diff options
| author | dzwdz | 2022-08-19 15:37:42 +0200 |
|---|---|---|
| committer | dzwdz | 2022-08-19 15:37:42 +0200 |
| commit | 05f93a814a9b5fa6b0f3223fc51566c84b92d158 (patch) | |
| tree | b430bda5fd26c3cd7e273eda31171bf94100f9f1 /src/user/app/shell | |
| parent | 0ed2f796d7723af8321f35d4ef5e6781ea41e36d (diff) | |
user/libc: fextflags, add nonbuffering mode for fread
useful for e.g. `hexdump -r /kdev/eth` to see packets as they come in
Diffstat (limited to 'src/user/app/shell')
| -rw-r--r-- | src/user/app/shell/builtins.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/user/app/shell/builtins.c b/src/user/app/shell/builtins.c index 4a7b79c..23a8221 100644 --- a/src/user/app/shell/builtins.c +++ b/src/user/app/shell/builtins.c @@ -26,6 +26,7 @@ static void cmd_cat(int argc, char **argv) { eprintf("couldn't open %s", argv[i]); return; } + if (!strcmp(argv[i], "!stdin")) fextflags(file, FEXT_NOFILL); for (;;) { int len = fread(buf, 1, sizeof buf, file); if (len <= 0) break; @@ -76,10 +77,11 @@ void cmd_hexdump(int argc, char **argv) { bool canonical = !strcmp(argv[0], "hd"); size_t readlen = ~0; size_t pos = 0; + bool raw = false; int c; optind = 0; - while ((c = getopt(argc, argv, "Cn:s:")) != -1) { + while ((c = getopt(argc, argv, "Cn:s:r")) != -1) { switch (c) { case 'C': canonical = true; @@ -90,6 +92,9 @@ void cmd_hexdump(int argc, char **argv) { case 's': pos = strtol(optarg, NULL, 0); break; + case 'r': /* "raw" mode, print data as soon as it's read without buffering */ + raw = true; + break; default: return; } @@ -103,6 +108,7 @@ void cmd_hexdump(int argc, char **argv) { eprintf("couldn't open %s", argv[optind]); return; } + if (raw) fextflags(file, FEXT_NOFILL); fseek(file, pos, SEEK_SET); bool skipped = false; while (pos < readlen) { |