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Code Issues Releases Activity

main: refuse to dump the result into tty

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Closes: https://codeberg.org/vyivel/dulcepan/issues/17
This commit is contained in:
Kirill Primak 2024-11-06 23:38:01 +03:00
parent c343fc1f73
commit d2620c60c5
1 changed files with 12 additions and 2 deletions
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14
src/main.c
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@ -1,6 +1,7 @@
#include <getopt.h> #include <getopt.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <unistd.h>
#include <wayland-client-core.h> #include <wayland-client-core.h>
#include <wayland-client-protocol.h> #include <wayland-client-protocol.h>
#include <xkbcommon/xkbcommon.h> #include <xkbcommon/xkbcommon.h>
@ -167,8 +168,9 @@ static void help(const char *prog) {
" -o <path> Specify the output file path.\n" " -o <path> Specify the output file path.\n"
"\n" "\n"
"If the output file path is not specified, the resuling image will be printed to\n" "If the output file path is not specified, the resuling image will be printed to\n"
"the standard output. If the output file format is not specified, it is guessed\n" "the standard output, which is expected to not be a terminal. If the output file\n"
"from the output file path if it's specified, and assumed to be PNG otherwise.\n" "format is not specified, it is guessed from the output file path if it's\n"
"specified, and assumed to be PNG otherwise.\n"
"\n" "\n"
"Supported formats: png, ppm.\n" "Supported formats: png, ppm.\n"
"\n" "\n"
@ -210,6 +212,14 @@ int main(int argc, char **argv) {
} }
} }
if (state.output_path == NULL && isatty(STDOUT_FILENO)) {
fprintf(stderr,
"Refusing to run as the standard output is a terminal and there's no output file\n"
"path specified.\n\n");
help(argv[0]);
exit(1);
}
if (state.output_format == DP_FILE_UNKNOWN) { if (state.output_format == DP_FILE_UNKNOWN) {
if (state.output_path != NULL) { if (state.output_path != NULL) {
const char *ext = dp_ext_from_path(state.output_path); const char *ext = dp_ext_from_path(state.output_path);