Hi All,
I've written a simple C program that executes linux shell commands and
returns an output. I export the C program to library and use it in C#
project.
Following is the code that works on windows
#include <stdio.h>
#include "libserverusage.h"
#define DllExport __declspec( dllexport )
DllExport int GetServerUsage()
{
int usage = 1;
#if LINUX
FILE * fp;
char buf[1024];
int n = 0;
char * cmd = "vmstat | gawk '/0/ {tot=tot+1; id=id+$16} END {print 100 -
id/tot}'";
fp = popen(cmd,"r");
n = fread(buf,1,sizeof(buf),fp);
buf[n] = '\0';
/* printf("%s\n", buf);
printf("Characters read: %d\n\n", n);
*/
fclose(fp);
usage = atoi(buf);
#endif
return usage;
}
But when i try to compile it on linux, i get these errors:
libserverusage.c: In function `__declspec':
libserverusage.c:33: error: parse error before '{' token
libserverusage.c:39: error: parameter `n' is initialized
libserverusage.c:40: error: parameter `cmd' is initialized
libserverusage.c:41: error: parse error before "fp"
libserverusage.c:40: error: declaration for parameter `cmd' but no such
parameter
libserverusage.c:39: error: declaration for parameter `n' but no such
parameter
libserverusage.c:38: error: declaration for parameter `buf' but no such
parameter
libserverusage.c:37: error: declaration for parameter `fp' but no such
parameter
libserverusage.c:33: error: declaration for parameter `GetServerUsage' but
no such parameter
BTW the code compiles with gcc compiler, if i copy the contents of this
function to main method.
This is how i compile my code:
gcc -DLINUX -shared -fPIC -Wall -O2 libserverusage.c -o
../bin/Release/libserverusage.so
Can someone help me fix this?
Thanks,
Romy
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