diff options
Diffstat (limited to 'toys/df.c')
| -rw-r--r-- | toys/df.c | 106 |
1 files changed, 100 insertions, 6 deletions
@@ -2,7 +2,7 @@ /* * df.c - report free disk space. * - * Implemented according to SUSv3: + * Implemented roughly according to SUSv3: * http://www.opengroup.org/onlinepubs/009695399/utilities/df.html * * usage: df [-k] [-P|-t] [file...] @@ -10,16 +10,110 @@ #include "toys.h" +static void show_mt(struct mtab_list *mt) +{ + int len; + long size, used, avail; + uint64_t block; + + // Return if it wasn't found (should never happen, but with /etc/mtab...) + if (!mt) return; + + // If we have -t, skip other filesystem types + if (toy.df.fstype) { + struct string_list *sl; + + for (sl = toy.df.fstype; sl; sl = sl->next) + if (!strcmp(mt->type, sl->str)) break; + if (!sl) return; + } + + // If we don't have -a, skip synthetic filesystems + if (!(toys.optflags & 1) && !mt->statvfs.f_blocks) return; + + // Figure out how much total/used/free space this filesystem has, + // forcing 64-bit math because filesystems are big now. + block = mt->statvfs.f_bsize ? : 1; + + size = (long)((block * mt->statvfs.f_blocks) / toy.df.units); + used = (long)((block * (mt->statvfs.f_blocks-mt->statvfs.f_bfree)) + / toy.df.units); + avail = (long)((block + * (getuid() ? mt->statvfs.f_bavail : mt->statvfs.f_bfree)) + / toy.df.units); + + // Figure out appropriate spacing + len = 25 - strlen(mt->device); + if (len < 1) len = 1; + printf("%s% *ld % 10ld % 9ld % 3ld%% %s\n",mt->device, len, + size, used, avail, 100-(long)((100*(uint64_t)avail)/size), mt->dir); +} + int df_main(void) { - struct mtab_list *mt, *mtlist; + struct mtab_list *mt, *mt2, *mtlist; + char **argv; + + // get_optflags("Pkt:a",&(toy.df.fstype)); + argv = NULL; + + // Handle -P and -k + toy.df.units = 1024; + if (CFG_DF_PEDANTIC && (toys.optflags & 8)) { + // Units are 512 bytes if you select "pedantic" without "kilobytes". + if ((toys.optflags&3) == 1) toy.df.units = 512; + printf("Filesystem %ld-blocks Used Available Capacity Mounted on\n", + toy.df.units); + } else puts("Filesystem\t1K-blocks\tUsed Available Use% Mounted on"); - //int units = 512; mtlist = getmountlist(1); - // Zap overmounts - for (mt = mtlist; mt; mt = mt->next) { - printf("type=%s dir=%s device=%s\n",mt->type,mt->dir,mt->device); + + // If we have a list of filesystems on the command line, loop through them. + if (argv) { + char *next; + + for(next = *argv; *next; next++) { + struct stat st; + + // Stat it (complain if we can't). + if(!stat(next, &st)) { + perror_msg("`%s'", next); + toys.exitval = 1; + continue; + } + + // Find and display this filesystem. Use _last_ hit in case of + // -- bind mounts. + mt2 = NULL; + for (mt = mtlist; mt; mt = mt->next) + if (st.st_dev == mt->stat.st_dev) mt2 = mt; + show_mt(mt2); + } + } else { + // Get and loop through mount list. + + for (mt = mtlist; mt; mt = mt->next) { + struct mtab_list *mt2, *mt3; + + if (!mt->stat.st_dev) continue; + + // Filter out overmounts. + mt3 = mt; + for (mt2 = mt->next; mt2; mt2 = mt2->next) { + if (mt->stat.st_dev == mt2->stat.st_dev) { + // For --bind mounts, take last match + if (!strcmp(mt->device, mt2->device)) mt3 = mt2; + // Filter out overmounts + mt2->stat.st_dev = 0; + } + } + show_mt(mt3); + } } + if (CFG_TOYS_FREE) { + llist_free(mtlist, NULL); + free(argv); + } return 0; } |