What does bash do when it receives the SIGINT signal?

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











up vote
2
down vote

favorite












This page says the following:




When Bash is interactive, in the absence of any traps, it ignores
SIGTERM (so that `kill 0' does not kill an interactive shell), and
SIGINT is caught and handled (so that the wait builtin is
interruptible). When Bash receives a SIGINT, it breaks out of any
executing loops.




Usually when a program receives the SIGINT signal, the program will exit. But bash does not exit when it receives the SIGINT signal, instead "it breaks out of any executing loops". What does that mean?




linux bash signals




share|improve this question






















  • That for and while loops are broken as though break was executed.
    – Ignacio Vazquez-Abrams
    Oct 28 '17 at 1:25














up vote
2
down vote

favorite












This page says the following:




When Bash is interactive, in the absence of any traps, it ignores
SIGTERM (so that `kill 0' does not kill an interactive shell), and
SIGINT is caught and handled (so that the wait builtin is
interruptible). When Bash receives a SIGINT, it breaks out of any
executing loops.




Usually when a program receives the SIGINT signal, the program will exit. But bash does not exit when it receives the SIGINT signal, instead "it breaks out of any executing loops". What does that mean?




linux bash signals




share|improve this question






















  • That for and while loops are broken as though break was executed.
    – Ignacio Vazquez-Abrams
    Oct 28 '17 at 1:25












up vote
2
down vote

favorite









up vote
2
down vote

favorite











This page says the following:




When Bash is interactive, in the absence of any traps, it ignores
SIGTERM (so that `kill 0' does not kill an interactive shell), and
SIGINT is caught and handled (so that the wait builtin is
interruptible). When Bash receives a SIGINT, it breaks out of any
executing loops.




Usually when a program receives the SIGINT signal, the program will exit. But bash does not exit when it receives the SIGINT signal, instead "it breaks out of any executing loops". What does that mean?




linux bash signals




share|improve this question














This page says the following:




When Bash is interactive, in the absence of any traps, it ignores
SIGTERM (so that `kill 0' does not kill an interactive shell), and
SIGINT is caught and handled (so that the wait builtin is
interruptible). When Bash receives a SIGINT, it breaks out of any
executing loops.




Usually when a program receives the SIGINT signal, the program will exit. But bash does not exit when it receives the SIGINT signal, instead "it breaks out of any executing loops". What does that mean?





linux bash signals





share|improve this question













share|improve this question




share|improve this question








edited Oct 28 '17 at 2:28









Jeff Schaller

32.1k849109




32.1k849109










asked Oct 28 '17 at 1:18









Joseph

1075




1075











  • That for and while loops are broken as though break was executed.
    – Ignacio Vazquez-Abrams
    Oct 28 '17 at 1:25
















  • That for and while loops are broken as though break was executed.
    – Ignacio Vazquez-Abrams
    Oct 28 '17 at 1:25















That for and while loops are broken as though break was executed.
– Ignacio Vazquez-Abrams
Oct 28 '17 at 1:25




That for and while loops are broken as though break was executed.
– Ignacio Vazquez-Abrams
Oct 28 '17 at 1:25










1 Answer
1






active

oldest

votes

















up vote
1
down vote



accepted










It means that the built-ins and loops that bash is running at that moment are aborted. To achieve the SIGINT effect on bash, use ^D






share|improve this answer


















  • 1




    From the bash manual: "In all cases, Bash ignores SIGQUIT." Bash will interpret Ctrl-D at the start of an input line as end of input and exit, but this has nothing to do with signals.
    – Johan Myréen
    Oct 28 '17 at 16:59











Your Answer







StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
convertImagesToLinks: false,
noModals: false,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);













 

draft saved


draft discarded


















StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f400989%2fwhat-does-bash-do-when-it-receives-the-sigint-signal%23new-answer', 'question_page');

);

