalid\n", 216 level, name, string); 217 return (-1); 218 } 219 return (i); 220 } 221 222 usage() 223 { 224 225 (void)fprintf(stderr, "usage:\t%s\n\t%s\n\t%s\n", 226 "pathname [-n] variable ...", 227 "pathname [-n] -a", "pathname [-n] -A"); 228 exit(1); 229 } 230
Indexes created Sat Sep 20 22:09:52 GMT 2025