Check-in [9b491cd779]
Overview
Comment:Implemented rlimit and klogctl
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 9b491cd779694d2aec49fa71f4f8677bc299a173
User & Date: rkeene on 2014-11-03 16:34:22
Other Links: manifest | tags
Context
2014-11-03
17:15
Added UNIX command-workalikes for dmesg/ulimit check-in: 55756e0014 user: rkeene tags: trunk
16:34
Implemented rlimit and klogctl check-in: 9b491cd779 user: rkeene tags: trunk
2014-10-30
19:16
Added "ps" command check-in: 4ee619220a user: rkeene tags: trunk
Changes

Modified tuapi.c from [f152339f63] to [d5c20667b1].

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#define _LINUX_SOURCE 1
#include <sys/resource.h>
#include <sys/syscall.h>
#include <sys/termios.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/mount.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/klog.h>
#include <sys/swap.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/un.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
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#endif
#ifndef MNT_EXPIRE
#define MNT_EXPIRE 4
#endif
#ifndef MS_MOVE
#define MS_MOVE 8192
#endif
#ifndef SYSLOG_ACTION_CLOSE
#define SYSLOG_ACTION_CLOSE 0
#endif
#ifndef SYSLOG_ACTION_OPEN
#define SYSLOG_ACTION_OPEN 1
#endif
#ifndef SYSLOG_ACTION_READ_ALL
#define SYSLOG_ACTION_READ_ALL 3
#endif
#ifndef SYSLOG_ACTION_CLEAR
#define SYSLOG_ACTION_CLEAR 5
#endif
#ifndef SYSLOG_ACTION_CONSOLE_OFF
#define SYSLOG_ACTION_CONSOLE_OFF 6
#endif
#ifndef SYSLOG_ACTION_CONSOLE_ON
#define SYSLOG_ACTION_CONSOLE_ON 7
#endif

/* Simple macros */
#ifndef MAX
#define MAX(a, b) (((a) < (b)) ? (b) : (a))
#endif
#ifndef MIN
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
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	if (retobj != NULL) {
		Tcl_SetObjResult(interp, retobj);
	}

	return(retval);
}

static int tuapi_rlimit(ClientData cd, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]) {
	Tcl_Obj *operation_obj, *resource_id_obj, *resource_val_item_obj, *resource_val_itemval_obj, *ret_obj;
	struct rlimit resource_val;
	Tcl_WideInt resource_val_item;
	int resource_id;
	int rlimit_ret, tcl_ret;

	if (objc < 3) {
		Tcl_SetObjResult(interp, Tcl_NewStringObj("wrong # args: should be \"::tuapi::syscall::rlimit operation resource ?value?\"", -1));

		return(TCL_ERROR);
	}

	operation_obj = objv[1];
	resource_id_obj = objv[2];

	switch (tuapi_internal_simplehash_obj(resource_id_obj)) {
		case 0x20d3LU: /* AS */
			resource_id = RLIMIT_AS;
			break;
		case 0x873e945LU: /* CORE */
			resource_id = RLIMIT_CORE;
			break;
		case 0x10e855LU: /* CPU */
			resource_id = RLIMIT_CPU;
			break;
		case 0x8906a41LU: /* DATA */
			resource_id = RLIMIT_DATA;
			break;
		case 0x6a726f45LU: /* FSIZE */
			resource_id = RLIMIT_FSIZE;
			break;
#ifdef RLIMIT_LOCKS
		case 0xc9f0e7d3LU: /* LOCKS */
			resource_id = RLIMIT_LOCKS;
			break;
#endif
		case 0xd908f7cbLU: /* MEMLOCK */
			resource_id = RLIMIT_MEMLOCK;
			break;
#ifdef RLIMIT_MSGQUEUE
		case 0x57167445LU: /* MSGQUEUE */
			resource_id = RLIMIT_MSGQUEUE;
			break;
#endif
		case 0x9d261c5LU: /* NICE */
			resource_id = RLIMIT_NICE;
			break;
		case 0xf8d35c45LU: /* NOFILE */
		case 0xf8d26445LU: /* OFILE */
			resource_id = RLIMIT_NOFILE;
			break;
		case 0xea14a5c3LU: /* NPROC */
			resource_id = RLIMIT_NPROC;
			break;
		case 0x14a9d3LU: /* RSS */
			resource_id = RLIMIT_RSS;
			break;
#ifdef RLIMIT_RTPRIO
		case 0x4a15ee4fLU: /* RTPRIO */
			resource_id = RLIMIT_RTPRIO;
			break;
#endif
#ifdef RLIMIT_RTTIME
		case 0x4a932c45LU: /* RTTIME */
			resource_id = RLIMIT_RTTIME;
			break;
#endif
#ifdef RLIMIT_SIGPENDING
		case 0x2f390347LU: /* SIGPENDING */
			resource_id = RLIMIT_SIGPENDING;
			break;
#endif
		case 0x3a90634bLU: /* STACK */
			resource_id = RLIMIT_STACK;
			break;
		default:
			Tcl_SetObjResult(interp, Tcl_NewStringObj("invalid resource", -1));

