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79#include <mntent.h>
80#include <sys/statvfs.h>
81#include "libbb.h"
82#include "unicode.h"
83
84#if !ENABLE_FEATURE_HUMAN_READABLE
85static unsigned long kscale(unsigned long b, unsigned long bs)
86{
87 return (b * (unsigned long long) bs + 1024/2) / 1024;
88}
89#endif
90
91int df_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
92int df_main(int argc UNUSED_PARAM, char **argv)
93{
94 unsigned long df_disp_hr = 1024;
95 int status = EXIT_SUCCESS;
96 unsigned opt;
97 FILE *mount_table;
98 struct mntent *mount_entry;
99 struct statvfs s;
100
101 enum {
102 OPT_KILO = (1 << 0),
103 OPT_POSIX = (1 << 1),
104 OPT_FSTYPE = (1 << 2),
105 OPT_ALL = (1 << 3) * ENABLE_FEATURE_DF_FANCY,
106 OPT_INODE = (1 << 4) * ENABLE_FEATURE_DF_FANCY,
107 OPT_BSIZE = (1 << 5) * ENABLE_FEATURE_DF_FANCY,
108 OPT_HUMAN = (1 << (3 + 3*ENABLE_FEATURE_DF_FANCY)) * ENABLE_FEATURE_HUMAN_READABLE,
109 OPT_MEGA = (1 << (4 + 3*ENABLE_FEATURE_DF_FANCY)) * ENABLE_FEATURE_HUMAN_READABLE,
110 };
111 const char *disp_units_hdr = NULL;
112 char *chp;
113
114 init_unicode();
115
116 opt = getopt32(argv, "^"
117 "kPT"
118 IF_FEATURE_DF_FANCY("aiB:")
119 IF_FEATURE_HUMAN_READABLE("hm")
120 "\0"
121#if ENABLE_FEATURE_HUMAN_READABLE && ENABLE_FEATURE_DF_FANCY
122 "k-mB:m-Bk:B-km"
123#elif ENABLE_FEATURE_HUMAN_READABLE
124 "k-m:m-k"
125#endif
126 IF_FEATURE_DF_FANCY(, &chp)
127 );
128 if (opt & OPT_MEGA)
129 df_disp_hr = 1024*1024;
130
131 if (opt & OPT_BSIZE) {
132
133 int i;
134 for (i = 0; kmg_i_suffixes[i].suffix[0]; i++) {
135 if (strcmp(kmg_i_suffixes[i].suffix, chp) == 0) {
136 df_disp_hr = kmg_i_suffixes[i].mult;
137 goto got_it;
138 }
139 }
140
141 df_disp_hr = xatoul_range_sfx(chp, 1, ULONG_MAX, kmg_i_suffixes);
142 got_it: ;
143 }
144
145
146
147
148
149 if (getenv("POSIXLY_CORRECT"))
150 df_disp_hr = 512;
151
152 if (opt & OPT_HUMAN) {
153 df_disp_hr = 0;
154 disp_units_hdr = " Size";
155 }
156 if (opt & OPT_INODE)
157 disp_units_hdr = " Inodes";
158
159 if (disp_units_hdr == NULL) {
160#if ENABLE_FEATURE_HUMAN_READABLE
161 disp_units_hdr = xasprintf("%s-blocks",
162
163
164 make_human_readable_str(df_disp_hr, 0, !!(opt & OPT_POSIX))
165 );
166#else
167 disp_units_hdr = xasprintf("%lu-blocks", df_disp_hr);
168#endif
169 }
170
171 printf("Filesystem %s%-15sUsed Available %s Mounted on\n",
172 (opt & OPT_FSTYPE) ? "Type " : "",
173 disp_units_hdr,
174 (opt & OPT_POSIX) ? "Capacity" : "Use%");
175
176 mount_table = NULL;
177 argv += optind;
178 if (!argv[0]) {
179 mount_table = setmntent(bb_path_mtab_file, "r");
180 if (!mount_table)
181 bb_perror_msg_and_die(bb_path_mtab_file);
182 }
183
184 while (1) {
185 const char *device;
186 const char *mount_point;
187 const char *fs_type;
188
189 if (mount_table) {
190 mount_entry = getmntent(mount_table);
191 if (!mount_entry) {
192 endmntent(mount_table);
193 break;
194 }
195 } else {
196 mount_point = *argv++;
197 if (!mount_point)
198 break;
199 mount_entry = find_mount_point(mount_point, 1);
