1 /* stat.c : display file or file system status
2  * Copyright 2012 <warior.linux@gmail.com>
3  * Copyright 2013 <anand.sinha85@gmail.com>
4 
5 USE_STAT(NEWTOY(stat, "<1c:fLt", TOYFLAG_BIN))
6 
7 config STAT
8   bool stat
9   default y
10   help
11     usage: stat [-tfL] [-c FORMAT] FILE...
12 
13     Display status of files or filesystems.
14 
15     -c	Output specified FORMAT string instead of default
16     -f	display filesystem status instead of file status
17     -L	Follow symlinks
18     -t	terse (-c "%n %s %b %f %u %g %D %i %h %t %T %X %Y %Z %o")
19     	      (with -f = -c "%n %i %l %t %s %S %b %f %a %c %d")
20 
21     The valid format escape sequences for files:
22     %a  Access bits (octal) |%A  Access bits (flags)|%b  Size/512
23     %B  Bytes per %b (512)  |%d  Device ID (dec)    |%D  Device ID (hex)
24     %f  All mode bits (hex) |%F  File type          |%g  Group ID
25     %G  Group name          |%h  Hard links         |%i  Inode
26     %m  Mount point         |%n  Filename           |%N  Long filename
27     %o  I/O block size      |%s  Size (bytes)       |%t  Devtype major (hex)
28     %T  Devtype minor (hex) |%u  User ID            |%U  User name
29     %x  Access time         |%X  Access unix time   |%y  File write time
30     %Y  File write unix time|%z  Dir change time    |%Z  Dir change unix time
31 
32     The valid format escape sequences for filesystems:
33     %a  Available blocks    |%b  Total blocks       |%c  Total inodes
34     %d  Free inodes         |%f  Free blocks        |%i  File system ID
35     %l  Max filename length |%n  File name          |%s  Fragment size
36     %S  Best transfer size  |%t  FS type (hex)      |%T  FS type (driver name)
37 */
38 
39 #define FOR_stat
40 #include "toys.h"
41 
42 GLOBALS(
43   char *fmt;
44 
45   union {
46     struct stat st;
47     struct statfs sf;
48   } stat;
49   char *file, *pattern;
50   int patlen;
51 )
52 
53 // Force numeric output to long long instead of manually typecasting everything
54 // and safely parse length prefix
out(char c,long long val)55 static void out(char c, long long val)
56 {
57   sprintf(toybuf, "%.*sll%c", TT.patlen, TT.pattern, c);
58   printf(toybuf, val);
59 }
60 
61 // Output string with parsed length prefix
strout(char * val)62 static void strout(char *val)
63 {
64   sprintf(toybuf, "%.*ss", TT.patlen, TT.pattern);
65   printf(toybuf, val);
66 }
67 
date_stat_format(struct timespec * ts)68 static void date_stat_format(struct timespec *ts)
69 {
70   char *s = toybuf+128;
71   strftime(s, sizeof(toybuf)-128, "%Y-%m-%d %H:%M:%S",
72     localtime(&(ts->tv_sec)));
73   sprintf(s+strlen(s), ".%09ld", ts->tv_nsec);
74   strout(s);
75 }
76 
print_stat(char type)77 static void print_stat(char type)
78 {
79   struct stat *stat = (struct stat *)&TT.stat;
80 
81   if (type == 'a') out('o', stat->st_mode&~S_IFMT);
82   else if (type == 'A') {
83     char str[11];
84 
85     mode_to_string(stat->st_mode, str);
86     strout(str);
87   } else if (type == 'b') out('u', stat->st_blocks);
88   else if (type == 'B') out('d', 512);
89   else if (type == 'd') out('d', stat->st_dev);
90   else if (type == 'D') out('x', stat->st_dev);
91   else if (type == 'f') out('x', stat->st_mode);
92   else if (type == 'F') {
93     char *t = "character device\0directory\0block device\0" \
94               "regular file\0symbolic link\0socket\0FIFO (named pipe)";
95     int i, filetype = stat->st_mode & S_IFMT;
96 
97     for (i = 1; filetype != (i*8192) && i < 7; i++) t += strlen(t)+1;
98     if (!stat->st_size && filetype == S_IFREG) t = "regular empty file";
99     strout(t);
100   } else if (type == 'g') out('u', stat->st_gid);
101   else if (type == 'G') strout(getgroupname(stat->st_gid));
102   else if (type == 'h') out('u', stat->st_nlink);
103   else if (type == 'i') out('u', stat->st_ino);
104   else if (type == 'm') {
105     struct mtab_list *mt = xgetmountlist(0);
106     dev_t dev = stat->st_rdev ? stat->st_rdev : stat->st_dev;
107 
108     // This mount point could exist multiple times, so show oldest.
