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ls.c
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ls.c
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//
// Created by Pulak Malhotra on 31/08/20.
//
#include "headers.h"
#include "util.h"
#include "ls.h"
char *month_name(int no, char *name) {
no += 1;
switch (no) {
case 1:
strcpy(name, "Jan");
break;
case 2:
strcpy(name, "Feb");
break;
case 3:
strcpy(name, "Mar");
break;
case 4:
strcpy(name, "Apr");
break;
case 5:
strcpy(name, "May");
break;
case 6:
strcpy(name, "Jun");
break;
case 7:
strcpy(name, "Jul");
break;
case 8:
strcpy(name, "Aug");
break;
case 9:
strcpy(name, "Sep");
break;
case 10:
strcpy(name, "Oct");
break;
case 11:
strcpy(name, "Nov");
break;
case 12:
strcpy(name, "Dec");
break;
default:
break;
}
return name;
}
void permission_format(int mode, char *permission) {
int i;
int index = 0;
for (i = 8; i >= 0; i--) {
int t = 1 << i;
if (mode & t) {
if (i % 3 == 0) {
permission[index] = 'x';
} else if (i % 3 == 1) {
permission[index] = 'w';
} else {
permission[index] = 'r';
}
} else {
permission[index] = '-';
}
index++;
}
permission[index] = '\0';
}
void detail_print(const char *add, char *name, int detail) {
struct stat data;
//printf("%s", add);
if (lstat(add, &data) == -1) {
fprintf(stderr, "%s\n", add);
exit_code = 1;
perror("Error getting stat struct");
return;
}
int links = data.st_nlink;
struct passwd *pws = getpwuid(data.st_uid);
char *user_name = pws->pw_name;
struct group *grp = getgrgid(data.st_gid);
char *group_name = grp->gr_name;
long long bytes = data.st_size;
time_t l_m = data.st_mtime;
struct tm last_mod;
localtime_r(&l_m, &last_mod);
int month = last_mod.tm_mon;
int day = last_mod.tm_mday;
int min = last_mod.tm_min;
int hour = last_mod.tm_hour;
char permission[100];
char perm[100];
if(data.st_mode & S_IXUSR){
//printGreen();
}
if (data.st_mode & S_IFDIR) {
strcpy(permission, "d");
//printBlue();
} else if (S_ISLNK(data.st_mode)) {
strcpy(permission, "l");
//printYellow();
} else{
strcpy(permission, "-");
}
if (!detail) {
printf("%s\n", name);
//resetColor();
return;
}
permission_format(data.st_mode, perm);
char monthName[5];
month_name(month, monthName);
strcat(permission, perm);
printf("%s%5d%10s%10s%10lld %s %02d %02d:%02d %s\n", permission, links, user_name, group_name, bytes,
monthName, day,
hour, min, name);
//resetColor();
}
void sort_names(char name[][size_buff], int n) {
char temp[size_buff];
int i, j;
for (i = 0; i < n - 1; i++) {
for (j = i + 1; j < n; j++) {
if (strcmp(name[i], name[j]) > 0) {
strcpy(temp, name[i]);
strcpy(name[i], name[j]);
strcpy(name[j], temp);
}
}
}
}
void print_ls_data(const char *location, int hidden, int details, int file, char *outName, int detail) {
struct dirent *dir_stuff;
if (strcmp(outName, "") != 0 && detail)
printf("%s :\n", outName);
if (file == 1) {
// if (details)
detail_print(location, outName, details);
// else
// printf("%s\n", outName);
return;
}
int total_blocks = 0;
DIR *dir = opendir(location);
int total = 0;
while (readdir(dir) != NULL) {
total++;
}
closedir(dir);
char names[total][size_buff];
dir = opendir(location);
int count = 0;
while ((dir_stuff = readdir(dir)) != NULL) {
strcpy(names[count], dir_stuff->d_name);
count++;
if (!hidden && (dir_stuff->d_name[0] == '.'))
continue;
char element_address[size_buff];
strcpy(element_address, location);
strcat(element_address, dir_stuff->d_name);
struct stat data;
//printf("%s", add);
if (stat(element_address, &data) == -1) {
fprintf(stderr, "%s\n", element_address);
perror("Error getting stat struct");
exit_code = 1;
continue;
}
total_blocks += data.st_blocks;
}
sort_names(names, total);
if (details)
printf("total %d\n", total_blocks / 2);
for (int i = 0; i < total; i++) {
char *curr_name = names[i];
if (curr_name[0] == '.' && hidden == 0) {
continue;
}
/* if (!details)
printf("%s\n", curr_name);
else {*/
char element_address[size_buff];
strcpy(element_address, location);
strcat(element_address, curr_name);
detail_print(element_address, curr_name, details);
}
closedir(dir);
free(dir_stuff);
//free(names);
}
// ls @ +
void ls_handler(char *tokens[], int no, const char *curr_dir, const char *home_dir) {
char location[size_buff];
int hidden = 0, details = 0;
int dir[no + 1];
int dirs = 0;
for (int i = 1; i < no; i++) {
if (tokens[i][0] == '-') {
for (int j = 1; j < strlen(tokens[i]); j++) {
if (tokens[i][j] == 'l')
details = 1;
else if (tokens[i][j] == 'a')
hidden = 1;
else {
exit_code = 1;
fprintf(stderr, "ls : invalid flag only l and a supported\n");
return;
}
}
} else {
dir[dirs] = i;
dirs++;
}
}
int detail = 1;
if (dirs == 0) {
detail = 0;
tokens[no] = strdup(".");
dir[dirs] = no;
dirs++;
}
for (int j = 0; j < dirs; j++) {
int i = dir[j];
get_raw_address(location, tokens[i]);
struct stat stats_dir;
//printf("%s", location);
if (stat(location, &stats_dir) == 0 && (S_IFDIR & stats_dir.st_mode)) {
if (location[strlen(location) - 1] != '/')
strcat(location, "/");
print_ls_data(location, hidden, details, 0, tokens[i], detail);
} else if (S_IFREG & stats_dir.st_mode) {
print_ls_data(location, hidden, details, 1, tokens[i], detail);
} else {
exit_code = 1;
fprintf(stderr, "ls : No such file or directory\n");
}
//printf("\n");
}
}