Hi,
I'm trying to compile the attached file, but getting problems with mmap.
I've read about problems using mmap. Is there a workaround.
Using mmap.exe I#m getting
mkdep: mmap: No such device or address
0 [main] mkdep 351 open_stackdumpfile: Dumping stack trace to
mkdep.exe.stackdump
Ronald
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/fcntl.h>
#include <sys/mman.h>
char *filename, *command, __depname[256] = "\n\t@touch ";
int needsconfig, hasconfig, hasdep;
#define depname (__depname+9)
struct path_struct {
int len;
char buffer[256-sizeof(int)];
} path_array[2] = {
{ 23, "/usr/src/linux/include/" },
{ 0, "" }
};
static void handle_include(int type, char *name, int len)
{
int plen;
struct path_struct *path = path_array+type;
if (len == 14 && !memcmp(name, "linux/config.h", len))
hasconfig = 1;
plen = path->len;
memcpy(path->buffer+plen, name, len);
len += plen;
path->buffer[len] = '\0';
if (access(path->buffer, F_OK))
return;
if (!hasdep) {
hasdep = 1;
printf("%s:", depname);
}
printf(" \\\n %s", path->buffer);
}
static void handle_config(void)
{
needsconfig = 1;
if (!hasconfig)
fprintf(stderr,
"%s needs config but has not included config file\n",
filename);
}
#if defined(__alpha__) || defined(__i386__)
#define LE_MACHINE
#endif
#ifdef LE_MACHINE
#define next_byte(x) (x >>= 8)
#define current ((unsigned char) __buf)
#else
#define next_byte(x) (x <<= 8)
#define current (__buf >> 8*(sizeof(unsigned long)-1))
#endif
#define GETNEXT { \
next_byte(__buf); \
if (!__nrbuf) { \
__buf = *(unsigned long *) next; \
__nrbuf = sizeof(unsigned long); \
if (!__buf) \
break; \
} next++; __nrbuf--; }
#define CASE(c,label) if (current == c) goto label
#define NOTCASE(c,label) if (current != c) goto label
static void state_machine(register char *next)
{
for(;;) {
register unsigned long __buf = 0;
register unsigned long __nrbuf = 0;
normal:
GETNEXT
__normal:
CASE('/',slash);
CASE('"',string);
CASE('\'',char_const);
CASE('#',preproc);
goto normal;
slash:
GETNEXT
CASE('*',comment);
goto __normal;
string:
GETNEXT
CASE('"',normal);
NOTCASE('\\',string);
GETNEXT
goto string;
char_const:
GETNEXT
CASE('\'',normal);
NOTCASE('\\',char_const);
GETNEXT
goto char_const;
comment:
GETNEXT
__comment:
NOTCASE('*',comment);
GETNEXT
CASE('/',normal);
goto __comment;
preproc:
GETNEXT
CASE('\n',normal);
CASE(' ',preproc);
CASE('\t',preproc);
CASE('i',i_preproc);
GETNEXT
skippreproc:
CASE('\n',normal);
CASE('\\',skippreprocslash);
GETNEXT
goto skippreproc;
skippreprocslash:
GETNEXT;
GETNEXT;
goto skippreproc;
i_preproc:
GETNEXT
CASE('f',if_line);
NOTCASE('n',skippreproc);
GETNEXT
NOTCASE('c',skippreproc);
GETNEXT
NOTCASE('l',skippreproc);
GETNEXT
NOTCASE('u',skippreproc);
GETNEXT
NOTCASE('d',skippreproc);
GETNEXT
NOTCASE('e',skippreproc);
/* "# include" found */
include_line:
GETNEXT
CASE('\n',normal);
CASE('<', std_include_file);
NOTCASE('"', include_line);
/* "local" include file */
{
char *incname = next;
local_include_name:
GETNEXT
CASE('\n',normal);
NOTCASE('"', local_include_name);
handle_include(1, incname, next-incname-1);
goto skippreproc;
}
/* <std> include file */
std_include_file:
{
char *incname = next;
std_include_name:
GETNEXT
CASE('\n',normal);
NOTCASE('>', std_include_name);
handle_include(0, incname, next-incname-1);
goto skippreproc;
}
if_line:
if (needsconfig)
goto skippreproc;
if_start:
GETNEXT
CASE('C', config);
CASE('\n', normal);
CASE('_', if_middle);
if (current >= 'a' && current <= 'z')
goto if_middle;
if (current < 'A' || current > 'Z')
goto if_start;
config:
GETNEXT
NOTCASE('O', __if_middle);
GETNEXT
NOTCASE('N', __if_middle);
GETNEXT
NOTCASE('F', __if_middle);
GETNEXT
NOTCASE('I', __if_middle);
GETNEXT
NOTCASE('G', __if_middle);
GETNEXT
NOTCASE('_', __if_middle);
handle_config();
goto skippreproc;
if_middle:
GETNEXT
__if_middle:
CASE('\n', normal);
CASE('_', if_middle);
if (current >= 'a' && current <= 'z')
goto if_middle;
if (current < 'A' || current > 'Z')
goto if_start;
goto if_middle;
}
}
static void do_depend(void)
{
char *map;
int mapsize;
int pagesizem1 = getpagesize()-1;
int fd = open(filename, O_RDONLY);
struct stat st;
if (fd < 0) {
perror("mkdep: open");
return;
}
fstat(fd, &st);
mapsize = st.st_size + 2*sizeof(unsigned long);
mapsize = (mapsize+pagesizem1) & ~pagesizem1;
map = mmap(NULL, mapsize, PROT_READ, MAP_PRIVATE, fd, 0);
if (-1 == (long)map) {
perror("mkdep: mmap");
close(fd);
return;
}
close(fd);
state_machine(map);
munmap(map, mapsize);
if (hasdep)
puts(command);
}
int main(int argc, char **argv)
{
int len;
char * hpath;
hpath = getenv("HPATH");
if (!hpath)
hpath = "/usr/src/linux/include";
len = strlen(hpath);
memcpy(path_array[0].buffer, hpath, len);
if (len && hpath[len-1] != '/') {
path_array[0].buffer[len] = '/';
len++;
}
path_array[0].buffer[len] = '\0';
path_array[0].len = len;
while (--argc > 0) {
int len;
char *name = *++argv;
filename = name;
len = strlen(name);
memcpy(depname, name, len+1);
command = __depname;
if (len > 2 && name[len-2] == '.') {
switch (name[len-1]) {
case 'c':
case 'S':
depname[len-1] = 'o';
command = "";
}
}
needsconfig = hasconfig = hasdep = 0;
do_depend();
if (hasconfig && !needsconfig)
fprintf(stderr, "%s doesn't need config\n", filename);
}
return 0;
}
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