9os

Experimental kernel using plan9 ideas for embedded device
git clone git://git.simple-cc.org/9os
Log | Files | Refs | README | LICENSE

sys.c (2080B)

      1 #include <os9/os9.h>
      2 
      3 #include <libk.h>
      4 
      5 #include <ctype.h>
      6 #include <string.h>
      7 
      8 #include "version.h"
      9 
     10 Chan *console;
     11 
     12 static void
     13 icons(void)
     14 {
     15 	if ((console = namec("#c/raw", O_RDWR)) == NULL)
     16 		panic("icons:#c/raw open");
     17 }
     18 
     19 static void
     20 writeline(char *line)
     21 {
     22 	Chan *c;
     23 	char *p, *file, *data;
     24 
     25 	file = p = line;
     26 	while (*p && !isspace(*p))
     27 		++p;
     28 	while (isspace(*p))
     29 		*p++ = '\0';
     30 	data = p;
     31 
     32 	if ((c = namec(file, O_WRITE)) < 0)
     33 		panic("writeline:open");
     34 	if (chanwrite(c, data, strlen(data)) < 0)
     35 		panic("writeline:write");
     36 	chanclose(c);
     37 }
     38 
     39 static void
     40 bindline(char *line)
     41 {
     42 	int n;
     43 	char *tokens[10];
     44 
     45 	n = tokenize(line, strlen(line), tokens, NELEM(tokens));
     46 	if (n != 2)
     47 		panic("bindline:params");
     48 	if (bind(tokens[0], tokens[1]) < 0)
     49 		panic("bindline:bind");
     50 }
     51 
     52 static void
     53 mountline(char *line)
     54 {
     55 	int n;
     56 	char *tokens[10];
     57 
     58 	n = tokenize(line, strlen(line), tokens, NELEM(tokens));
     59 	if (n != 3)
     60 		panic("mountline:params");
     61 	if (mount(tokens[0], tokens[1], tokens[2]) < 0)
     62 		panic("mountline:mount");
     63 }
     64 
     65 static void
     66 iconf(void)
     67 {
     68 	int n;
     69 	Chan *c;
     70 	char line[80], *s, *p;
     71 	static struct {
     72 		char *verb;
     73 		void (*fn)(char *);
     74 	} words[] = {
     75 		"write", writeline,
     76 		"bind", bindline,
     77 		"mount", mountline,
     78 		NULL
     79 	}, *bp;
     80 
     81 	if ((c = namec("/blobs/conf", O_READ)) == NULL) {
     82 		kprint("missed kernel namespace configuration\n");
     83 		return;
     84 	}
     85 
     86 	while ((n = getline(c, line, sizeof(line))) > 0) {
     87 		if (line[n-1] != '\n') {
     88 			kprint("iconf: truncated configuration line\n");
     89 			continue;
     90 		}
     91 		for (p = line; isspace(*p); ++p)
     92 			;
     93 		s = p;
     94 		while (*p && !isspace(*p))
     95 			++p;
     96 		while (isspace(*p))
     97 			*p++ = '\0';
     98 
     99 		for (bp = words; bp->verb; ++bp) {
    100 			if (strcmp(s, bp->verb) == 0) {
    101 				(*bp->fn)(p);
    102 				break;
    103 			}
    104 		}
    105 
    106 		if (!bp->verb)
    107 			kprint("iconf: incorrect verb '%s'\n", s);
    108 	}
    109 
    110 	if (n < 0)
    111 		kprint("iconf: error reading configuration:%r\n");
    112 
    113 	chanclose(c);
    114 }
    115 
    116 static void
    117 info(void)
    118 {
    119 	kprint("Booting os9\n");
    120 	kprint("os9: version %s\n", OS9VERSION);
    121 }
    122 
    123 void
    124 isys(void)
    125 {
    126 	info();
    127 	ialloc();
    128 	iproc();
    129 	idev();
    130 	iconf();
    131 	icons();
    132 	sched();
    133 }