mirror of
https://github.com/sheumann/hush.git
synced 2024-12-25 18:33:06 +00:00
Patch from Ned Ludd, solar at gentoo dot org:
I had previously provided you with a patch to help complete busybox's props suite, but have heard no word back. Sense then I've made use of as many of busybox's native API settings as I could find and would really love for you to include support for this. If there is something more I need to do to get this supported added in please let me know.
This commit is contained in:
Eric Andersen
parent
5089534be0
commit
b90502828c
@ -553,6 +553,9 @@
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#ifdef CONFIG_SYNC
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APPLET(sync, sync_main, _BB_DIR_BIN, _BB_SUID_NEVER)
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#endif
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#ifdef CONFIG_SYSCTL
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APPLET(sysctl, sysctl_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
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#endif
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#ifdef CONFIG_SYSLOGD
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APPLET(syslogd, syslogd_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
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#endif
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@ -2266,6 +2266,27 @@
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#define USAGE_IPC_LOG(a)
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#endif
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#ifdef CONFIG_SYSCTL
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#define sysctl_trivial_usage \
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"[OPTIONS]... [VALUE]...\n"
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#define sysctl_full_usage
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"sysctl - configure kernel parameters at runtime\n\n" \
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"Options:\n" \
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"\t-n\tUse this option to disable printing of the key name when printing values.\n" \
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"\t-e\tUse this option to ignore errors about unknown keys.\n" \
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"\t-w\tUse this option when you want to change a sysctl setting.\n" \
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"\t-p\tLoad in sysctl settings from the file specified or /etc/sysctl.conf if none given.\n" \
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"\t-a\tDisplay all values currently available.\n" \
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"\t-A\tDisplay all values currently available in table form."
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#define sysctl_example_usage
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"sysctl [-n] [-e] variable ...\n" \
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"sysctl [-n] [-e] -w variable=value ...\n" \
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"sysctl [-n] [-e] -a\n" \
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"sysctl [-n] [-e] -p <file>\t(default /etc/sysctl.conf)\n" \
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"sysctl [-n] [-e] -A\n"
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#endif
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#define syslogd_trivial_usage \
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"[OPTION]..."
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#define syslogd_full_usage \
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@ -72,5 +72,11 @@ config CONFIG_UPTIME
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the system has been running, how many users are currently logged
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on, and the system load averages for the past 1, 5, and 15 minutes.
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config CONFIG_SYSCTL
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bool "sysctl"
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default n
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help
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sysctl - configure kernel parameters at runtime
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endmenu
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@ -28,6 +28,7 @@ PROCPS-$(CONFIG_KILL) += kill.o
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PROCPS-$(CONFIG_PIDOF) += pidof.o
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PROCPS-$(CONFIG_PS) += ps.o
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PROCPS-$(CONFIG_RENICE) += renice.o
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PROCPS-$(CONFIG_SYSCTL) += sysctl.o
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PROCPS-$(CONFIG_TOP) += top.o
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PROCPS-$(CONFIG_UPTIME) += uptime.o
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372
procps/sysctl.c
Normal file
372
procps/sysctl.c
Normal file
@ -0,0 +1,372 @@
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/*
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* Sysctl 1.01 - A utility to read and manipulate the sysctl parameters
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*
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*
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* "Copyright 1999 George Staikos
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* This file may be used subject to the terms and conditions of the
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* GNU General Public License Version 2, or any later version
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* at your option, as published by the Free Software Foundation.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details."
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*
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* Changelog:
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* v1.01:
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* - added -p <preload> to preload values from a file
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* v1.01.1
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* - busybox applet aware by <solar@gentoo.org>
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include "busybox.h"
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/*
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* Function Prototypes
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*/
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static int sysctl_usage(void);
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static int sysctl_read_setting(const char *setting, int output);
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static int sysctl_write_setting(const char *setting, int output);
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static int sysctl_preload_file(const char *filename, int output);
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static int sysctl_display_all(const char *path, int output, int show_table);
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/*
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* Globals...
