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minix/servers/rs/service.c
Thomas Veerman b47483433c Added a hack to start binaries from the boot image only. In particular, setting 
bin_img=1 in the boot monitor will make sure that during the boot procedure the
mfs binary that is part of the boot image is the only binary that is used to
mount partitions. This is useful when for some reason the mfs binary on disk 
malfunctions, rendering Minix unable to boot. By setting bin_img=1, the binary
on disk is ignored and the binary in the boot image is used instead.

- 'service' now accepts an additional flag -r. -r implies -c. -r instructs RS
  to first look in memory if the binary has already been copied to memory and
  execute that version, instead of loading the binary from disk. For example,
  the first time a MFS is being started it is copied (-c) to memory and
  executed from there. The second time MFS is being started this way, RS will
  look in memory for a previously copied MFS binary and reuse it if it exists.
- The mount and newroot commands now accept an additional flag -i, which
  instructs them to set the MS_REUSE flag in the mount flags.
- The mount system call now supports the MS_REUSE flag and invokes 'service'
  with the -r flag when MS_REUSE is set.
- /etc/rc and the rc script that's included in the boot image check for the
  existence of the bin_img flag in the boot monitor, and invoke mount and 
  newroot with the -i flag accordingly.
2009-08-18 11:36:01 +00:00

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/* Utility to start or stop system services. Requests are sent to the
* reincarnation server that does the actual work.
*
* Changes:
* Jul 22, 2005: Created (Jorrit N. Herder)
*/
#include <stdarg.h>
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <pwd.h>
#include <unistd.h>
#include <minix/config.h>
#include <minix/com.h>
#include <minix/const.h>
#include <minix/type.h>
#include <minix/ipc.h>
#include <minix/rs.h>
#include <minix/syslib.h>
#include <minix/sysinfo.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <configfile.h>
/* This array defines all known requests. */
PRIVATE char *known_requests[] = {
"up",
"down",
"refresh",
"restart",
"-unused",
"shutdown",
"upcopy", /* fill for RS_UP_COPY */
"catch for illegal requests"
};
#define ILLEGAL_REQUEST sizeof(known_requests)/sizeof(char *)
/* Global error number set for failed system calls. */
#define OK 0
#define RUN_CMD "run"
#define RUN_SCRIPT "/etc/rs.single" /* Default script for 'run' */
#define PATH_CONFIG "/etc/drivers.conf" /* Default config file */
/* Define names for arguments provided to this utility. The first few
* arguments are required and have a known index. Thereafter, some optional
* argument pairs like "-args arglist" follow.
*/
#define ARG_NAME 0 /* own application name */
/* The following are relative to optind */
#define ARG_REQUEST 0 /* request to perform */
#define ARG_PATH 1 /* rescue dir or system service */
#define ARG_LABEL 1 /* name of system service */
#define MIN_ARG_COUNT 1 /* require an action */
#define ARG_ARGS "-args" /* list of arguments to be passed */
#define ARG_DEV "-dev" /* major device number for drivers */
#define ARG_PERIOD "-period" /* heartbeat period in ticks */
#define ARG_SCRIPT "-script" /* name of the script to restart a
* driver
*/
#define ARG_LABELNAME "-label" /* custom label name */
#define ARG_CONFIG "-config" /* name of the file with the resource
* configuration
*/
#define ARG_PRINTEP "-printep" /* print endpoint number after start */
#define DRIVER_LOGIN "driver" /* Passwd file entry for drivers */
#define MAX_CLASS_RECURS 100 /* Max nesting level for classes */
/* The function parse_arguments() verifies and parses the command line
* parameters passed to this utility. Request parameters that are needed
* are stored globally in the following variables:
*/
PRIVATE int req_type;
PRIVATE int do_run= 0; /* 'run' command instead of 'up' */
PRIVATE char *req_label;
PRIVATE char *req_path;
PRIVATE char *req_args = "";
PRIVATE int req_major;
PRIVATE long req_period;
PRIVATE char *req_script;
PRIVATE char *req_ipc;
PRIVATE char *req_config = PATH_CONFIG;
PRIVATE int req_printep;
PRIVATE int class_recurs; /* Nesting level of class statements */
/* Buffer to build "/command arg1 arg2 ..." string to pass to RS server. */
PRIVATE char command[4096];
/* Arguments for RS to start a new service */
PRIVATE struct rs_start rs_start;
/* An error occurred. Report the problem, print the usage, and exit.
