179 lines
4.8 KiB
C
179 lines
4.8 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <time.h>
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#include <utmp.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/stat.h>
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/* examine and fix utmp entries. Note that the code for fixing entries
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is not complete, and indeed does nothing at all at this time. No bug
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reports, please, as I am still actively working on this. It is not
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here for general use, but only so that I can ferret out any bugs that
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exist on other peoples systems without having to log in to their systems
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myself ;-) */
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int main (int argc, char **argv) {
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FILE *ut; /* /var/run/utmp */
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struct utmp uts; /* utmp record */
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char user[UT_NAMESIZE + 1];
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char host[17];
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char ch;
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int print_all = 0, list = 0, fix = 0;
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/* get options */
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while ((ch = getopt(argc, argv, "laf")) != EOF)
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switch (ch) {
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case 'a':
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print_all = 1;
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break;
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case 'l':
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list = 1;
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break;
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case 'f':
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fix = 1;
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break;
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}
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/* check argument options */
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if ( (!list && !print_all && !fix)) {
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fprintf(stderr, "You must specify a command line option:\n\tl = list\n\
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\tf = fix\n\ta = all (requires l or f)\n");
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exit(1);
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}
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if (list) {
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ut = fopen(UTMP_FILE, "r");
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while (fread(&uts, sizeof(uts), 1, ut))
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if (((uts.ut_type == USER_PROCESS) && (uts.ut_name[0] != '\000'))
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|| print_all) {
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strncpy(user, uts.ut_user, UT_NAMESIZE);
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user[UT_NAMESIZE]=0;
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strncpy(host, uts.ut_host, 16);
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host[16]=0;
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printf("ut_type: %d\n", uts.ut_type);
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printf("ut_pid: %d\n", uts.ut_pid);
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printf("ut_line: %s\n", uts.ut_line);
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printf("ut_id: %2s\n", uts.ut_id);
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printf("ut_time: %d\n", uts.ut_time);
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printf("ut_user: %s\n", user);
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printf("ut_host: %s\n", host);
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printf("ut_addr: %d\n\n", uts.ut_addr);
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}
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fclose(ut);
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}
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if (fix) {
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ut = fopen(UTMP_FILE, "r");
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while (fread(&uts, sizeof(uts), 1, ut))
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if (((uts.ut_type == USER_PROCESS) && (uts.ut_name[0] != '\000'))
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|| print_all) {
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/* Display entry in utmp */
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strncpy(user, uts.ut_user, UT_NAMESIZE);
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user[UT_NAMESIZE]=0;
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strncpy(host, uts.ut_host, 16);
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host[16]=0;
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printf("ut_type: %d\n", uts.ut_type);
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printf("ut_pid: %d\n", uts.ut_pid);
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printf("ut_line: %s\n", uts.ut_line);
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printf("ut_id: %s2\n", uts.ut_id);
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printf("ut_time: %d\n", uts.ut_time);
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printf("ut_user: %s\n", user);
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printf("ut_host: %s\n", host);
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printf("ut_addr: %d\n\n", uts.ut_addr);
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printf("Modify this record? (y/N): "); fflush(stdout);
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/* Ask if to delete or no */
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if ((ch = getchar()) == 'y' || ch == 'Y') {
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while (getchar() != '\n');
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printf("Change ut_type? "); fflush(stdout);
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if ((ch = getchar()) == 'y' || ch == 'Y') {
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while (getchar() != '\n');
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printf("INIT, LOGIN, USER, or DEAD_PROCESS? (I/L/U/D): ");
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fflush(stdout);
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ch = getchar();
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switch (ch) {
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case 'i':
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case 'I':
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uts.ut_type = INIT_PROCESS;
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break;
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case 'l':
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case 'L':
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uts.ut_type = LOGIN_PROCESS;
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break;
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case 'u':
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case 'U':
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uts.ut_type = USER_PROCESS;
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break;
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case 'd':
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case 'D':
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uts.ut_type = DEAD_PROCESS;
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break;
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default:
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printf("Invalid choice: %c\n", ch);
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}
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if (ch != '\n') while ((ch = getchar()) != '\n');
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}
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if (ch != '\n') while ((ch = getchar()) != '\n');
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printf("Change ut_id field? (y/N): "); fflush(stdout);
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if ((ch = getchar()) == 'y' || ch == 'Y') {
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while (getchar() != '\n');
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printf("Please enter the two characters for ut_id: ");
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fflush(stdout);
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uts.ut_id[0] = getchar();
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uts.ut_id[1] = getchar();
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while ((ch = getchar()) != '\n');
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}
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if (ch != '\n') while ((ch = getchar()) != '\n');
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printf("Change the ut_user field? (y/N): "); fflush(stdout);
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if ((ch = getchar()) == 'y' || ch == 'Y') {
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int i;
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while (getchar() != '\n');
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printf("Please enter the new ut_name, up to %c characters: ",
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UT_NAMESIZE);
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fflush(stdout);
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for (i=0; i<UT_NAMESIZE; i++) {
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ch = getchar();
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uts.ut_user[i] = (ch != '\n') ? ch : i = UT_NAMESIZE, (char) 0;
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}
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}
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if (ch != '\n') while ((ch = getchar()) != '\n');
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printf("Change the ut_host field? (y/N): "); fflush(stdout);
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if ((ch = getchar()) == 'y' || ch == 'Y') {
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int i;
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while (getchar() != '\n');
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printf("Please enter the new ut_host, up to 16 characters: ");
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fflush(stdout);
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for (i=0; i<16; i++) {
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ch = getchar();
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uts.ut_user[i] = (ch != '\n') ? ch : i = 16, (char) 0;
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}
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if (ch != '\n') while ((ch = getchar()) != '\n');
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}
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/* Here go the changes...*/
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/* utmpname(UTMP_FILE);
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setutent();
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pututline(&uts);
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endutent(); */
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/* But they don't work... */
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}
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if (ch != '\n') while ((ch = getchar()) != '\n');
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/* here we should write the utmp entry */
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}
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fclose(ut);
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}
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return 0;
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}
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