GopherProxy

	dev.c - smdev - suckless mdev
	git clone git://git.suckless.org/smdev
	Log
	Files
	Refs
	README
	LICENSE
	---
	dev.c (1034B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <sys/stat.h>
	3 #include <fcntl.h>
	4 #include <unistd.h>
	5 #include <limits.h>
	6 #include <stdlib.h>
	7 #include <stdio.h>
	8 #include <string.h>
	9 #include "../util.h"
	10
	11 /* read uevent file and set environment variables */
	12 int
	13 readuevent(const char *file)
	14 {
	15 FILE *fp;
	16 int status = 0;
	17 char buf[BUFSIZ];
	18 char p, name, *value;
	19
	20 if(!(fp = fopen(file, "r")))
	21 return -1;
	22 while(!feof(fp)) {
	23 fgets(buf, sizeof(buf) - 1, fp);
	24 if(ferror(fp)) {
	25 status = -2;
	26 break;
	27 }
	28 if((p = strchr(buf, '\n')))
	29 *p = '\0';
	30 if(!(p = strchr(buf, '=')))
	31 continue;
	32 *p = '\0';
	33 p++;
	34 name = buf;
	35 value = p;
	36 setenv(name, value, 1);
	37 }
	38 fclose(fp);
	39 return status;
	40 }
	41
	42 /* `majmin' format is maj:min */
	43 int
	44 devtype(const char *majmin)
	45 {
	46 char path[PATH_MAX];
	47
	48 snprintf(path, sizeof(path), "/sys/dev/block/%s", majmin);
	49 if (!access(path, F_OK))
	50 return S_IFBLK;
	51 snprintf(path, sizeof(path), "/sys/dev/char/%s", majmin);
	52 if (!access(path, F_OK))
	53 return S_IFCHR;
	54 return -1;
	55 }