*/
PRIVATE void print_usage(char *app_name, char *problem)
{
fprintf(stderr, "Warning, %s\n", problem);
fprintf(stderr, "Usage:\n");
fprintf(stderr,
" %s [-c] (up|run) <binary> [%s <args>] [%s <special>] [%s <ticks>]\n",
app_name, ARG_ARGS, ARG_DEV, ARG_PERIOD);
fprintf(stderr, " %s down label\n", app_name);
fprintf(stderr, " %s refresh label\n", app_name);
fprintf(stderr, " %s restart label\n", app_name);
fprintf(stderr, " %s rescue <dir>\n", app_name);
fprintf(stderr, " %s shutdown\n", app_name);
fprintf(stderr, "\n");
}
/* A request to the RS server failed. Report and exit.
*/
PRIVATE void failure(int num)
{
fprintf(stderr, "Request to RS failed: %s (error %d)\n", strerror(num), num);
exit(num);
}
/* Parse and verify correctness of arguments. Report problem and exit if an
* error is found. Store needed parameters in global variables.
*/
PRIVATE int parse_arguments(int argc, char **argv)
{
struct stat stat_buf;
char *hz;
int req_nr;
int c, i;
int c_flag, r_flag;
c_flag = 0;
r_flag = 0;
while (c= getopt(argc, argv, "rci?"), c != -1)
{
switch(c)
{
case '?':
print_usage(argv[ARG_NAME], "wrong number of arguments");
exit(EINVAL);
case 'c':
c_flag = 1;
break;
case 'r':
c_flag = 1; /* -r implies -c */
r_flag = 1;
break;
case 'i':
/* Legacy - remove later */
fputs("WARNING: obsolete -i flag passed to service(8)\n",
stderr);
break;
default:
fprintf(stderr, "%s: getopt failed: %c\n",
argv[ARG_NAME], c);
exit(1);
}
}
/* Verify argument count. */
if (argc < optind+MIN_ARG_COUNT) {
print_usage(argv[ARG_NAME], "wrong number of arguments");
exit(EINVAL);
}
if (strcmp(argv[optind+ARG_REQUEST], RUN_CMD) == 0)
{
req_nr= RS_UP;
do_run= TRUE;
}
else
{
/* Verify request type. */
for (req_type=0; req_type< ILLEGAL_REQUEST; req_type++) {
if (strcmp(known_requests[req_type],argv[optind+ARG_REQUEST])==0)
break;
}
if (req_type == ILLEGAL_REQUEST) {
print_usage(argv[ARG_NAME], "illegal request type");
exit(ENOSYS);
}
req_nr = RS_RQ_BASE + req_type;
}
if (req_nr == RS_UP) {
req_nr= RS_START;
rs_start.rss_flags= RF_IPC_VALID;
if (c_flag)
rs_start.rss_flags |= RF_COPY;
if(r_flag)
rs_start.rss_flags |= RF_REUSE;
if (do_run)
{
/* Set default recovery script for RUN */
req_script = RUN_SCRIPT;
req_nr = RS_START;
}
#if 0
if (req_nr == RS_UP && c_flag)
req_nr= RS_UP_COPY;
#endif
/* Verify argument count. */
if (argc - 1 < optind+ARG_PATH) {
print_usage(argv[ARG_NAME], "action requires a binary to start");
