1 /*- 2 * Copyright (c) 1980, 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 36 __FBSDID("$FreeBSD$"); 37 38 #ifdef lint 39 static const char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95"; 40 #endif 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(cmd) 53 const char *cmd; 54 { 55 struct cmdtab *p; 56 char *cp, *tmpstr, *tmpstr1; 57 int interval, omask; 58 59 tmpstr = tmpstr1 = strdup(cmd); 60 omask = sigblock(sigmask(SIGALRM)); 61 for (cp = tmpstr1; *cp && !isspace(*cp); cp++) 62 ; 63 if (*cp) 64 *cp++ = '\0'; 65 if (*tmpstr1 == '\0') 66 return; 67 for (; *cp && isspace(*cp); cp++) 68 ; 69 if (strcmp(tmpstr1, "quit") == 0 || strcmp(tmpstr1, "q") == 0) 70 die(0); 71 if (strcmp(tmpstr1, "load") == 0) { 72 load(); 73 goto done; 74 } 75 if (strcmp(tmpstr1, "stop") == 0) { 76 alarm(0); 77 mvaddstr(CMDLINE, 0, "Refresh disabled."); 78 clrtoeol(); 79 goto done; 80 } 81 if (strcmp(tmpstr1, "help") == 0) { 82 int _col, _len; 83 84 move(CMDLINE, _col = 0); 85 for (p = cmdtab; p->c_name; p++) { 86 _len = strlen(p->c_name); 87 if (_col + _len > COLS) 88 break; 89 addstr(p->c_name); _col += _len; 90 if (_col + 1 < COLS) 91 addch(' '); 92 } 93 clrtoeol(); 94 goto done; 95 } 96 interval = atoi(tmpstr1); 97 if (interval <= 0 && 98 (strcmp(tmpstr1, "start") == 0 || strcmp(tmpstr1, "interval") == 0)) { 99 interval = *cp ? atoi(cp) : naptime; 100 if (interval <= 0) { 101 error("%d: bad interval.", interval); 102 goto done; 103 } 104 } 105 if (interval > 0) { 106 alarm(0); 107 naptime = interval; 108 display(0); 109 status(); 110 goto done; 111 } 112 p = lookup(tmpstr1); 113 if (p == (struct cmdtab *)-1) { 114 error("%s: Ambiguous command.", tmpstr1); 115 goto done; 116 } 117 if (p) { 118 if (curcmd == p) 119 goto done; 120 alarm(0); 121 (*curcmd->c_close)(wnd); 122 curcmd->c_flags &= ~CF_INIT; 123 wnd = (*p->c_open)(); 124 if (wnd == 0) { 125 error("Couldn't open new display"); 126 wnd = (*curcmd->c_open)(); 127 if (wnd == 0) { 128 error("Couldn't change back to previous cmd"); 129 exit(1); 130 } 131 p = curcmd; 132 } 133 if ((p->c_flags & CF_INIT) == 0) { 134 if ((*p->c_init)()) 135 p->c_flags |= CF_INIT; 136 else 137 goto done; 138 } 139 curcmd = p; 140 labels(); 141 display(0); 142 status(); 143 goto done; 144 } 145 if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(tmpstr1, cp)) 146 error("%s: Unknown command.", tmpstr1); 147 done: 148 sigsetmask(omask); 149 free(tmpstr); 150 } 151 152 struct cmdtab * 153 lookup(name) 154 const char *name; 155 { 156 const char *p, *q; 157 struct cmdtab *ct, *found; 158 int nmatches, longest; 159 160 longest = 0; 161 nmatches = 0; 162 found = (struct cmdtab *) 0; 163 for (ct = cmdtab; (p = ct->c_name); ct++) { 164 for (q = name; *q == *p++; q++) 165 if (*q == 0) /* exact match? */ 166 return (ct); 167 if (!*q) { /* the name was a prefix */ 168 if (q - name > longest) { 169 longest = q - name; 170 nmatches = 1; 171 found = ct; 172 } else if (q - name == longest) 173 nmatches++; 174 } 175 } 176 if (nmatches > 1) 177 return ((struct cmdtab *)-1); 178 return (found); 179 } 180 181 void 182 status() 183 { 184 185 error("Showing %s, refresh every %d seconds.", 186 curcmd->c_name, naptime); 187 } 188 189 int 190 prefix(s1, s2) 191 const char *s1, *s2; 192 { 193 194 while (*s1 == *s2) { 195 if (*s1 == '\0') 196 return (1); 197 s1++, s2++; 198 } 199 return (*s1 == '\0'); 200 } 201