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/* List the currently loaded modules.
Copyright 1996, 1997 Linux International.
New implementation contributed by Richard Henderson <rth@tamu.edu>
Based on original work by Bjorn Eckwall <bj0rn@blox.se>
This file is part of the Linux modutils.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ident "$Id: lsmod.c,v 1.1 1997/09/10 22:14:48 rth Exp $"
#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include "module.h"
#include "util.h"
#include "logger.h"
/*======================================================================*/
/* If we don't have query_module ... */
static int
old_lsmod(void)
{
int fd, len, bufsize;
char *buffer;
/* We've got no other option but to read /proc. */
if ((fd = open("/proc/modules", O_RDONLY)) < 0)
{
error("/proc/modules: %m");
return 1;
}
buffer = xmalloc(bufsize = 8*1024);
retry_read:
len = read(fd, buffer, bufsize);
if (len < 0)
{
error("/proc/modules: %m");
return 1;
}
else if (len == sizeof(buffer))
{
lseek(fd, 0, SEEK_SET);
buffer = xrealloc(buffer, bufsize *= 2);
goto retry_read;
}
close(fd);
/* Write it out. */
puts("Module Pages Used by");
write(1, buffer, len);
return 0;
}
/* If we do have query_module ... */
static int
new_lsmod(void)
{
char *module_names, *m, *refs;
size_t bufsize, ret, nmod, i;
/* A header. */
puts("Module Size Used by");
/* Fetch the list of modules. */
module_names = xmalloc(bufsize = 1024);
retry_mod_load:
if (query_module(NULL, QM_MODULES, module_names, bufsize, &ret))
{
if (errno == ENOSPC)
{
module_names = xrealloc(module_names, bufsize = ret);
goto retry_mod_load;
}
error("QM_MODULES: %m");
return 1;
}
nmod = ret;
refs = xmalloc(bufsize = 1024);
for (i = 0, m = module_names; i < nmod; ++i, m += strlen(m)+1)
{
struct new_module_info info;
size_t j;
char *r;
if (query_module(m, QM_INFO, &info, sizeof(info), &ret))
{
error("QM_INFO: %m");
return 1;
}
printf("%-20s%8lu%4ld ", m, info.size, info.usecount);
if (info.flags & NEW_MOD_DELETED)
fputs(" (deleted)", stdout);
else if (!(info.flags & NEW_MOD_RUNNING))
fputs(" (uninitialized)", stdout);
else
{
if (info.flags & NEW_MOD_AUTOCLEAN)
fputs(" (autoclean)", stdout);
if (!(info.flags & NEW_MOD_USED_ONCE))
fputs(" (unused)", stdout);
}
retry_ref_load:
if (query_module(m, QM_REFS, refs, bufsize, &ret))
{
if (errno == ENOSPC)
{
refs = xrealloc(refs, bufsize = ret);
goto retry_ref_load;
}
error("QM_REFS: %m");
return 1;
}
if (ret > 0)
{
putchar(' ');
putchar('[');
j = 0, r = refs;
fputs(r, stdout);
while (r += strlen(r)+1, ++j < ret)
{
putchar(' ');
fputs(r, stdout);
}
putchar(']');
}
putchar('\n');
}
return 0;
}
int
main(int argc, char **argv)
{
error_file = "lsmod";
if (query_module(NULL, 0, NULL, 0, NULL) == 0)
return new_lsmod();
else
return old_lsmod();
}
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