* Copyright 2013 Kyungwan Han <asura321@gmail.com>
*
* See http://opengroup.org/onlinepubs/9699919799/utilities/dd.html
+
USE_DD(NEWTOY(dd, NULL, TOYFLAG_USR|TOYFLAG_BIN))
config DD
bool "dd"
default n
- help
+ help
usage: dd [if=FILE] [of=FILE] [ibs=N] [obs=N] [bs=N] [count=N] [skip=N]
- [seek=N] [conv=notrunc|noerror|sync|fsync]
+ [seek=N] [conv=notrunc|noerror|sync|fsync] [status=noxfer|none]
Options:
if=FILE Read from FILE instead of stdin
conv=noerror Continue after read errors
conv=sync Pad blocks with zeros
conv=fsync Physically write data out before finishing
+ status=noxfer Don't show transfer rate
+ status=none Don't show transfer rate or records in/out
- Numbers may be suffixed by c (x1), w (x2), b (x512), kD (x1000), k (x1024),
- MD (x1000000), M (x1048576), GD (x1000000000) or G (x1073741824)
- Copy a file, converting and formatting according to the operands.
+ Numbers may be suffixed by c (*1), w (*2), b (*512), kD (*1000), k (*1024),
+ MD (*1000*1000), M (*1024*1024), GD (*1000*1000*1000) or G (*1024*1024*1024).
*/
+
#define FOR_dd
#include "toys.h"
GLOBALS(
- int sig;
-)
+ int show_xfer;
+ int show_records;
+ unsigned long long bytes, c_count, in_full, in_part, out_full, out_part;
+ struct timeval start;
+ struct {
+ char *name;
+ int fd;
+ unsigned char *buff, *bp;
+ long sz, count;
+ unsigned long long offset;
+ } in, out;
+);
+
#define C_CONV 0x0000
#define C_BS 0x0001
#define C_COUNT 0x0002
#define C_FSYNC 0x0200
#define C_NOERROR 0x0400
#define C_NOTRUNC 0x0800
-
-struct io {
- char *name;
- int fd;
- unsigned char *buff, *bp;
- long sz, count;
- unsigned long long offset;
-};
-
-struct iostat {
- unsigned long long in_full, in_part, out_full, out_part, bytes;
- struct timeval start;
-};
+#define C_STATUS 0x1000
struct pair {
char *name;
static struct pair operands[] = {
// keep the array sorted by name, bsearch() can be used.
- { "bs", C_BS },
- { "conv", C_CONV },
- { "count", C_COUNT},
- { "ibs", C_IBS },
- { "if", C_IF },
- { "obs", C_OBS },
- { "of", C_OF },
- { "seek", C_SEEK },
- { "skip", C_SKIP },
+ { "bs", C_BS },
+ { "conv", C_CONV },
+ { "count", C_COUNT },
+ { "ibs", C_IBS },
+ { "if", C_IF },
+ { "obs", C_OBS },
+ { "of", C_OF },
+ { "seek", C_SEEK },
+ { "skip", C_SKIP },
+ { "status", C_STATUS},
};
-static struct io in, out;
-static struct iostat st;
-static unsigned long long c_count;
-
-static unsigned long long strsuftoll(char* arg, int def, unsigned long long max)
+static unsigned long long strsuftoll(char *arg, int def, unsigned long long max)
{
unsigned long long result;
- char *endp, *ch = arg;
+ char *p = arg;
int i, idx = -1;
- errno = 0;
- while (isspace(*ch)) ch++;
- if (*ch == '-') error_exit("invalid number '%s'",arg);
- result = strtoull(arg, &endp, 10);
+ while (isspace(*p)) p++;
+ if (*p == '-') error_exit("invalid number '%s'", arg);
+
+ errno = 0;
+ result = strtoull(p, &p, 0);
if (errno == ERANGE || result > max || result < def)
- perror_exit("invalid number '%s'",arg);
- if (*endp != '\0') {
+ perror_exit("invalid number '%s'", arg);
+ if (*p != '\0') {
for (i = 0; i < ARRAY_LEN(suffixes); i++)
- if (!strcmp(endp, suffixes[i].name)) idx = i;
