first commit

src/coreutils/df/df.c

@@ -0,0 +1,95 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <errno.h>
+#include <unistd.h>
+#include <mntent.h>
+#include <sys/statvfs.h>
+#include "human.h"
+#include "config.h"
+
+char a_flag;
+char h_flag;
+off_t block = 1024;
+
+int main(int argc, char **argv) {
+
+	int opt;
+	while ((opt = getopt(argc, argv, "hHka")) != -1) {
+		switch (opt) {
+			case 'h':
+				h_flag = 1;
+				break;
+
+			case 'H':
+				h_flag = 1;
+				block = 1000;
+				break;
+
+			case 'a':
+				a_flag = 1;
+				break;
+
+			default:
+				printf("df [rHa]\n\t-h Human readable (1024)\n\t-a Show all\n\t-H Human readable (1000)\n");
+				return 0;
+		}
+	}
+
+	FILE *fp = setmntent("/proc/mounts", "r");
+	if (fp == NULL) {
+		fprintf(stderr, "df: %s\n", strerror(errno));
+		return 1;
+	}
+
+	if (h_flag)
+		puts("Filesystem                 Size      Used Available Use% Mounted on");
+
+	else
+		puts("Filesystem                   Size         Used    Available          Use% Mounted on");
+
+
+	int ret = 0;
+	struct mntent *me;
+	struct statvfs disk;
+
+	while ((me = getmntent(fp)) != NULL) {
+		if (!strcmp(me->mnt_fsname, "none"))
+			continue;
+
+		if (statvfs(me->mnt_dir, &disk) < 0) {
+			ret = 1;
+			continue;
+		}
+
+		if (!a_flag)
+			if (!strcmp(me->mnt_fsname, "/dev/root") || disk.f_blocks == 0)
+				continue;
+
+		off_t bs = disk.f_frsize / block;
+		off_t total = disk.f_blocks * bs;
+		off_t avail = disk.f_bfree * bs;
+		off_t used = total - avail;
+		off_t capacity = (used * 100 + 1) / (avail + used + 1);
+
+		if (!h_flag)
+			printf("%-20s %12jd %12jd %12jd %12jd%% %s\n", me->mnt_fsname, total, used, avail, capacity, me->mnt_dir);
+
+		else {
+			char total_s[MU_HUMAN_BUF_SIZE + 1];
+			char used_s[MU_HUMAN_BUF_SIZE + 1];
+			char avail_s[MU_HUMAN_BUF_SIZE + 1];
+
+			snprintf(total_s, sizeof(total_s), "%s", mu_humansize(total * block, block));
+			snprintf(used_s, sizeof(used_s), "%s", mu_humansize(used * block, block));
+			snprintf(avail_s, sizeof(avail_s), "%s", mu_humansize(avail * block, block));
+
+			printf("%-20s %10s %9s %9s %3jd%% %s\n", me->mnt_fsname, total_s, used_s, avail_s, capacity, me->mnt_dir);
+		}
+	}
+
+	endmntent(fp);
+	return ret;
+}
+