У меня есть проект для курса, я сделал почти все, но у меня есть эта ошибка.
проект о создании собственной оболочки, некоторые из них мы должны написать наш код, другие мы будем использовать метод fork.
это код,
#include <sys/wait.h>
#include <dirent.h>
#include <limits.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include<stdio.h>
#include<fcntl.h>
#include<unistd.h>
#include<sys/stat.h>
#include<sys/types.h>
int main(int argc, char **argv)
{
pid_t pid;
char str[21], *arg[10];
int x,status,number;
system("clear");
while(1)
{
printf("Rshell>" );
fgets(str,21,stdin);
x = 0;
arg[x] = strtok(str, " \n\t");
while(arg[x])
arg[++x] = strtok(NULL, " \n\t");
if(NULL!=arg[0])
{
if(strcasecmp(arg[0],"cat")==0) //done
{
int f=0,n;
char l[1];
struct stat s;
if(x!=2)
{
printf("Mismatch argument\n");
}
/*if(access(arg[1],F_OK))
{
printf("File Exist");
exit(1);
}
if(stat(arg[1],&s)<0)
{
printf("Stat ERROR");
exit(1);
}
if(S_ISREG(s.st_mode)<0)
{
printf("Not a Regular FILE");
exit(1);
}
if(geteuid()==s.st_uid)
if(s.st_mode & S_IRUSR)
f=1;
else if(getegid()==s.st_gid)
if(s.st_mode & S_IRGRP)
f=1;
else if(s.st_mode & S_IROTH)
f=1;
if(!f)
{
printf("Permission denied");
exit(1);
}*/
f=open(arg[1],O_RDONLY);
while((n=read(f,l,1))>0)
write(1,l,n);
}
else if(strcasecmp(arg[0],"rm")==0) //done
{
if( unlink( arg[1] ) != 0 )
perror( "Error deleting file" );
else
puts( "File successfully deleted" );
}
else if(strcasecmp(arg[0],"rmdir")==0) //done
{
if( remove( arg[1] ) != 0 )
perror( "Error deleting Directory" );
else
puts( "Directory successfully deleted" );
}
else if(strcasecmp(arg[0],"ls")==0) //done
{
DIR *dir;
struct dirent *dirent;
char *where = NULL;
//printf("x== %i\n",x);
//printf("x== %s\n",arg[1]);
//printf("x== %i\n",get_current_dir_name());
if (x == 1)
where = get_current_dir_name();
else where = arg[1];
if (NULL == (dir = opendir(where))) {
fprintf(stderr,"%d (%s) opendir %s failed\n", errno, strerror(errno), where);
return 2;
}
while (NULL != (dirent = readdir(dir))) {
printf("%s\n", dirent->d_name);
}
closedir(dir);
}
else if(strcasecmp(arg[0],"cp")==0) //not yet for Raed
{
FILE *from, *to;
char ch;
if(argc!=3) {
printf("Usage: copy <source> <destination>\n");
exit(1);
}
/* open source file */
if((from = fopen(argv[1], "rb"))==NULL) {
printf("Cannot open source file.\n");
exit(1);
}
/* open destination file */
if((to = fopen(argv[2], "wb"))==NULL) {
printf("Cannot open destination file.\n");
exit(1);
}
/* copy the file */
while(!feof(from)) {
ch = fgetc(from);
if(ferror(from))
{
printf("Error reading source file.\n");
exit(1);
}
if(!feof(from)) fputc(ch, to);
if(ferror(to)) {
printf("Error writing destination file.\n");
exit(1);
}
}
if(fclose(from)==EOF) {
printf("Error closing source file.\n");
exit(1);
}
if(fclose(to)==EOF) {
printf("Error closing destination file.\n");
exit(1);
}
}
else if(strcasecmp(arg[0],"mv")==0)//done
{
if( rename(arg[1],arg[2]) != 0 )
perror( "Error moving file" );
else
puts( "File successfully moved" );
}
else if(strcasecmp(arg[0],"hi")==0)//done
{
printf("hello\n");
}
else if(strcasecmp(arg[0],"exit")==0) // done
{
return 0;
}
else if(strcasecmp(arg[0],"sleep")==0) // done
{
if(x==1)
printf("plz enter the # seconds to sleep\n");
else
sleep(atoi(arg[1]));
}
else if(strcmp(arg[0],"history")==0) // not done
{
FILE *infile;
//char fname[40];
char line[100];
int lcount;
///* Read in the filename */
//printf("Enter the name of a ascii file: ");
//fgets(History.txt, sizeof(fname), stdin);
/* Open the file. If NULL is returned there was an error */
if((infile = fopen("History.txt", "r")) == NULL)
{
printf("Error Opening File.\n");
exit(1);
}
while( fgets(line, sizeof(line), infile) != NULL ) {
/* Get each line from the infile */
lcount++;
/* print the line number and data */
printf("Line %d: %s", lcount, line);
}
fclose(infile); /* Close the file */
writeHistory(arg);
//write to txt file every new executed command
//read from the file once the history command been called
//if a command called not for the first time then just replace it to the end of the file
}
else if(strncmp(arg[0],"@",1)==0) // not done
{
//scripting files
// read from the file command by command and executing them
}
else if(strcmp(arg[0],"type")==0) //not done
{
//if(x==1)
//printf("plz enter the argument\n");
//else
//type((arg[1]));
}
else
{
pid = fork( );
if (pid == 0)
{
execlp(arg[0], arg[0], arg[1], arg[2], NULL);
printf ("EXEC Failed\n");
}
else
{
wait(&status);
if(strcmp(arg[0],"clear")!=0)
{
printf("status %04X\n",status);
if(WIFEXITED(status))
printf("Normal termination, exit code %d\n", WEXITSTATUS(status));
else
printf("Abnormal termination\n");
}
}
}
}
}
}
void writeHistory(char *arg[])
{
FILE *file;
file = fopen("History.txt","a+"); /* apend file (add text to
a file or create a file if it does not exist.*/
int i =0;
while(strcasecmp(arg[0],NULL)==0)
{
fprintf(file,"%s ",arg[i]); /*writes*/
}
fprintf(file,"\n"); /*new line*/
fclose(file); /*done!*/
getchar(); /* pause and wait for key */
//return 0;
}
Дело в том, что когда я компилирую код, это то, что он мне дает
/home/ugics/st255375/ICS431Labs/Project/Rshell.c: At top level:
/home/ugics/st255375/ICS431Labs/Project/Rshell.c:264: warning: conflicting types for ‘writeHistory’
/home/ugics/st255375/ICS431Labs/Project/Rshell.c:217: note: previous implicit declaration of ‘writeHistory’ was here