Hi
I have a file with data arranged into columns. The first column is the chromosome name.
When I use grep to subset only rows with chr1, I get chr1 but also chr10, chr11,..
How do I get only rows with chr1?
grep chr1 filein > fileout
head fileout
chr1 59757841
chr11 108258691 ... (2 Replies)
Hi,
I'm struggling with a regex that would match a 'b' that follows an 'a' and is at the end of a string of non-white characters. For example:
Line 1: aba abab b abb aab bab baa
I can find the right strings but I'm lacking knowledge of how to "discard" the bits that precede bs.... (2 Replies)
Hi all,
any idea how to match the following:
char*<no or any string or space> buf and
char *<no or any string or space> buf
i need to capture the buf characters too.
currently i need two checks to cover this:
#search char* <any string> buf or char *<any string> buf
@noarray =... (2 Replies)
Hi all,
I am looking for a regex syntax to match repeated appearance. Likes,
']+]+' matches for string '65A SOME MORE AND 78B'
Now, this gets messy if I need to extract all such repeated appearance. I don't want to write ] four or five times for matching repeated appearance.
Thanks in... (2 Replies)
I am trying to match a similar line using grep with regular expression
the line is
/remote/mac/pbbbb/abc/def/hij/hop/include/abc/tif/element/test/testfiles/Office.cpp:57: const OfficeType& getType().get() const;
I just need to extract the bold characters using grep with regular expression.... (5 Replies)
hi everyone
suppose we have two scenario
echo ABCD | grep \{4\}
DATE
echo SYSDATE | grep \{4\}
SYSDATE
i want to match the string of four length only please help (5 Replies)
I've found this script which seems very promising to solve my issue:
To search and replace many different database passwords in many different (.php, .pl, .cgi, etc.) files across my filesystem.
The passwords may or may not be contained within quotes, single quotes, etc.
#!/bin/bash... (4 Replies)
echo 20110101 | awk '{ print match($0,/^((17||18||19||20)|)-*(|0|1)-*(|0||3)$/))
I am getting a match for the above, where as it shouldn't, as there is no hyphen in the echoed date.
Another question is what is the difference between || and | in the above statement (4 Replies)
Hi
I'd like to add the newline:
\tuser: nobody", or "<TAB>user: nobody
to all files named:
docker-compose.ymlin subfolders of pwd with names beginning with 10-20.
Within these files, I'd like to find the line (there'll only be one) containing:
command: celery workerNOTE: As far as... (2 Replies)
Discussion started by: duncanbetts
2 Replies
LEARN ABOUT FREEBSD
gpio_close
GPIO(3) BSD Library Functions Manual GPIO(3)NAME
gpio_open, gpio_close -- library to handle GPIO pins
LIBRARY
library ``libgpio''
SYNOPSIS
#include <libgpio.h>
gpio_handle_t
gpio_open(unsigned int unit);
gpio_handle_t
gpio_open_device(const char *device);
void
gpio_close(gpio_handle_t handle);
int
gpio_pin_list(gpio_handle_t handle, gpio_config_t **pcfgs);
int
gpio_pin_config(gpio_handle_t handle, gpio_config *cfg);
int
gpio_pin_set_flags(gpio_handle_t handle, gpio_config_t *cfg);
gpio_value_t
gpio_pin_get(gpio_handle_t handle, gpio_pin_t pin);
int
gpio_pin_set(gpio_handle_t handle, gpio_pin_t pin, gpio_value_t value);
int
gpio_pin_toggle(gpio_handle_t handle, gpio_pin_t pin);
int
gpio_pin_low(gpio_handle_t handle, gpio_pin_t pin);
int
gpio_pin_high(gpio_handle_t handle, gpio_pin_t pin);
int
gpio_pin_input(gpio_handle_t handle, gpio_pin_t pin);
int
gpio_pin_output(gpio_handle_t handle, gpio_pin_t pin);
int
gpio_pin_opendrain(gpio_handle_t handle, gpio_pin_t pin);
int
gpio_pin_pushpull(gpio_handle_t handle, gpio_pin_t pin);
int
gpio_pin_tristate(gpio_handle_t handle, gpio_pin_t pin);
int
gpio_pin_pullup(gpio_handle_t handle, gpio_pin_t pin);
int
gpio_pin_pulldown(gpio_handle_t handle, gpio_pin_t pin);
int
gpio_pin_invin(gpio_handle_t handle, gpio_pin_t pin);
int
gpio_pin_invout(gpio_handle_t handle, gpio_pin_t pin);
int
gpio_pin_pulsate(gpio_handle_t handle, gpio_pin_t pin);
DESCRIPTION
The libgpio library provides an interface to configure GPIO pins. The library operates with a gpio_handle_t opaque type which can be created
with gpio_open() or gpio_open_device(). When no more GPIO operations are needed, this handle can be destroyed with gpio_close().
To get a list of all available pins, one can call gpio_pin_list(). This function takes a pointer to a gpio_config_t which is dynamically
allocated. This pointer should be freed with free(3) when it's no longer necessary.
The function gpio_pin_config() retrieves the current configuration of a pin. The pin number should be passed in via the g_pin variable which
is part of the gpio_config_t structure.
The function gpio_pin_set_flags() configures a pin with the flags passed in by the gpio_config_t structure. The pin number should also be
passed in through the g_pin variable. All other structure members will be ignored by this function. The list of flags can be found in
/usr/include/sys/gpio.h.
The get or set the state of a GPIO pin, the functions gpio_pin_get() and gpio_pin_set() are available, respectively. To toggle the state,
use gpio_pin_toggle().
The functions gpio_pin_low() and gpio_pin_high() are wrappers around gpio_pin_set().
The functions gpio_pin_input(), gpio_pin_output(), gpio_pin_opendrain(), gpio_pin_pushpull(), gpio_pin_tristate(), gpio_pin_pullup(),
gpio_pin_pulldown(), gpio_pin_invin(), gpio_pin_invout() and gpio_pin_pulsate() are wrappers around gpio_pin_set_flags().
EXAMPLES
The following example shows how to configure pin 16 as output and then drive it high:
#include <err.h>
#include <libgpio.h>
gpio_handle_t handle;
handle = gpio_open(0);
if (handle == GPIO_HANDLE_INVALID)
err(1, "gpio_open failed");
gpio_pin_output(handle, 16);
gpio_pin_high(handle, 16);
gpio_close(handle);
The following example shows how to get a configuration of a pin:
gpio_config_t cfg;
cfg.g_pin = 32;
gpio_pin_config(handle, &cfg);
The structure will contain the name of the pin and its flags.
SEE ALSO gpiobus(4), gpioctl(8)HISTORY
The libgpio library first appeared in FreeBSD 11.0.
AUTHORS
The libgpio library was implemented by Rui Paulo <rpaulo@FreeBSD.org>.
BSD November 17, 2014 BSD