#include "lib.h"#include <stdlib.h>#include <sys/stat.h>#include <fcntl.h>#include <dirent.h>#include <unistd.h>#include <string.h>#include <signal.h>#include "sys9.h"#include "dir.h" /* * Called before main to initialize environ. * Some plan9 environment variables * have 0 bytes in them (notably $path); * we change them to 1's (and execve changes back) * * Also, register the note handler. */ char **environ;int errno;unsigned long _clock;static char name[NAME_MAX+5] = "#e";static void fdsetup(char *, char *);static void sigsetup(char *, char *); enum { Envhunk=7000,}; void_envsetup(void){ int dfd; struct dirent *de; int n, nd, m, i, j, f; int psize, cnt; int nohandle; int fdinited; char *ps, *p; char **pp; Dir *d9, *d9a; nohandle = 0; fdinited = 0; cnt = 0; dfd = _OPEN(name, 0); if(dfd < 0) { static char **emptyenvp = 0; environ = emptyenvp; return; } name[2] = '/'; ps = p = malloc(Envhunk); psize = Envhunk; nd = _dirreadall(dfd, &d9a); _CLOSE(dfd); for(j=0; j<nd; j++){ d9 = &d9a[j]; n = strlen(d9->name); m = d9->length; i = p - ps; if(i+n+1+m+1 > psize) { psize += (n+m+2 < Envhunk)? Envhunk : n+m+2; ps = realloc(ps, psize); p = ps + i; } memcpy(p, d9->name, n); p[n] = '='; strcpy(name+3, d9->name); f = _OPEN(name, O_RDONLY); if(f < 0 || _READ(f, p+n+1, m) != m) m = 0; _CLOSE(f); if(p[n+m] == 0) m--; for(i=0; i<m; i++) if(p[n+1+i] == 0) p[n+1+i] = 1; p[n+1+m] = 0; if(strcmp(d9->name, "_fdinfo") == 0) { _fdinit(p+n+1, p+n+1+m); fdinited = 1; } else if(strcmp(d9->name, "_sighdlr") == 0) sigsetup(p+n+1, p+n+1+m); else if(strcmp(d9->name, "nohandle") == 0) nohandle = 1; p += n+m+2; cnt++; } free(d9a); if(!fdinited) _fdinit(0, 0); environ = pp = malloc((1+cnt)*sizeof(char *)); p = ps; for(i = 0; i < cnt; i++) { *pp++ = p; p = memchr(p, 0, ps+psize-p); if (!p) break; p++; } *pp = 0; if(!nohandle) _NOTIFY(_notehandler);} static voidsigsetup(char *s, char *se){ int i, sig; char *e; while(s < se){ sig = strtoul(s, &e, 10); if(s == e) break; s = e; if(sig <= MAXSIG) _sighdlr[sig] = SIG_IGN; }}
#include "lib.h"
#include <stdlib.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include "sys9.h"
#include "dir.h"
/*
* Called before main to initialize environ.
* Some plan9 environment variables
* have 0 bytes in them (notably $path);
* we change them to 1's (and execve changes back)
*
* Also, register the note handler.
*/
char **environ;
int errno;
unsigned long _clock;
static char name[NAME_MAX+5] = "#e";
static void fdsetup(char *, char *);
static void sigsetup(char *, char *);
enum {
Envhunk=7000,
};
void
_envsetup(void)
{
int dfd;
struct dirent *de;
int n, nd, m, i, j, f;
int psize, cnt;
int nohandle;
int fdinited;
char *ps, *p;
char **pp;
Dir *d9, *d9a;
nohandle = 0;
fdinited = 0;
cnt = 0;
dfd = _OPEN(name, 0);
if(dfd < 0) {
static char **emptyenvp = 0;
environ = emptyenvp;
return;
}
name[2] = '/';
ps = p = malloc(Envhunk);
psize = Envhunk;
nd = _dirreadall(dfd, &d9a);
_CLOSE(dfd);
for(j=0; j<nd; j++){
d9 = &d9a[j];
n = strlen(d9->name);
m = d9->length;
i = p - ps;
if(i+n+1+m+1 > psize) {
psize += (n+m+2 < Envhunk)? Envhunk : n+m+2;
ps = realloc(ps, psize);
p = ps + i;
}
memcpy(p, d9->name, n);
p[n] = '=';
strcpy(name+3, d9->name);
f = _OPEN(name, O_RDONLY);
if(f < 0 || _READ(f, p+n+1, m) != m)
m = 0;
_CLOSE(f);
if(p[n+m] == 0)
m--;
for(i=0; i<m; i++)
if(p[n+1+i] == 0)
p[n+1+i] = 1;
p[n+1+m] = 0;
if(strcmp(d9->name, "_fdinfo") == 0) {
_fdinit(p+n+1, p+n+1+m);
fdinited = 1;
} else if(strcmp(d9->name, "_sighdlr") == 0)
sigsetup(p+n+1, p+n+1+m);
else if(strcmp(d9->name, "nohandle") == 0)
nohandle = 1;
p += n+m+2;
cnt++;
}
free(d9a);
if(!fdinited)
_fdinit(0, 0);
environ = pp = malloc((1+cnt)*sizeof(char *));
p = ps;
for(i = 0; i < cnt; i++) {
*pp++ = p;
p = memchr(p, 0, ps+psize-p);
if (!p)
break;
p++;
}
*pp = 0;
if(!nohandle)
_NOTIFY(_notehandler);
}
static void
sigsetup(char *s, char *se)
{
int i, sig;
char *e;
while(s < se){
sig = strtoul(s, &e, 10);
if(s == e)
break;
s = e;
if(sig <= MAXSIG)
_sighdlr[sig] = SIG_IGN;
}
}