+#include <string.h>
#include <sys/stat.h>
#include <sys/dirent.h>
#include <sys/types.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
+#include <signal.h>
+#include <sys/sysctl.h>
+#include <sys/utsname.h>
+#include <paths.h>
+#include <ctype.h>
+#include <pwd.h>
+#include <grp.h>
+#include <stdarg.h>
+
+#include <nestedvm/socket.h>
int _syscall_set_errno(struct _reent *ptr, int err) {
ptr->_errno = -err;
return -1;
}
-extern int _stat_r(struct _reent *, const char *, struct stat *);
-int _access_r(struct _reent *ptr, const char *pathname, int mode) {
- struct stat statbuf;
- if(_stat_r(ptr,pathname,&statbuf) < 0) return -1;
- return 0;
-}
-
-/* NestedVM doesn't, and probably never will, support this security related stuff */
-uid_t getuid() { return 0; }
-gid_t getgid() { return 0; }
-uid_t geteuid() { return 0; }
-gid_t getegid() { return 0; }
-int getgroups(int gidsetlen, gid_t *gidset) {
- if(gidsetlen) *gidset = 0;
- return 1;
-}
-mode_t umask(mode_t new) { return 0022; }
-int _chmod_r(struct _reent *ptr, const char *f, mode_t mode) { return 0; }
-int _fchmod_r(struct _reent *ptr, int fd, mode_t mode) { return 0; }
-int _chown_r(struct _reent *ptr, const char *f, uid_t uid, gid_t gid) { return 0; }
-int _fchown_r(struct _reent *ptr, int fd, uid_t uid, gid_t gid) { return 0; }
+#define REENT_WRAPPER0R(f,rt) \
+ extern rt _##f##_r(struct _reent *ptr); \
+ rt f() { return _##f##_r(_REENT); }
+#define REENT_WRAPPER0(f) REENT_WRAPPER0R(f,int)
#define REENT_WRAPPER1R(f,rt,t1) \
extern rt _##f##_r(struct _reent *ptr, t1 a); \
rt f(t1 a, t2 b, t3 c, t4 d) { return _##f##_r(_REENT,a,b,c,d); }
#define REENT_WRAPPER4(f,t1,t2,t3,t4) REENT_WRAPPER4R(f,int,t1,t2,t3,t4)
+#define REENT_WRAPPER5R(f,rt,t1,t2,t3,t4,t5) \
+extern rt _##f##_r(struct _reent *ptr, t1 a, t2 b, t3 c, t4 d, t5 e); \
+rt f(t1 a, t2 b, t3 c, t4 d, t5 e) { return _##f##_r(_REENT,a,b,c,d,e); }
+#define REENT_WRAPPER5(f,t1,t2,t3,t4,t5) REENT_WRAPPER5R(f,int,t1,t2,t3,t4,t5)
+
+#define REENT_WRAPPER6R(f,rt,t1,t2,t3,t4,t5,t6) \
+extern rt _##f##_r(struct _reent *ptr, t1 a, t2 b, t3 c, t4 d, t5 e, t6 f); \
+rt f(t1 a, t2 b, t3 c, t4 d, t5 e, t6 f) { return _##f##_r(_REENT,a,b,c,d,e,f); }
+#define REENT_WRAPPER6(f,t1,t2,t3,t4,t5,t6) REENT_WRAPPER6R(f,int,t1,t2,t3,t4,t5,t6)
+
REENT_WRAPPER2(mkdir,const char *,mode_t)
REENT_WRAPPER2(access,const char *,int)
REENT_WRAPPER1(rmdir,const char *)
REENT_WRAPPER3(readlink,const char *, char *,int)
REENT_WRAPPER3(chown,const char *,uid_t,gid_t)
REENT_WRAPPER3(fchown,int,uid_t,gid_t)
+REENT_WRAPPER3(lchown,const char *,uid_t,gid_t)
REENT_WRAPPER2(chmod,const char *,mode_t)
REENT_WRAPPER2(fchmod,int,mode_t)
REENT_WRAPPER2(lstat,const char *,struct stat *)
REENT_WRAPPER4(getdents,int, char *, size_t,long *)
REENT_WRAPPER1(dup,int)
REENT_WRAPPER2R(pathconf,long,const char *,int)
+REENT_WRAPPER0(vfork)
+REENT_WRAPPER1(chroot,const char *)
+REENT_WRAPPER3(mknod,const char *,mode_t,dev_t)
+REENT_WRAPPER2(ftruncate,int,off_t)