exit(EINVAL);
}
/* Verify the name of the binary of the system service. */
req_path = argv[optind+ARG_PATH];
if (req_path[0] != '/') {
print_usage(argv[ARG_NAME], "binary should be absolute path");
exit(EINVAL);
}
if (stat(req_path, &stat_buf) == -1) {
perror(req_path);
fprintf(stderr, "couldn't get stat binary\n");
exit(errno);
}
if (! (stat_buf.st_mode & S_IFREG)) {
print_usage(argv[ARG_NAME], "binary is not a regular file");
exit(EINVAL);
}
/* Check optional arguments that come in pairs like "-args arglist". */
for (i=optind+MIN_ARG_COUNT+1; i<argc; i=i+2) {
if (! (i+1 < argc)) {
print_usage(argv[ARG_NAME], "optional argument not complete");
exit(EINVAL);
}
if (strcmp(argv[i], ARG_ARGS)==0) {
req_args = argv[i+1];
}
else if (strcmp(argv[i], ARG_PERIOD)==0) {
u32_t system_hz;
if(getsysinfo_up(PM_PROC_NR,
SIU_SYSTEMHZ, sizeof(system_hz), &system_hz) < 0) {
system_hz = DEFAULT_HZ;
fprintf(stderr, "WARNING: reverting to default HZ %d\n",
system_hz);
}
req_period = strtol(argv[i+1], &hz, 10);
if (strcmp(hz,"HZ")==0) req_period *= system_hz;
if (req_period < 1) {
print_usage(argv[ARG_NAME],
"period is at least be one tick");
exit(EINVAL);
}
}
else if (strcmp(argv[i], ARG_DEV)==0) {
if (stat(argv[i+1], &stat_buf) == -1) {
perror(argv[i+1]);
print_usage(argv[ARG_NAME], "couldn't get status of device");
exit(errno);
}
if ( ! (stat_buf.st_mode & (S_IFBLK | S_IFCHR))) {
print_usage(argv[ARG_NAME], "special file is not a device");
exit(EINVAL);
}
req_major = (stat_buf.st_rdev >> MAJOR) & BYTE;
}
else if (strcmp(argv[i], ARG_SCRIPT)==0) {
req_script = argv[i+1];
req_nr = RS_START;
}
else if (strcmp(argv[i], ARG_LABELNAME)==0) {
req_label = argv[i+1];
req_nr = RS_START;
}
else if (strcmp(argv[i], ARG_CONFIG)==0) {
req_config = argv[i+1];
req_nr = RS_START;
}
else if (strcmp(argv[i], ARG_PRINTEP)==0) {
req_printep = 1;
}
else {
print_usage(argv[ARG_NAME], "unknown optional argument given");
exit(EINVAL);
}
}
}
else if (req_nr == RS_DOWN || req_nr == RS_REFRESH || req_nr == RS_RESTART) {
/* Verify argument count. */
if (argc - 1 < optind+ARG_LABEL) {
print_usage(argv[ARG_NAME], "action requires a label to stop");
exit(EINVAL);
}
req_label= argv[optind+ARG_LABEL];
}
else if (req_nr == RS_SHUTDOWN) {
/* no extra arguments required */
}
/* Return the request number if no error were found. */
return(req_nr);
}
PRIVATE void fatal(char *fmt, ...)
