huge-string.c

huge-string.c

#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/sysctl.h>

#include <libxo/xo.h>
#include <stdio.h>

int main(int argc, char** argv)
{
    int id[CTL_MAXNAME];
    size_t idlevel= CTL_MAXNAME;
    void *value;
    size_t valuelen;
    int fd, rc;

    atexit(xo_finish_atexit);

    xo_set_flags(NULL, XOF_FLUSH);
    argc = xo_parse_args(argc, argv);
    if (argc < 0)
	exit(EXIT_FAILURE);

    if (argc < 1)
	xo_err(1, "missing name");

    fd = open(argv[1], O_RDONLY);
    if (fd < 0)
	xo_err(1, "could not open: %s", argv[1]);

    struct stat st;
    if (fstat(fd, &st) < 0)
	xo_err(1, "stat failed: %m");
    valuelen = st.st_size;

    value = malloc(valuelen);
    if (value == NULL)
	xo_err(1, "malloc error");

    rc = read(fd, value, valuelen);
    if (rc < 0)
	xo_err(1, "read failed");

    xo_emit("{:valuelen/%lu}", valuelen);
    xo_emit("{:value/%s}", (char *) value);
    xo_emit("{:valuelen/%lu}", valuelen);
    xo_emit("{L:\n}");

    return 0;
}