+REENT_WRAPPER1(usleep,unsigned int)
+REENT_WRAPPER2(mkfifo,const char *, mode_t)
+REENT_WRAPPER3(klogctl,int,char*,int)
+REENT_WRAPPER2R(realpath,char *,const char *,char *)
+REENT_WRAPPER6(_sysctl,int *,int, void *, size_t*, void *, size_t)
+REENT_WRAPPER6(sysctl,int *, int, void *, size_t*, void *, size_t)
+REENT_WRAPPER2(getpriority,int,int)
+REENT_WRAPPER3(setpriority,int,int,int)
+REENT_WRAPPER3(connect,int,const struct sockaddr *,socklen_t)
+REENT_WRAPPER3(socket,int,int,int)
+REENT_WRAPPER3(_resolve_hostname,const char *,char*,size_t*)
+REENT_WRAPPER3(_resolve_ip,int,char*,size_t)
+REENT_WRAPPER3(accept,int,struct sockaddr *,socklen_t*)
+REENT_WRAPPER5(getsockopt,int,int,int,void*,socklen_t*)
+REENT_WRAPPER5(setsockopt,int,int,int,const void*,socklen_t)
+REENT_WRAPPER3(bind,int,const struct sockaddr *,socklen_t)
+REENT_WRAPPER2(listen,int,int)
+REENT_WRAPPER2(shutdown,int,int)
+REENT_WRAPPER6(sendto,int,const void*,size_t,int,const struct sockaddr*,socklen_t)
+REENT_WRAPPER6(recvfrom,int,void*,size_t,int,struct sockaddr*,socklen_t*)
+REENT_WRAPPER5(select,int,fd_set*,fd_set*,fd_set*,struct timeval*)
+REENT_WRAPPER4(send,int,const void*,size_t,int)
+REENT_WRAPPER4(recv,int,void*,size_t,int)
+REENT_WRAPPER2(getgroups,int,gid_t*)
+REENT_WRAPPER3(getsockname,int,struct sockaddr*,int*)
+REENT_WRAPPER3(getpeername,int,struct sockaddr*,int*)
+REENT_WRAPPER1(setuid,uid_t)
+REENT_WRAPPER1(seteuid,uid_t)
+REENT_WRAPPER1(setgid,gid_t)
+REENT_WRAPPER1(setegid,gid_t)
+REENT_WRAPPER2(setgroups,int,const gid_t *)
+REENT_WRAPPER0R(setsid,pid_t)
+REENT_WRAPPER1(fsync,int)
extern int __execve_r(struct _reent *ptr, const char *path, char *const argv[], char *const envp[]);
int _execve(const char *path, char *const argv[], char *const envp[]) {
}
}
+int _sysctl_r(struct _reent *ptr, int *name, int namelen, void *oldp, size_t *oldlen, void *newp, size_t newlen) {
+ if(name[0] != CTL_USER) return _sysctl(name,namelen,oldp,oldlen,newp,newlen);
+ if(newp != NULL) { ptr->_errno = EPERM; return -1; }
+ if(namelen != 2) { ptr->_errno = EINVAL; return -1; }
+
+ switch(name[1]) {
+ default:
+ fprintf(stderr,"WARNING: sysctl: Unknown name: %d\n",name[1]);
+ ptr->_errno = EINVAL;
+ return -1;
+ }
+}
+
+void sync() {
+ /* do nothing*/
+}
+
+char *ttyname(int fd) {
+ return isatty(fd) ? "/dev/console" : NULL;
+}
+
+int sigaction(int sig, const struct sigaction *act, struct sigaction *oact) {
+ _sig_func_ptr old;
+ _sig_func_ptr new;
+ if(act) {
+ if(act->sa_flags || act->sa_mask != ~((sigset_t)0)) { errno = EINVAL; return -1; }
+ old = signal(sig,act->sa_handler);
+ } else if(oact) {
+ old = signal(sig,SIG_DFL);
+ signal(sig,old);
+ }
+ if(oact) {
+ oact->sa_handler = old;
+ oact->sa_mask = 0;
+ oact->sa_mask = ~((sigset_t)0);
+ }
+ return 0;
+}
+
DIR *opendir(const char *path) {
struct stat sb;
int fd;
free(dir);
return close(fd);
}
+
+/*
+ * Networking/Socket stuff
+ */
+
+/* This should really be part of the newlib _reent structure */