+ if (!strcmp(p, suffixes[i].name)) idx = i;
if (idx == -1 || (max/suffixes[idx].val < result))
- error_exit("invalid number '%s'",arg);
- result = result* suffixes[idx].val;
+ error_exit("invalid number '%s'", arg);
+ result *= suffixes[idx].val;
}
return result;
}
-static void summary()
+static void status()
{
- double seconds = 5.0;
+ double seconds;
struct timeval now;
gettimeofday(&now, NULL);
- seconds = ((now.tv_sec * 1000000 + now.tv_usec) - (st.start.tv_sec * 1000000
- + st.start.tv_usec))/1000000.0;
- //out to STDERR
- fprintf(stderr,"%llu+%llu records in\n%llu+%llu records out\n", st.in_full, st.in_part,
- st.out_full, st.out_part);
- human_readable(toybuf, st.bytes, HR_SPACE|HR_B);
- fprintf(stderr, "%llu bytes (%s) copied, ",st.bytes, toybuf);
- human_readable(toybuf, st.bytes/seconds, HR_SPACE|HR_B);
- fprintf(stderr, "%f s, %s/s\n", seconds, toybuf);
-}
-
-static void sig_handler(int sig)
-{
- TT.sig = sig;
+ seconds = ((now.tv_sec * 1000000 + now.tv_usec) -
+ (TT.start.tv_sec * 1000000 + TT.start.tv_usec))/1000000.0;
+
+ if (TT.show_records)
+ fprintf(stderr, "%llu+%llu records in\n%llu+%llu records out\n",
+ TT.in_full, TT.in_part, TT.out_full, TT.out_part);
+
+ if (TT.show_xfer) {
+ human_readable(toybuf, TT.bytes, HR_SPACE|HR_B);
+ fprintf(stderr, "%llu bytes (%s) copied, ", TT.bytes, toybuf);
+ human_readable(toybuf, TT.bytes/seconds, HR_SPACE|HR_B);
+ fprintf(stderr, "%f s, %s/s\n", seconds, toybuf);
+ }
}
static int xmove_fd(int fd)
static void setup_inout()
{
- ssize_t n;
-
/* for C_BS, in/out is done as it is. so only in.sz is enough.
* With Single buffer there will be overflow in a read following partial read
*/
- in.buff = out.buff = xmalloc(in.sz + ((toys.optflags & C_BS)? 0: out.sz));
- in.bp = out.bp = in.buff;
- atexit(summary);
+ TT.in.buff = TT.out.buff = xmalloc(TT.in.sz + ((toys.optflags & C_BS)? 0: TT.out.sz));
+ TT.in.bp = TT.out.bp = TT.in.buff;
//setup input
- if (!in.name) {
- in.name = "stdin";
- in.fd = STDIN_FILENO;
+ if (!TT.in.name) {
+ TT.in.name = "stdin";
+ TT.in.fd = STDIN_FILENO;
} else {
- in.fd = xopen(in.name, O_RDONLY);
- in.fd = xmove_fd(in.fd);
+ TT.in.fd = xopen(TT.in.name, O_RDONLY);
+ TT.in.fd = xmove_fd(TT.in.fd);
}
//setup outout
- if (!out.name) {
- out.name = "stdout";
- out.fd = STDOUT_FILENO;
+ if (!TT.out.name) {
+ TT.out.name = "stdout";
+ TT.out.fd = STDOUT_FILENO;
} else {
- out.fd = xcreate(out.name, O_WRONLY | O_CREAT, 0666);
- out.fd = xmove_fd(out.fd);
+ int flags = O_WRONLY|O_CREAT;
+ if (!(toys.optflags&C_NOTRUNC)) flags |= O_TRUNC;
+ TT.out.fd = xcreate(TT.out.name, flags, 0666);
+ TT.out.fd = xmove_fd(TT.out.fd);
}
- if (in.offset) {
- if (lseek(in.fd, (off_t)(in.offset * in.sz), SEEK_CUR) < 0) {
- while (in.offset--) {
- if ((n = read(in.fd, in.bp, in.sz)) < 0) {
- if (toys.optflags & C_NOERROR) { //warn message and summary
- error_msg("%s: read error", in.name);
- summary();
- } else perror_exit("%s: read error", in.name);
+ if (TT.in.offset) {
+ if (lseek(TT.in.fd, (off_t)(TT.in.offset * TT.in.sz), SEEK_CUR) < 0) {
+ while (TT.in.offset--) {
+ ssize_t n = read(TT.in.fd, TT.in.bp, TT.in.sz);
