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- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <errno.h>
- #include <sys/statfs.h>
- static int ok = EXIT_SUCCESS;
- static void printsize(long long n)
- {
- char unit = 'K';
- long long t;
- n *= 10;
- if (n > 1024*1024*10) {
- n /= 1024;
- unit = 'M';
- }
- if (n > 1024*1024*10) {
- n /= 1024;
- unit = 'G';
- }
- t = (n + 512) / 1024;
- printf("%4lld.%1lld%c", t/10, t%10, unit);
- }
- static void df(char *s, int always) {
- struct statfs st;
- if (statfs(s, &st) < 0) {
- fprintf(stderr, "%s: %s\n", s, strerror(errno));
- ok = EXIT_FAILURE;
- } else {
- if (st.f_blocks == 0 && !always)
- return;
- printf("%-20s ", s);
- printsize((long long)st.f_blocks * (long long)st.f_bsize);
- printf(" ");
- printsize((long long)(st.f_blocks - (long long)st.f_bfree) * st.f_bsize);
- printf(" ");
- printsize((long long)st.f_bfree * (long long)st.f_bsize);
- printf(" %d\n", (int) st.f_bsize);
- }
- }
- int main(int argc, char *argv[]) {
- printf("Filesystem Size Used Free Blksize\n");
- if (argc == 1) {
- char s[2000];
- FILE *f = fopen("/proc/mounts", "r");
- while (fgets(s, 2000, f)) {
- char *c, *e = s;
- for (c = s; *c; c++) {
- if (*c == ' ') {
- e = c + 1;
- break;
- }
- }
- for (c = e; *c; c++) {
- if (*c == ' ') {
- *c = '\0';
- break;
- }
- }
- df(e, 0);
- }
- fclose(f);
- } else {
- int i;
- for (i = 1; i < argc; i++) {
- df(argv[i], 1);
- }
- }
- exit(ok);
- }
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