+int h_errno;
+
+char *inet_ntoa(struct in_addr in) {
+ static char buf[18];
+ const unsigned char *p = (void*) ∈
+ snprintf(buf,sizeof(buf),"%u.%u.%u.%u",p[0],p[1],p[2],p[3]);
+ return buf;
+}
+
+struct servent *getservbyname(const char *name,const char *proto) {
+ return NULL;
+}
+
+static const char *h_errlist[] = { "No Error","Unknown host", "Host name lookup failure","Unknown server error","No address associated with name" };
+
+const char *hstrerror(int err) {
+ if(err < 0 || err > 4) return "Unknown Error";
+ return h_errlist[err];
+}
+
+void herror(const char *string) {
+ fprintf(stderr,"%s: %s\n",string,hstrerror(h_errno));
+}
+
+extern int _resolve_ip(int addr, char *buf, size_t size);
+
+struct hostent *gethostbyaddr(const char *addr, int len, int type) {
+ static struct hostent hostent;
+ static char name[128];
+ static char *aliases[1];
+ static char *addr_list[1];
+ static char addr_list_buf[4];
+ int err,i;
+
+ if(type != AF_INET || len != 4) return NULL;
+ memcpy(&i,addr,4);
+ memcpy(addr_list_buf,addr,4);
+ err = _resolve_ip(i,name,sizeof(name));
+ if(err != 0) { h_errno = err; return NULL; }
+
+ hostent.h_name = name;
+ hostent.h_aliases = aliases;
+ aliases[0] = NULL;
+ hostent.h_addrtype = AF_INET;
+ hostent.h_length = sizeof(struct in_addr);
+ hostent.h_addr_list = addr_list;
+ addr_list[0] = addr_list_buf;
+
+ return &hostent;
+}
+
+extern int _resolve_hostname(const char *, char *buf, size_t *size);
+
+struct hostent *gethostbyname(const char *hostname) {
+#define MAX_ADDRS 256
+ static struct hostent hostent;
+ static char saved_hostname[128];
+ static char *addr_list[MAX_ADDRS+1];
+ static char addr_list_buf[MAX_ADDRS*sizeof(struct in_addr)];
+ static char *aliases[1];
+
+ unsigned char buf[MAX_ADDRS*sizeof(struct in_addr)];
+ size_t size = sizeof(buf);
+ int err,i,n=0;
+
+ err = _resolve_hostname(hostname,buf,&size);
+ if(err != 0) { h_errno = err; return NULL; }
+
+ memcpy(addr_list_buf,buf,size);
+ for(i=0;i<size;i += sizeof(struct in_addr)) addr_list[n++] = &addr_list_buf[i];
+ addr_list[n] = NULL;
+ strncpy(saved_hostname,hostname,sizeof(saved_hostname));
+ aliases[0] = NULL;
+
+ hostent.h_name = saved_hostname;
+ hostent.h_aliases = aliases;
+ hostent.h_addrtype = AF_INET;
+ hostent.h_length = sizeof(struct in_addr);
+ hostent.h_addr_list = addr_list;
+
+ return &hostent;
+}
+
+static struct passwd pw_passwd;
+static struct group gr_group;
+static FILE *passwd_fp;
+static FILE *group_fp;
+static char pw_name[1024];
+static char pw_password[1024];
+static char pw_gecos[1024];
+static char pw_dir[1024];
+static char pw_shell[1024];
+static char gr_name[1024];
+static char gr_passwd[1024];
+static char *gr_mem[1];
+
+static int gr_parse_body(const char *buf) {
+ if(sscanf(buf,"%[^:]:%[^:]:%hu",gr_name,gr_passwd,&gr_group.gr_gid) < 3) return -1;
+ gr_group.gr_name = gr_name;
+ gr_group.gr_passwd = gr_passwd;
+ gr_group.gr_mem = gr_mem;
+ gr_mem[0] = NULL;
+ return 0;
+}
