annotate toys/posix/df.c @ 689:c29e69a0e85e

On 32 bit platforms %ld doesn't match uint64_t, so do long long and %lld (rather than deal with verbose PRIu64 nonsense).
author Rob Landley <rob@landley.net>
date Sat, 10 Nov 2012 18:24:14 -0600
parents 598263aee2b9
children 786841fdb1e0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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233
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1 /* vi: set sw=4 ts=4:
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2 *
2
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3 * df.c - report free disk space.
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4 *
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5 * Copyright 2006 Rob Landley <rob@landley.net>
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6 *
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7 * See http://opengroup.org/onlinepubs/9699919799/utilities/df.html
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8
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9 USE_DF(NEWTOY(df, "Pkt*a", TOYFLAG_USR|TOYFLAG_SBIN))
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10
233
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11 config DF
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12 bool "df (disk free)"
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13 default y
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14 help
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15 usage: df [-t type] [FILESYSTEM ...]
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16
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17 The "disk free" command, df shows total/used/available disk space for
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18 each filesystem listed on the command line, or all currently mounted
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19 filesystems.
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20
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21 -t type
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22 Display only filesystems of this type.
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23
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24 config DF_PEDANTIC
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25 bool "options -P and -k"
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26 default y
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27 depends on DF
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28 help
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29 usage: df [-Pk]
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30
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31 -P The SUSv3 "Pedantic" option
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32
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33 Provides a slightly less useful output format dictated by
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34 the Single Unix Specification version 3, and sets the
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35 units to 512 bytes instead of the default 1024 bytes.
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36
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37 -k Sets units back to 1024 bytes (the default without -P)
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38 */
2
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39
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40 #define FOR_df
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41 #include "toys.h"
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42
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43 GLOBALS(
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44 struct arg_list *fstype;
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45
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46 long units;
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47 )
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48
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49 static void show_mt(struct mtab_list *mt)
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50 {
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51 int len;
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52 long long size, used, avail, percent, block;
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53 char *device;
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54
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55 // Return if it wasn't found (should never happen, but with /etc/mtab...)
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56 if (!mt) return;
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57
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58 // If we have -t, skip other filesystem types
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59 if (TT.fstype) {
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60 struct arg_list *al;
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61
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62 for (al = TT.fstype; al; al = al->next) {
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63 if (!strcmp(mt->type, al->arg)) break;
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64 }
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65 if (!al) return;
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66 }
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67
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68 // If we don't have -a, skip synthetic filesystems
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69 if (!(toys.optflags & FLAG_a) && !mt->statvfs.f_blocks) return;
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70
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71 // Figure out how much total/used/free space this filesystem has,
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72 // forcing 64-bit math because filesystems are big now.
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73 block = mt->statvfs.f_bsize ? mt->statvfs.f_bsize : 1;
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74 size = (block * mt->statvfs.f_blocks) / TT.units;
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75 used = (block * (mt->statvfs.f_blocks-mt->statvfs.f_bfree)) / TT.units;
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76 avail = (block * (getuid() ? mt->statvfs.f_bavail : mt->statvfs.f_bfree))
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77 / TT.units;
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78 if (!(used+avail)) percent = 0;
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79 else {
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80 percent = (used*100)/(used+avail);
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81 if (used*100 != percent*(used+avail)) percent++;
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82 }
7
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83
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84 device = *mt->device == '/' ? realpath(mt->device, NULL) : NULL;
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85 if (!device) device = mt->device;
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86
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87 // Figure out appropriate spacing
681
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88 len = 25 - strlen(device);
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89 if (len < 1) len = 1;
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90 if (CFG_DF_PEDANTIC && (toys.optflags & FLAG_P)) {
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91 xprintf("%s %lld %lld %lld %lld%% %s\n", device, size, used, avail,
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92 percent, mt->dir);
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93 } else {
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94 xprintf("%s% *lld % 10lld % 9lld % 3lld%% %s\n", device, len,
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95 size, used, avail, percent, mt->dir);
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96 }
681
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97
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98 if (device != mt->device) free(device);
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99 }
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100
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101 void df_main(void)
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102 {
7
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103 struct mtab_list *mt, *mt2, *mtlist;
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104
7
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105 // Handle -P and -k
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106 TT.units = 1024;
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107 if (CFG_DF_PEDANTIC && (toys.optflags & FLAG_P)) {
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108 // Units are 512 bytes if you select "pedantic" without "kilobytes".
