An error occurs in the open part of the c code used by Android [closed]

-2

I am calling the function from C code.

FILE *temp;

char command = "dumpsys SurfaceFlinger --latency SurfaceView";

strcat(command,"" );

temp = popen(command, "r");

I call this once a second. But in about five minutes the process will be over. I checked the log and found that there was a problem in the open. But we don't know what caused it.

asked Nov 16 at 6:27

DOBY

244

closed as off-topic by Vega, sideshowbarker, jww, Madhur Bhaiya, Makyen Nov 26 at 11:37

This question appears to be off-topic. The users who voted to close gave this specific reason:

"This question was caused by a problem that can no longer be reproduced or a simple typographical error. While similar questions may be on-topic here, this one was resolved in a manner unlikely to help future readers. This can often be avoided by identifying and closely inspecting the shortest program necessary to reproduce the problem before posting." – Vega, sideshowbarker, Makyen

If this question can be reworded to fit the rules in the help center, please edit the question.

3

Do you ever close it?
– Osiris
Nov 16 at 6:30

3

What is strcat supposed to do? You can't add anything to that string. You should check the return value of popen.
– Osiris
Nov 16 at 6:32

I want to check the value of popen, but I cannot check the value because the process has ended. Do you happen to know how to view the error log?
– DOBY
Nov 16 at 6:39

3

Are you closing it every time before calling it again?
– Osiris
Nov 16 at 6:40

add a comment |

-2

I am calling the function from C code.

FILE *temp;

char command = "dumpsys SurfaceFlinger --latency SurfaceView";

strcat(command,"" );

temp = popen(command, "r");

I call this once a second. But in about five minutes the process will be over. I checked the log and found that there was a problem in the open. But we don't know what caused it.

asked Nov 16 at 6:27

DOBY

244

closed as off-topic by Vega, sideshowbarker, jww, Madhur Bhaiya, Makyen Nov 26 at 11:37

This question appears to be off-topic. The users who voted to close gave this specific reason:

"This question was caused by a problem that can no longer be reproduced or a simple typographical error. While similar questions may be on-topic here, this one was resolved in a manner unlikely to help future readers. This can often be avoided by identifying and closely inspecting the shortest program necessary to reproduce the problem before posting." – Vega, sideshowbarker, Makyen

If this question can be reworded to fit the rules in the help center, please edit the question.

3

Do you ever close it?
– Osiris
Nov 16 at 6:30

3

What is strcat supposed to do? You can't add anything to that string. You should check the return value of popen.
– Osiris
Nov 16 at 6:32

I want to check the value of popen, but I cannot check the value because the process has ended. Do you happen to know how to view the error log?
– DOBY
Nov 16 at 6:39

3

Are you closing it every time before calling it again?
– Osiris
Nov 16 at 6:40

add a comment |

-2

I am calling the function from C code.

FILE *temp;

char command = "dumpsys SurfaceFlinger --latency SurfaceView";

strcat(command,"" );

temp = popen(command, "r");

I call this once a second. But in about five minutes the process will be over. I checked the log and found that there was a problem in the open. But we don't know what caused it.

asked Nov 16 at 6:27

DOBY

244

I am calling the function from C code.

FILE *temp;

char command = "dumpsys SurfaceFlinger --latency SurfaceView";

strcat(command,"" );

temp = popen(command, "r");

I call this once a second. But in about five minutes the process will be over. I checked the log and found that there was a problem in the open. But we don't know what caused it.

android c android-ndk

asked Nov 16 at 6:27

DOBY

244

asked Nov 16 at 6:27

DOBY

244

asked Nov 16 at 6:27

DOBY

244

asked Nov 16 at 6:27

DOBY

244

asked Nov 16 at 6:27

DOBY

244

closed as off-topic by Vega, sideshowbarker, jww, Madhur Bhaiya, Makyen Nov 26 at 11:37

This question appears to be off-topic. The users who voted to close gave this specific reason:

"This question was caused by a problem that can no longer be reproduced or a simple typographical error. While similar questions may be on-topic here, this one was resolved in a manner unlikely to help future readers. This can often be avoided by identifying and closely inspecting the shortest program necessary to reproduce the problem before posting." – Vega, sideshowbarker, Makyen

If this question can be reworded to fit the rules in the help center, please edit the question.

closed as off-topic by Vega, sideshowbarker, jww, Madhur Bhaiya, Makyen Nov 26 at 11:37

This question appears to be off-topic. The users who voted to close gave this specific reason:

"This question was caused by a problem that can no longer be reproduced or a simple typographical error. While similar questions may be on-topic here, this one was resolved in a manner unlikely to help future readers. This can often be avoided by identifying and closely inspecting the shortest program necessary to reproduce the problem before posting." – Vega, sideshowbarker, Makyen

If this question can be reworded to fit the rules in the help center, please edit the question.

3

Do you ever close it?
– Osiris
Nov 16 at 6:30

3

What is strcat supposed to do? You can't add anything to that string. You should check the return value of popen.
– Osiris
Nov 16 at 6:32

I want to check the value of popen, but I cannot check the value because the process has ended. Do you happen to know how to view the error log?
– DOBY
Nov 16 at 6:39

3

Are you closing it every time before calling it again?
– Osiris
Nov 16 at 6:40

add a comment |

3

Do you ever close it?
– Osiris
Nov 16 at 6:30

3

What is strcat supposed to do? You can't add anything to that string. You should check the return value of popen.
– Osiris
Nov 16 at 6:32

I want to check the value of popen, but I cannot check the value because the process has ended. Do you happen to know how to view the error log?
– DOBY
Nov 16 at 6:39

3

Are you closing it every time before calling it again?
– Osiris
Nov 16 at 6:40

Do you ever close it?
– Osiris
Nov 16 at 6:30

What is strcat supposed to do? You can't add anything to that string. You should check the return value of popen.
– Osiris
Nov 16 at 6:32

I want to check the value of popen, but I cannot check the value because the process has ended. Do you happen to know how to view the error log?
– DOBY
Nov 16 at 6:39

Are you closing it every time before calling it again?
– Osiris
Nov 16 at 6:40

add a comment |

1 Answer
1

active

oldest

votes

I got the cause. It was because I didn't "pclose" after doing "popen" elsewhere. I like to say, "Too many open files"

answered Nov 16 at 9:45

DOBY

244

add a comment |

1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

I got the cause. It was because I didn't "pclose" after doing "popen" elsewhere. I like to say, "Too many open files"

answered Nov 16 at 9:45

DOBY

244

add a comment |

I got the cause. It was because I didn't "pclose" after doing "popen" elsewhere. I like to say, "Too many open files"

answered Nov 16 at 9:45

DOBY

244

add a comment |

I got the cause. It was because I didn't "pclose" after doing "popen" elsewhere. I like to say, "Too many open files"

answered Nov 16 at 9:45

DOBY

244

I got the cause. It was because I didn't "pclose" after doing "popen" elsewhere. I like to say, "Too many open files"

answered Nov 16 at 9:45

DOBY

244

answered Nov 16 at 9:45

DOBY

244

answered Nov 16 at 9:45

DOBY

244

answered Nov 16 at 9:45

DOBY

244

add a comment |

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