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*/
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static const char *PROC_PATH = "/proc/sys/";
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static const char *DEFAULT_PRELOAD = "/etc/sysctl.conf";
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/* error messages */
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static const char *ERR_UNKNOWN_PARAMETER = "error: Unknown parameter '%s'\n";
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static const char *ERR_MALFORMED_SETTING = "error: Malformed setting '%s'\n";
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static const char *ERR_NO_EQUALS =
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"error: '%s' must be of the form name=value\n";
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static const char *ERR_INVALID_KEY = "error: '%s' is an unknown key\n";
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static const char *ERR_UNKNOWN_WRITING =
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"error: unknown error %d setting key '%s'\n";
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static const char *ERR_UNKNOWN_READING =
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"error: unknown error %d reading key '%s'\n";
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static const char *ERR_PERMISSION_DENIED =
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"error: permission denied on key '%s'\n";
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static const char *ERR_OPENING_DIR = "error: unable to open directory '%s'\n";
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static const char *ERR_PRELOAD_FILE =
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"error: unable to open preload file '%s'\n";
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static const char *WARN_BAD_LINE =
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"warning: %s(%d): invalid syntax, continuing...\n";
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/*
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* sysctl_main()...
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*/
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int sysctl_main(int argc, char **argv)
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{
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int retval = 0;
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int output = 1;
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int write_mode = 0;
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int switches_allowed = 1;
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if (argc < 2)
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return sysctl_usage();
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argv++;
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for (; argv && *argv && **argv; argv++) {
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if (switches_allowed && **argv == '-') { /* we have a switch */
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switch ((*argv)[1]) {
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case 'n':
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output = 0;
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break;
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case 'w':
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write_mode = 1;
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switches_allowed = 0;
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break;
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case 'p':
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argv++;
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return
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sysctl_preload_file(((argv && *argv
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&& **argv) ? *argv :
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DEFAULT_PRELOAD), output);
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case 'a':
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case 'A':
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switches_allowed = 0;
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return sysctl_display_all(PROC_PATH, output,
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((*argv)[1] == 'a') ? 0 : 1);
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case 'h':
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case '?':
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return sysctl_usage();
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default:
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bb_error_msg(ERR_UNKNOWN_PARAMETER, *argv);
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return sysctl_usage();
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}
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} else {
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switches_allowed = 0;
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if (write_mode)
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retval = sysctl_write_setting(*argv, output);
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else
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sysctl_read_setting(*argv, output);
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}
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}
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return retval;
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} /* end sysctl_main() */
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/*
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* Display the sysctl_usage format
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*/
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int sysctl_usage()
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{
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bb_show_usage();
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return -1;
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} /* end sysctl_usage() */
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/*
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* sysctl_preload_file
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* preload the sysctl's from a conf file
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* - we parse the file and then reform it (strip out whitespace)
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*/
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int sysctl_preload_file(const char *filename, int output)
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{
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int lineno = 0;
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char oneline[256];
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char buffer[256];
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char *name, *value, *ptr;
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FILE *fp = NULL;
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if (!filename || ((fp = fopen(filename, "r")) == NULL)) {
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bb_error_msg(ERR_PRELOAD_FILE, filename);
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return 1;
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}
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while (fgets(oneline, sizeof(oneline) - 1, fp)) {
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oneline[sizeof(oneline) - 1] = 0;
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lineno++;
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trim(oneline);
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ptr = (char *) oneline;
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if (*ptr == '#' || *ptr == ';')
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continue;
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if (bb_strlen(ptr) < 2)
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continue;
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name = strtok(ptr, "=");
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if (!name || !*name) {
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bb_error_msg(WARN_BAD_LINE, filename, lineno);
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continue;
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}
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trim(name);
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value = strtok(NULL, "\n\r");
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if (!value || !*value) {
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bb_error_msg(WARN_BAD_LINE, filename, lineno);
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continue;
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}
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while ((*value == ' ' || *value == '\t') && *value != 0)
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value++;
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strncpy(buffer, name, sizeof(buffer));
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strncat(buffer, "=", sizeof(buffer));
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strncat(buffer, value, sizeof(buffer));
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sysctl_write_setting(buffer, output);
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}
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fclose(fp);
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return 0;
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} /* end sysctl_preload_file() */
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/*
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* Write a single sysctl setting
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*/
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int sysctl_write_setting(const char *setting, int output)
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{
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int retval = 0;
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const char *name = setting;
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const char *value;
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const char *equals;
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char *tmpname, *outname, *cptr;
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int fd = -1;
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if (!name) /* probably dont' want to display this err */
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return 0;
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if (!(equals = index(setting, '='))) {
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bb_error_msg(ERR_NO_EQUALS, setting);
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return -1;
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}
