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fix experimental_lib/example_c/test_grab: no fork&pipe needed, use pm3_grabbed_output_get

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This commit is contained in:
Philippe Teuwen 2024-09-09 23:57:32 +02:00
commit b91f7742c1
2 changed files with 26 additions and 52 deletions
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2
client/experimental_lib/example_c/test.c
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@ -9,6 +9,6 @@ int main(int argc, char *argv[]) {
}
pm3 *p;
p = pm3_open(argv[1]);
pm3_console(p, "hw status");
pm3_console(p, "hw status", true);
pm3_close(p);
}

76
client/experimental_lib/example_c/test_grab.c
View file

@ -6,8 +6,7 @@
int main(int argc, char *argv[]) {
int pipefd[2];
char buf[8196 + 1];
// char buf[8196 + 1];
size_t n;
if (argc < 2) {
@ -15,60 +14,35 @@ int main(int argc, char *argv[]) {
exit(-1);
}
if (pipe(pipefd) == -1) {
exit(-1);
}
pm3 *p;
p = pm3_open(argv[1]);
int pid = fork();
if (pid == -1) {
perror("fork");
exit(-1);
}
// Execute the command
pm3_console(p, "hw status", false);
// child
if (pid == 0) {
printf("[INFO] inside child\n");
const char *buf = pm3_grabbed_output_get(p);
const char *line_start = buf;
const char *newline_pos;
while ((newline_pos = strchr(line_start, '\n')) != NULL) {
// Determine the length of the line
size_t line_length = newline_pos - line_start;
// Redirect stdout to the write end of the pipe
dup2(pipefd[1], STDOUT_FILENO);
// Create a temporary buffer to hold the line
char line[line_length + 1];
strncpy(line, line_start, line_length);
line[line_length] = '\0'; // Null-terminate the string
close(pipefd[0]); // Child: close read end of the pipe
close(pipefd[1]); // Close original write end
pm3 *p;
p = pm3_open(argv[1]);
// Execute the command
pm3_console(p, "hw status");
pm3_close(p);
_exit(-1);
} else {
printf("[INFO] inside parent\n");
// Parent: close write end of the pipe
close(pipefd[1]);
// Read from the pipe
while (1) {
n = read(pipefd[0], buf, sizeof(buf));
if (n == -1) {
continue;
}
if (n == 0) {
break;
} else {
// null termination
buf[n] = 0;
if (strstr(buf, "ERROR") != NULL) {
printf("%s", buf);
}
if (strstr(buf, "Unique ID") != NULL) {
printf("%s", buf);
}
}
if (strstr(line, "ERROR") != NULL) {
printf("%s", line);
}
if (strstr(line, "Unique ID") != NULL) {
printf("%s", line);
}
// Close read end
close(pipefd[0]);
// Move to the next line
line_start = newline_pos + 1;
}
pm3_close(p);
}