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WebSVN – planix.SVN – Blame – /os/branches/feature_posix/sys/src/9/boot/aux.c – Rev 2

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#include <u.h>
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#include <libc.h>
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#include <../boot/boot.h>
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/*
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int
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plumb(char *dir, char *dest, int *efd, char *here)
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{
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	char buf[128];
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	char name[128];
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	int n;
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	sprint(name, "%s/clone", dir);
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	efd[0] = open(name, ORDWR);
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	if(efd[0] < 0)
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		return -1;
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	n = read(efd[0], buf, sizeof(buf)-1);
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	if(n < 0){
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		close(efd[0]);
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		return -1;
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	}
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	buf[n] = 0;
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	sprint(name, "%s/%s/data", dir, buf);
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	if(here){
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		sprint(buf, "announce %s", here);
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		if(sendmsg(efd[0], buf) < 0){
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			close(efd[0]);
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			return -1;
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		}
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	}
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	sprint(buf, "connect %s", dest);
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	if(sendmsg(efd[0], buf) < 0){
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		close(efd[0]);
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		return -1;
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	}
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	efd[1] = open(name, ORDWR);
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	if(efd[1] < 0){
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		close(efd[0]);
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		return -1;
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	}
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	return efd[1];
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}
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int
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sendmsg(int fd, char *msg)
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{
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	int n;
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	n = strlen(msg);
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	if(write(fd, msg, n) != n)
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		return -1;
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	return 0;
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}
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 */
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void
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warning(char *s)
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{
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	char buf[ERRMAX];
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	buf[0] = '\0';
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	errstr(buf, sizeof buf);
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	fprint(2, "boot: %s: %s\n", s, buf);
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}
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void
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fatal(char *s)
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{
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	char *msg;
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	char buf[ERRMAX];
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	buf[0] = '\0';
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	errstr(buf, sizeof buf);
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	msg = smprint("%s: %s", s, buf);
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	fprint(2, "boot: %s\n", msg);
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	exits(msg);			/* this will trigger a panic */
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}
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int
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readfile(char *name, char *buf, int len)
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{
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	int f, n;
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	buf[0] = 0;
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	f = open(name, OREAD);
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	if(f < 0)
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		return -1;
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	n = read(f, buf, len-1);
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	if(n >= 0)
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		buf[n] = 0;
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	close(f);
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	return 0;
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}
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int
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writefile(char *name, char *buf, int len)
97 
{
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	int f, n;
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100 
	f = open(name, OWRITE);
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	if(f < 0)
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		return -1;
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	n = write(f, buf, len);
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	close(f);
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	return (n != len) ? -1 : 0;
106 
}
107 
 
108 
void
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setenv(char *name, char *val)
110 
{
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	int f;
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	char ename[64];
113 
 
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	snprint(ename, sizeof ename, "#e/%s", name);
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	f = create(ename, 1, 0666);
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	if(f < 0){
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		fprint(2, "create %s: %r\n", ename);
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		return;
119 
	}
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	write(f, val, strlen(val));
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	close(f);
122 
}
123 
 
124 
void
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srvcreate(char *name, int fd)
126 
{
127 
	char *srvname;
128 
	int f;
129 
	char buf[64];
130 
 
131 
	srvname = strrchr(name, '/');
132 
	if(srvname)
133 
		srvname++;
134 
	else
135 
		srvname = name;
136 
 
137 
	snprint(buf, sizeof buf, "#s/%s", srvname);
138 
	f = create(buf, 1, 0666);
139 
	if(f < 0)
140 
		fatal(buf);
141 
	sprint(buf, "%d", fd);
142 
	if(write(f, buf, strlen(buf)) != strlen(buf))
143 
		fatal("write");
144 
	close(f);
145 
}
146 
 
147 
void
148 
catchint(void *a, char *note)
149 
{
150 
	USED(a);
151 
	if(strcmp(note, "alarm") == 0)
152 
		noted(NCONT);
153 
	noted(NDFLT);
154 
}
155 
 
156 
int
157 
outin(char *prompt, char *def, int len)
158 
{
159 
	int n;
160 
	char buf[256];
161 
 
162 
	if(len >= sizeof buf)
163 
		len = sizeof(buf)-1;
164 
 
165 
	if(cpuflag){
166 
		notify(catchint);
167 
		alarm(15*1000);
168 
	}
169 
	print("%s[%s]: ", prompt, *def ? def : "no default");
170 
	memset(buf, 0, sizeof buf);
171 
	n = read(0, buf, len);
172 
	if(cpuflag){
173 
		alarm(0);
174 
		notify(0);
175 
	}
176 
 
177 
	if(n < 0)
178 
		return 1;
179 
	if(n > 1){
180 
		buf[n-1] = 0;
181 
		strcpy(def, buf);
182 
	}
183 
	return n;
184 
}