1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1992, 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 #include <sys/cdefs.h> 33 34 __FBSDID("$FreeBSD$"); 35 36 #ifdef lint 37 static const char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95"; 38 #endif 39 40 #include <sys/param.h> 41 42 #include <ctype.h> 43 #include <signal.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 #include "systat.h" 49 #include "extern.h" 50 51 void 52 command(const char *cmd) 53 { 54 struct cmdtab *p; 55 char *cp, *tmpstr, *tmpstr1; 56 double t; 57 58 tmpstr = tmpstr1 = strdup(cmd); 59 for (cp = tmpstr1; *cp && !isspace(*cp); cp++) 60 ; 61 if (*cp) 62 *cp++ = '\0'; 63 if (*tmpstr1 == '\0') 64 goto done; 65 for (; *cp && isspace(*cp); cp++) 66 ; 67 if (strcmp(tmpstr1, "quit") == 0 || strcmp(tmpstr1, "q") == 0) 68 die(0); 69 if (strcmp(tmpstr1, "load") == 0) { 70 load(); 71 goto done; 72 } 73 if (strcmp(tmpstr1, "stop") == 0) { 74 delay = 0; 75 mvaddstr(CMDLINE, 0, "Refresh disabled."); 76 clrtoeol(); 77 goto done; 78 } 79 if (strcmp(tmpstr1, "help") == 0) { 80 int _col, _len; 81 82 move(CMDLINE, _col = 0); 83 for (p = cmdtab; p->c_name; p++) { 84 _len = strlen(p->c_name); 85 if (_col + _len > COLS) 86 break; 87 addstr(p->c_name); _col += _len; 88 if (_col + 1 < COLS) 89 addch(' '); 90 } 91 clrtoeol(); 92 goto done; 93 } 94 t = strtod(tmpstr1, NULL) * 1000000.0; 95 if (t > 0 && t < (double)UINT_MAX) 96 delay = (unsigned int)t; 97 if ((t <= 0 || t > (double)UINT_MAX) && 98 (strcmp(tmpstr1, "start") == 0 || 99 strcmp(tmpstr1, "interval") == 0)) { 100 if (*cp != '\0') { 101 t = strtod(cp, NULL) * 1000000.0; 102 if (t <= 0 || t >= (double)UINT_MAX) { 103 error("%d: bad interval.", (int)t); 104 goto done; 105 } 106 } 107 } 108 if (t > 0) { 109 delay = (unsigned int)t; 110 display(); 111 status(); 112 goto done; 113 } 114 p = lookup(tmpstr1); 115 if (p == (struct cmdtab *)-1) { 116 error("%s: Ambiguous command.", tmpstr1); 117 goto done; 118 } 119 if (p) { 120 if (curcmd == p) 121 goto done; 122 (*curcmd->c_close)(wnd); 123 curcmd->c_flags &= ~CF_INIT; 124 wnd = (*p->c_open)(); 125 if (wnd == NULL) { 126 error("Couldn't open new display"); 127 wnd = (*curcmd->c_open)(); 128 if (wnd == NULL) { 129 error("Couldn't change back to previous cmd"); 130 exit(1); 131 } 132 p = curcmd; 133 } 134 if ((p->c_flags & CF_INIT) == 0) { 135 if ((*p->c_init)()) 136 p->c_flags |= CF_INIT; 137 else 138 goto done; 139 } 140 curcmd = p; 141 labels(); 142 display(); 143 status(); 144 goto done; 145 } 146 if (curcmd->c_cmd == NULL || !(*curcmd->c_cmd)(tmpstr1, cp)) 147 error("%s: Unknown command.", tmpstr1); 148 done: 149 free(tmpstr); 150 } 151 152 struct cmdtab * 153 lookup(const char *name) 154 { 155 const char *p, *q; 156 struct cmdtab *ct, *found; 157 int nmatches, longest; 158 159 longest = 0; 160 nmatches = 0; 161 found = (struct cmdtab *) 0; 162 for (ct = cmdtab; (p = ct->c_name); ct++) { 163 for (q = name; *q == *p++; q++) 164 if (*q == 0) /* exact match? */ 165 return (ct); 166 if (!*q) { /* the name was a prefix */ 167 if (q - name > longest) { 168 longest = q - name; 169 nmatches = 1; 170 found = ct; 171 } else if (q - name == longest) 172 nmatches++; 173 } 174 } 175 if (nmatches > 1) 176 return ((struct cmdtab *)-1); 177 return (found); 178 } 179 180 void 181 status(void) 182 { 183 184 error("Showing %s, refresh every %d seconds.", 185 curcmd->c_name, delay / 1000000); 186 } 187 188 int 189 prefix(const char *s1, const char *s2) 190 { 191 192 while (*s1 == *s2) { 193 if (*s1 == '\0') 194 return (1); 195 s1++, s2++; 196 } 197 return (*s1 == '\0'); 198 } 199