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bmon

    1: /*
    2:  * bindings.c	     Key Bindings
    3:  *
    4:  * Copyright (c) 2001-2005 Thomas Graf <tgraf@suug.ch>
    5:  *
    6:  * Permission is hereby granted, free of charge, to any person obtaining a
    7:  * copy of this software and associated documentation files (the "Software"),
    8:  * to deal in the Software without restriction, including without limitation
    9:  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   10:  * and/or sell copies of the Software, and to permit persons to whom the
   11:  * Software is furnished to do so, subject to the following conditions:
   12:  *
   13:  * The above copyright notice and this permission notice shall be included
   14:  * in all copies or substantial portions of the Software.
   15:  *
   16:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   17:  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   18:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
   19:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   20:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   21:  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   22:  * DEALINGS IN THE SOFTWARE.
   23:  */
   24: 
   25: #include <bmon/bmon.h>
   26: #include <bmon/bindings.h>
   27: #include <bmon/utils.h>
   28: 
   29: static binding_t *bindings;
   30: 
   31: void add_binding(binding_t *b)
   32: {
   33: 	b->next = bindings;
   34: 	bindings = b;
   35: }
   36: 
   37: static void run_binding(binding_t *b, const char *args_)
   38: {
   39: 	pid_t pid;
   40: 	int i, n;
   41: 	char *s, *args = strdup(args_);
   42: 
   43: 	for (i = 1; b->args[i]; i++);
   44: 	n = i;
   45: 	
   46: 	if (i < 255)
   47: 	b->args[i++] = args;
   48: 	
   49: 	for (s = args; i < 255; i++) {
   50: 		s = strchr (s, ' ');
   51: 		if (s) {
   52: 			*s = '\0';
   53: 			s++;
   54: 			b->args[i] = s;
   55: 		} else
   56: 			break;
   57: 	}
   58: 
   59: 	b->args[i] = NULL;
   60: 
   61: 	pid = fork();
   62: 	if (pid < 0)
   63: 		quit("fork error: %s\n", strerror(errno));
   64: 	else if (pid) {
   65: 		/* parent */
   66: 		b->args[n] = NULL;
   67: 		return;
   68: 	}
   69: 	
   70: 	/* child */
   71: 
   72: #ifdef HAVE_FCLOSEALL
   73: 	fcloseall();
   74: #else
   75: 	for (i = 0; i < 256; i++)
   76: 		close(i);
   77: #endif
   78: 	
   79: 	if (execve(b->cmd, b->args, NULL) < 0)
   80: 		quit("execve failed: %s\n", strerror(errno));
   81: 	
   82: 	/* this is only needed in case execve fails */
   83: 	_exit(0);
   84: }
   85: 
   86: int handle_bindings(int ch, const char *args)
   87: {
   88: 	binding_t *b;
   89: 
   90: 	for (b = bindings; b; b = b->next) {
   91: 		if (ch == b->ch) {
   92: 			run_binding(b, args);
   93: 			return 1;
   94: 		}
   95: 	}
   96: 
   97: 	return 0;
   98: }