{
va_list ap;
fprintf(stderr, "fatal error: ");
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
exit(1);
}
#define KW_DRIVER "driver"
#define KW_UID "uid"
#define KW_NICE "nice"
#define KW_IRQ "irq"
#define KW_IO "io"
#define KW_PCI "pci"
#define KW_DEVICE "device"
#define KW_CLASS "class"
#define KW_SYSTEM "system"
#define KW_IPC "ipc"
FORWARD void do_driver(config_t *cpe, config_t *config);
PRIVATE void do_class(config_t *cpe, config_t *config)
{
config_t *cp, *cp1;
if (class_recurs > MAX_CLASS_RECURS)
{
fatal(
"do_class: nesting level too high for class '%s' at %s:%d",
cpe->word, cpe->file, cpe->line);
}
class_recurs++;
/* Process classes */
for (; cpe; cpe= cpe->next)
{
if (cpe->flags & CFG_SUBLIST)
{
fatal("do_class: unexpected sublist at %s:%d",
cpe->file, cpe->line);
}
if (cpe->flags & CFG_STRING)
{
fatal("do_uid: unexpected string at %s:%d",
cpe->file, cpe->line);
}
/* Find entry for the class */
for (cp= config; cp; cp= cp->next)
{
if (!(cp->flags & CFG_SUBLIST))
{
fatal("do_class: expected list at %s:%d\n",
cp->file, cp->line);
}
cp1= cp->list;
if ((cp1->flags & CFG_STRING) ||
(cp1->flags & CFG_SUBLIST))
{
fatal("do_class: expected word at %s:%d\n",
cp1->file, cp1->line);
}
/* At this place we expect the word 'driver' */
if (strcmp(cp1->word, KW_DRIVER) != 0)
fatal("do_class: exected word '%S' at %s:%d\n",
KW_DRIVER, cp1->file, cp1->line);
cp1= cp1->next;
if ((cp1->flags & CFG_STRING) ||
(cp1->flags & CFG_SUBLIST))
{
fatal("do_class: expected word at %s:%d\n",
cp1->file, cp1->line);
}
/* At this place we expect the name of the driver */
if (strcmp(cp1->word, cpe->word) == 0)
break;
}
if (cp == NULL)
{
fatal(
"do_class: no entry found for class '%s' at %s:%d\n",
cpe->word, cpe->file, cpe->line);
}
do_driver(cp1->next, config);
}
class_recurs--;
}
PRIVATE void do_uid(config_t *cpe)
{
uid_t uid;
struct passwd *pw;
char *check;
/* Process a uid */
if (cpe->next != NULL)
{
fatal("do_uid: just one uid/login expected at %s:%d",
cpe->file, cpe->line);
}
if (cpe->flags & CFG_SUBLIST)
{
fatal("do_uid: unexpected sublist at %s:%d",
cpe->file, cpe->line);
}
if (cpe->flags & CFG_STRING)
{
fatal("do_uid: unexpected string at %s:%d",
cpe->file, cpe->line);
}
pw= getpwnam(cpe->word);
if (pw != NULL)
uid= pw->pw_uid;
else
{
uid= strtol(cpe->word, &check, 0);
if (check[0] != '\0')
{
fatal("do_uid: bad uid/login '%s' at %s:%d",
cpe->word, cpe->file, cpe->line);
}
}
rs_start.rss_uid= uid;
}
PRIVATE void do_nice(config_t *cpe)
{
int nice_val;
char *check;
/* Process a nice value */
if (cpe->next != NULL)
{
fatal("do_nice: just one nice value expected at %s:%d",
cpe->file, cpe->line);
}
if (cpe->flags & CFG_SUBLIST)
{
fatal("do_nice: unexpected sublist at %s:%d",
cpe->file, cpe->line);
}
if (cpe->flags & CFG_STRING)
{
fatal("do_nice: unexpected string at %s:%d",
cpe->file, cpe->line);
}
nice_val= strtol(cpe->word, &check, 0);
if (check[0] != '\0')
{
fatal("do_nice: bad nice value '%s' at %s:%d",
cpe->word, cpe->file, cpe->line);
}
/* Check range? */
