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annotate util.c @ 52:d18f6dd0cf23

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fixed several things, nearly feature complete
author Anselm R. Garbe <garbeam@wmii.de>
date Thu, 13 Jul 2006 20:28:19 +0200
parents 466591c2f967
children f14858218641
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1 /*
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2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
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3 * See LICENSE file for license details.
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4 */
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5
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6 #include <stdarg.h>
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10 #include <sys/types.h>
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11 #include <sys/wait.h>
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12 #include <unistd.h>
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13
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14 #include "dwm.h"
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15
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16 void
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17 error(const char *errstr, ...) {
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18 va_list ap;
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19 va_start(ap, errstr);
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20 vfprintf(stderr, errstr, ap);
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21 va_end(ap);
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22 exit(1);
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23 }
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24
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25 static void
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26 bad_malloc(unsigned int size)
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27 {
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28 fprintf(stderr, "fatal: could not malloc() %d bytes\n",
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29 (int) size);
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30 exit(1);
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31 }
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32
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33 void *
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34 emallocz(unsigned int size)
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35 {
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36 void *res = calloc(1, size);
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37 if(!res)
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38 bad_malloc(size);
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39 return res;
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40 }
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41
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42 void *
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43 emalloc(unsigned int size)
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44 {
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45 void *res = malloc(size);
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46 if(!res)
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47 bad_malloc(size);
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48 return res;
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49 }
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50
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51 void *
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52 erealloc(void *ptr, unsigned int size)
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53 {
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54 void *res = realloc(ptr, size);
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55 if(!res)
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56 bad_malloc(size);
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57 return res;
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58 }
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59
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60 char *
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61 estrdup(const char *str)
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62 {
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63 char *res = strdup(str);
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64 if(!res)
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65 bad_malloc(strlen(str));
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66 return res;
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67 }
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68
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69 void
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70 swap(void **p1, void **p2)
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71 {
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72 void *tmp = *p1;
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73 *p1 = *p2;
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74 *p2 = tmp;
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75 }
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76
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77 void
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78 spawn(Arg *arg)
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79 {
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80 char **argv = (char **)arg->argv;
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81 if(!argv || !argv[0])
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82 return;
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83 if(fork() == 0) {
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84 if(fork() == 0) {
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85 if(dpy)
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86 close(ConnectionNumber(dpy));
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87 setsid();
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88 execvp(argv[0], argv);
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89 fprintf(stderr, "dwm: execvp %s", argv[0]);
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90 perror(" failed");
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91 }
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92 exit (0);
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93 }
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94 wait(0);
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95 }