diff options
Diffstat (limited to 'src/user/app/init/shell.c')
| -rw-r--r-- | src/user/app/init/shell.c | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/src/user/app/init/shell.c b/src/user/app/init/shell.c deleted file mode 100644 index a6b9965..0000000 --- a/src/user/app/init/shell.c +++ /dev/null @@ -1,220 +0,0 @@ -#include "shell.h" -#include "tests/tests.h" -#include <camellia/syscalls.h> -#include <errno.h> -#include <stdbool.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -static bool isspace(char c) { - return c == ' ' || c == '\t' || c == '\n'; -} - -static char *strsplit(char *base, char delim) { - if (!base) return NULL; - while (*base) { - if (delim ? *base == delim : isspace(*base)) { - *base++ = '\0'; - return base; - } - base++; - } - return NULL; -} - -static char *strtrim(char *s) { - char *end; - if (!s) return NULL; - while (isspace(*s)) s++; - end = s + strlen(s); - while (end > s && isspace(end[-1])) end--; - *end = '\0'; - return s; -} - - -// TODO fgets -static int readline(char *buf, size_t max) { - char c = '\0'; - size_t pos = 0; - while (pos < (max-1) && c != '\n' && fread(&c, 1, 1, stdin)) - buf[pos++] = c; - buf[pos++] = '\0'; - return pos; -} - -static void cmd_cat_ls(const char *args, bool ls) { - FILE *file; - static char buf[512]; - int len; // first used for strlen(args), then length of buffer - - if (args) { - len = strlen(args); - memcpy(buf, args, len + 1); // no overflow check - the shell is just a PoC - - if (ls) { // paths to directories always have a trailing slash - if (buf[len-1] != '/') { - buf[len] = '/'; - buf[len+1] = '\0'; - } - } - - file = fopen(buf, "r"); - } else if (ls) { /* ls default argument */ - file = fopen("/", "r"); - } else { /* cat default argument */ - file = file_clone(stdin); - } - - if (!file) { - printf("couldn't open.\n"); - return; - } - - while (!feof(file)) { - int len = fread(buf, 1, sizeof buf, file); - if (len <= 0) break; - - if (ls) { - for (int i = 0; i < len; i++) - if (buf[i] == '\0') buf[i] = '\n'; - } - fwrite(buf, 1, len, stdout); - } - fclose(file); -} - -static void cmd_hexdump(const char *args) { - static uint8_t buf[512]; - int fd, len; - - fd = _syscall_open(args, strlen(args), 0); - if (fd < 0) { - printf("couldn't open.\n"); - return; - } - - len = _syscall_read(fd, buf, sizeof buf, 0); - for (int i = 0; i < len; i += 16) { - printf("%08x ", i); - - for (int j = i; j < i + 8 && j < len; j++) - printf("%02x ", buf[j]); - printf(" "); - for (int j = i + 8; j < i + 16 && j < len; j++) - printf("%02x ", buf[j]); - printf(" |"); - - for (int j = i; j < i + 16 && j < len; j++) { - char c = '.'; - if (0x20 <= buf[j] && buf[j] < 0x7f) c = buf[j]; - printf("%c", c); - } - printf("|\n"); - } - - close(fd); -} - -static void cmd_touch(const char *args) { - int fd = _syscall_open(args, strlen(args), OPEN_CREATE); - if (fd < 0) { - printf("couldn't create file.\n"); - return; - } - close(fd); -} - -void shell_loop(void) { - static char buf[256]; - int level = 0; - char *cmd, *args, *redir; - - for (;;) { - printf("%x$ ", level); - - readline(buf, 256); - if (feof(stdin)) - exit(0); - - cmd = strtrim(buf); - if (!*cmd) continue; - - redir = strtrim(strsplit(cmd, '>')); - cmd = strtrim(cmd); - args = strtrim(strsplit(cmd, 0)); - - /* "special" commands that can't be handled in a subprocess */ - if (!strcmp(cmd, "shadow")) { - _syscall_mount(-1, args, strlen(args)); - continue; - } else if (!strcmp(cmd, "exit")) { - exit(0); - continue; - } else if (!strcmp(cmd, "fork")) { - if (!fork()) level++; - else _syscall_await(); - continue; - } - - if (!fork()) { - if (redir && !freopen(redir, "w", stdout)) { - // TODO stderr - exit(0); - } - - if (!strcmp(cmd, "echo")) { - printf("%s\n", args); - } else if (!strcmp(cmd, "cat")) { - cmd_cat_ls(args, false); - } else if (!strcmp(cmd, "ls")) { - cmd_cat_ls(args, true); - } else if (!strcmp(cmd, "hexdump")) { - cmd_hexdump(args); - } else if (!strcmp(cmd, "catall")) { - const char *files[] = { - "/init/fake.txt", - "/init/1.txt", "/init/2.txt", - "/init/dir/3.txt", NULL}; - for (int i = 0; files[i]; i++) { - printf("%s:\n", files[i]); - cmd_cat_ls(files[i], false); - printf("\n"); - } - } else if (!strcmp(cmd, "touch")) { - cmd_touch(args); - } else if (!strcmp(cmd, "run_tests")) { - test_all(); - } else if (!strcmp(cmd, "stress")) { - stress_all(); - } else { - char *binname = cmd; - if (*cmd != '/') { - size_t cmdlen = strlen(cmd); - binname = malloc(cmdlen); - if (!binname) { - printf("sh: out of memory.\n"); - exit(1); - } - memcpy(binname, "/bin/", 5); - memcpy(binname + 5, cmd, cmdlen + 1); - } - - execv(binname, NULL); - if (errno == EINVAL) { - printf("%s isn't a valid executable\n", cmd); - } else { - printf("unknown command: %s\n", cmd); - } - - if (binname != cmd) - free(binname); - } - exit(0); - } else { - _syscall_await(); - } - } -} |