rs_start.rss_nice= nice_val;
}
PRIVATE void do_irq(config_t *cpe)
{
int irq;
char *check;
/* Process a list of IRQs */
for (; cpe; cpe= cpe->next)
{
if (cpe->flags & CFG_SUBLIST)
{
fatal("do_irq: unexpected sublist at %s:%d",
cpe->file, cpe->line);
}
if (cpe->flags & CFG_STRING)
{
fatal("do_irq: unexpected string at %s:%d",
cpe->file, cpe->line);
}
irq= strtoul(cpe->word, &check, 0);
if (check[0] != '\0')
{
fatal("do_irq: bad irq '%s' at %s:%d",
cpe->word, cpe->file, cpe->line);
}
if (rs_start.rss_nr_irq >= RSS_NR_IRQ)
fatal("do_irq: too many IRQs (max %d)", RSS_NR_IRQ);
rs_start.rss_irq[rs_start.rss_nr_irq]= irq;
rs_start.rss_nr_irq++;
}
}
PRIVATE void do_io(config_t *cpe)
{
int irq;
unsigned base, len;
char *check;
/* Process a list of I/O ranges */
for (; cpe; cpe= cpe->next)
{
if (cpe->flags & CFG_SUBLIST)
{
fatal("do_io: unexpected sublist at %s:%d",
cpe->file, cpe->line);
}
if (cpe->flags & CFG_STRING)
{
fatal("do_io: unexpected string at %s:%d",
cpe->file, cpe->line);
}
base= strtoul(cpe->word, &check, 0x10);
len= 1;
if (check[0] == ':')
{
len= strtoul(check+1, &check, 0x10);
}
if (check[0] != '\0')
{
fatal("do_io: bad I/O range '%s' at %s:%d",
cpe->word, cpe->file, cpe->line);
}
if (rs_start.rss_nr_io >= RSS_NR_IO)
fatal("do_io: too many I/O ranges (max %d)", RSS_NR_IO);
rs_start.rss_io[rs_start.rss_nr_io].base= base;
rs_start.rss_io[rs_start.rss_nr_io].len= len;
rs_start.rss_nr_io++;
}
}
PRIVATE void do_pci_device(config_t *cpe)
{
u16_t vid, did;
char *check, *check2;
/* Process a list of PCI device IDs */
for (; cpe; cpe= cpe->next)
{
if (cpe->flags & CFG_SUBLIST)
{
fatal("do_pci_device: unexpected sublist at %s:%d",
cpe->file, cpe->line);
}
if (cpe->flags & CFG_STRING)
{
fatal("do_pci_device: unexpected string at %s:%d",
cpe->file, cpe->line);
}
vid= strtoul(cpe->word, &check, 0x10);
if (check[0] == '/')
did= strtoul(check+1, &check2, 0x10);
if (check[0] != '/' || check2[0] != '\0')
{
fatal("do_pci_device: bad ID '%s' at %s:%d",
cpe->word, cpe->file, cpe->line);
}
if (rs_start.rss_nr_pci_id >= RSS_NR_PCI_ID)
{
fatal("do_pci_device: too many device IDs (max %d)",
RSS_NR_PCI_ID);
}
rs_start.rss_pci_id[rs_start.rss_nr_pci_id].vid= vid;
rs_start.rss_pci_id[rs_start.rss_nr_pci_id].did= did;
rs_start.rss_nr_pci_id++;
}
}
PRIVATE void do_pci_class(config_t *cpe)
{
u8_t baseclass, subclass, interface;
u32_t class_id, mask;
char *check;
/* Process a list of PCI device class IDs */
for (; cpe; cpe= cpe->next)
{
if (cpe->flags & CFG_SUBLIST)
{
fatal("do_pci_device: unexpected sublist at %s:%d",
cpe->file, cpe->line);
}
if (cpe->flags & CFG_STRING)
{
fatal("do_pci_device: unexpected string at %s:%d",
cpe->file, cpe->line);
}
baseclass= strtoul(cpe->word, &check, 0x10);
subclass= 0;
interface= 0;
mask= 0xff0000;
if (check[0] == '/')
{
subclass= strtoul(check+1, &check, 0x10);
mask= 0xffff00;
if (check[0] == '/')
{
interface= strtoul(check+1, &check, 0x10);
mask= 0xffffff;
}
}
if (check[0] != '\0')
{
fatal("do_pci_class: bad class ID '%s' at %s:%d",
