@lia
In Linux, system calls are typically made using the C programming language. To pass parameters to a system call, you need to follow these steps:
Here's a basic example of passing parameters to the open()
system call, which opens a file:
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#include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> int main() { // Declare variables char filename[] = "example.txt"; int flags = O_RDONLY; mode_t mode = S_IRUSR; // Make the system call int fileDescriptor = open(filename, flags, mode); // Check if open was successful if (fileDescriptor == -1) { // Handle error } else { // Use the file descriptor } return 0; } |
In this example, the open()
system call is made with three parameters: filename
(name of the file to open), flags
(specifying the open mode), and mode
(specifying the file permissions).