I have an inputfile that I trying to awk with a getline(Solaris v8 ksh). However I need to have the results be a unique. Is there a comparable command within awk to return a unique result? Or can you break out of the awk to add a uniq. I am looking for something more complex then a pipe... (6 Replies)
I have a C program I've written that includes a 'getline' call that is used to read a line at a time from a file and process the information in each line. A potential problem comes up since I don't know the maximum length of each line; right now I'm using a constant of 256, but that might not be... (2 Replies)
How do you make the getline function return to the original line?
The example below should make it clear where I am currently going wrong.
Thanks
AWK SCRIPT:
-------------
awk -F '-' '{
tmpLine = "EMPTY"
print "CURRENT LINE :"$0
getline tmpLine
print "NEXT LINE :"tmpLine
}'... (1 Reply)
Hi,
I need to zip/compress a data file and send to a vendor. The vendor does have only unzip utility and can accept only .ZIP files. I do not have zip utility in my server.
How do I zip/compress the file so that it can be deflated using unzip command ? I tried gzip & compress commands, but... (1 Reply)
BEGIN {
system("clear")
blank = " "
printf("Please enter your name or emp# : > ")
getline < "/dev/tty"
printf(">>>>> %s",$1)
}
/$1/ {..........
I would like for the customer to enter name or... (3 Replies)
I can not get 'getline()' to compile. I have tried.
string curLine; //= compiler error
char* curLine; //=compiler error
char curLine; //=compiler error
Every example I see uses a string as a getline(); parameter. It does not work for me on Fedora14 with gcc-c++. Thank you so much. This... (1 Reply)
I'm running the script below and get the output below against a file with
lineA=aaa
lineB=bbb
lineC=ccc
lineD=ddd
I get output:
lineC=ccc
lineD=ddd
I need the output to be:
lineB=bbb
lineC=ccc
lineD=ddd
cat filename | nawk '/lineA=aaa/ {
getline;
do {
getline (3 Replies)
Here is I want to do:
find lines in file filteredtrace.txt which is not continued as
a multiply of 4 and strip them from file original_trace_framno.
problem is awk used the ' symbol
so pipe of getline has to use the " symbol
while agument of sed has to use the " symbol,
it doesn't... (8 Replies)
Hi All,
When I do man getline on my Linux system (in BASH), I see an example C code where a file is being read using getline() function.
Now, my question is why there is no fclose() to close the open file pointer?
People who don't have a Linux system, this is the code that I am referring... (3 Replies)
Discussion started by: shoaibjameel123
3 Replies
LEARN ABOUT NETBSD
getline
GETDELIM(3) BSD Library Functions Manual GETDELIM(3)NAME
getdelim, getline -- read a delimited record from a stream
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdio.h>
ssize_t
getdelim(char ** restrict lineptr, size_t * restrict n, int delimiter, FILE * restrict stream);
ssize_t
getline(char ** restrict lineptr, size_t * restrict n, FILE * restrict stream);
DESCRIPTION
The getdelim() function reads from the stream until it encounters a character matching delimiter, storing the input in *lineptr. The buffer
is NUL-terminated and includes the delimiter. The delimiter character must be representable as an unsigned char.
If *n is non-zero, then *lineptr must be pre-allocated to at least *n bytes. The buffer should be allocated dynamically; it must be possible
to free(3) *lineptr. getdelim() ensures that *lineptr is large enough to hold the input, updating *n to reflect the new size.
The getline() function is equivalent to getdelim() with delimiter set to the newline character.
RETURN VALUES
The getdelim() and getline() functions return the number of characters read, including the delimiter. If no characters were read and the
stream is at end-of-file, the functions return -1. If an error occurs, the functions return -1 and the global variable errno is set to indi-
cate the error.
The functions do not distinguish between end-of-file and error, and callers must use feof(3) and ferror(3) to determine which occurred.
EXAMPLES
The following code fragment reads lines from a file and writes them to standard output.
char *line = NULL;
size_t linesize = 0;
ssize_t linelen;
while ((linelen = getline(&line, &linesize, fp)) != -1)
fwrite(line, linelen, 1, stdout);
if (ferror(fp))
perror("getline");
ERRORS
[EINVAL] lineptr or n is a NULL pointer.
[EOVERFLOW] More than SSIZE_MAX characters were read without encountering the delimiter.
The getdelim() and getline() functions may also fail and set errno for any of the errors specified in the routines fflush(3), malloc(3),
read(2), stat(2), or realloc(3).
SEE ALSO ferror(3), fgets(3), fopen(3)STANDARDS
The getdelim() and getline() functions conform to IEEE Std 1003.1-2008 (``POSIX.1'').
BSD June 30, 2010 BSD
11-12-2006