+
+ if (n < 0) {
+ if (toys.optflags & C_NOERROR) { //warn message and status
+ error_msg("%s: read error", TT.in.name);
+ status();
+ } else perror_exit("%s: read error", TT.in.name);
} else if (!n) {
- xprintf("%s: Can't skip\n", in.name);
+ xprintf("%s: Can't skip\n", TT.in.name);
exit(0);
}
}
}
}
- if (out.offset) xlseek(out.fd, (off_t)(out.offset * out.sz), SEEK_CUR);
+ if (TT.out.offset) xlseek(TT.out.fd, (off_t)(TT.out.offset * TT.out.sz), SEEK_CUR);
}
static void write_out(int all)
{
- ssize_t nw;
- out.bp = out.buff;
- while (out.count) {
- nw = writeall(out.fd, out.bp, ((all)? out.count : out.sz));
- all = 0; //further writes will be on obs
- if (nw <= 0) perror_exit("%s: write error",out.name);
- if (nw == out.sz) st.out_full++;
- else st.out_part++;
- out.count -= nw;
- out.bp += nw;
- st.bytes += nw;
- if (out.count < out.sz) break;
- }
- if (out.count) memmove(out.buff, out.bp, out.count); //move remainder to front
-}
-
-static void do_dd(void)
-{
- ssize_t n;
- struct sigaction sa;
-
- memset(&sa, 0, sizeof(sa));
- sa.sa_handler = sig_handler;
- sigaction(SIGINT, &sa, NULL);
- sigaction(SIGUSR1, &sa, NULL);
- setup_inout();
- gettimeofday(&st.start, NULL);
-
- if (toys.optflags & (C_OF | C_SEEK) && !(toys.optflags & C_NOTRUNC))
- ftruncate(out.fd, (off_t)out.offset * out.sz);
-
- while (!(toys.optflags & C_COUNT) || (st.in_full + st.in_part) < c_count) {
- if (TT.sig == SIGUSR1) {
- summary();
- TT.sig = 0;
- } else if (TT.sig == SIGINT) exit(TT.sig | 128);
- in.bp = in.buff + in.count;
- if (toys.optflags & C_SYNC) memset(in.bp, 0, in.sz);
- if (!(n = read(in.fd, in.bp, in.sz))) break;
- if (n < 0) {
- if (errno == EINTR) continue;
- //read error case.
- perror_msg("%s: read error", in.name);
- if (!(toys.optflags & C_NOERROR)) exit(1);
- summary();
- xlseek(in.fd, in.sz, SEEK_CUR);
- if (!(toys.optflags & C_SYNC)) continue;
- // if SYNC, then treat as full block of nuls
- n = in.sz;
- }
- if (n == in.sz) {
- st.in_full++;
- in.count += n;
- } else {
- st.in_part++;
- if (toys.optflags & C_SYNC) in.count += in.sz;
- else in.count += n;
- }
-
- out.count = in.count;
- if (toys.optflags & C_BS) {
- write_out(1);
- in.count = 0;
- continue;
- }
+ TT.out.bp = TT.out.buff;
+ while (TT.out.count) {
+ ssize_t nw = writeall(TT.out.fd, TT.out.bp, ((all)? TT.out.count : TT.out.sz));
- if (in.count >= out.sz) {
- write_out(0);
- in.count = out.count;
- }
+ all = 0; //further writes will be on obs
+ if (nw <= 0) perror_exit("%s: write error", TT.out.name);
+ if (nw == TT.out.sz) TT.out_full++;
+ else TT.out_part++;
+ TT.out.count -= nw;
+ TT.out.bp += nw;
+ TT.bytes += nw;
+ if (TT.out.count < TT.out.sz) break;
}
- if (out.count) write_out(1); //write any remaining input blocks
- if (toys.optflags & C_FSYNC && fsync(out.fd) < 0)
- perror_exit("%s: fsync fail", out.name);
-
- close(in.fd);
- close(out.fd);
- if (in.buff) free(in.buff);
+ if (TT.out.count) memmove(TT.out.buff, TT.out.bp, TT.out.count); //move remainder to front
}
static int comp(const void *a, const void *b) //const to shut compiler up
char *arg;
long sz;
- in.sz = out.sz = 512; //default io block size