+
+static int pw_parse_body(const char *buf) {
+ int pos;
+ if(sscanf(buf,"%[^:]:%[^:]:%d:%d:%[^:]:%[^:]:%s\n",pw_name,pw_password,&pw_passwd.pw_uid,&pw_passwd.pw_gid,pw_gecos,pw_dir,pw_shell) < 7) return -1;
+ pw_passwd.pw_name = pw_name;
+ pw_passwd.pw_passwd = pw_password;
+ pw_passwd.pw_gecos = pw_gecos;
+ pw_passwd.pw_dir = pw_dir;
+ pw_passwd.pw_shell = pw_shell;
+ pw_passwd.pw_comment = "";
+ return 0;
+}
+
+struct group *getgrnam(const char *name) {
+ FILE *fp;
+ char buf[1024];
+
+ if((fp=fopen("/etc/group","r"))==NULL) return NULL;
+ while(fgets(buf,sizeof(buf),fp)) {
+ if(buf[0] == '#') continue;
+ if(gr_parse_body(buf) < 0) {
+ fclose(fp);
+ return NULL;
+ }
+ if(strcmp(name,gr_name)==0) {
+ fclose(fp);
+ return &gr_group;
+ }
+ }
+ fclose(fp);
+ return NULL;
+}
+
+struct group *getgrgid(gid_t gid) {
+ FILE *fp;
+ char buf[1024];
+
+ if((fp=fopen("/etc/group","r"))==NULL) return NULL;
+ while(fgets(buf,sizeof(buf),fp)) {
+ if(buf[0] == '#') continue;
+ if(gr_parse_body(buf) < 0) {
+ fclose(fp);
+ return NULL;
+ }
+ if(gid == gr_group.gr_gid) {
+ fclose(fp);
+ return &gr_group;
+ }
+ }
+ fclose(fp);
+ return NULL;
+}
+
+struct group *getgrent() {
+ char buf[1024];
+ if(group_fp == NULL) return NULL;
+ if(fgets(buf,sizeof(buf),group_fp) == NULL) return NULL;
+ if(buf[0] == '#') return getgrent();
+ if(gr_parse_body(buf) < 0) return NULL;
+ return &gr_group;
+}
+
+void setgrent() {
+ if(group_fp != NULL) fclose(group_fp);
+ group_fp = fopen("/etc/group","r");
+}
+
+void endgrent() {
+ if(group_fp != NULL) fclose(group_fp);
+ group_fp = NULL;
+}
+
+struct passwd *getpwnam(const char *name) {
+ FILE *fp;
+ char buf[1024];
+
+ if((fp=fopen("/etc/passwd","r"))==NULL) return NULL;
+ while(fgets(buf,sizeof(buf),fp)) {
+ if(buf[0] == '#') continue;
+ if(pw_parse_body(buf) < 0) {
+ fclose(fp);
+ return NULL;
+ }
+ if(strcmp(name,pw_name)==0) {
+ fclose(fp);
+ return &pw_passwd;
+ }
+ }
+ fclose(fp);
+ return NULL;
+}
+
+struct passwd *getpwuid(uid_t uid) {
+ FILE *fp;
+ char buf[1024];
+
+ if((fp=fopen("/etc/passwd","r"))==NULL) return NULL;
+ while(fgets(buf,sizeof(buf),fp)) {
+ if(buf[0] == '#') continue;
+ if(pw_parse_body(buf) < 0) {
+ fclose(fp);
+ return NULL;
+ }
+ if(uid == pw_passwd.pw_uid) {
+ fclose(fp);
+ return &pw_passwd;
+ }
+ }
+ fclose(fp);
+ return NULL;
+}
+
+struct passwd *getpwent() {
+ char buf[1024];
+ if(passwd_fp == NULL) return NULL;
+ if(fgets(buf,sizeof(buf),passwd_fp) == NULL) return NULL;
+ if(buf[0] == '#') return getpwent();
+ if(pw_parse_body(buf) < 0) return NULL;
+ return &pw_passwd;
+}
+
+void setpwent() {
+ if(passwd_fp != NULL) fclose(passwd_fp);
+ passwd_fp = fopen("/etc/group","r");
+}
+
+void endpwent() {
+ if(passwd_fp != NULL) fclose(passwd_fp);
+ passwd_fp = NULL;
+}
+
+char *getpass(const char *prompt) {
+ static char buf[1024];
+ int len = 0;
+ fputs(prompt,stderr);
+ fflush(stdout);
+ if(fgets(buf,sizeof(buf),stdin)!=NULL) {
+ len = strlen(buf);
+ if(buf[len-1] == '\n') len--;
