stat.c revision 1ca8a440323d04164efab68ed8f507f1c6ae84d9 
1/* stat.c : display file or file system status
2 * Copyright 2012 <warior.linux@gmail.com>
3 * Copyright 2013 <anand.sinha85@gmail.com>
4
5USE_STAT(NEWTOY(stat, "c:f", TOYFLAG_BIN))
6
7config STAT
8  bool stat
9  default y
10  help
11    usage: stat [-f] [-c FORMAT] FILE...
12
13    Display status of files or filesystems.
14
15    -f display filesystem status instead of file status
16    -c Output specified FORMAT string instead of default
17
18    The valid format escape sequences for files:
19    %a  Access bits (octal) |%A  Access bits (flags)|%b  Blocks allocated
20    %B  Bytes per block     |%d  Device ID (dec)    |%D  Device ID (hex)
21    %f  All mode bits (hex) |%F  File type          |%g  Group ID
22    %G  Group name          |%h  Hard links         |%i  Inode
23    %n  Filename            |%N  Long filename      |%o  I/O block size
24    %s  Size (bytes)        |%u  User ID            |%U  User name
25    %x  Access time         |%X  Access unix time   |%y  File write time
26    %Y  File write unix time|%z  Dir change time    |%Z  Dir change unix time
27
28    The valid format escape sequences for filesystems:
29    %a  Available blocks    |%b  Total blocks       |%c  Total inodes
30    %d  Free inodes         |%f  Free blocks        |%i  File system ID
31    %l  Max filename length |%n  File name          |%s  Fragment size
32    %S  Best transfer size  |%t  Filesystem type    |%T  Filesystem type name
33*/
34
35#define FOR_stat
36#include "toys.h"
37
38GLOBALS(
39  char *fmt;
40
41  union {
42    struct stat st;
43    struct statfs sf;
44  } stat;
45  struct passwd *user_name;
46  struct group *group_name;
47)
48
49
50// Note: the atime, mtime, and ctime fields in struct stat are the start
51// of embedded struct timespec, but posix won't let them use that
52// struct definition for legacy/namespace reasons.
53
54static void date_stat_format(struct timespec *ts)
55{
56  strftime(toybuf, sizeof(toybuf), "%Y-%m-%d %H:%M:%S",
57    localtime(&(ts->tv_sec)));
58  xprintf("%s.%09d", toybuf, ts->tv_nsec);
59}
60
61static void print_stat(char type)
62{
63  struct stat *stat = (struct stat *)&TT.stat;
64
65  if (type == 'a') xprintf("%lo", stat->st_mode & ~S_IFMT);
66  else if (type == 'A') {
67    char str[11];
68
69    mode_to_string(stat->st_mode, str);
70    xprintf("%s", str);
71  } else if (type == 'b') xprintf("%llu", stat->st_blocks);
72  else if (type == 'B') xprintf("%lu", stat->st_blksize);
73  else if (type == 'd') xprintf("%ldd", stat->st_dev);
74  else if (type == 'D') xprintf("%llxh", stat->st_dev);
75  else if (type == 'f') xprintf("%lx", stat->st_mode);
76  else if (type == 'F') {
77    char *t = "character device\0directory\0block device\0" \
78              "regular file\0symbolic link\0socket\0FIFO (named pipe)";
79    int i, filetype = stat->st_mode & S_IFMT;
80
81    for (i = 1; filetype != (i*8192) && i < 7; i++) t += strlen(t)+1;
82    if (!stat->st_size && filetype == S_IFREG) t = "regular empty file";
83    xprintf("%s", t);
84  } else if (type == 'g') xprintf("%lu", stat->st_gid);
85  else if (type == 'G') xprintf("%8s", TT.group_name->gr_name);
86  else if (type == 'h') xprintf("%lu", stat->st_nlink);
87  else if (type == 'i') xprintf("%llu", stat->st_ino);
88  else if (type == 'N') {
89    xprintf("`%s'", *toys.optargs);
90    if (S_ISLNK(stat->st_mode))
91      if (0<readlink(*toys.optargs, toybuf, sizeof(toybuf)))
92        xprintf(" -> `%s'", toybuf);
93  } else if (type == 'o') xprintf("%lu", stat->st_blksize);
