dwm-meillo

annotate util.c @ 60:24f9c674d03f

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made stdin reader more robust
author Anselm R. Garbe <garbeam@wmii.de>
date Fri, 14 Jul 2006 12:08:32 +0200
parents 989178822938
children f14858218641
rev   line source
garbeam@2 1 /*
garbeam@2 2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
garbeam@2 3 * See LICENSE file for license details.
garbeam@2 4 */
garbeam@2 5
garbeam@2 6 #include <stdarg.h>
garbeam@2 7 #include <stdio.h>
garbeam@2 8 #include <stdlib.h>
garbeam@3 9 #include <string.h>
garbeam@5 10 #include <sys/types.h>
garbeam@5 11 #include <sys/wait.h>
garbeam@5 12 #include <unistd.h>
garbeam@5 13
garbeam@43 14 #include "dwm.h"
garbeam@2 15
garbeam@2 16 void
garbeam@33 17 error(const char *errstr, ...) {
garbeam@2 18 va_list ap;
garbeam@2 19 va_start(ap, errstr);
garbeam@2 20 vfprintf(stderr, errstr, ap);
garbeam@2 21 va_end(ap);
garbeam@2 22 exit(1);
garbeam@2 23 }
garbeam@2 24
garbeam@3 25 static void
garbeam@3 26 bad_malloc(unsigned int size)
garbeam@3 27 {
garbeam@3 28 fprintf(stderr, "fatal: could not malloc() %d bytes\n",
garbeam@3 29 (int) size);
garbeam@3 30 exit(1);
garbeam@3 31 }
garbeam@3 32
garbeam@3 33 void *
garbeam@3 34 emallocz(unsigned int size)
garbeam@3 35 {
garbeam@3 36 void *res = calloc(1, size);
garbeam@3 37 if(!res)
garbeam@3 38 bad_malloc(size);
garbeam@3 39 return res;
garbeam@3 40 }
garbeam@3 41
garbeam@3 42 void *
garbeam@3 43 emalloc(unsigned int size)
garbeam@3 44 {
garbeam@3 45 void *res = malloc(size);
garbeam@3 46 if(!res)
garbeam@3 47 bad_malloc(size);
garbeam@3 48 return res;
garbeam@3 49 }
garbeam@3 50
garbeam@3 51 void *
garbeam@3 52 erealloc(void *ptr, unsigned int size)
garbeam@3 53 {
garbeam@3 54 void *res = realloc(ptr, size);
garbeam@3 55 if(!res)
garbeam@3 56 bad_malloc(size);
garbeam@3 57 return res;
garbeam@3 58 }
garbeam@3 59
garbeam@3 60 char *
garbeam@3 61 estrdup(const char *str)
garbeam@3 62 {
garbeam@32 63 char *res = strdup(str);
garbeam@3 64 if(!res)
garbeam@3 65 bad_malloc(strlen(str));
garbeam@3 66 return res;
garbeam@3 67 }
garbeam@3 68
garbeam@3 69 void
garbeam@3 70 swap(void **p1, void **p2)
garbeam@3 71 {
garbeam@3 72 void *tmp = *p1;
garbeam@3 73 *p1 = *p2;
garbeam@3 74 *p2 = tmp;
garbeam@3 75 }
garbeam@5 76
garbeam@5 77 void
garbeam@49 78 spawn(Arg *arg)
garbeam@5 79 {
garbeam@49 80 char **argv = (char **)arg->argv;
garbeam@14 81 if(!argv || !argv[0])
garbeam@5 82 return;
garbeam@5 83 if(fork() == 0) {
garbeam@5 84 if(fork() == 0) {
garbeam@5 85 if(dpy)
garbeam@5 86 close(ConnectionNumber(dpy));
garbeam@9 87 setsid();
garbeam@14 88 execvp(argv[0], argv);
garbeam@34 89 fprintf(stderr, "dwm: execvp %s", argv[0]);
garbeam@5 90 perror(" failed");
garbeam@5 91 }
garbeam@5 92 exit (0);
garbeam@5 93 }
garbeam@5 94 wait(0);
garbeam@5 95 }