diff options
Diffstat (limited to 'os_cmd/Linux/ossvermagic/ossvermagic.c')
| -rw-r--r-- | os_cmd/Linux/ossvermagic/ossvermagic.c | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/os_cmd/Linux/ossvermagic/ossvermagic.c b/os_cmd/Linux/ossvermagic/ossvermagic.c new file mode 100644 index 0000000..7af4666 --- /dev/null +++ b/os_cmd/Linux/ossvermagic/ossvermagic.c @@ -0,0 +1,325 @@ +/* + * + * This file is part of Open Sound System. + * + * Copyright (C) 4Front Technologies 1996-2008. + * + * This this source file is released under GPL v2 license (no other versions). + * See the COPYING file included in the main directory of this source + * distribution for the license terms and conditions. + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <string.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <dirent.h> +#include <sys/utsname.h> +#include <sys/stat.h> +#include <elf.h> +#define CONFIGURE_C +#include "oss_config.h" + +int elf_verbose = 0; + +#ifdef __x86_64__ +#define ELF64 +#define ELF_LOAD_SYMTAB elf_load_symtab +#else +#define ELF32 +#define ELF_LOAD_SYMTAB elf_load_symtab +#endif +#include "../../../setup/elflib.inc" + +char *fname; +int ok; +int quiet = 0; +int verbose = 0; +int once = 0; +int exit_status = -1; +int check_compile_vermagic = 0; + +static void +sym_callback (char *buffer, int blen, Elf_Sym * sym, char *name, int addr) +{ + + char tmp[256], *vermagic = tmp; + + ok = 1; + exit_status = 0; + + if (verbose) + printf ("Vermagic buffer at %x\n", addr); + + elf_read_datasym (buffer, blen, sym, addr, tmp, sizeof (tmp)); + + if (strncmp (vermagic, "vermagic=", 9) == 0) + vermagic += 9; + + if (quiet) + printf ("%s\n", vermagic); + else + printf ("%s: '%s'\n", fname, vermagic); + + if (once) + exit (0); +} + +static void +find_vermagic (char *fname) +{ + ok = 0; + + if (verbose) + printf ("ELF scan %s\n", fname); + + ok = ELF_LOAD_SYMTAB (fname, "vermagic", sym_callback); + if (!ok) + ok = ELF_LOAD_SYMTAB (fname, "__mod_vermagic", sym_callback); + if (!ok) + ELF_LOAD_SYMTAB (fname, "__oss_compile_vermagic", sym_callback); +} + +static void +find_link_vermagic (char *fname) +{ + if (verbose) + printf ("ELF scan %s\n", fname); + + ELF_LOAD_SYMTAB (fname, "__oss_compile_vermagic", sym_callback); +} + +static void +check_gzipped_module (char *fname) +{ + char tmp[1024]; + + sprintf (tmp, "gunzip -c %s > /tmp/oss.tmpmodule", fname); + unlink ("/tmp/oss.tmpmodule"); + + if (system (tmp) != 0) + { + unlink ("/tmp/oss.tmpmodule"); + return; + } + + find_vermagic ("/tmp/oss.tmpmodule"); + unlink ("/tmp/oss.tmpmodule"); +} + +static void +check_bzipped_module (char *fname) +{ + char tmp[1024]; + + sprintf (tmp, "bunzip2 -c %s > /tmp/oss.tmpmodule", fname); + unlink ("/tmp/oss.tmpmodule"); + + if (system (tmp) != 0) + { + unlink ("/tmp/oss.tmpmodule"); + return; + } + + find_vermagic ("/tmp/oss.tmpmodule"); + unlink ("/tmp/oss.tmpmodule"); +} + +static void +scan_dir (char *dirname) +{ + char tmp[1024]; + DIR *dir; + struct dirent *de; + + if ((dir = opendir (dirname)) == NULL) + return; + + while ((de = readdir (dir))) + { + struct stat st; + + if (de->d_name[0] == '.') + continue; + + sprintf (tmp, "%s/%s", dirname, de->d_name); + + if (stat (tmp, &st) == -1) + { + perror (tmp); + return; + } + + if (S_ISDIR (st.st_mode)) + scan_dir (tmp); + else + { + char *p; + + if (verbose) + printf ("Checking %s\n", tmp); + p = tmp + strlen (tmp) - 3; // Seek the .gz suffix + if (strcmp (p, ".gz") == 0) + { + fname = tmp; + check_gzipped_module (tmp); + continue; + } + + p = tmp + strlen (tmp) - 4; // Seek the .bz2 suffix + if (strcmp (p, ".bz2") == 0) + { + fname = tmp; + check_bzipped_module (tmp); + continue; + } + + fname = tmp; + find_vermagic (tmp); + } + } + + closedir (dir); +} + +static void +find_system_vermagic (void) +{ + struct utsname un; + char dirname[1024]; + + struct stat st; + + if (uname (&un) == -1) + { + perror ("uname"); + exit (-1); + } + + sprintf (dirname, "/lib/modules/%s/kernel", un.release); + + if (stat (dirname, &st) == -1) + { + perror (dirname); + fprintf (stderr, "Kernel modules not available\n"); + exit (-1); + } + + quiet = 1; + once = 1; + scan_dir (dirname); +} + +int +main (int argc, char *argv[]) +{ + int i, ok; + int do_sys = 0; + int valid = 0; + + if (argc < 2) + exit (-1); + + for (i = 1; i < argc; i++) + { + if (strcmp (argv[i], "-r") == 0) + { + /* + * Check if the system is 2.6.20 or later which is + * always compiled with CONFIG_REGPARM. + */ + + struct utsname un; + int a, b, c; + + if (uname (&un) == -1) + { + perror ("uname"); + exit (-1); + } + + if (sscanf (un.release, "%d.%d.%d", &a, &b, &c) != 3) + { + fprintf (stderr, "Unrecognized kernel release '%s'\n", + un.release); + exit (0); /* Assume it's some future kernel */ + } + + if (a > 2) + exit (0); /* Always REGPARM */ + if (b > 6) + exit (0); /* Always REGPARM */ + if (c >= 20) + exit (0); /* Always REGPARM */ + + exit (1); /* Don't know */ + } + + if (strcmp (argv[i], "-s") == 0) + do_sys = 1; + if (strcmp (argv[i], "-v") == 0) + verbose++; + if (strcmp (argv[i], "-z") == 0) + valid = 1; + if (strcmp (argv[i], "-u") == 0) + check_compile_vermagic = 1; + } + + if (!valid) + { + fprintf (stderr, + "%s: This program is reserved for use by Open Sound System\n", + argv[0]); + exit (-1); + } + + elf_verbose = verbose; + + if (do_sys) + { + ok = 0; + if (fork () == 0) + find_system_vermagic (); + else + { + int status; + wait (&status); + unlink ("/tmp/oss.tmpmodule"); + exit (WEXITSTATUS (status)); + } + + if (!ok) + exit (-1); + exit (0); + } + + for (i = 1; i < argc; i++) + { + if (strcmp (argv[i], "-q") == 0) + { + quiet = 1; + continue; + } + + if (strcmp (argv[i], "-1") == 0) + { + once = 1; + continue; + } + + fname = argv[i]; + ok = 0; + + if (*fname != '-') + { + if (check_compile_vermagic == 0) find_vermagic (fname); + else find_link_vermagic (fname); + } + } + + exit (exit_status); +} |