Listing 3: kill.c
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/* 
 * kill.c -- C version of kill logging script
 * Copyright 1994 by Steven G. Isaacson
 */

#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <time.h>

/* log file name */
char *logname="/usr/spool/log/kill.log";

main(argc, argv)
int argc;
char *argv[];
{
    FILE *fp;
    int i, pid;
    char *cwd;
    time_t now;

    /* 
     * check for error opening the log file, but don't
     * stop people from working just because there is a
     * problem with the log file.
     */

    if ((fp=fopen(logname, "a+")) != NULL ) {

        /* log who is doing what where */
    
        fprintf(fp, "\n" );
        if (time(&now) == -1)
            fprintf(fp,"time not available\n");
        else
            fprintf(fp,"%s", ctime(&now));
    
        fprintf(fp,
          "getlogin=%s uid=%d euid=%d gid=%d egid=%d cuserid=%s\n", 
          getlogin(), getuid(), geteuid(), getgid(), getegid(),
          cuserid(NULL));

        fprintf(fp,"%s=%s ", "HOME", getenv("HOME"));
        fprintf(fp,"%s=%s\n", "NAME", getenv("NAME"));
        fprintf(fp, "cwd=%s\n", getcwd((char *)NULL, 64));
    
        for (i=0; i < argc; i++)
            fprintf(fp, "%s ", argv[i]);
        fprintf(fp, "\n");

        for ( i=1; i < argc; i++ ) {
    
            pid=atoi(argv[i]);
    
            /* if kill level (-9,-15, etc.) was specified,
             * skip it
             */
            if ( pid < 0 )
                continue;
    
            plog(fp, pid); 
        }
        fflush(fp);
    }

    /* now call the real kill program */
    execvp("/bin/rkill", argv);
}

/* ================================================= */
/* write pid info to log file using a pipe           */

plog(fp, pid)
FILE *fp;
int pid;
{
    char cmd[50], buf[256];
    FILE *ptr;

    sprintf(cmd, "/bin/ps -lfp %d", pid);

    if ((ptr = popen(cmd, "r")) != NULL)
        while (fgets(buf, sizeof(buf), ptr) != NULL)
            (void) fprintf(fp, "%s ",buf);
    pclose(ptr);
    return;
}

/* ================================================= */