+ }
+ fputc('\n',stderr);
+ buf[len] = '\0';
+ return buf;
+}
+
+/* Argh... newlib's asprintf is totally broken... */
+int vasprintf(char **ret, const char *fmt, va_list ap) {
+ int n;
+ char *p;
+ *ret = malloc(128); /* just guess for now */
+ if(!*ret) return -1;
+ n = vsnprintf(*ret,128,fmt,ap);
+ if(n < 128) {
+ return n;
+ } else {
+ p = realloc(*ret,n+1);
+ if(!p) { free(*ret); return -1; }
+ return vsprintf(*ret = p,fmt,ap);
+ }
+}
+
+// FIXME: This needs to be in a header
+char *getlogin() {
+ return getenv("USER");
+}
+
+
+/*
+ * Other People's Code
+ */
+
+/* FreeBSD's dirname/basename */
+
+/* FIXME: Put these in a header */
+
+/*
+ * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+char *
+dirname(path)
+const char *path;
+{
+ static char bname[MAXPATHLEN];
+ register const char *endp;
+
+ /* Empty or NULL string gets treated as "." */
+ if (path == NULL || *path == '\0') {
+ (void)strcpy(bname, ".");
+ return(bname);
+ }
+
+ /* Strip trailing slashes */
+ endp = path + strlen(path) - 1;
+ while (endp > path && *endp == '/')
+ endp--;
+
+ /* Find the start of the dir */
+ while (endp > path && *endp != '/')
+ endp--;
+
+ /* Either the dir is "/" or there are no slashes */
+ if (endp == path) {
+ (void)strcpy(bname, *endp == '/' ? "/" : ".");
+ return(bname);
+ } else {
+ do {
+ endp--;
+ } while (endp > path && *endp == '/');
+ }
+
+ if (endp - path + 2 > sizeof(bname)) {
+ errno = ENAMETOOLONG;
+ return(NULL);
+ }
+ (void)strncpy(bname, path, endp - path + 1);
+ bname[endp - path + 1] = '\0';
+ return(bname);
+}
+
+char *
+basename(path)
+const char *path;
+{
+ static char bname[MAXPATHLEN];
+ register const char *endp, *startp;
+
+ /* Empty or NULL string gets treated as "." */
+ if (path == NULL || *path == '\0') {
+ (void)strcpy(bname, ".");
+ return(bname);
+ }
+
+ /* Strip trailing slashes */
+ endp = path + strlen(path) - 1;
+ while (endp > path && *endp == '/')
+ endp--;
+
+ /* All slashes becomes "/" */
+ if (endp == path && *endp == '/') {
+ (void)strcpy(bname, "/");
+ return(bname);
+ }
+
+ /* Find the start of the base */
+ startp = endp;
+ while (startp > path && *(startp - 1) != '/')
+ startp--;
+
+ if (endp - startp + 2 > sizeof(bname)) {
+ errno = ENAMETOOLONG;
+ return(NULL);
+ }
+ (void)strncpy(bname, startp, endp - startp + 1);
+ bname[endp - startp + 1] = '\0';
+ return(bname);
+}
+
+/* FreeBSD's uname */
+int
+uname(name)
+struct utsname *name;
+{
+ int mib[2], rval;
+ size_t len;
+ char *p;
+ int oerrno;
+
+ rval = 0;
+
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_OSTYPE;
+ len = sizeof(name->sysname);
+ oerrno = errno;
+ if (sysctl(mib, 2, &name->sysname, &len, NULL, 0) == -1) {
+ if(errno == ENOMEM)
+ errno = oerrno;
+ else
+ rval = -1;
+ }
+ name->sysname[sizeof(name->sysname) - 1] = '\0';
+
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_HOSTNAME;
+ len = sizeof(name->nodename);
+ oerrno = errno;
+ if (sysctl(mib, 2, &name->nodename, &len, NULL, 0) == -1) {