cpe->word, cpe->file, cpe->line);
}
class_id= (baseclass << 16) | (subclass << 8) | interface;
if (rs_start.rss_nr_pci_class >= RSS_NR_PCI_CLASS)
{
fatal("do_pci_class: too many class IDs (max %d)",
RSS_NR_PCI_CLASS);
}
rs_start.rss_pci_class[rs_start.rss_nr_pci_class].class=
class_id;
rs_start.rss_pci_class[rs_start.rss_nr_pci_class].mask= mask;
rs_start.rss_nr_pci_class++;
}
}
PRIVATE void do_pci(config_t *cpe)
{
int i, call_nr, word, bits_per_word;
unsigned long mask;
if (cpe == NULL)
return; /* Empty PCI statement */
if (cpe->flags & CFG_SUBLIST)
{
fatal("do_pci: unexpected sublist at %s:%d",
cpe->file, cpe->line);
}
if (cpe->flags & CFG_STRING)
{
fatal("do_pci: unexpected string at %s:%d",
cpe->file, cpe->line);
}
if (strcmp(cpe->word, KW_DEVICE) == 0)
{
do_pci_device(cpe->next);
return;
}
if (strcmp(cpe->word, KW_CLASS) == 0)
{
do_pci_class(cpe->next);
return;
}
fatal("do_pci: unexpected word '%s' at %s:%d",
cpe->word, cpe->file, cpe->line);
}
struct
{
char *label;
int call_nr;
} system_tab[]=
{
{ "EXIT", SYS_EXIT },
{ "PRIVCTL", SYS_PRIVCTL },
{ "TRACE", SYS_TRACE },
{ "KILL", SYS_KILL },
{ "UMAP", SYS_UMAP },
{ "VIRCOPY", SYS_VIRCOPY },
{ "IRQCTL", SYS_IRQCTL },
{ "DEVIO", SYS_DEVIO },
{ "SDEVIO", SYS_SDEVIO },
{ "VDEVIO", SYS_VDEVIO },
{ "SETALARM", SYS_SETALARM },
{ "TIMES", SYS_TIMES },
{ "GETINFO", SYS_GETINFO },
{ "SAFECOPYFROM", SYS_SAFECOPYFROM },
{ "SAFECOPYTO", SYS_SAFECOPYTO },
{ "VSAFECOPY", SYS_VSAFECOPY },
{ "SETGRANT", SYS_SETGRANT },
{ "READBIOS", SYS_READBIOS },
{ "MAPDMA", SYS_MAPDMA },
{ "VMCTL", SYS_VMCTL },
{ "PROFBUF", SYS_PROFBUF },
{ "SYSCTL", SYS_SYSCTL },
{ NULL, 0 }
};
PRIVATE void do_ipc(config_t *cpe)
{
char *list;
size_t listsize, wordlen;
list= NULL;
listsize= 1;
list= malloc(listsize);
if (list == NULL)
fatal("do_ipc: unable to malloc %d bytes", listsize);
list[0]= '\0';
/* Process a list of process names that are allowed to be
* contacted
*/
for (; cpe; cpe= cpe->next)
{
if (cpe->flags & CFG_SUBLIST)
{
fatal("do_ipc: unexpected sublist at %s:%d",
cpe->file, cpe->line);
}
if (cpe->flags & CFG_STRING)
{
fatal("do_ipc: unexpected string at %s:%d",
cpe->file, cpe->line);
}
wordlen= strlen(cpe->word);
listsize += 1 + wordlen;
list= realloc(list, listsize);
if (list == NULL)
{
fatal("do_ipc: unable to realloc %d bytes",
listsize);
}
strcat(list, " ");
strcat(list, cpe->word);
}
#if 0
printf("do_ipc: got list '%s'\n", list);
#endif
if (req_ipc)
fatal("do_ipc: req_ipc is set");
req_ipc= list;
}
PRIVATE void do_system(config_t *cpe)
{
int i, call_nr, word, bits_per_word;
unsigned long mask;
bits_per_word= sizeof(rs_start.rss_system[0])*8;
/* Process a list of 'system' calls that are allowed */
for (; cpe; cpe= cpe->next)
{
if (cpe->flags & CFG_SUBLIST)
{
fatal("do_system: unexpected sublist at %s:%d",
cpe->file, cpe->line);
}
if (cpe->flags & CFG_STRING)
{
fatal("do_system: unexpected string at %s:%d",
cpe->file, cpe->line);
}
/* Get call number */
for (i= 0; system_tab[i].label != NULL; i++)
{
