kopia lustrzana https://github.com/sp9skp/spdxl
93 wiersze
2.0 KiB
C
93 wiersze
2.0 KiB
C
/*
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* dxlAPRS toolchain
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*
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* Copyright (C) Christian Rabler <oe5dxl@oevsv.at>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <sys/types.h>
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#include <time.h>
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#include <fcntl.h>
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#include <utmp.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <signal.h>
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#include <stdio.h>
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#include <sys/wait.h>
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int logout1(int pid, char *line)
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{
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int fd;
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struct utmp ut;
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if ((fd = open(_PATH_UTMP, O_RDWR, 0)) < 0) return 0;
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while (read(fd, &ut, sizeof(struct utmp)) == sizeof(struct utmp)) {
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if(ut.ut_pid!=pid) continue;
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strncpy(line, ut.ut_line, UT_LINESIZE);
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bzero(ut.ut_name, UT_NAMESIZE);
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bzero(ut.ut_host, UT_HOSTSIZE);
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time(&ut.ut_time);
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lseek(fd, -(off_t)sizeof(struct utmp), L_INCR);
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write(fd, &ut, sizeof(struct utmp));
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close(fd);
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return 1;
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}
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close(fd);
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return 0;
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}
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void logwtmp(const char *line, const char *name, const char *host)
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{
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struct utmp ut;
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struct stat buf;
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int fd;
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if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0) return;
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if (fstat(fd, &buf) == 0) {
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ut.ut_pid = getpid();
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ut.ut_type = (name[0] != '\0')? USER_PROCESS : DEAD_PROCESS;
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strncpy(ut.ut_id, "", 2);
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strncpy(ut.ut_line, line, sizeof(ut.ut_line));
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strncpy(ut.ut_name, name, sizeof(ut.ut_name));
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strncpy(ut.ut_host, host, sizeof(ut.ut_host));
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time(&ut.ut_time);
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if (write(fd, &ut, sizeof(struct utmp)) != sizeof(struct utmp))
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ftruncate(fd, buf.st_size);
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}
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close(fd);
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}
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#define DEVPATH "/dev/"
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void cleanup(int sig) {
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int status, pid;
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char line[UT_LINESIZE+sizeof(DEVPATH)];
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if(sig!=SIGCHLD) return;
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while( (pid=waitpid(-1, &status, WNOHANG /* |WUNTRACED */ )) > 0 ) {
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/*
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if(WIFSTOPPED(status)) {
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fprintf(stderr,"process %d stopped by signal %d!\n",
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pid, WSTOPSIG(status));
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continue;
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}
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*/
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sprintf(line,DEVPATH);
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if( logout1(pid, line+sizeof(DEVPATH)-1) ) {
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logwtmp(line+sizeof(DEVPATH)-1, "", "");
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chmod(line, 0666);
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chown(line, 0, 0);
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line[sizeof(DEVPATH)-1]='p'; /* ttyXX -> ptyXX */
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chmod(line, 0666);
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chown(line, 0, 0);
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}
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}
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}
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