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