			return(TCL_ERROR);
	}

	if (strcmp(Tcl_GetString(operation_obj), "get") == 0) {
		if (objc != 3) {
			Tcl_SetObjResult(interp, Tcl_NewStringObj("wrong # args: should be \"::tuapi::syscall::rlimit get resource\"", -1));

			return(TCL_ERROR);
		}

		rlimit_ret = getrlimit(resource_id, &resource_val);
		if (rlimit_ret != 0) {
			Tcl_SetObjResult(interp, Tcl_NewStringObj("getrlimit() failed", -1));

			return(TCL_ERROR);
		}

		ret_obj = Tcl_NewObj();
		Tcl_ListObjAppendElement(interp, ret_obj, Tcl_NewStringObj("soft", -1));
		Tcl_ListObjAppendElement(interp, ret_obj, Tcl_NewWideIntObj(resource_val.rlim_cur));
		Tcl_ListObjAppendElement(interp, ret_obj, Tcl_NewStringObj("hard", -1));
		Tcl_ListObjAppendElement(interp, ret_obj, Tcl_NewWideIntObj(resource_val.rlim_max));

		Tcl_SetObjResult(interp, ret_obj);

		return(TCL_OK);
	}

	if (strcmp(Tcl_GetString(operation_obj), "set") == 0) {
		if (objc != 4) {
			Tcl_SetObjResult(interp, Tcl_NewStringObj("wrong # args: should be \"::tuapi::syscall::rlimit set resource value\"", -1));

			return(TCL_ERROR);
		}

		resource_val_item_obj = objv[3];

		/* Determine if we were asked to set to a simple value, in which case set both hard and soft limits */
		tcl_ret = Tcl_GetWideIntFromObj(NULL, resource_val_item_obj, &resource_val_item);
		if (tcl_ret == TCL_OK) {
			resource_val.rlim_cur = resource_val_item;
			resource_val.rlim_max = resource_val_item;
		} else {
			tcl_ret = Tcl_DictObjGet(NULL, resource_val_item_obj, Tcl_NewStringObj("soft", -1), &resource_val_itemval_obj);
			if (tcl_ret != TCL_OK) {
				Tcl_SetObjResult(interp, Tcl_NewStringObj("invalid request", -1));

				return(TCL_ERROR);
			}

			tcl_ret = Tcl_GetWideIntFromObj(NULL, resource_val_itemval_obj, &resource_val_item);
			if (tcl_ret != TCL_OK) {
				Tcl_SetObjResult(interp, Tcl_NewStringObj("invalid request", -1));

				return(TCL_ERROR);
			}

			resource_val.rlim_cur = resource_val_item;

			tcl_ret = Tcl_DictObjGet(NULL, resource_val_item_obj, Tcl_NewStringObj("hard", -1), &resource_val_itemval_obj);
			if (tcl_ret != TCL_OK) {
				Tcl_SetObjResult(interp, Tcl_NewStringObj("invalid request", -1));

				return(TCL_ERROR);
			}

			tcl_ret = Tcl_GetWideIntFromObj(NULL, resource_val_itemval_obj, &resource_val_item);
			if (tcl_ret != TCL_OK) {
				Tcl_SetObjResult(interp, Tcl_NewStringObj("invalid request", -1));

				return(TCL_ERROR);
			}

			resource_val.rlim_max = resource_val_item;
		}

		rlimit_ret = setrlimit(resource_id, &resource_val);
		if (rlimit_ret != 0) {
			Tcl_SetObjResult(interp, Tcl_NewStringObj("setrlimit() failed", -1));

			return(TCL_ERROR);
		}

		return(TCL_OK);
	}

	Tcl_SetObjResult(interp, Tcl_NewStringObj("invalid operation", -1));

