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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 32 __FBSDID("$FreeBSD$"); 33 34 #ifdef lint 35 static const char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95"; 36 #endif 37 38 #include <ctype.h> 39 #include <signal.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 #include "systat.h" 45 #include "extern.h" 46 47 void 48 command(const char *cmd) 49 { 50 struct cmdtab *p; 51 char *cp, *tmpstr, *tmpstr1; 52 int interval, omask; 53 54 tmpstr = tmpstr1 = strdup(cmd); 55 omask = sigblock(sigmask(SIGALRM)); 56 for (cp = tmpstr1; *cp && !isspace(*cp); cp++) 57 ; 58 if (*cp) 59 *cp++ = '\0'; 60 if (*tmpstr1 == '\0') 61 return; 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 alarm(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 interval = atoi(tmpstr1); 92 if (interval <= 0 && 93 (strcmp(tmpstr1, "start") == 0 || strcmp(tmpstr1, "interval") == 0)) { 94 interval = *cp ? atoi(cp) : naptime; 95 if (interval <= 0) { 96 error("%d: bad interval.", interval); 97 goto done; 98 } 99 } 100 if (interval > 0) { 101 alarm(0); 102 naptime = interval; 103 display(0); 104 status(); 105 goto done; 106 } 107 p = lookup(tmpstr1); 108 if (p == (struct cmdtab *)-1) { 109 error("%s: Ambiguous command.", tmpstr1); 110 goto done; 111 } 112 if (p) { 113 if (curcmd == p) 114 goto done; 115 alarm(0); 116 (*curcmd->c_close)(wnd); 117 curcmd->c_flags &= ~CF_INIT; 118 wnd = (*p->c_open)(); 119 if (wnd == 0) { 120 error("Couldn't open new display"); 121 wnd = (*curcmd->c_open)(); 122 if (wnd == 0) { 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(0); 137 status(); 138 goto done; 139 } 140 if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(tmpstr1, cp)) 141 error("%s: Unknown command.", tmpstr1); 142 done: 143 sigsetmask(omask); 144 free(tmpstr); 145 } 146 147 struct cmdtab * 148 lookup(const char *name) 149 { 150 const char *p, *q; 151 struct cmdtab *ct, *found; 152 int nmatches, longest; 153 154 longest = 0; 155 nmatches = 0; 156 found = (struct cmdtab *) 0; 157 for (ct = cmdtab; (p = ct->c_name); ct++) { 158 for (q = name; *q == *p++; q++) 159 if (*q == 0) /* exact match? */ 160 return (ct); 161 if (!*q) { /* the name was a prefix */ 162 if (q - name > longest) { 163 longest = q - name; 164 nmatches = 1; 165 found = ct; 166 } else if (q - name == longest) 167 nmatches++; 168 } 169 } 170 if (nmatches > 1) 171 return ((struct cmdtab *)-1); 172 return (found); 173 } 174 175 void 176 status(void) 177 { 178 179 error("Showing %s, refresh every %d seconds.", 180 curcmd->c_name, naptime); 181 } 182 183 int 184 prefix(const char *s1, const char *s2) 185 { 186 187 while (*s1 == *s2) { 188 if (*s1 == '\0') 189 return (1); 190 s1++, s2++; 191 } 192 return (*s1 == '\0'); 193 } 194