109     for (dlist_terminate(mt); mt; mt = mt->next) if (mt->stat.st_dev == dev) {
110       strout(mt->dir);
111       break;
112     }
113     llist_traverse(mt, free);
114   } else if (type == 'N') {
115     xprintf("`%s'", TT.file);
116     if (S_ISLNK(stat->st_mode))
117       if (readlink0(TT.file, toybuf, sizeof(toybuf)))
118         xprintf(" -> `%s'", toybuf);
119   } else if (type == 'o') out('u', stat->st_blksize);
120   else if (type == 's') out('u', stat->st_size);
121   else if (type == 't') out('x', dev_major(stat->st_rdev));
122   else if (type == 'T') out('x', dev_minor(stat->st_rdev));
123   else if (type == 'u') out('u', stat->st_uid);
124   else if (type == 'U') strout(getusername(stat->st_uid));
125   else if (type == 'x') date_stat_format(&stat->st_atim);
126   else if (type == 'X') out('u', stat->st_atime);
127   else if (type == 'y') date_stat_format(&stat->st_mtim);
128   else if (type == 'Y') out('u', stat->st_mtime);
129   else if (type == 'z') date_stat_format(&stat->st_ctim);
130   else if (type == 'Z') out('u', stat->st_ctime);
131   else xprintf("?");
132 }
133 
print_statfs(char type)134 static void print_statfs(char type) {
135   struct statfs *statfs = (struct statfs *)&TT.stat;
136 
137   if (type == 'a') out('u', statfs->f_bavail);
138   else if (type == 'b') out('u', statfs->f_blocks);
139   else if (type == 'c') out('u', statfs->f_files);
140   else if (type == 'd') out('u', statfs->f_ffree);
141   else if (type == 'f') out('u', statfs->f_bfree);
142   else if (type == 'l') out('d', statfs->f_namelen);
143   else if (type == 't') out('x', statfs->f_type);
144   else if (type == 'T') {
145     char *s = "unknown";
146     struct {unsigned num; char *name;} nn[] = {
147       {0xADFF, "affs"}, {0x5346544e, "ntfs"}, {0x1Cd1, "devpts"},
148       {0x137D, "ext"}, {0xEF51, "ext2"}, {0xEF53, "ext3"},
149       {0x1BADFACE, "bfs"}, {0x9123683E, "btrfs"}, {0x28cd3d45, "cramfs"},
150       {0x3153464a, "jfs"}, {0x7275, "romfs"}, {0x01021994, "tmpfs"},
151       {0x3434, "nilfs"}, {0x6969, "nfs"}, {0x9fa0, "proc"},
152       {0x534F434B, "sockfs"}, {0x62656572, "sysfs"}, {0x517B, "smb"},
153       {0x4d44, "msdos"}, {0x4006, "fat"}, {0x43415d53, "smackfs"},
154       {0x73717368, "squashfs"}
155     };
156     int i;
157 
158     for (i=0; i<ARRAY_LEN(nn); i++)
159       if (nn[i].num == statfs->f_type) s = nn[i].name;
160     strout(s);
161   } else if (type == 'i') {
162     char buf[32];
163 
164     sprintf(buf, "%08x%08x", statfs->f_fsid.__val[0], statfs->f_fsid.__val[1]);
165     strout(buf);
166   } else if (type == 's') out('d', statfs->f_frsize);
167   else if (type == 'S') out('d', statfs->f_bsize);
168   else strout("?");
169 }
170 
stat_main(void)171 void stat_main(void)
172 {
173   int flagf = toys.optflags & FLAG_f, i;
174   char *format, *f;
175 
176   if (toys.optflags&FLAG_t) {
177     format = flagf ? "%n %i %l %t %s %S %b %f %a %c %d" :
178                      "%n %s %b %f %u %g %D %i %h %t %T %X %Y %Z %o";
179   } else format = flagf
180     ? "  File: \"%n\"\n    ID: %i Namelen: %l    Type: %t\n"
181       "Block Size: %s    Fundamental block size: %S\n"
182       "Blocks: Total: %b\tFree: %f\tAvailable: %a\n"
183       "Inodes: Total: %c\tFree: %d"
184     : "  File: %N\n  Size: %s\t Blocks: %b\t IO Blocks: %B\t%F\n"
185       "Device: %Dh/%dd\t Inode: %i\t Links: %h\n"
186       "Access: (%a/%A)\tUid: (%5u/%8U)\tGid: (%5g/%8G)\n"
187       "Access: %x\nModify: %y\nChange: %z";
188 
189   if (toys.optflags & FLAG_c) format = TT.fmt;
190 
191   for (i = 0; toys.optargs[i]; i++) {
192     int L = toys.optflags & FLAG_L;
193 
194     TT.file = toys.optargs[i];
195     if (flagf && !statfs(TT.file, (void *)&TT.stat));
196     else if (flagf || (L ? stat : lstat)(TT.file, (void *)&TT.stat)) {
197       perror_msg("'%s'", TT.file);
198       continue;
199     }
200 
201     for (f = format; *f; f++) {
202       if (*f != '%') putchar(*f);
203       else {
204         f = next_printf(f, &TT.pattern);
205         TT.patlen = f-TT.pattern;
206         if (TT.patlen>99) error_exit("bad %s", TT.pattern);
207         if (*f == 'n') strout(TT.file);
208         else if (flagf) print_statfs(*f);
209         else print_stat(*f);
210       }
211     }
212     xputc('\n');
213   }
214 }
215