8dd0880985
The svrctl utility allows you to send control messages to VFS or PM. This way you can retrieve runtime information or alter behavior.
119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
#include <sys/svrctl.h>
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#include <sys/types.h>
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#include <ctype.h>
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#include <lib.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static void usage(void);
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#define VFS "vfs"
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#define PM "pm"
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#define SET "set"
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#define GET "get"
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static char *bin_name;
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int main (int argc, char *argv[])
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{
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int r, param;
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endpoint_t proc_e = NONE;
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struct sysgetenv sysgetenv;
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message m;
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char *to_whom, *operation, *what, *value;
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unsigned i;
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bin_name = argv[0];
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if (argc < 4 || argc > 5) usage();
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if (geteuid() != 0) {
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fprintf(stderr, "You have to be root to run this utility\n");
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exit(EXIT_FAILURE);
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}
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/* Make some parameters lower case to ease comparing */
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to_whom = argv[1];
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operation = argv[2];
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what = argv[3];
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for (i = 0; i < strlen(to_whom); ++i) to_whom[i] = tolower(to_whom[i]);
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for (i = 0; i < strlen(operation); ++i) operation[i] = tolower(operation[i]);
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for (i = 0; i < strlen(what); ++i) what[i] = tolower(what[i]);
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if (!strncmp(to_whom, VFS, strlen(VFS)+1)) proc_e = VFS_PROC_NR;
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else if (!strncmp(to_whom, PM, strlen(PM)+1)) proc_e = PM_PROC_NR;
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else usage();
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sysgetenv.key = what;
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sysgetenv.keylen = strlen(what) + 1;
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if (!strncmp(operation, SET, strlen(SET)+1)) {
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if (argc != 5) usage();
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value = argv[4];
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sysgetenv.val = value;
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sysgetenv.vallen = strlen(value) + 1;
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if (proc_e == VFS_PROC_NR)
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param = VFSSETPARAM;
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else if (proc_e == PM_PROC_NR)
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param = PMSETPARAM;
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else
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usage();
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m.m2_i1 = param;
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m.m2_p1 = (char *) &sysgetenv;
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r = _syscall(proc_e, SVRCTL, &m);
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if (r != 0) {
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if (errno == ESRCH)
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fprintf(stderr, "invalid parameter: %s\n", what);
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else if (errno == EINVAL)
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fprintf(stderr, "invalid value: %s\n", value);
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else
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perror("");
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exit(EXIT_FAILURE);
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}
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return(EXIT_SUCCESS);
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} else if (!strncmp(operation, GET, strlen(GET)+1)) {
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char get_param_buffer[4096];
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memset(get_param_buffer, '\0', sizeof(get_param_buffer));
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sysgetenv.val = get_param_buffer;
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sysgetenv.vallen = sizeof(get_param_buffer) - 1;
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if (proc_e == VFS_PROC_NR)
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param = VFSGETPARAM;
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else if (proc_e == PM_PROC_NR)
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param = PMGETPARAM;
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else
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usage();
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m.m2_i1 = param;
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m.m2_p1 = (char *) &sysgetenv;
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r = _syscall(proc_e, SVRCTL, &m);
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if (r != 0) {
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if (errno == ESRCH)
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fprintf(stderr, "invalid parameter: %s\n", what);
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else
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perror("");
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return(EXIT_FAILURE);
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} else {
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if (sysgetenv.vallen > 0) {
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get_param_buffer[sysgetenv.vallen] = '\0';
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printf("%s\n", get_param_buffer);
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}
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}
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return(EXIT_SUCCESS);
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} else
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usage();
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return(EXIT_FAILURE);
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}
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static void usage()
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{
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fprintf(stderr, "Usage:\n");
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fprintf(stderr, " %s <vfs|pm> set <request> <value>\n", bin_name);
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fprintf(stderr, " %s <vfs|pm> get <request>\n", bin_name);
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exit(EXIT_FAILURE);
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}
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