micro-utils/coreutils/du.c
2023-10-29 12:27:44 +03:00

133 lines
2.2 KiB
C

#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/stat.h>
unsigned int h_flag;
unsigned int s_flag;
unsigned int b_flag;
unsigned int m_flag;
void print(double size, const char *filename) {
char c = 0;
if (h_flag) {
if (size < 1048576)
c = 'K';
else if (size < 1073741824) {
size = size / 1048576;
c = 'M';
}
else if (size < 1099511627776) {
size = size / 1073741824;
c = 'G';
}
}
/* Kb */
else if (!b_flag)
size = size / 1024;
/* Mb */
else if (m_flag)
size = size / 1048576;
printf("%.1f%c\t%s\n", size, c, filename);
}
double du(const char *path, int recurs_flag) {
double sum = 0;
struct stat sb;
if (lstat(path, &sb) != 0) {
fprintf(stderr, "du: lstat() %s\n", strerror(errno));
return 0;
}
if (S_ISDIR(sb.st_mode)) {
DIR *dp = opendir(path);
if (!dp) {
fprintf(stderr, "du: %s\n", strerror(errno));
return 0;
}
struct dirent *ep;
while ((ep = readdir(dp)) != NULL) {
if (!strcmp(ep->d_name, ".") || !strcmp(ep->d_name, ".."))
continue;
size_t len = strlen(path) + strlen(ep->d_name) + 2;
char *new_path = malloc(len + 1);
if (new_path == NULL)
continue;
snprintf(new_path, len, "%s/%s", path, ep->d_name);
sum += du(new_path, 1);
free(new_path);
}
closedir(dp);
if (!s_flag && recurs_flag) {
print(sum, path);
return sum;
}
/* Silent mode */
else if (!recurs_flag)
print(sum, path);
}
else {
sum = sb.st_size;
if (!recurs_flag)
print(sum, path);
}
return sum;
}
int main(const int argc, const char **argv) {
int i;
for (i = 1; i < argc; i++) {
if (argv[i][0] != '-')
break;
else if (!strcmp(argv[i], "-h"))
h_flag = 1;
else if (!strcmp(argv[i], "-s"))
s_flag = 1;
else if (!strcmp(argv[i], "-b"))
b_flag = 1;
else if (!strcmp(argv[i], "-m")) {
b_flag = 1;
m_flag = 1;
}
else if (!strcmp(argv[i], "--help")) {
printf("du [-h (Sizes in human readable format (e.g., 1K 243M 2G))] [-s (Display only a total for each argument)] [-b (Apparent size)] [-m (Size in megabyte)] [file file2...]\n");
return 0;
}
}
if (argc - i == 0)
du(".", 0);
else
for (; i < argc; i++)
du(argv[i], 0);
return 0;
}