rebootcmd.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 #include        "u.h"
    2 #include        "../port/lib.h"
    3 #include        "mem.h"
    4 #include        "dat.h"
    5 #include        "fns.h"
    6 #include        "../port/error.h"
    7 #include        "a.out.h"
    8 
    9 static ulong
   10 l2be(long l)
   11 {
   12         uchar *cp;
   13 
   14         cp = (uchar*)&l;
   15         return (cp[0]<<24) | (cp[1]<<16) | (cp[2]<<8) | cp[3];
   16 }
   17 
   18 
   19 static void
   20 readn(Chan *c, void *vp, long n)
   21 {
   22         char *p = vp;
   23         long nn;
   24 
   25         while(n > 0) {
   26                 nn = devtab[c->type]->read(c, p, n, c->offset);
   27                 if(nn == 0)
   28                         error(Eshort);
   29                 c->offset += nn;
   30                 p += nn;
   31                 n -= nn;
   32         }
   33 }
   34 
   35 static void
   36 setbootcmd(int argc, char *argv[])
   37 {
   38         char *buf, *p, *ep;
   39         int i;
   40 
   41         buf = malloc(1024);
   42         if(buf == nil)
   43                 error(Enomem);
   44         p = buf;
   45         ep = buf + 1024;
   46         for(i=0; i<argc; i++)
   47                 p = seprint(p, ep, "%q ", argv[i]);
   48         *p = 0;
   49         ksetenv("bootcmd", buf, 1);
   50         free(buf);
   51 }
   52 
   53 void
   54 rebootcmd(int argc, char *argv[])
   55 {
   56         Chan *c;
   57         Exec exec;
   58         ulong magic, text, rtext, entry, data, size;
   59         uchar *p;
   60 
   61         if(argc == 0)
   62                 exit(0);
   63 
   64         c = namec(argv[0], Aopen, OEXEC, 0);
   65         if(waserror()){
   66                 cclose(c);
   67                 nexterror();
   68         }
   69 
   70         readn(c, &exec, sizeof(Exec));
   71         magic = l2be(exec.magic);
   72         entry = l2be(exec.entry);
   73         text = l2be(exec.text);
   74         data = l2be(exec.data);
   75         if(magic != AOUT_MAGIC)
   76                 error(Ebadexec);
   77 
   78         /* round text out to page boundary */
   79         rtext = PGROUND(entry+text)-entry;
   80         size = rtext + data;
   81         p = malloc(size);
   82         if(p == nil)
   83                 error(Enomem);
   84 
   85         if(waserror()){
   86                 free(p);
   87                 nexterror();
   88         }
   89 
   90         memset(p, 0, size);
   91         readn(c, p, text);
   92         readn(c, p + rtext, data);
   93 
   94         ksetenv("bootfile", argv[0], 1);
   95         setbootcmd(argc-1, argv+1);
   96 
   97         reboot((void*)entry, p, size);
   98 
   99         panic("return from reboot!");
  100 }

Cache object: 56c25a8f630c4311eca81e82472faf4a

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/port/rebootcmd.c

FreeBSD/Linux Kernel Cross Reference
sys/port/rebootcmd.c