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Userland: Add syscall -l option and man page

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This commit is contained in:
Mauri de Souza Nunes 2019-12-24 09:37:41 -03:00 • committed by Andreas Kling
parent b6eba388e3
commit cb4e51a7a5
2 changed files with 71 additions and 4 deletions
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13
Userland/syscall.cpp
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@ -29,16 +29,21 @@ int main(int argc, char** argv)
{
int oflag;
int opt;
while ((opt = getopt(argc, argv, "oh")) != -1) {
while ((opt = getopt(argc, argv, "olh")) != -1) {
switch (opt) {
case 'o':
oflag = 1;
break;
case 'l':
for (auto sc : syscall_table) {
fprintf(stdout, "%s ", Syscall::to_string(sc));
}
return EXIT_SUCCESS;
case 'h':
fprintf(stderr, "usage: \tsyscall [-o] entry [args; buf==BUFSIZ buffer]\n");
fprintf(stderr, "usage: \tsyscall [-o] [-l] [-h] <syscall-name> <args...> [buf==BUFSIZ buffer]\n");
fprintf(stderr, "\tsyscall write 1 hello 5\n");
fprintf(stderr, "\tsyscall -o read 0 buf 5\n");
fprintf(stderr, "\tsyscall -o getcwd buf 100\n");
fprintf(stderr, "\tsyscall sleep 3\n");
break;
default:
exit(EXIT_FAILURE);
@ -61,7 +66,7 @@ int main(int argc, char** argv)
perror("syscall");
} else {
if (oflag)
printf("%s", buf);
fwrite(buf, 1, sizeof(buf), stdout);
}
fprintf(stderr, "Syscall return: %d\n", rc);