1992/0617/boot/aux.c (diff list | history)

boot/aux.c on 1992/0317
1992/0317		#include <u.h> #include <libc.h> #include <../boot/boot.h> int plumb(char *dir, char *dest, int *efd, char *here) { char buf[128]; char name[128]; int n; sprint(name, "%s/clone", dir); efd[0] = open(name, ORDWR); if(efd[0] < 0) return -1; n = read(efd[0], buf, sizeof(buf)-1); if(n < 0){ close(efd[0]); return -1; } buf[n] = 0; sprint(name, "%s/%s/data", dir, buf); if(here){ sprint(buf, "announce %s", here); if(sendmsg(efd[0], buf) < 0){ close(efd[0]); return -1; } } sprint(buf, "connect %s", dest); if(sendmsg(efd[0], buf) < 0){ close(efd[0]); return -1; } efd[1] = open(name, ORDWR); if(efd[1] < 0){ close(efd[0]); return -1; } return efd[1]; } int sendmsg(int fd, char *msg) { int n; n = strlen(msg); if(write(fd, msg, n) != n) return -1; return 0; } void warning(char *s) { char buf[ERRLEN]; errstr(buf); fprint(2, "boot: %s: %s\n", s, buf); } void fatal(char *s) { char buf[ERRLEN]; errstr(buf); fprint(2, "boot: %s: %s\n", s, buf); exits(0); } int
1992/0610		readfile(char *name, char *buf, int len)
1992/0317		{ int f, n; buf[0] = 0;
1992/0610		f = open(name, OREAD);
1992/0317		if(f < 0) return -1; n = read(f, buf, len-1); if(n >= 0) buf[n] = 0; close(f); return 0; } void setenv(char *name, char *val) { int f; char ename[2*NAMELEN]; sprint(ename, "#e/%s", name); f = create(ename, 1, 0666); if(f < 0) return; write(f, val, strlen(val)); close(f); } void srvcreate(char *name, int fd) { char *srvname; int f;
1992/0318		char buf[2*NAMELEN];
1992/0317		srvname = strrchr(name, '/'); if(srvname) srvname++; else srvname = name; sprint(buf, "#s/%s", srvname); f = create(buf, 1, 0666); if(f < 0) fatal(buf); sprint(buf, "%d", fd); if(write(f, buf, strlen(buf)) != strlen(buf)) fatal("write"); close(f); } int outin(char *prompt, char *def, int len) { int n; char buf[256];
1992/0617		if(cpuflag) alarm(60*1000);
1992/0317		do{ print("%s[%s]: ", prompt, *def ? def : "no default"); n = read(0, buf, len); }while(n==0);
1992/0617		if(cpuflag) alarm(0);
1992/0317		if(n < 0)
1992/0609		fatal("can't read #c/cons or timeout; please reboot");
1992/0317		if(n != 1){ buf[n-1] = 0; strcpy(def, buf); } return n; }
1992/0530
1992/0610		/* * get second word of the terminal environment variable. If it * ends in "boot", get work of that part. */
1992/0530		void getconffile(char *conffile, char *terminal) { char *p, *q;
1992/0610		char *s; int n;
1992/0530
1992/0610		s = conffile;
1992/0530		*conffile = 0; p = terminal; if((p = strchr(p, ' ')) == 0 || p[1] == ' ' || p[1] == 0) return; p++; for(q = p; *q && *q != ' '; q++) ; while(p < q) *conffile++ = *p++;
1992/0610		*conffile = 0; /* dump a trailig boot */ n = strlen(s); if(n > 4 && strcmp(s + n - 4, "boot") == 0) *(s+n-4) = 0;
1992/0530		}