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Description:

Successful read and write calls may only partly complete if a signal is received or they are not operating on a normal file.

read_all() and write_all() do the looping for you.

Example:

#include <err.h>
#include <stdio.h>
#include <unistd.h>
#include <ccan/read_write_all/read_write_all.h>

#define BUFFER_SIZE 10
int main(int argc, char *argv[])
{
        char buffer[BUFFER_SIZE+1];

        if (!read_all(STDIN_FILENO, buffer, BUFFER_SIZE))
                err(1, "Could not read %u characters", BUFFER_SIZE);
        buffer[BUFFER_SIZE] = '\0';
        printf("I read '%.*s'\n", BUFFER_SIZE, buffer);
        return 0;
}

License: