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/*
* Copyright (c) 2022 Firebuild Inc.
* All rights reserved.
*
* Free for personal use and commercial trial.
* Non-trial commercial use requires licenses available from https://firebuild.com.
* Modification and redistribution are permitted, but commercial use of derivative
* works is subject to the same requirements of this license
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/* Performs a popen() / pclose() pair.
* The command (to be passed to "sh -c") is taken from the first command line parameter,
* the pipe type is taken from the second.
* Returns 0 (unless an error occurred), not the command's exit code. */
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
int main(int argc, char *argv[]) {
if (argc != 3) {
fprintf(stderr, "need exactly 2 arguments\n");
return 1;
}
FILE *f = popen(argv[1], argv[2]);
if (f == NULL) {
perror("popen");
return 1;
}
char buf[4096];
ssize_t n;
if ((fcntl(fileno(f), F_GETFL) & O_ACCMODE) == O_RDONLY) {
while ((n = fread(buf, 1, sizeof(buf), f)) > 0) {
fwrite(buf, 1, n, stdout);
}
} else {
while ((n = fread(buf, 1, sizeof(buf), stdin)) > 0) {
fwrite(buf, 1, n, f);
}
}
if (pclose(f) < 0) {
perror("pclose");
return 1;
}
return 0;
}
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