Anonymous

// fix-mp3s.c
// Problem: Not exactly sure. It seg faults with a dump.
// I know strtok isn't great to use because it modifies and first arguement, but I don't know how else to do this. I've taken many different approaches and still can't get it working

#include <dirent.h>     // ttye0
#include <stdio.h>      // Displays files with fewer than 2 '-'
#include <string.h>

int main(int argc, char *argv[])
        {
        DIR *d;
        char *ret,*str1;
        int i;
        struct dirent *dir;
        d = opendir(argv[1]);

        if (argc < 2){
        printf("usage: ./fix-mp3s directory (local directory selected)\n");
        argv[1] = ".";
        }

        if (d){
        while ((dir = readdir(d)) != NULL){

        strcpy(str1, dir->d_name);      

                i = 0;
                for ((ret = strtok(str1, "-")); i <= 2; i++){
                        if ((i == 2) && (ret != NULL)){
                        printf("Fix: %s\n", str1);
                        }
                }

                closedir(d);
        }
        }

        return(0);
}


// netinfo.c
// Can I determine the file size before fread? Or can I run a fread on it and just find the size and rerun fread to get the data the second go?
// I want to develop more control over file I/O, this is embarrassing.

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

main(){
FILE *stream;
char buf[20];

if((stream = fopen("/proc/net/dev","r")) == NULL){
        printf("Error: Cannot open /proc/net/dev\n");
        }

fread(buf, 20, 40, stream); // Why can't it see EOF?

printf("%s\n", buf);

fclose(stream);
return 0;
}




// pid-mon.c
// Big problem, easily fixable, unknown solution.
// It's supposed to return pid status, but waitpid only works on child processes...what function do I catch main (what's the term?) process status with?

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <wait.h>

main(int argc, char *argv[]){
struct sigaction sa;
int sigstat,mypid;

if (argc < 2){
        printf("usage: ./pid-mon pid\n");
        exit(1);
        }

        mypid = strtoumax(argv[1],NULL,2);
        if ((waitpid(mypid, &sigstat, WNOHANG)) == -1){
                perror("waitpid");
                exit(1);
        }

        printf("Status: %d\n", sigstat);

} //MAIN