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Diffstat (limited to 'main.c')
| -rw-r--r-- | main.c | 315 |
1 files changed, 0 insertions, 315 deletions
@@ -1,315 +0,0 @@ -/* Hurd /proc filesystem, main program. - Copyright (C) 2010 Free Software Foundation, Inc. - - This file is part of the GNU Hurd. - - The GNU Hurd 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, or (at - your option) any later version. - - The GNU Hurd 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ - -#include <mach.h> -#include <hurd.h> -#include <unistd.h> -#include <error.h> -#include <argp.h> -#include <argz.h> -#include <hurd/netfs.h> -#include <ps.h> -#include "procfs.h" -#include "proclist.h" -#include "rootdir.h" -#include "dircat.h" -#include "main.h" - -/* Command-line options */ -int opt_clk_tck; -mode_t opt_stat_mode; -pid_t opt_fake_self; -pid_t opt_kernel_pid; -uid_t opt_anon_owner; - -/* Default values */ -#define OPT_CLK_TCK sysconf(_SC_CLK_TCK) -#define OPT_STAT_MODE 0400 -#define OPT_FAKE_SELF -1 -#define OPT_KERNEL_PID 2 -#define OPT_ANON_OWNER 0 - -#define NODEV_KEY -1 /* <= 0, so no short option. */ -#define NOEXEC_KEY -2 /* Likewise. */ -#define NOSUID_KEY -3 /* Likewise. */ - -static error_t -argp_parser (int key, char *arg, struct argp_state *state) -{ - struct passwd *pw; - char *endp; - long int v; - - switch (key) - { - case 'h': - v = strtol (arg, &endp, 0); - if (*endp || ! *arg || v <= 0) - argp_error (state, "--clk-tck: HZ should be a positive integer"); - else - opt_clk_tck = v; - break; - - case 's': - v = strtol (arg, &endp, 8); - if (*endp || ! *arg || (mode_t) v & ~07777) - argp_error (state, "--stat-mode: MODE should be an octal mode"); - else - opt_stat_mode = v; - break; - - case 'S': - if (arg) - { - v = strtol (arg, &endp, 0); - if (*endp || ! *arg) - argp_error (state, "--fake-self: PID must be an integer"); - else - opt_fake_self = v; - } - else - opt_fake_self = 1; - break; - - case 'k': - v = strtol (arg, &endp, 0); - if (*endp || ! *arg || (signed) opt_kernel_pid < 0) - argp_error (state, "--kernel-process: PID must be a positive integer"); - else - opt_kernel_pid = v; - break; - - case 'c': - opt_clk_tck = 100; - opt_stat_mode = 0444; - opt_fake_self = 1; - break; - - case 'a': - pw = getpwnam (arg); - if (pw) - { - opt_anon_owner = pw->pw_uid; - break; - } - - v = strtol (arg, &endp, 0); - if (*endp || ! *arg || v < 0) - argp_error (state, "--anonymous-owner: USER should be " - "a user name or a numeric UID."); - else - opt_anon_owner = v; - break; - - case NODEV_KEY: - /* Ignored for compatibility with Linux' procfs. */ - ;; - - case NOEXEC_KEY: - /* Ignored for compatibility with Linux' procfs. */ - ;; - - case NOSUID_KEY: - /* Ignored for compatibility with Linux' procfs. */ - ;; - - default: - return ARGP_ERR_UNKNOWN; - } - - return 0; -} - -struct argp_option common_options[] = { - { "clk-tck", 'h', "HZ", 0, - "Unit used for the values expressed in system clock ticks " - "(default: sysconf(_SC_CLK_TCK))" }, - { "stat-mode", 's', "MODE", 0, - "The [pid]/stat file publishes information which on Hurd is only " - "available to the process owner. " - "You can use this option to override its mode to be more permissive " - "for compatibility purposes. " - "(default: 0400)" }, - { "fake-self", 'S', "PID", OPTION_ARG_OPTIONAL, - "Provide a fake \"self\" symlink to the given PID, for compatibility " - "purposes. If PID is omitted, \"self\" will point to init. " - "(default: no self link)" }, - { "kernel-process", 'k', "PID", 0, - "Process identifier for the kernel, used to retreive its command " - "line, as well as the global up and idle times. " - "(default: 2)" }, - { "compatible", 'c', NULL, 0, - "Try to be compatible with the Linux procps utilities. " - "Currently equivalent to -h 100 -s 0444 -S 1." }, - { "anonymous-owner", 