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Difference between > and >> when used with a named pipe
Difference between > and | with /dev/ttycontinuous reading from named pipe (cat or tail -f)Why does my named pipe keep getting modified?Pipe Named Fiforedirect to a named pipeDifference between 1> and >Difference between 2>&1 <command> and <command> 2>&1Change buffer size of named pipedifference between 2>&1 | tee output.log and |& tee output.logwhat is the difference between >&2 and &>2
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
Is there any difference between the two redirections in the following code?
mkfifo foo
echo > foo
echo >> foo
io-redirection fifo
edited 7 hours ago
Kusalananda♦
149k18284471
asked 8 hours ago
Olegzandr DenmanOlegzandr Denman
1392
add a comment |
Is there any difference between the two redirections in the following code?
mkfifo foo
echo > foo
echo >> foo
io-redirection fifo
edited 7 hours ago
Kusalananda♦
149k18284471
asked 8 hours ago
Olegzandr DenmanOlegzandr Denman
1392
1
mkfifo: difference between > and >>would look clearer
– jsotola
8 hours ago
add a comment |
Is there any difference between the two redirections in the following code?
mkfifo foo
echo > foo
echo >> foo
io-redirection fifo
edited 7 hours ago
Kusalananda♦
149k18284471
asked 8 hours ago
Olegzandr DenmanOlegzandr Denman
1392
Is there any difference between the two redirections in the following code?
mkfifo foo
echo > foo
echo >> foo
io-redirection fifo
io-redirection fifo
edited 7 hours ago
Kusalananda♦
149k18284471
asked 8 hours ago
Olegzandr DenmanOlegzandr Denman
1392
edited 7 hours ago
Kusalananda♦
149k18284471
asked 8 hours ago
Olegzandr DenmanOlegzandr Denman
1392
edited 7 hours ago
Kusalananda♦
149k18284471
edited 7 hours ago
Kusalananda♦
149k18284471
edited 7 hours ago
Kusalananda♦
149k18284471
149k18284471
asked 8 hours ago
Olegzandr DenmanOlegzandr Denman
1392
asked 8 hours ago
Olegzandr DenmanOlegzandr Denman
1392
asked 8 hours ago
Olegzandr DenmanOlegzandr Denman
1392
1392
1
mkfifo: difference between > and >>would look clearer
– jsotola
8 hours ago
add a comment |
1
mkfifo: difference between > and >>would look clearer
– jsotola
8 hours ago
1
1
mkfifo: difference between > and >> would look clearer– jsotola
8 hours ago
mkfifo: difference between > and >> would look clearer– jsotola
8 hours ago
add a comment |
2 Answers
2
active
oldest
votes
There should be no difference. The >> will open the fifo with the O_APPEND flag, and that shouldn't make any difference on a fifo or other non-seekable file.
However, there are buggy interfaces like sendfile(2) in Linux, which do not work with files opened in O_APPEND mode, and will object even to non-seekable files having that mode set, so you better always use the > form.
answered 8 hours ago
mosvymosvy
12.7k11543
add a comment |
> overwrites the destination file
>> appends to the destination file
Thanks to Jobin at AskUbuntu for the authoritative answer with 45 likes.
answered 8 hours ago
K7AAYK7AAY
1,7851029
1
Notice that the redirections are used with a named pipe in the question, not a regular file. The question is whether>and>>has the same effect.
– Kusalananda♦
7 hours ago
add a comment |
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2 Answers
2
active
oldest
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2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
There should be no difference. The >> will open the fifo with the O_APPEND flag, and that shouldn't make any difference on a fifo or other non-seekable file.
However, there are buggy interfaces like sendfile(2) in Linux, which do not work with files opened in O_APPEND mode, and will object even to non-seekable files having that mode set, so you better always use the > form.
answered 8 hours ago
mosvymosvy
12.7k11543
add a comment |
There should be no difference. The >> will open the fifo with the O_APPEND flag, and that shouldn't make any difference on a fifo or other non-seekable file.
However, there are buggy interfaces like sendfile(2) in Linux, which do not work with files opened in O_APPEND mode, and will object even to non-seekable files having that mode set, so you better always use the > form.
answered 8 hours ago
mosvymosvy
12.7k11543
add a comment |
There should be no difference. The >> will open the fifo with the O_APPEND flag, and that shouldn't make any difference on a fifo or other non-seekable file.
However, there are buggy interfaces like sendfile(2) in Linux, which do not work with files opened in O_APPEND mode, and will object even to non-seekable files having that mode set, so you better always use the > form.
answered 8 hours ago
mosvymosvy
12.7k11543
There should be no difference. The >> will open the fifo with the O_APPEND flag, and that shouldn't make any difference on a fifo or other non-seekable file.
However, there are buggy interfaces like sendfile(2) in Linux, which do not work with files opened in O_APPEND mode, and will object even to non-seekable files having that mode set, so you better always use the > form.
answered 8 hours ago
mosvymosvy
12.7k11543
edited 7 hours ago
answered 8 hours ago
mosvymosvy
12.7k11543
answered 8 hours ago
mosvymosvy
12.7k11543
answered 8 hours ago
mosvymosvy
12.7k11543
12.7k11543
add a comment |
add a comment |
> overwrites the destination file
>> appends to the destination file
Thanks to Jobin at AskUbuntu for the authoritative answer with 45 likes.
answered 8 hours ago
K7AAYK7AAY
1,7851029
1
Notice that the redirections are used with a named pipe in the question, not a regular file. The question is whether>and>>has the same effect.
– Kusalananda♦
7 hours ago
add a comment |
> overwrites the destination file
>> appends to the destination file
Thanks to Jobin at AskUbuntu for the authoritative answer with 45 likes.
answered 8 hours ago
K7AAYK7AAY
1,7851029
1
Notice that the redirections are used with a named pipe in the question, not a regular file. The question is whether>and>>has the same effect.
– Kusalananda♦
7 hours ago
add a comment |
> overwrites the destination file
>> appends to the destination file
Thanks to Jobin at AskUbuntu for the authoritative answer with 45 likes.
answered 8 hours ago
K7AAYK7AAY
1,7851029
> overwrites the destination file
>> appends to the destination file
Thanks to Jobin at AskUbuntu for the authoritative answer with 45 likes.
answered 8 hours ago
K7AAYK7AAY
1,7851029
answered 8 hours ago
K7AAYK7AAY
1,7851029
answered 8 hours ago
K7AAYK7AAY
1,7851029
answered 8 hours ago
K7AAYK7AAY
1,7851029
1,7851029
1
Notice that the redirections are used with a named pipe in the question, not a regular file. The question is whether>and>>has the same effect.
– Kusalananda♦
7 hours ago
add a comment |
1
Notice that the redirections are used with a named pipe in the question, not a regular file. The question is whether>and>>has the same effect.
– Kusalananda♦
7 hours ago
1
1
Notice that the redirections are used with a named pipe in the question, not a regular file. The question is whether
> and >> has the same effect.– Kusalananda♦
7 hours ago
Notice that the redirections are used with a named pipe in the question, not a regular file. The question is whether
> and >> has the same effect.– Kusalananda♦
7 hours ago
add a comment |
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1
mkfifo: difference between > and >>would look clearer– jsotola
8 hours ago