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