94  else if (type == 's') xprintf("%llu", stat->st_size);
95  else if (type == 'u') xprintf("%lu", stat->st_uid);
96  else if (type == 'U') xprintf("%8s", TT.user_name->pw_name);
97  else if (type == 'x') date_stat_format((void *)&stat->st_atime);
98  else if (type == 'X') xprintf("%llu", (long long)stat->st_atime);
99  else if (type == 'y') date_stat_format((void *)&stat->st_mtime);
100  else if (type == 'Y') xprintf("%llu", (long long)stat->st_mtime);
101  else if (type == 'z') date_stat_format((void *)&stat->st_ctime);
102  else if (type == 'Z') xprintf("%llu", (long long)stat->st_ctime);
103  else xprintf("?");
104}
105
106static void print_statfs(char type) {
107  struct statfs *statfs = (struct statfs *)&TT.stat;
108
109  if (type == 'a') xprintf("%llu", statfs->f_bavail);
110  else if (type == 'b') xprintf("%llu", statfs->f_blocks);
111  else if (type == 'c') xprintf("%llu", statfs->f_files);
112  else if (type == 'd') xprintf("%llu", statfs->f_ffree);
113  else if (type == 'f') xprintf("%llu", statfs->f_bfree);
114  else if (type == 'l') xprintf("%ld", statfs->f_namelen);
115  else if (type == 't') xprintf("%lx", statfs->f_type);
116  else if (type == 'T') {
117    char *s = "unknown";
118    struct {unsigned num; char *name;} nn[] = {
119      {0xADFF, "affs"}, {0x5346544e, "ntfs"}, {0x1Cd1, "devpts"},
120      {0x137D, "ext"}, {0xEF51, "ext2"}, {0xEF53, "ext3"},
121      {0x1BADFACE, "bfs"}, {0x9123683E, "btrfs"}, {0x28cd3d45, "cramfs"},
122      {0x3153464a, "jfs"}, {0x7275, "romfs"}, {0x01021994, "tmpfs"},
123      {0x3434, "nilfs"}, {0x6969, "nfs"}, {0x9fa0, "proc"},
124      {0x534F434B, "sockfs"}, {0x62656572, "sysfs"}, {0x517B, "smb"},
125      {0x4d44, "msdos"}, {0x4006, "fat"}, {0x43415d53, "smackfs"},
126      {0x73717368, "squashfs"}
127    };
128    int i;
129
130    for (i=0; i<ARRAY_LEN(nn); i++)
131      if (nn[i].num == statfs->f_type) s = nn[i].name;
132    xprintf(s);
133  } else if (type == 'i')
134    xprintf("%08x%08x", statfs->f_fsid.__val[0], statfs->f_fsid.__val[1]);
135  else if (type == 's') xprintf("%d", statfs->f_frsize);
136  else if (type == 'S') xprintf("%d", statfs->f_bsize);
137  else xprintf("?");
138}
139
140void stat_main(void)
141{
142  int flagf = toys.optflags & FLAG_f;
143  char *format = flagf
144    ? "  File: \"%n\"\n    ID: %i Namelen: %l    Type: %t\n"
145      "Block Size: %s    Fundamental block size: %S\n"
146      "Blocks: Total: %b\tFree: %f\tAvailable: %a\n"
147      "Inodes: Total: %c\tFree: %d"
148    : "  File: %N\n  Size: %s\t Blocks: %b\t IO Blocks: %B\t%F\n"
149      "Device: %D\t Inode: %i\t Links: %h\n"
150      "Access: (%a/%A)\tUid: (%u/%U)\tGid: (%g/%G)\n"
151      "Access: %x\nModify: %y\nChange: %z";
152
153  if (toys.optflags & FLAG_c) format = TT.fmt;
154
155  for (; *toys.optargs; toys.optargs++) {
156    char *f;
157
158    if (flagf && !statfs(*toys.optargs, (void *)&TT.stat));
159    else if (!flagf && !lstat(*toys.optargs, (void *)&TT.stat)) {
160      struct stat *stat = (struct stat*)&TT.stat;
161
162      // check user and group name
163      TT.user_name = getpwuid(stat->st_uid);
164      TT.group_name = getgrgid(stat->st_gid);
165    } else {
166      perror_msg("'%s'", *toys.optargs);
167      continue;
168    }
169
170    for (f = format; *f; f++) {
171      if (*f != '%') putchar(*f);
172      else {
173        if (*++f == 'n') xprintf("%s", *toys.optargs);
174        else if (flagf) print_statfs(*f);
175        else print_stat(*f);
176      }
177    }
178    xputc('\n');
179  }
180}
181