user command 'file'

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December 1st, 2004, 12:05 PM

stoo23

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user command 'file'

Can anyone help me ...I have to mimic the output of when a user types say file text.c in a unix terminal to return --

text.c : ANSCII c program text
---------------------------------
const char * longfiletype(const char *name){

char tempfile[SIZE];
tmpnam (tmpfile);

char lfile[SIZE];
strcpy(lfile,'file');
strcat(lfile,name);
strcat(lfile,'>');
strcat(lfile,tmpfile);

system('lfile');
FILE * file = fopen(tmpfile, "r");

December 1st, 2004, 12:52 PM

Scorpions4ever

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Take out the quotes in the call to system. You need to call it like this:
system(lfile);

Also, for C, all the variables need to be declared on top of the block, so you can't declare FILE *file midway in the code. With C++, this is ok, but not in C.

Code:

char tempfile[SIZE];
char lfile[SOMESIZE];
char buf[SIZE];
FILE * file;

tmpnam (tmpfile);

strcpy(lfile,'file');
strcat(lfile,name);
strcat(lfile,'>');
strcat(lfile,tmpfile);

system(lfile);
file = fopen(tmpfile, "r");
fgets(buf, SIZE, file);
fclose(file);

/* Do something with buf here */

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December 1st, 2004, 01:52 PM

jasonvene

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stoo23:

I was trying to reply to your PM, but your inbox is full - system won't let you receive more PM until you clear some out.

December 2nd, 2004, 04:42 PM

guggach

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please stop this s..*ies
never heard about sprintf() and popen()
man pages are sure available

December 2nd, 2004, 07:44 PM