aewl: util.c annotate

annotate util.c @ 6:e0cefb3981c8

implemented pipe_spawn

author	Anselm R. Garbe <garbeam@wmii.de>
date	Tue, 11 Jul 2006 11:10:05 +0200
parents	e5018cae273f
children	d567f430a81d

rev	line source
2 a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	1 /*
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	3 * See LICENSE file for license details.
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	4 */
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	5
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	6 #include <stdarg.h>
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	7 #include <stdio.h>
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	8 #include <stdlib.h>
3 e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	9 #include <string.h>
5 e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	10 #include <sys/types.h>
e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	11 #include <sys/wait.h>
e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	12 #include <unistd.h>
e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	13
e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	14 #include "util.h"
2 a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	15
6 e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	16 static char *shell = NULL;
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	17
2 a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	18 void
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	19 error(char *errstr, ...) {
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	20 va_list ap;
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	21 va_start(ap, errstr);
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	22 vfprintf(stderr, errstr, ap);
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	23 va_end(ap);
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	24 exit(1);
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	25 }
a79188fe4a40 added new stuff Anselm R. Garbe <garbeam@wmii.de> parents: diff changeset	26
3 e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	27 static void
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	28 bad_malloc(unsigned int size)
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	29 {
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	30 fprintf(stderr, "fatal: could not malloc() %d bytes\n",
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	31 (int) size);
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	32 exit(1);
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	33 }
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	34
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	35 void *
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	36 emallocz(unsigned int size)
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	37 {
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	38 void *res = calloc(1, size);
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	39 if(!res)
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	40 bad_malloc(size);
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	41 return res;
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	42 }
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	43
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	44 void *
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	45 emalloc(unsigned int size)
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	46 {
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	47 void *res = malloc(size);
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	48 if(!res)
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	49 bad_malloc(size);
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	50 return res;
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	51 }
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	52
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	53 void *
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	54 erealloc(void *ptr, unsigned int size)
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	55 {
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	56 void *res = realloc(ptr, size);
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	57 if(!res)
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	58 bad_malloc(size);
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	59 return res;
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	60 }
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	61
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	62 char *
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	63 estrdup(const char *str)
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	64 {
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	65 void *res = strdup(str);
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	66 if(!res)
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	67 bad_malloc(strlen(str));
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	68 return res;
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	69 }
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	70
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	71 void
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	72 failed_assert(char a, char file, int line)
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	73 {
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	74 fprintf(stderr, "Assertion \"%s\" failed at %s:%d\n", a, file, line);
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	75 abort();
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	76 }
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	77
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	78 void
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	79 swap(void p1, void p2)
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	80 {
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	81 void tmp = p1;
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	82 p1 = p2;
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	83 *p2 = tmp;
e969f3575b7a several new changes, made gridmenu working Anselm R. Garbe <garbeam@wmii.de> parents: 2 diff changeset	84 }
5 e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	85
e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	86 void
6 e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	87 spawn(Display dpy, const char cmd)
5 e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	88 {
6 e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	89 if(!shell && !(shell = getenv("SHELL")))
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	90 shell = "/bin/sh";
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	91
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	92 if(!cmd)
5 e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	93 return;
e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	94 if(fork() == 0) {
e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	95 if(fork() == 0) {
6 e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	96 setsid();
5 e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	97 if(dpy)
e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	98 close(ConnectionNumber(dpy));
6 e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	99 execlp(shell, "shell", "-c", cmd, NULL);
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	100 fprintf(stderr, "gridwm: execvp %s", cmd);
5 e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	101 perror(" failed");
e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	102 }
e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	103 exit (0);
e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	104 }
e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	105 wait(0);
e5018cae273f added several other stuff Anselm R. Garbe <garbeam@wmii.de> parents: 3 diff changeset	106 }
6 e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	107
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	108 void
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	109 pipe_spawn(char buf, unsigned int len, Display dpy, const char *cmd)
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	110 {
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	111 unsigned int l, n;
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	112 int pfd[2];
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	113
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	114 if(!shell && !(shell = getenv("SHELL")))
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	115 shell = "/bin/sh";
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	116
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	117 if(!cmd)
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	118 return;
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	119
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	120 if(pipe(pfd) == -1) {
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	121 perror("pipe");
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	122 exit(1);
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	123 }
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	124
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	125 if(fork() == 0) {
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	126 setsid();
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	127 if(dpy)
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	128 close(ConnectionNumber(dpy));
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	129 dup2(pfd[1], STDOUT_FILENO);
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	130 close(pfd[0]);
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	131 close(pfd[1]);
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	132 execlp(shell, "shell", "-c", cmd, NULL);
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	133 fprintf(stderr, "gridwm: execvp %s", cmd);
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	134 perror(" failed");
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	135 }
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	136 else {
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	137 n = 0;
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	138 close(pfd[1]);
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	139 while(l > n) {
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	140 if((l = read(pfd[0], buf + n, len - n)) < 1)
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	141 break;
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	142 n += l;
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	143 }
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	144 close(pfd[0]);
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	145 buf[n - 1] = 0;
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	146 }
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	147 wait(0);
e0cefb3981c8 implemented pipe_spawn Anselm R. Garbe <garbeam@wmii.de> parents: 5 diff changeset	148 }

Mercurial > aewl

annotate util.c @ 6:e0cefb3981c8