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value = equals + sizeof(char); /* point to the value in name=value */
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if (!*name || !*value || name == equals) {
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bb_error_msg(ERR_MALFORMED_SETTING, setting);
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return -2;
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}
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tmpname =
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(char *) xmalloc((equals - name + 1 + bb_strlen(PROC_PATH)) *
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sizeof(char));
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outname = (char *) xmalloc((equals - name + 1) * sizeof(char));
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strcpy(tmpname, PROC_PATH);
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strncat(tmpname, name, (int) (equals - name));
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tmpname[equals - name + bb_strlen(PROC_PATH)] = 0;
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strncpy(outname, name, (int) (equals - name));
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outname[equals - name] = 0;
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while ((cptr = strchr(tmpname, '.')) != NULL)
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*cptr = '/';
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while ((cptr = strchr(outname, '/')) != NULL)
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*cptr = '.';
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if ((fd = open(tmpname, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
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switch (errno) {
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case ENOENT:
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bb_error_msg(ERR_INVALID_KEY, outname);
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break;
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case EACCES:
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bb_perror_msg(ERR_PERMISSION_DENIED, outname);
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break;
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default:
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bb_error_msg(ERR_UNKNOWN_WRITING, errno, outname);
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break;
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}
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retval = -1;
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} else {
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write(fd, value, bb_strlen(value));
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close(fd);
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if (output) {
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write(STDOUT_FILENO, outname, bb_strlen(outname));
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write(STDOUT_FILENO, " = ", 3);
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}
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write(STDOUT_FILENO, value, bb_strlen(value));
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write(STDOUT_FILENO, "\n", 1);
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}
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/* cleanup */
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free(tmpname);
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free(outname);
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return retval;
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} /* end sysctl_write_setting() */
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/*
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* Read a sysctl setting
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*
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*/
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int sysctl_read_setting(const char *setting, int output)
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{
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int retval = 0;
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char *tmpname, *outname, *cptr;
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char inbuf[1025];
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const char *name = setting;
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FILE *fp;
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if (!setting || !*setting)
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bb_error_msg(ERR_INVALID_KEY, setting);
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tmpname =
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(char *) xmalloc((bb_strlen(name) + bb_strlen(PROC_PATH) + 1) *
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sizeof(char));
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outname = (char *) xmalloc((bb_strlen(name) + 1) * sizeof(char));
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strcpy(tmpname, PROC_PATH);
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strcat(tmpname, name);
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strcpy(outname, name);
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while ((cptr = strchr(tmpname, '.')) != NULL)
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*cptr = '/';
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while ((cptr = strchr(outname, '/')) != NULL)
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*cptr = '.';
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if ((fp = fopen(tmpname, "r")) == NULL) {
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switch (errno) {
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case ENOENT:
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bb_error_msg(ERR_INVALID_KEY, outname);
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break;
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case EACCES:
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bb_error_msg(ERR_PERMISSION_DENIED, outname);
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break;
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default:
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bb_error_msg(ERR_UNKNOWN_READING, errno, outname);
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break;
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}
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retval = -1;
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} else {
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while (fgets(inbuf, sizeof(inbuf) - 1, fp)) {
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if (output) {
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write(STDOUT_FILENO, outname, bb_strlen(outname));
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write(STDOUT_FILENO, " = ", 3);
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}
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write(STDOUT_FILENO, inbuf, bb_strlen(inbuf));
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}
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fclose(fp);
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}
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free(tmpname);
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free(outname);
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return retval;
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} /* end sysctl_read_setting() */
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/*
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* Display all the sysctl settings
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*
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*/
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int sysctl_display_all(const char *path, int output, int show_table)
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{
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int retval = 0;
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int retval2;
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DIR *dp;
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struct dirent *de;
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char *tmpdir;
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struct stat ts;
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if (!(dp = opendir(path))) {
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bb_perror_msg(ERR_OPENING_DIR, path);
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retval = -1;
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} else {
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readdir(dp);
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readdir(dp); /* skip . and .. */
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while ((de = readdir(dp)) != NULL) {
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tmpdir =
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(char *) xmalloc(bb_strlen(path) + bb_strlen(de->d_name) + 2);
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strcpy(tmpdir, path);
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strcat(tmpdir, de->d_name);
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if ((retval2 = stat(tmpdir, &ts)) != 0)
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bb_perror_msg(tmpdir);
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else {
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if (S_ISDIR(ts.st_mode)) {
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strcat(tmpdir, "/");
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sysctl_display_all(tmpdir, output, show_table);
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} else
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retval |=
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sysctl_read_setting(tmpdir + bb_strlen(PROC_PATH),
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output);
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}
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free(tmpdir);
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} /* end while */
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closedir(dp);
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}
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return retval;
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} /* end sysctl_display_all() */
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#ifdef STANDALONE_SYSCTL
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int main(int argc, char **argv)
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{
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return sysctl_main(argc, argv);
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}
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#endif
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Block a user