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loader: Hide the preloader from the ps output.

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This commit is contained in:
Alexandre Julliard 2006-03-31 19:16:22 +02:00
parent bf463abfec
commit c20d6c4095
1 changed files with 29 additions and 0 deletions
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29
loader/preloader.c
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@ -287,6 +287,14 @@ static inline gid_t wld_getegid(void)
return ret;
}
static inline int wld_prctl( int code, int arg )
{
int ret;
__asm__ __volatile__( "pushl %%ebx; movl %2,%%ebx; int $0x80; popl %%ebx"
: "=a" (ret) : "0" (SYS_prctl), "r" (code), "c" (arg) );
return SYSCALL_RET(ret);
}
/* replacement for libc functions */
@ -871,6 +879,26 @@ static int is_in_preload_range( const ElfW(auxv_t) *av, int type )
return 0;
}
/* set the process name if supported */
static void set_process_name( int argc, char *argv[] )
{
unsigned int i, off;
char *p, *name, *end;
/* set the process short name */
for (p = name = argv[1]; *p; p++) if (p[0] == '/' && p[1]) name = p + 1;
if (wld_prctl( 15 /* PR_SET_NAME */, (int)name ) == -1) return;
/* find the end of the argv array and move everything down */
end = argv[argc - 1];
while (*end) end++;
off = argv[1] - argv[0];
for (p = argv[1]; p <= end; p++) *(p - off) = *p;
wld_memset( end - off, 0, off );
for (i = 1; i < argc; i++) argv[i] -= off;
}
/*
* wld_start
*
@ -956,6 +984,7 @@ void* wld_start( void **stack )
delete_av[i].a_type = AT_NULL;
/* get rid of first argument */
set_process_name( *pargc, argv );
pargc[1] = pargc[0] - 1;
*stack = pargc + 1;