+ if(errno == ENOMEM)
+ errno = oerrno;
+ else
+ rval = -1;
+ }
+ name->nodename[sizeof(name->nodename) - 1] = '\0';
+
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_OSRELEASE;
+ len = sizeof(name->release);
+ oerrno = errno;
+ if (sysctl(mib, 2, &name->release, &len, NULL, 0) == -1) {
+ if(errno == ENOMEM)
+ errno = oerrno;
+ else
+ rval = -1;
+ }
+ name->release[sizeof(name->release) - 1] = '\0';
+
+ /* The version may have newlines in it, turn them into spaces. */
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_VERSION;
+ len = sizeof(name->version);
+ oerrno = errno;
+ if (sysctl(mib, 2, &name->version, &len, NULL, 0) == -1) {
+ if (errno == ENOMEM)
+ errno = oerrno;
+ else
+ rval = -1;
+ }
+ name->version[sizeof(name->version) - 1] = '\0';
+ for (p = name->version; len--; ++p) {
+ if (*p == '\n' || *p == '\t') {
+ if (len > 1)
+ *p = ' ';
+ else
+ *p = '\0';
+ }
+ }
+
+ mib[0] = CTL_HW;
+ mib[1] = HW_MACHINE;
+ len = sizeof(name->machine);
+ oerrno = errno;
+ if (sysctl(mib, 2, &name->machine, &len, NULL, 0) == -1) {
+ if (errno == ENOMEM)
+ errno = oerrno;
+ else
+ rval = -1;
+ }
+ name->machine[sizeof(name->machine) - 1] = '\0';
+ return (rval);
+}
+
+/* FreeBSD's gethostname */
+int
+gethostname(name, namelen)
+char *name;
+int namelen;
+{
+ int mib[2];
+ size_t size;
+
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_HOSTNAME;
+ size = namelen;
+ if (sysctl(mib, 2, name, &size, NULL, 0) == -1)
+ return (-1);
+ return (0);
+}
+
+/* FreeBSD's daemon() - modified for nestedvm */
+int
+daemon(nochdir, noclose)
+int nochdir, noclose;
+{
+ int fd;
+
+ switch (fork()) {
+ case -1:
+ return (-1);
+ case 0:
+ break;
+ default:
+ _exit(0);
+ }
+
+ if (setsid() == -1)
+ return (-1);
+
+ if (!nochdir)
+ (void)chdir("/");
+
+ if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
+ (void)dup2(fd, STDIN_FILENO);
+ (void)dup2(fd, STDOUT_FILENO);
+ (void)dup2(fd, STDERR_FILENO);
+ if (fd > 2)
+ (void)close(fd);
+ }
+ return (0);
+}
+
+/* FreeBSD's inet_addr/inet_aton */
+
+/*
+* Check whether "cp" is a valid ASCII representation
+ * of an Internet address and convert to a binary address.
+ * Returns 1 if the address is valid, 0 if not.
+ * This replaces inet_addr, the return value from which
+ * cannot distinguish between failure and a local broadcast address.
+ */
+int
+inet_aton(cp, addr)
+register const char *cp;
+struct in_addr *addr;
+{
+ u_long parts[4];
+ in_addr_t val;
+ char *c;
+ char *endptr;
+ int gotend, n;
+
+ c = (char *)cp;
+ n = 0;
+ /*
+ * Run through the string, grabbing numbers until
+ * the end of the string, or some error
+ */
+ gotend = 0;
+ while (!gotend) {
+ errno = 0;
+ val = strtoul(c, &endptr, 0);
+
+ if (errno == ERANGE) /* Fail completely if it overflowed. */
+ return (0);
+
+ /*
+ * If the whole string is invalid, endptr will equal
+ * c.. this way we can make sure someone hasn't
+ * gone '.12' or something which would get past
+ * the next check.
