Check if command is succesfull without using if statement
Here is a big problem I have. I want to write a command and execute print out the message if command is not successful. So is there a way to do following in single line:
gcc -c test.cpp
if [ $? -ne 0 ]
then
echo "this failed so badly"
fi
I know this line:
gcc test.c && [ $? -ne 0 ] && echo "Hell"
will not output anything because gcc will be successful and [ $? -ne 0 ] will fail thus echo will not be executed. So how do I exectue [ $? -ne 0 ] if gcc fails?
Thank you in advance.
linux bash shell
asked 12 mins ago
GoxGox
1736
add a comment |
Here is a big problem I have. I want to write a command and execute print out the message if command is not successful. So is there a way to do following in single line:
gcc -c test.cpp
if [ $? -ne 0 ]
then
echo "this failed so badly"
fi
I know this line:
gcc test.c && [ $? -ne 0 ] && echo "Hell"
will not output anything because gcc will be successful and [ $? -ne 0 ] will fail thus echo will not be executed. So how do I exectue [ $? -ne 0 ] if gcc fails?
Thank you in advance.
linux bash shell
asked 12 mins ago
GoxGox
1736
gcc -c test.cpp || echo FAIL
– Uncle Billy
7 mins ago
@UncleBilly can I than follow that with&&and some more commands?
– Gox
5 mins ago
Yes, but take care because||and&&have the same precedence in the shell language.a || b && cwill be parsed as{ a || b; } && c, nota || { b && c; }
– Uncle Billy
2 mins ago
{ a || b } && cis what i want
– Gox
50 secs ago
add a comment |
Here is a big problem I have. I want to write a command and execute print out the message if command is not successful. So is there a way to do following in single line:
gcc -c test.cpp
if [ $? -ne 0 ]
then
echo "this failed so badly"
fi
I know this line:
gcc test.c && [ $? -ne 0 ] && echo "Hell"
will not output anything because gcc will be successful and [ $? -ne 0 ] will fail thus echo will not be executed. So how do I exectue [ $? -ne 0 ] if gcc fails?
Thank you in advance.
linux bash shell
asked 12 mins ago
GoxGox
1736
Here is a big problem I have. I want to write a command and execute print out the message if command is not successful. So is there a way to do following in single line:
gcc -c test.cpp
if [ $? -ne 0 ]
then
echo "this failed so badly"
fi
I know this line:
gcc test.c && [ $? -ne 0 ] && echo "Hell"
will not output anything because gcc will be successful and [ $? -ne 0 ] will fail thus echo will not be executed. So how do I exectue [ $? -ne 0 ] if gcc fails?
Thank you in advance.
linux bash shell
linux bash shell
asked 12 mins ago
GoxGox
1736
asked 12 mins ago
GoxGox
1736
asked 12 mins ago
GoxGox
1736
asked 12 mins ago
GoxGox
1736
asked 12 mins ago
GoxGox
1736
1736
gcc -c test.cpp || echo FAIL
– Uncle Billy
7 mins ago
@UncleBilly can I than follow that with&&and some more commands?
– Gox
5 mins ago
Yes, but take care because||and&&have the same precedence in the shell language.a || b && cwill be parsed as{ a || b; } && c, nota || { b && c; }
– Uncle Billy
2 mins ago
{ a || b } && cis what i want
– Gox
50 secs ago
add a comment |
gcc -c test.cpp || echo FAIL
– Uncle Billy
7 mins ago
@UncleBilly can I than follow that with&&and some more commands?
– Gox
5 mins ago
Yes, but take care because||and&&have the same precedence in the shell language.a || b && cwill be parsed as{ a || b; } && c, nota || { b && c; }
– Uncle Billy
2 mins ago
{ a || b } && cis what i want
– Gox
50 secs ago
gcc -c test.cpp || echo FAIL– Uncle Billy
7 mins ago
gcc -c test.cpp || echo FAIL– Uncle Billy
7 mins ago
@UncleBilly can I than follow that with
&& and some more commands?– Gox
5 mins ago
@UncleBilly can I than follow that with
&& and some more commands?– Gox
5 mins ago
Yes, but take care because
|| and && have the same precedence in the shell language. a || b && c will be parsed as { a || b; } && c, not a || { b && c; }– Uncle Billy
2 mins ago
Yes, but take care because
|| and && have the same precedence in the shell language. a || b && c will be parsed as { a || b; } && c, not a || { b && c; }– Uncle Billy
2 mins ago
{ a || b } && c is what i want– Gox
50 secs ago
{ a || b } && c is what i want– Gox
50 secs ago
add a comment |
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gcc -c test.cpp || echo FAIL– Uncle Billy
7 mins ago
@UncleBilly can I than follow that with
&&and some more commands?– Gox
5 mins ago
Yes, but take care because
||and&&have the same precedence in the shell language.a || b && cwill be parsed as{ a || b; } && c, nota || { b && c; }– Uncle Billy
2 mins ago
{ a || b } && cis what i want– Gox
50 secs ago