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EtherCat
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print strerror descriptions in error messages instead of errno

master
BodgeMaster 2025-02-06 11:28:49 +01:00
parent 77542aa220
commit 1871098942
1 changed files with 9 additions and 9 deletions
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18
ethercat.c
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@ -51,23 +51,23 @@ int main(int argc, char** argv) {
} }
if (freopen(NULL, "rb", stdin) == NULL) { if (freopen(NULL, "rb", stdin) == NULL) {
fprintf(stderr, "Failed to set stdin to binary mode: %i\n", errno); fprintf(stderr, "Failed to set stdin to binary mode: %s\n", strerror(errno));
return EXIT_RUNTIME; return EXIT_RUNTIME;
} }
stdin_dup = dup(fileno(stdin)); stdin_dup = dup(fileno(stdin));
if (stdin_dup == -1) { if (stdin_dup == -1) {
fprintf(stderr, "Failed to dup() stdin: %i\n", errno); fprintf(stderr, "Failed to dup() stdin: %s\n", strerror(errno));
} }
if (freopen(NULL, "wb", stdout) == NULL) { if (freopen(NULL, "wb", stdout) == NULL) {
fprintf(stderr, "Failed to set stdout to binary mode: %i\n", errno); fprintf(stderr, "Failed to set stdout to binary mode: %s\n", strerror(errno));
return EXIT_RUNTIME; return EXIT_RUNTIME;
} }
file_descriptor = open(DEVICE_NODE_TUN, O_RDWR | O_NONBLOCK); file_descriptor = open(DEVICE_NODE_TUN, O_RDWR | O_NONBLOCK);
if (file_descriptor == -1) { if (file_descriptor == -1) {
fprintf(stderr, "Failed to open %s: %i\n", DEVICE_NODE_TUN, errno); fprintf(stderr, "Failed to open %s: %s\n", DEVICE_NODE_TUN, strerror(errno));
return EXIT_RUNTIME; return EXIT_RUNTIME;
} }
@ -76,7 +76,7 @@ int main(int argc, char** argv) {
strncpy(ifr.ifr_name, argv[1], IFNAMSIZ); strncpy(ifr.ifr_name, argv[1], IFNAMSIZ);
if (ioctl(file_descriptor, TUNSETIFF, &ifr) == -1) { if (ioctl(file_descriptor, TUNSETIFF, &ifr) == -1) {
fprintf(stderr, "An error occurred while trying to ioctl: %i\n", errno); fprintf(stderr, "An error occurred while trying to ioctl: %s\n", strerror(errno));
close(file_descriptor); close(file_descriptor);
return EXIT_RUNTIME; return EXIT_RUNTIME;
} }
@ -90,7 +90,7 @@ int main(int argc, char** argv) {
while (fcntl(file_descriptor, F_GETFD) != -1 && !stop_now) { while (fcntl(file_descriptor, F_GETFD) != -1 && !stop_now) {
read_size = read(file_descriptor, buffer, BUFFER_SIZE); read_size = read(file_descriptor, buffer, BUFFER_SIZE);
if (read_size == -1) { if (read_size == -1) {
fprintf(stderr, "Failed to read from tap: %i\n", errno); fprintf(stderr, "Failed to read from tap: %s\n", strerror(errno));
yeet(file_descriptor); yeet(file_descriptor);
return EXIT_RUNTIME; return EXIT_RUNTIME;
} }
@ -102,7 +102,7 @@ int main(int argc, char** argv) {
// using read_size as the amount of remaining bytes // using read_size as the amount of remaining bytes
write_size = write(fileno(stdout), buffer, read_size); write_size = write(fileno(stdout), buffer, read_size);
if (write_size == -1) { if (write_size == -1) {
fprintf(stderr, "Failed to write stdout: %i\n", errno); fprintf(stderr, "Failed to write stdout: %s\n", strerror(errno));
yeet(file_descriptor); yeet(file_descriptor);
return EXIT_RUNTIME; return EXIT_RUNTIME;
} }
@ -110,7 +110,7 @@ int main(int argc, char** argv) {
just_created_dup = false; just_created_dup = false;
read_size = read(stdin_dup, buffer, BUFFER_SIZE); read_size = read(stdin_dup, buffer, BUFFER_SIZE);
if (read_size == -1) { if (read_size == -1) {
fprintf(stderr, "Failed to read from stdin: %i\n", errno); fprintf(stderr, "Failed to read from stdin: %s\n", strerror(errno));
yeet(file_descriptor); yeet(file_descriptor);
return EXIT_RUNTIME; return EXIT_RUNTIME;
} }
@ -125,7 +125,7 @@ int main(int argc, char** argv) {
) { ) {
write_size = write(file_descriptor, buffer, read_size); write_size = write(file_descriptor, buffer, read_size);
if (write_size == -1) { if (write_size == -1) {
fprintf(stderr, "Failed to write stdout: %i\n", errno); fprintf(stderr, "Failed to write stdout: %s\n", strerror(errno));
yeet(file_descriptor); yeet(file_descriptor);
return EXIT_RUNTIME; return EXIT_RUNTIME;
} }