+ */
+ if (endptr == c)
+ return (0);
+ parts[n] = val;
+ c = endptr;
+
+ /* Check the next character past the previous number's end */
+ switch (*c) {
+ case '.' :
+ /* Make sure we only do 3 dots .. */
+ if (n == 3) /* Whoops. Quit. */
+ return (0);
+ n++;
+ c++;
+ break;
+
+ case '\0':
+ gotend = 1;
+ break;
+
+ default:
+ if (isspace((unsigned char)*c)) {
+ gotend = 1;
+ break;
+ } else
+ return (0); /* Invalid character, so fail */
+ }
+
+ }
+
+ /*
+ * Concoct the address according to
+ * the number of parts specified.
+ */
+
+ switch (n) {
+ case 0: /* a -- 32 bits */
+ /*
+ * Nothing is necessary here. Overflow checking was
+ * already done in strtoul().
+ */
+ break;
+ case 1: /* a.b -- 8.24 bits */
+ if (val > 0xffffff || parts[0] > 0xff)
+ return (0);
+ val |= parts[0] << 24;
+ break;
+
+ case 2: /* a.b.c -- 8.8.16 bits */
+ if (val > 0xffff || parts[0] > 0xff || parts[1] > 0xff)
+ return (0);
+ val |= (parts[0] << 24) | (parts[1] << 16);
+ break;
+
+ case 3: /* a.b.c.d -- 8.8.8.8 bits */
+ if (val > 0xff || parts[0] > 0xff || parts[1] > 0xff ||
+ parts[2] > 0xff)
+ return (0);
+ val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
+ break;
+ }
+
+ if (addr != NULL)
+ addr->s_addr = htonl(val);
+ return (1);
+}
+
+/*
+ * ASCII internet address interpretation routine.
+ * The value returned is in network order.
+ */
+in_addr_t /* XXX should be struct in_addr :( */
+inet_addr(cp)
+register const char *cp;
+{
+ struct in_addr val;
+
+ if (inet_aton(cp, &val))
+ return (val.s_addr);
+ return (INADDR_NONE);
+}
+
+int
+getgrouplist(uname, agroup, groups, grpcnt)
+const char *uname;
+gid_t agroup;
+register gid_t *groups;
+int *grpcnt;
+{
+ register struct group *grp;
+ register int i, ngroups;
+ int ret, maxgroups;
+
+ ret = 0;
+ ngroups = 0;
+ maxgroups = *grpcnt;
+ /*
+ * When installing primary group, duplicate it;
+ * the first element of groups is the effective gid
+ * and will be overwritten when a setgid file is executed.
+ */
+ groups[ngroups++] = agroup;
+ if (maxgroups > 1)
+ groups[ngroups++] = agroup;
+ /*
+ * Scan the group file to find additional groups.
+ */
+ setgrent();
+ while ((grp = getgrent())) {
+ for (i = 0; i < ngroups; i++) {
+ if (grp->gr_gid == groups[i])
+ goto skip;
+ }
+ for (i = 0; grp->gr_mem[i]; i++) {
+ if (!strcmp(grp->gr_mem[i], uname)) {
+ if (ngroups >= maxgroups) {
+ ret = -1;
+ break;
+ }
+ groups[ngroups++] = grp->gr_gid;
+ break;
+ }
+ }
+skip: ;
+ }
+ endgrent();
+ *grpcnt = ngroups;
+ return (ret);
+}
+
+int
+initgroups(uname, agroup)
+const char *uname;
+gid_t agroup;
+{
+ gid_t groups[32], ngroups;
+
+ ngroups = 32;
+ getgrouplist(uname, agroup, groups, &ngroups);
+ return (setgroups(ngroups, groups));
+}
projects / nestedvm.git / blobdiff