if (strcmp(cpe->word, system_tab[i].label) == 0)
break;
}
if (system_tab[i].label == NULL)
{
fatal("do_system: unknown call '%s' at %s:%d",
cpe->word, cpe->file, cpe->line);
}
call_nr= system_tab[i].call_nr;
/* Subtract KERNEL_CALL */
if (call_nr < KERNEL_CALL)
{
fatal(
"do_system: bad call number %d in system tab for '%s'\n",
call_nr, system_tab[i].label);
}
call_nr -= KERNEL_CALL;
word= call_nr / bits_per_word;
mask= (1UL << (call_nr % bits_per_word));
if (word >= RSS_NR_SYSTEM)
{
fatal(
"do_system: RSS_NR_SYSTEM is too small (%d needed)\n",
word+1);
}
rs_start.rss_system[word] |= mask;
}
}
PRIVATE void do_driver(config_t *cpe, config_t *config)
{
config_t *cp;
/* At this point we expect one sublist that contains the varios
* resource allocations
*/
if (!(cpe->flags & CFG_SUBLIST))
{
fatal("do_driver: expected list at %s:%d\n",
cpe->file, cpe->line);
}
if (cpe->next != NULL)
{
cpe= cpe->next;
fatal("do_driver: expected end of list at %s:%d\n",
cpe->file, cpe->line);
}
cpe= cpe->list;
/* Process the list */
for (cp= cpe; cp; cp= cp->next)
{
if (!(cp->flags & CFG_SUBLIST))
{
fatal("do_driver: expected list at %s:%d\n",
cp->file, cp->line);
}
cpe= cp->list;
if ((cpe->flags & CFG_STRING) || (cpe->flags & CFG_SUBLIST))
{
fatal("do_driver: expected word at %s:%d\n",
cpe->file, cpe->line);
}
if (strcmp(cpe->word, KW_CLASS) == 0)
{
do_class(cpe->next, config);
continue;
}
if (strcmp(cpe->word, KW_UID) == 0)
{
do_uid(cpe->next);
continue;
}
if (strcmp(cpe->word, KW_NICE) == 0)
{
do_nice(cpe->next);
continue;
}
if (strcmp(cpe->word, KW_IRQ) == 0)
{
do_irq(cpe->next);
continue;
}
if (strcmp(cpe->word, KW_IO) == 0)
{
do_io(cpe->next);
continue;
}
if (strcmp(cpe->word, KW_PCI) == 0)
{
do_pci(cpe->next);
continue;
}
if (strcmp(cpe->word, KW_SYSTEM) == 0)
{
do_system(cpe->next);
continue;
}
if (strcmp(cpe->word, KW_IPC) == 0)
{
do_ipc(cpe->next);
continue;
}
}
}
PRIVATE void do_config(char *label, char *filename)
{
config_t *config, *cp, *cpe;
config= config_read(filename, 0, NULL);
if (config == NULL)
{
fprintf(stderr, "config_read failed for '%s': %s\n",
filename, strerror(errno));
exit(1);
}
/* Find an entry for our driver */
for (cp= config; cp; cp= cp->next)
{
if (!(cp->flags & CFG_SUBLIST))
{
fatal("do_config: expected list at %s:%d\n",
cp->file, cp->line);
}
cpe= cp->list;
if ((cpe->flags & CFG_STRING) || (cpe->flags & CFG_SUBLIST))
{
fatal("do_config: expected word at %s:%d\n",
cpe->file, cpe->line);
}
/* At this place we expect the word 'driver' */
if (strcmp(cpe->word, KW_DRIVER) != 0)
fatal("do_config: exected word '%S' at %s:%d\n",
KW_DRIVER, cpe->file, cpe->line);
cpe= cpe->next;
if ((cpe->flags & CFG_STRING) || (cpe->flags & CFG_SUBLIST))
{
fatal("do_config: expected word at %s:%d\n",
cpe->file, cpe->line);
}
/* At this place we expect the name of the driver */
if (strcmp(cpe->word, label) == 0)
break;
}
if (cp == NULL)
{
fprintf(stderr, "service: driver '%s' not found in config\n",
label);
return;
}
cpe= cpe->next;
do_driver(cpe, config);
}
/* Main program.
