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	fifo.c (835B)
	---
	1 /*
	2 * send anything in dwm status bar with fifo
	3 * example : echo "hello" >> /tmp/dwm.fifo
	4 * Author: Xavier Cartron (XC), [email protected]
	5 */
	6
	7 #include <stdio.h>
	8 #include <stdlib.h>
	9 #include <string.h>
	10 #include <fcntl.h>
	11 #include <sys/types.h>
	12 #include <sys/stat.h>
	13
	14 #define FIFO "/tmp/dwm.fifo"
	15
	16 char *
	17 snotif()
	18 {
	19 char buf[BUFSIZ];
	20 int len = 0;
	21
	22 int f = open(FIFO, O_NONBLOCK \| O_RDWR);
	23 if (f == -1){
	24 return smprintf("%s","");
	25 }
	26
	27 len = read(f, buf, sizeof(buf));
	28 if (len == -1){
	29 perror("fifo read");
	30 close(f);
	31 return smprintf("%s","");
	32 }
	33 close(f);
	34
	35 buf[len-1] = ' ';
	36
	37 return smprintf("%s",buf);
	38 }
	39
	40 int
	41 main(void)
	42 {
	43 int ret = 0;
	44 ret = mkfifo(FIFO, ACCESSPERMS);
	45 if (ret == -1) perror("fifo creation");
	46
	47 // your code
	48
	49 return 0;
	50 }