helpers.c (2655B)
1 /* Copyright (c) 2013, Bastien Dejean 2 * All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * 1. Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright notice, 10 * this list of conditions and the following disclaimer in the documentation 11 * and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 17 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 20 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 #include <stdio.h> 26 #include <stdlib.h> 27 #include <stdarg.h> 28 #include <string.h> 29 #include <unistd.h> 30 #include <ctype.h> 31 #include <sys/types.h> 32 #include <sys/wait.h> 33 #include "sxhkd.h" 34 35 void warn(char *fmt, ...) 36 { 37 va_list ap; 38 va_start(ap, fmt); 39 vfprintf(stderr, fmt, ap); 40 va_end(ap); 41 } 42 43 __attribute__((noreturn)) 44 void err(char *fmt, ...) 45 { 46 va_list ap; 47 va_start(ap, fmt); 48 vfprintf(stderr, fmt, ap); 49 va_end(ap); 50 exit(EXIT_FAILURE); 51 } 52 53 void run(char *command, bool sync) 54 { 55 char *cmd[] = {shell, "-c", command, NULL}; 56 spawn(cmd, sync); 57 } 58 59 void spawn(char *cmd[], bool sync) 60 { 61 if (fork() == 0) { 62 if (dpy != NULL) 63 close(xcb_get_file_descriptor(dpy)); 64 if (sync) { 65 execute(cmd); 66 } else { 67 if (fork() == 0) { 68 execute(cmd); 69 } 70 exit(EXIT_SUCCESS); 71 } 72 } 73 wait(NULL); 74 } 75 76 void execute(char *cmd[]) 77 { 78 setsid(); 79 if (redir_fd != -1) { 80 dup2(redir_fd, STDOUT_FILENO); 81 dup2(redir_fd, STDERR_FILENO); 82 } 83 execvp(cmd[0], cmd); 84 err("Spawning failed.\n"); 85 } 86 87 char *lgraph(char *s) 88 { 89 size_t len = strlen(s); 90 unsigned int i = 0; 91 while (i < len && !isgraph(s[i])) 92 i++; 93 if (i < len) 94 return (s + i); 95 else 96 return NULL; 97 } 98 99 char *rgraph(char *s) 100 { 101 int i = strlen(s) - 1; 102 while (i >= 0 && !isgraph(s[i])) 103 i--; 104 if (i >= 0) 105 return (s + i); 106 else 107 return NULL; 108 }