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-rw-r--r--toys/pending/dd.c91
1 files changed, 42 insertions, 49 deletions
diff --git a/toys/pending/dd.c b/toys/pending/dd.c
index b09a7dfe..c3e51cfa 100644
--- a/toys/pending/dd.c
+++ b/toys/pending/dd.c
@@ -143,50 +143,6 @@ static void status()
}
}
-static void setup_inout()
-{
- /* 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
- */
- 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 (!TT.in.name) {
- TT.in.name = "stdin";
- TT.in.fd = STDIN_FILENO;
- } else TT.in.fd = xopenro(TT.in.name);
-
- //setup outout
- if (!TT.out.name) {
- TT.out.name = "stdout";
- TT.out.fd = STDOUT_FILENO;
- } else {
- int flags = O_WRONLY|O_CREAT;
- if (!(toys.optflags&C_NOTRUNC)) flags |= O_TRUNC;
- TT.out.fd = xcreate(TT.out.name, flags, 0666);
- }
-
- 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", TT.in.name);
- exit(0);
- }
- }
- }
- }
-
- if (TT.out.offset) xlseek(TT.out.fd, (off_t)(TT.out.offset * TT.out.sz), SEEK_CUR);
-}
-
static void write_out(int all)
{
TT.out.bp = TT.out.buff;
@@ -276,20 +232,57 @@ void dd_main()
signal(SIGINT, generic_signal);
signal(SIGUSR1, generic_signal);
-
- setup_inout();
gettimeofday(&TT.start, NULL);
+ /* 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
+ */
+ 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 (!TT.in.name) TT.in.name = "stdin";
+ else TT.in.fd = xopenro(TT.in.name);
+
+ //setup output
+ if (!TT.out.name) {
+ TT.out.name = "stdout";
+ TT.out.fd = 1;
+ } else TT.out.fd = xcreate(TT.out.name,
+ O_WRONLY|O_CREAT|(O_TRUNC*!(toys.optflags&C_NOTRUNC)), 0666);
+
+ // Implement skip=
+ 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) {
+ perror_msg("%s", TT.in.name);
+ if (toys.optflags & C_NOERROR) status();
+ else return;
+ } else if (!n) {
+ xprintf("%s: Can't skip\n", TT.in.name);
+ return;
+ }
+ }
+ }
+ }
+
+ if (TT.out.offset)
+ xlseek(TT.out.fd, TT.out.offset * (off_t)TT.out.sz, SEEK_CUR);
+
if ((toys.optflags&C_SEEK) && !(toys.optflags & C_NOTRUNC))
- ftruncate(TT.out.fd, TT.out.offset * TT.out.sz);
+ if (ftruncate(TT.out.fd, TT.out.offset * TT.out.sz))
+ perror_exit("ftruncate");
while (!(toys.optflags & C_COUNT) || (TT.in_full + TT.in_part) < TT.c_count) {
ssize_t n;
+ // Show progress and exit on SIGINT or just continue on SIGUSR1.
if (toys.signal) {
- // Show progress and exit on SIGINT or just continue on SIGUSR1.
status();
- if (toys.signal == SIGINT) exit_signal(toys.signal);
+ if (toys.signal==SIGINT) exit_signal(toys.signal);
toys.signal = 0;
}