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UNIX for Beginners Questions & Answers
How to use printf in bash
Post 303022350 by sheltie042 on Thursday 30th of August 2018 01:14:39 PM
08-30-2018
How to use printf in bash
Hello, this is my first time on the forum. I seem to not have the ability to start a new thread. However, I have a very simple question. I am trying to write a script I have to use printf to say "My name is myname (pulled from $USER) . it works with echo, but with printf the $USER name is my longer. any suggestions.
------ Post updated at 12:14 PM ------
I am new to the forum. can't find a place to start new thread. I need help. Hve assignment in UNIX. beginning! Need to use printf to say "My name is ......." I have to pull my name from $USER. When I do that with echo it works. with printf it lists a long string. how can I shorten $USER to just my name with printf.
------ Post updated at 12:14 PM ------
I am new to the forum. can't find a place to start new thread. I need help. Hve assignment in UNIX. beginning! Need to use printf to say "My name is ......." I have to pull my name from $USER. When I do that with echo it works. with printf it lists a long string. how can I shorten $USER to just my name with printf.
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Last edited by bakunin; 08-30-2018 at 04:49 PM..
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LEARN ABOUT NETBSD
pthread_getname_np
PTHREAD_GETNAME_NP(3) BSD Library Functions Manual PTHREAD_GETNAME_NP(3) NAME
pthread_getname_np -- get and set descriptive name of a thread LIBRARY
POSIX Threads Library (libpthread, -lpthread) SYNOPSIS
#include <pthread.h> int pthread_getname_np(pthread_t thread, char *name, size_t len); int pthread_setname_np(pthread_t thread, const char *name, void *arg); DESCRIPTION
The pthread_getname_np() function obtains the descriptive name of a thread. It takes the following arguments: thread The thread whose descriptive name will be obtained. name The buffer to be filled with the descriptive name of the thread. len The size of the buffer name in bytes. The pthread_setname_np() function sets the descriptive name of a thread. It takes the following arguments: thread The thread whose descriptive name will be set. name The printf(3) format string to be used to construct the descriptive name of the thread. The resulted descriptive name should be shorter than PTHREAD_MAX_NAMELEN_NP. arg The printf(3) argument used with name. RETURN VALUES
Both functions return 0 on success. Otherwise, an error number is returned to indicate the error. COMPATIBILITY
Both functions are non-standard extensions. ERRORS
Both functions may fail if: [EINVAL] Invalid parameter. [ESRCH] Non-existent thread. The pthread_setname_np() function may also fail if: [ENOMEM] There was insufficient memory for the operation. SEE ALSO
pthread_attr_get_np(3), pthread_attr_getname_np(3) BSD
July 9, 2010 BSD