Post as a guest

















1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes








up vote
1
down vote



accepted










It means that the built-ins and loops that bash is running at that moment are aborted. To achieve the SIGINT effect on bash, use ^D






share|improve this answer


















  • 1




    From the bash manual: "In all cases, Bash ignores SIGQUIT." Bash will interpret Ctrl-D at the start of an input line as end of input and exit, but this has nothing to do with signals.
    – Johan Myréen
    Oct 28 '17 at 16:59















up vote
1
down vote



accepted










It means that the built-ins and loops that bash is running at that moment are aborted. To achieve the SIGINT effect on bash, use ^D






share|improve this answer


















  • 1




    From the bash manual: "In all cases, Bash ignores SIGQUIT." Bash will interpret Ctrl-D at the start of an input line as end of input and exit, but this has nothing to do with signals.
    – Johan Myréen
    Oct 28 '17 at 16:59













up vote
1
down vote



accepted







up vote
1
down vote



accepted






It means that the built-ins and loops that bash is running at that moment are aborted. To achieve the SIGINT effect on bash, use ^D






share|improve this answer














It means that the built-ins and loops that bash is running at that moment are aborted. To achieve the SIGINT effect on bash, use ^D







share|improve this answer














share|improve this answer



share|improve this answer








edited Oct 28 '17 at 17:03

























answered Oct 28 '17 at 7:33









xanoetux

24113




24113







  • 1




    From the bash manual: "In all cases, Bash ignores SIGQUIT." Bash will interpret Ctrl-D at the start of an input line as end of input and exit, but this has nothing to do with signals.
    – Johan Myréen
    Oct 28 '17 at 16:59













  • 1




    From the bash manual: "In all cases, Bash ignores SIGQUIT." Bash will interpret Ctrl-D at the start of an input line as end of input and exit, but this has nothing to do with signals.
    – Johan Myréen
    Oct 28 '17 at 16:59








1




1




From the bash manual: "In all cases, Bash ignores SIGQUIT." Bash will interpret Ctrl-D at the start of an input line as end of input and exit, but this has nothing to do with signals.
– Johan Myréen
Oct 28 '17 at 16:59





From the bash manual: "In all cases, Bash ignores SIGQUIT." Bash will interpret Ctrl-D at the start of an input line as end of input and exit, but this has nothing to do with signals.
– Johan Myréen
Oct 28 '17 at 16:59


















 

draft saved


draft discarded















































 


draft saved


draft discarded














StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f400989%2fwhat-does-bash-do-when-it-receives-the-sigint-signal%23new-answer', 'question_page');

);

Post as a guest
































































-

Popular posts from this blog

How to check contact read email or not when send email to Individual?

Image
Clash Royale CLAN TAG #URR8PPP up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this question asked Sep 26 at 0:12 ToanLuong 49 9 add a comment  |  up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this questi...
Read more

Displaying single band from multi-band raster using QGIS

Image
Clash Royale CLAN TAG #URR8PPP 1 How can I extract a single band from multi-band raster in QGIS? I have an remote sensed image which has 6 bands (including NDVI band), I want to display each band separately, but have no idea how to do. I have seen some questions similar here but none worked for me. The original image (has 6 bands) is: I want to display the band 6 which should be like this: But I tried gdal_translate, and couldn't get the correct result. What I have got is: qgis raster multi-band share | improve this question edited Mar 5 at 0:53 Summer asked Mar 4 at 6:42 Summer Summer 23 6 Is this any help gis.stackexchange.com/questions/220658/… ? if not gis.stackexchange.com/questions/62133/… might help. – Michael Stimson Mar 4 at 6:46 Thanks for answering but when I used gdal_translate, qgis showed that 'Error 4: Kayena.tif: No such file or directory". Would you know how to fi...
Read more

How many registers does an x86_64 CPU actually have?

Image
Clash Royale CLAN TAG #URR8PPP up vote 2 down vote favorite I am currently learning reverse engineering and am studying the flags register. I had in my mind that rflags was just another name for one of the 16 general purpose registers, for example rax or rbx . But it looks like rflags is actually an additional register. So that makes 17 registers in total... how many more could there be? I have spent at least an hour on this and found numerous different answers. The best answer so far is this, which says that there are 40 registers in total. 16 General Purpose Registers 2 Status Registers 6 Code Segment Registers 16 SSE Registers 8 FPU/MMX Registers But if I add that up, I get 48. Could anybody provide an official answer on how many registers an x86_64 CPU has (e.g. an Intel i7). Additionally, I have seen references to 'hardware' and 'architectural' registers. What are those registers and how many are there? register x86-64 share | improve this...
Read more