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109 if ((toys.optflags&(FLAG_P|FLAG_k)) == FLAG_P) TT.units = 512;
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110 printf("Filesystem %ld-blocks Used Available Capacity Mounted on\n",
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111 TT.units);
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112 } else puts("Filesystem\t1K-blocks\tUsed Available Use% Mounted on");
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113
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114 mtlist = getmountlist(1);
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115
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116 // If we have a list of filesystems on the command line, loop through them.
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117 if (*toys.optargs) {
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118 char **next;
7
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119
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120 for(next = toys.optargs; *next; next++) {
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121 struct stat st;
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122
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123 // Stat it (complain if we can't).
27
c471910a14e4 Fix thinko (inverted test).
Rob Landley <rob@landley.net>
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124 if(stat(*next, &st)) {
164
c79290b54bd3 Fix error message
Charlie Shepherd <masterdriverz@gentoo.org>
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125 perror_msg("`%s'", *next);
7
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126 toys.exitval = 1;
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127 continue;
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128 }
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129
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130 // Find and display this filesystem. Use _last_ hit in case of
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landley@driftwood
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131 // -- bind mounts.
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landley@driftwood
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132 mt2 = NULL;
681
44904c7212e7 Follow symlinks to get actual device name, getmountlist() reverses order for us now, detect stdout to full device.
Rob Landley <rob@landley.net>
parents: 674
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133 for (mt = mtlist; mt; mt = mt->next) {
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parents: 674
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134 if (st.st_dev == mt->stat.st_dev) {
44904c7212e7 Follow symlinks to get actual device name, getmountlist() reverses order for us now, detect stdout to full device.
Rob Landley <rob@landley.net>
parents: 674
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135 mt2 = mt;
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Rob Landley <rob@landley.net>
parents: 674
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136 break;
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parents: 674
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137 }
44904c7212e7 Follow symlinks to get actual device name, getmountlist() reverses order for us now, detect stdout to full device.
Rob Landley <rob@landley.net>
parents: 674
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138 }
7
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landley@driftwood
parents: 2
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139 show_mt(mt2);
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landley@driftwood
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140 }
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landley@driftwood
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141 } else {
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landley@driftwood
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142 // Get and loop through mount list.
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landley@driftwood
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143
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
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144 for (mt = mtlist; mt; mt = mt->next) {
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landley@driftwood
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145 struct mtab_list *mt2, *mt3;
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landley@driftwood
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146
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 2
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147 if (!mt->stat.st_dev) continue;
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landley@driftwood
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148
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landley@driftwood
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149 // Filter out overmounts.
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landley@driftwood
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150 mt3 = mt;
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151 for (mt2 = mt->next; mt2; mt2 = mt2->next) {
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landley@driftwood
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152 if (mt->stat.st_dev == mt2->stat.st_dev) {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
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153 // For --bind mounts, take last match
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
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154 if (!strcmp(mt->device, mt2->device)) mt3 = mt2;
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landley@driftwood
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155 // Filter out overmounts
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landley@driftwood
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156 mt2->stat.st_dev = 0;
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landley@driftwood
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157 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
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158 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
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159 show_mt(mt3);
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160 }
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents: 1
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161 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
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162
624
1e8b9acdafeb Genericize llist code a bit: rename llist_free() to llist_traverse(), and no longer accept NULL as a synonym for free.
Rob Landley <rob@landley.net>
parents: 560
diff changeset
163 if (CFG_TOYBOX_FREE) llist_traverse(mtlist, free);
1
59d58fab67c6 Next snapshot. Tries to grab something out of lib in order to build, I have
landley@driftwood
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164 }