200 if (!mount_entry) {
201 bb_error_msg("%s: can't find mount point", mount_point);
202 set_error:
203 status = EXIT_FAILURE;
204 continue;
205 }
206 }
207
208 device = mount_entry->mnt_fsname;
209
210
211 if (ENABLE_FEATURE_SKIP_ROOTFS && strcmp(device, "rootfs") == 0)
212 continue;
213
214 mount_point = mount_entry->mnt_dir;
215 fs_type = mount_entry->mnt_type;
216
217 if (statvfs(mount_point, &s) != 0) {
218 bb_simple_perror_msg(mount_point);
219 goto set_error;
220 }
221
222
223
224 if (s.f_frsize == 0)
225 s.f_frsize = s.f_bsize;
226
227 if ((s.f_blocks > 0) || !mount_table || (opt & OPT_ALL)) {
228 unsigned long long blocks_used;
229 unsigned long long blocks_total;
230 unsigned blocks_percent_used;
231
232 if (opt & OPT_INODE) {
233 s.f_blocks = s.f_files;
234 s.f_bavail = s.f_bfree = s.f_ffree;
235 s.f_frsize = 1;
236 if (df_disp_hr)
237 df_disp_hr = 1;
238 }
239 blocks_used = s.f_blocks - s.f_bfree;
240 blocks_total = blocks_used + s.f_bavail;
241 blocks_percent_used = blocks_total;
242 if (blocks_total != 0) {
243
244 unsigned u;
245 while (blocks_total >= INT_MAX / 101) {
246 blocks_total >>= 1;
247 blocks_used >>= 1;
248 }
249 u = (unsigned)blocks_used * 100u + (unsigned)blocks_total / 2;
250 blocks_percent_used = u / (unsigned)blocks_total;
251 }
252
253#ifdef WHY_WE_DO_IT_FOR_DEV_ROOT_ONLY
254 if (strcmp(device, "/dev/root") == 0) {
255
256
257 device = find_block_device("/");
258 if (!device) {
259 goto set_error;
260 }
261 }
262#endif
263
264#if ENABLE_UNICODE_SUPPORT
265 {
266 uni_stat_t uni_stat;
267 char *uni_dev = unicode_conv_to_printable(&uni_stat, device);
268 if (uni_stat.unicode_width > 20 && !(opt & OPT_POSIX)) {
269 printf("%s\n%20s", uni_dev, "");
270 } else {
271 printf("%s%*s", uni_dev, 20 - (int)uni_stat.unicode_width, "");
272 }
273 free(uni_dev);
274 if (opt & OPT_FSTYPE) {
275 char *uni_type = unicode_conv_to_printable(&uni_stat, fs_type);
276 if (uni_stat.unicode_width > 10 && !(opt & OPT_POSIX))
277 printf(" %s\n%31s", uni_type, "");
278 else
279 printf(" %s%*s", uni_type, 10 - (int)uni_stat.unicode_width, "");
280 free(uni_type);
281 }
282 }
283#else
284 if (printf("\n%-20s" + 1, device) > 20 && !(opt & OPT_POSIX))
285 printf("\n%-20s", "");
286 if (opt & OPT_FSTYPE) {
287 if (printf(" %-10s", fs_type) > 11 && !(opt & OPT_POSIX))
288 printf("\n%-30s", "");
289 }
290#endif
291
292#if ENABLE_FEATURE_HUMAN_READABLE
293 printf(" %9s ",
294
295
296 make_human_readable_str(s.f_blocks, s.f_frsize, df_disp_hr));
297
298 printf(" %9s " + 1,
299
300
301 make_human_readable_str((s.f_blocks - s.f_bfree),
302 s.f_frsize, df_disp_hr));
303
304 printf("%9s %3u%% %s\n",
305
306
307 make_human_readable_str(s.f_bavail, s.f_frsize, df_disp_hr),
308 blocks_percent_used, mount_point);
309#else
310 printf(" %9lu %9lu %9lu %3u%% %s\n",
311 kscale(s.f_blocks, s.f_frsize),
312 kscale(s.f_blocks - s.f_bfree, s.f_frsize),
313 kscale(s.f_bavail, s.f_frsize),
314 blocks_percent_used, mount_point);
315#endif
316 }
317 }
318
319 return status;
320}
321