*/
PUBLIC int main(int argc, char **argv)
{
message m;
int result;
int request;
int i, s;
char *label, *progname = NULL;
struct passwd *pw;
/* Verify and parse the command line arguments. All arguments are checked
* here. If an error occurs, the problem is reported and exit(2) is called.
* all needed parameters to perform the request are extracted and stored
* global variables.
*/
request = parse_arguments(argc, argv);
if(req_path) {
/* Obtain binary name. */
progname = strrchr(req_path, '/');
assert(progname); /* an absolute path was required */
progname++; /* skip last slash */
}
/* Arguments seem fine. Try to perform the request. Only valid requests
* should end up here. The default is used for not yet supported requests.
*/
switch(request) {
case RS_UP:
case RS_UP_COPY:
/* Build space-separated command string to be passed to RS server. */
strcpy(command, req_path);
command[strlen(req_path)] = ' ';
strcpy(command+strlen(req_path)+1, req_args);
/* Build request message and send the request. */
m.RS_CMD_ADDR = command;
m.RS_CMD_LEN = strlen(command);
m.RS_DEV_MAJOR = req_major;
m.RS_PERIOD = req_period;
if (OK != (s=_taskcall(RS_PROC_NR, request, &m)))
failure(-s);
result = m.m_type;
break;
case RS_START:
/* Build space-separated command string to be passed to RS server. */
strcpy(command, req_path);
command[strlen(req_path)] = ' ';
strcpy(command+strlen(req_path)+1, req_args);
rs_start.rss_cmd= command;
rs_start.rss_cmdlen= strlen(command);
rs_start.rss_major= req_major;
rs_start.rss_period= req_period;
rs_start.rss_script= req_script;
if(req_label) {
rs_start.rss_label = req_label;
rs_start.rss_labellen = strlen(req_label);
} else {
rs_start.rss_label = progname;
rs_start.rss_labellen = strlen(progname);
}
if (req_script)
rs_start.rss_scriptlen= strlen(req_script);
else
rs_start.rss_scriptlen= 0;
pw= getpwnam(DRIVER_LOGIN);
if (pw == NULL)
fatal("no passwd file entry for '%s'", DRIVER_LOGIN);
rs_start.rss_uid= pw->pw_uid;
/* The name of the driver */
(label= strrchr(req_path, '/')) ? label++ : (label= req_path);
if (req_config) {
assert(progname);
do_config(progname, req_config);
}
if (req_ipc)
{
rs_start.rss_ipc= req_ipc+1; /* Skip initial space */
rs_start.rss_ipclen= strlen(rs_start.rss_ipc);
}
else
{
rs_start.rss_ipc= NULL;
rs_start.rss_ipclen= 0;
}
m.RS_CMD_ADDR = (char *) &rs_start;
/* Build request message and send the request. */
if (OK != (s=_taskcall(RS_PROC_NR, request, &m)))
failure(-s);
else if(req_printep)
printf("%d\n", m.RS_ENDPOINT);
result = m.m_type;
break;
case RS_DOWN:
case RS_REFRESH:
case RS_RESTART:
m.RS_CMD_ADDR = req_label;
m.RS_CMD_LEN = strlen(req_label);
if (OK != (s=_taskcall(RS_PROC_NR, request, &m)))
failure(-s);
break;
case RS_SHUTDOWN:
if (OK != (s=_taskcall(RS_PROC_NR, request, &m)))
failure(-s);
break;
default:
print_usage(argv[ARG_NAME], "request is not yet supported");
result = EGENERIC;
}
return(result);
}
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