	return(TCL_ERROR);
}

static int tuapi_klogctl(ClientData cd, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]) {
	Tcl_Obj *operation_obj;
	char *buf;
	int buflen;
	int klog_ret;

	if (objc < 2) {
		Tcl_SetObjResult(interp, Tcl_NewStringObj("wrong # args: should be \"::tuapi::syscall::klogctl operation ...\"", -1));

		return(TCL_ERROR);
	}

	klog_ret = klogctl(SYSLOG_ACTION_OPEN, NULL, 0);
	if (klog_ret != 0) {
		Tcl_SetObjResult(interp, Tcl_NewStringObj("klogctl(SYSLOG_ACTION_OPEN, ...) failed", -1));
		return(TCL_ERROR);
	}

	operation_obj = objv[1];
	switch (tuapi_internal_simplehash_obj(operation_obj)) {
		case 0xe5970e4LU: /* read */
			buflen = 256 * 1024;
			buf = malloc(buflen);
			if (buf == NULL) {
				Tcl_SetObjResult(interp, Tcl_NewStringObj("malloc failed !", -1));

				return(TCL_ERROR);
			}

			klog_ret = klogctl(SYSLOG_ACTION_READ_ALL, buf, buflen);
			if (klog_ret == -1) {
				free(buf);

				Tcl_SetObjResult(interp, Tcl_NewStringObj("klogctl(SYSLOG_ACTION_READ_ALL, ...) failed", -1));

				return(TCL_ERROR);
			}

			Tcl_SetObjResult(interp, Tcl_NewByteArrayObj((unsigned char *) buf, klog_ret));

			free(buf);

			return(TCL_OK);
		case 0x3d9973f2LU: /* clear */
			klog_ret = klogctl(SYSLOG_ACTION_CLEAR, NULL, 0);
			if (klog_ret == -1) {
				Tcl_SetObjResult(interp, Tcl_NewStringObj("klogctl(SYSLOG_ACTION_CLEAR, ...) failed", -1));

				return(TCL_ERROR);
			}

			return(TCL_OK);
		case 0x225c336eLU: /* console_on */
			klog_ret = klogctl(SYSLOG_ACTION_CONSOLE_ON, NULL, 0);
			if (klog_ret == -1) {
				Tcl_SetObjResult(interp, Tcl_NewStringObj("klogctl(SYSLOG_ACTION_CONSOLE_ON, ...) failed", -1));

				return(TCL_ERROR);
			}

			return(TCL_OK);
		case 0x2e19bbe6LU: /* console_off */
			klog_ret = klogctl(SYSLOG_ACTION_CONSOLE_OFF, NULL, 0);
			if (klog_ret == -1) {
				Tcl_SetObjResult(interp, Tcl_NewStringObj("klogctl(SYSLOG_ACTION_CONSOLE_OFF, ...) failed", -1));

				return(TCL_ERROR);
			}

			return(TCL_OK);
	}

	Tcl_SetObjResult(interp, Tcl_NewStringObj("invalid subcommand", -1));

	return(TCL_ERROR);
}

#ifndef DISABLE_UNIX_SOCKETS
struct tuapi_socket_unix__chan_id {
	int fd;
	Tcl_Channel chan;
};

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	/* Kernel maintenance related commands */
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::insmod", tuapi_insmod, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::rmmod", tuapi_rmmod, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::lsmod", tuapi_lsmod, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::hostname", tuapi_hostname, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::domainname", tuapi_domainname, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::klogctl", tuapi_klogctl, NULL, NULL);

	/* Block or char device related commands */
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::losetup", tuapi_losetup, NULL, NULL);

	/* Filesystem related commands */
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::mount", tuapi_mount, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::umount", tuapi_umount, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::swapon", tuapi_swapon, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::swapoff", tuapi_swapoff, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::mknod", tuapi_mknod, NULL, NULL);

	/* Process related commands */
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::getuid", tuapi_getuid, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::chroot", tuapi_chroot, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::pivot_root", tuapi_pivot_root, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::kill", tuapi_kill, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::ps", tuapi_ps, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::execve", tuapi_execve, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::rlimit", tuapi_rlimit, NULL, NULL);

	/* Network related commands */
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::ifconfig", tuapi_ifconfig, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::route", tuapi_route, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::brctl", tuapi_brctl, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::tuapi::syscall::vconfig", tuapi_vconfig, NULL, NULL);