+ TT.show_xfer = TT.show_records = 1;
+
+ TT.in.sz = TT.out.sz = 512; //default io block size
while (*toys.optargs) {
if (!(arg = strchr(*toys.optargs, '='))) error_exit("unknown arg %s", *toys.optargs);
*arg++ = '\0';
comp))) error_exit("unknown arg %s", key.name);
toys.optflags |= res->val;
- switch(res->val) {
+ switch (res->val) {
case C_BS:
- in.sz = out.sz = strsuftoll(arg, 1, LONG_MAX);
+ TT.in.sz = TT.out.sz = strsuftoll(arg, 1, LONG_MAX);
break;
case C_IBS:
sz = strsuftoll(arg, 1, LONG_MAX);
- if (!(toys.optflags & C_BS)) in.sz = sz;
+ if (!(toys.optflags & C_BS)) TT.in.sz = sz;
break;
case C_OBS:
sz = strsuftoll(arg, 1, LONG_MAX);
- if (!(toys.optflags & C_BS)) out.sz = sz;
+ if (!(toys.optflags & C_BS)) TT.out.sz = sz;
break;
case C_COUNT:
- c_count = strsuftoll(arg, 0, ULLONG_MAX);
+ TT.c_count = strsuftoll(arg, 0, ULLONG_MAX);
break;
case C_IF:
- in.name = arg;
+ TT.in.name = arg;
break;
case C_OF:
- out.name = arg;
+ TT.out.name = arg;
break;
case C_SEEK:
- out.offset = strsuftoll(arg, 0, ULLONG_MAX);
+ TT.out.offset = strsuftoll(arg, 0, ULLONG_MAX);
break;
case C_SKIP:
- in.offset = strsuftoll(arg, 0, ULLONG_MAX);
+ TT.in.offset = strsuftoll(arg, 0, ULLONG_MAX);
+ break;
+ case C_STATUS:
+ if (!strcmp(arg, "noxfer")) TT.show_xfer = 0;
+ else if (!strcmp(arg, "none")) TT.show_xfer = TT.show_records = 0;
+ else error_exit("unknown status '%s'", arg);
break;
case C_CONV:
while (arg) {
toys.optargs++;
}
- do_dd();
+ signal(SIGINT, generic_signal);
+ signal(SIGUSR1, generic_signal);
+
+ setup_inout();
+ gettimeofday(&TT.start, NULL);
+
+ if ((toys.optflags&C_SEEK) && !(toys.optflags & C_NOTRUNC))
+ ftruncate(TT.out.fd, TT.out.offset * TT.out.sz);
+
+ while (!(toys.optflags & C_COUNT) || (TT.in_full + TT.in_part) < TT.c_count) {
+ ssize_t n;
+
+ if (toys.signal) {
+ // Show progress and exit on SIGINT or just continue on SIGUSR1.
+ status();
+ if (toys.signal == SIGINT) exit_signal(toys.signal);
+ toys.signal = 0;
+ }
+
+ TT.in.bp = TT.in.buff + TT.in.count;
+ if (toys.optflags & C_SYNC) memset(TT.in.bp, 0, TT.in.sz);
+ if (!(n = read(TT.in.fd, TT.in.bp, TT.in.sz))) break;
+ if (n < 0) {
+ if (errno == EINTR) continue;
+ //read error case.
+ perror_msg("%s: read error", TT.in.name);
+ if (!(toys.optflags & C_NOERROR)) exit(1);
+ status();
+ xlseek(TT.in.fd, TT.in.sz, SEEK_CUR);
+ if (!(toys.optflags & C_SYNC)) continue;
+ // if SYNC, then treat as full block of nuls
+ n = TT.in.sz;
+ }
+ if (n == TT.in.sz) {
+ TT.in_full++;
+ TT.in.count += n;
+ } else {
+ TT.in_part++;
+ if (toys.optflags & C_SYNC) TT.in.count += TT.in.sz;
+ else TT.in.count += n;
+ }
+
+ TT.out.count = TT.in.count;
+ if (toys.optflags & C_BS) {
+ write_out(1);
+ TT.in.count = 0;
+ continue;
+ }
+
+ if (TT.in.count >= TT.out.sz) {
+ write_out(0);
+ TT.in.count = TT.out.count;
+ }
+ }
+ if (TT.out.count) write_out(1); //write any remaining input blocks
+ if (toys.optflags & C_FSYNC && fsync(TT.out.fd) < 0)
+ perror_exit("%s: fsync fail", TT.out.name);
+
+ close(TT.in.fd);
+ close(TT.out.fd);
+ if (TT.in.buff) free(TT.in.buff);
+
+ status();
}
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