Top Forums Shell Programming and Scripting Using awk to change a specific column and in a specific row Post 303036293 by juggernautjoee on Friday 21st of June 2019 02:44:29 PM
Using awk to change a specific column and in a specific row

I am trying to change the number in bold to 2400


I'm not sure if sed or awk is the answer. I was going to use sed and do a character count up to that point, but that column directly before 0640 might change values from file to file.

Last edited by vgersh99; 06-21-2019 at 04:55 PM.. Reason: Code tags, please!
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PROP_SEND_IOCTL(3)					   BSD Library Functions Manual 					PROP_SEND_IOCTL(3)

prop_array_send_ioctl, prop_array_recv_ioctl, prop_dictionary_send_ioctl, prop_dictionary_recv_ioctl, prop_dictionary_sendrecv_ioctl -- Send and receive propertly lists to and from the kernel using ioctl SYNOPSIS
#include <prop/proplib.h> int prop_array_send_ioctl(prop_array_t array, int fd, unsigned long cmd); int prop_array_recv_ioctl(int fd, unsigned long cmd, prop_array_t *arrayp); int prop_dictionary_send_ioctl(prop_dictionary_t dict, int fd, unsigned long cmd); int prop_dictionary_recv_ioctl(int fd, unsigned long cmd, prop_dictionary_t *dictp); int prop_dictionary_sendrecv_ioctl(prop_dictionary_t dict, int fd, unsigned long cmd, prop_dictionary_t *dictp); DESCRIPTION
The prop_array_send_ioctl, prop_array_recv_ioctl, prop_dictionary_send_ioctl, prop_dictionary_recv_ioctl, and prop_dictionary_sendrecv_ioctl functions implement the user space side of a protocol for sending property lists to and from the kernel using ioctl(2). RETURN VALUES
If successful, functions return zero. Otherwise, an error number is returned to indicate the error. EXAMPLES
The following (simplified) example demonstrates using prop_dictionary_send_ioctl() and prop_dictionary_recv_ioctl() in an application: void foo_setprops(prop_dictionary_t dict) { int fd; fd = open("/dev/foo", O_RDWR, 0640); if (fd == -1) return; (void) prop_dictionary_send_ioctl(dict, fd, FOOSETPROPS); (void) close(fd); } prop_dictionary_t foo_getprops(void) { prop_dictionary_t dict; int fd; fd = open("/dev/foo", O_RDONLY, 0640); if (fd == -1) return (NULL); if (prop_dictionary_recv_ioctl(fd, FOOGETPROPS, &dict) != 0) return (NULL); (void) close(fd); return (dict); } The prop_dictionary_sendrecv_ioctl function combines the send and receive functionality, allowing for ioctls that require two-way communica- tion (for example to specify arguments for the ioctl operation). ERRORS
prop_array_send_ioctl() and prop_dictionary_send_ioctl() will fail if: [ENOMEM] Cannot allocate memory [ENOTSUP] Not supported prop_array_recv_ioctl() and prop_dictionary_recv_ioctl() will fail if: [EIO] Input/output error [ENOTSUP] Not supported In addition to these, ioctl(2) errors may be returned. SEE ALSO
prop_array(3), prop_dictionary(3), proplib(3), prop_copyin_ioctl(9) HISTORY
The proplib property container object library first appeared in NetBSD 4.0. BSD
January 21, 2008 BSD

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