09-12-2014
10 More Discussions You Might Find Interesting
1. Programming
I searched on the forums. No advises.
I am using a previous source code. I changed the main function main(int argc, char **argv) in a function misc(int argc, char **argv). How do you use the argc and argv parameters? This is how I am calling the function :
char param;
strcat(param,"wgrib ");... (4 Replies)
Discussion started by: Akeson Chihiro
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2. Programming
Is it possible to use the dbx debugger with the CL options for the executable ?
Say you have created a executable called myfunc which can take string arguments at run-time. You run it like this
./myfunc Hello World
where Hello and World are the string arguments
My question is whether... (1 Reply)
Discussion started by: JamesGoh
1 Replies
3. Programming
Hi C experts,
I have the following code for adding command line option for a program
int main (argc, argv)
int argc;
char *argv;
{
char *mem_type; //memory type
char *name; //name of the memory
int addr; //address bits
int data; ... (5 Replies)
Discussion started by: return_user
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4. Programming
Hello All,
First post. I've been struggling with the following:
Given a char* string, I need to construct an "int argc, char *argv" style structure. What I'm struggling with most is handling escaped-whitespace and quotes.
e.g. the string:
char *s = "hello world 'my name is simon'... (10 Replies)
Discussion started by: cbarwise
10 Replies
5. Programming
Hi,
Can somehelp help how to list file in a dir? (5 Replies)
Discussion started by: Learnerabc
5 Replies
6. Programming
when i run my program, i have a parameter, that i want to set the value to another string
i am using
int main(int argc, char **argv) {
char my_str=argv;
printf("%s",my_str);
return 0;
}
and i get
Segmentation fault
ran using
./my_prog /usr/share/dict/words hello1
... (2 Replies)
Discussion started by: omega666
2 Replies
7. Shell Programming and Scripting
Hi Folks,
I've prepared a shell script that takes action based on arguments and number of arguments..sample code like:
ARGV=("$@")
ARGC=("$#")
case ${ARGV} in
abc)
if ; then
......
else
printf "\nInvalid number of arguments, please check the inputs and... (2 Replies)
Discussion started by: SBC
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8. Shell Programming and Scripting
Hi guys,
i'm trying to solve this problem.
I have to run something like
cat file1.txt | awk -f script.awk 10
if i'm in the awk script, how can i take the parameter :10 ??:wall:
i try something like :
BEGIN{
var=argv
}
{..}
END{..}
but obviously is not correct... (5 Replies)
Discussion started by: heaven25
5 Replies
9. UNIX for Advanced & Expert Users
All of my machines (various open source derivatives on x86 and amd64) store argv above the stack (at a higher memory address). I am curious to learn if any systems store argv below the stack (at a lower memory address).
I am particularly interested in proprietary Unices, such as Solaris, HP-UX,... (9 Replies)
Discussion started by: alister
9 Replies
10. UNIX for Dummies Questions & Answers
So i am trying to read in file
readFile <GivenFile> modFile
looking for a regular file under the directories in the GivenFile and print them out is my over all goal.
basically I am looking for anything that looks like a directory in the given file and printing it out.
Since I am trying to do... (2 Replies)
Discussion started by: squidGreen
2 Replies
LEARN ABOUT ULTRIX
getopt
getopt(3) Library Functions Manual getopt(3)
Name
getopt - get option letter from argument vector
Syntax
#include <stdio.h>
int getopt (argc, argv, optstring)
int argc;
char **argv;
char *optstring;
extern char *optarg;
extern int optind, opterr;
Description
The subroutine returns the next option letter in argv that matches a letter in optstring. The optstring is a string of recognized option
letters; if a letter is followed by a colon, the option is expected to have an argument that may or may not be separated from it by white
space. The optarg is set to point to the start of the option argument on return from
The function places in optind the argv index of the next argument to be processed. The external variable optind is automatically initial-
ized to 1 before the first call to
When all options have been processed (that is, up to the first non-option argument), returns EOF. The special option -- may be used to
delimit the end of the options; EOF will be returned, and -- will be skipped.
Diagnostics
The function prints an error message on stderr and returns a question mark (?) when it encounters an option letter that is not included in
optstring. Setting opterr to 0 disables this error message.
Examples
The following code fragment shows how one might process the arguments for a command that can take the mutually exclusive options a and b,
and the options f and o, both of which require arguments:
#include <stdio.h>
main (argc, argv)
int argc;
char **argv;
{
int c;
extern int optind, opterr;
extern char *optarg;
.
.
.
.
while ((c = getopt (argc, argv, "abf:o:")) != EOF)
switch (c) {
case 'a':
if (bflg)
errflg++;
else
aflg++;
break;
case 'b':
if (aflg)
errflg++;
else
bproc( );
break;
case 'f':
ifile = optarg;
break;
case 'o':
ofile = optarg;
bufsiza = 512;
break;
case '?':
errflg++;
}
if (errflg) {
fprintf (stderr, "usage: . . . ");
exit (2);
}
for ( ; optind < argc; optind++) {
if (access (argv[optind], 4)) {
.
.
.
}
See Also
getopt(1)
getopt(3)