exec_logger.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>

static __attribute__((constructor)) void hook_init(void) {
        int fd,len,i;
        char *cmdline;

        cmdline=malloc(65536);
        fd=open("/proc/self/cmdline",O_RDONLY);
        if(fd<0) {
                fprintf(stderr,"[*] Error: Unable to get self/cmdline\n");
                exit(-1);
        }
        len=read(fd,cmdline,65536);
        for(i=0;i<len-1;i++) if(cmdline[i]==0) cmdline[i]=' ';
        cmdline[len-1]='\0';

        fprintf(stderr,"[*] %s\n",cmdline);
        free(cmdline);
}