'a', "USER", 0, - "Make USER the owner of files related to processes without one. " - "Be aware that USER will be granted access to the environment and " - "other sensitive information about the processes in question. " - "(default: use uid 0)" }, - { "nodev", NODEV_KEY, NULL, 0, - "Ignored for compatibility with Linux' procfs." }, - { "noexec", NOEXEC_KEY, NULL, 0, - "Ignored for compatibility with Linux' procfs." }, - { "nosuid", NOSUID_KEY, NULL, 0, - "Ignored for compatibility with Linux' procfs." }, - {} -}; - -struct argp argp = { - .options = common_options, - .parser = argp_parser, - .doc = "A virtual filesystem emulating the Linux procfs.", - .children = (struct argp_child []) { - { &netfs_std_startup_argp, }, - {} - }, -}; - -static error_t -runtime_argp_parser (int key, char *arg, struct argp_state *state) -{ - switch (key) - { - case 'u': - /* do nothing */ - break; - - default: - return ARGP_ERR_UNKNOWN; - } - - return 0; -} - -struct argp runtime_argp = { - .options = (struct argp_option []) { - { "update", 'u', NULL, 0, "remount; for procfs this does nothing" }, - {}, - }, - .parser = runtime_argp_parser, -}; - -struct argp netfs_runtime_argp_ = { - .options = common_options, - .parser = argp_parser, - .doc = "A virtual filesystem emulating the Linux procfs.", - .children = (struct argp_child []) { - { &runtime_argp, }, - { &netfs_std_runtime_argp, }, - {} - }, -}; - -/* Used by netfs_set_options to handle runtime option parsing. */ -struct argp *netfs_runtime_argp = &argp; - -/* Return an argz string describing the current options. Fill *ARGZ - with a pointer to newly malloced storage holding the list and *LEN - to the length of that storage. */ -error_t -netfs_append_args (char **argz, size_t *argz_len) -{ - char buf[80]; - error_t err = 0; - -#define FOPT(opt, default, fmt, args...) \ - do { \ - if (! err && opt != default) \ - { \ - snprintf (buf, sizeof buf, fmt, ## args); \ - err = argz_add (argz, argz_len, buf); \ - } \ - } while (0) - - FOPT (opt_clk_tck, OPT_CLK_TCK, - "--clk-tck=%d", opt_clk_tck); - - FOPT (opt_stat_mode, OPT_STAT_MODE, - "--stat-mode=%o", opt_stat_mode); - - FOPT (opt_fake_self, OPT_FAKE_SELF, - "--fake-self=%d", opt_fake_self); - - FOPT (opt_anon_owner, OPT_ANON_OWNER, - "--anonymous-owner=%d", opt_anon_owner); - - FOPT (opt_kernel_pid, OPT_KERNEL_PID, - "--kernel-process=%d", opt_kernel_pid); - -#undef FOPT - - if (! err) - err = netfs_append_std_options (argz, argz_len); - - return err; -} - -error_t -root_make_node (struct ps_context *pc, struct node **np) -{ - struct node *root_dirs[] = { - proclist_make_node (pc), - rootdir_make_node (pc), - }; - - *np = dircat_make_node (root_dirs, sizeof root_dirs / sizeof root_dirs[0]); - if (! *np) - return ENOMEM; - - /* Since this one is not created through proc_lookup(), we have to affect an - inode number to it. */ - (*np)->nn_stat.st_ino = * (uint32_t *) "PROC"; - - return 0; -} - -int main (int argc, char **argv) -{ - struct ps_context *pc; - mach_port_t bootstrap; - error_t err; - - opt_clk_tck = OPT_CLK_TCK; - opt_stat_mode = OPT_STAT_MODE; - opt_fake_self = OPT_FAKE_SELF; - opt_kernel_pid = OPT_KERNEL_PID; - opt_anon_owner = OPT_ANON_OWNER; - err = argp_parse (&argp, argc, argv, 0, 0, 0); - if (err) - error (1, err, "Could not parse command line"); - - err = ps_context_create (getproc (), &pc); - if (err) - error (1, err, "Could not create libps context"); - - task_get_bootstrap_port (mach_task_self (), &bootstrap); - if (bootstrap == MACH_PORT_NULL) - error (1, 0, "Must be started as a translator"); - - netfs_init (); - err = root_make_node (pc, &netfs_root_node); - if (err) - error (1, err, "Could not create the root node"); - - netfs_startup (bootstrap, 0); - netfs_server_loop (); - - assert (0 /* netfs_server_loop returned after all */); -} - |