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/*
Test code for line based I/O over fds
Copyright (C) Amitay Isaacs 2018
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
#include "system/filesys.h"
#include <talloc.h>
#include <assert.h>
#include "common/line.c"
static int line_print(char *line, void *private_data)
{
printf("%s\n", line);
fflush(stdout);
return 0;
}
int main(int argc, const char **argv)
{
TALLOC_CTX *mem_ctx;
size_t hint = 32;
pid_t pid;
int ret, lines = 0;
int pipefd[2];
if (argc < 2 || argc > 3) {
fprintf(stderr, "Usage: %s <filename> [<hint>]\n", argv[0]);
exit(1);
}
if (argc == 3) {
long value;
value = atol(argv[2]);
assert(value > 0);
hint = value;
}
ret = pipe(pipefd);
assert(ret == 0);
pid = fork();
assert(pid != -1);
if (pid == 0) {
char buffer[16];
ssize_t n, n2;
int fd;
close(pipefd[0]);
fd = open(argv[1], O_RDONLY);
assert(fd != -1);
while (1) {
n = read(fd, buffer, sizeof(buffer));
assert(n >= 0 && n <= sizeof(buffer));
if (n == 0) {
break;
}
n2 = write(pipefd[1], buffer, n);
assert(n2 == n);
}
close(pipefd[1]);
close(fd);
exit(0);
}
close(pipefd[1]);
mem_ctx = talloc_new(NULL);
assert(mem_ctx != NULL);
ret = line_read(pipefd[0], hint, NULL, line_print, NULL, &lines);
assert(ret == 0);
talloc_free(mem_ctx);
return lines;
}
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