FreeCalypso > hg > freecalypso-tools
view ffstools/tiffs-rd/cat.c @ 619:f82551c77e58
libserial-newlnx: ASYNC_LOW_LATENCY patch reverted
Reports from Das Signal indicate that loadtools performance on Debian
is about the same as on Slackware, and that including or omitting the
ASYNC_LOW_LATENCY patch from Serg makes no difference. Because the
patch in question does not appear to be necessary, it is being reverted
until and unless someone other than Serg reports an actual real-world
system on which loadtools operation times are slowed compared to the
Mother's Slackware reference and on which Slackware-like performance
can be restored by setting the ASYNC_LOW_LATENCY flag.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Thu, 27 Feb 2020 01:09:48 +0000 |
parents | e7502631a0f9 |
children | 1f27fc13eab7 |
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/* * This C module implements the cat and catino commands. */ #include <sys/types.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include <unistd.h> #include "types.h" #include "struct.h" #include "globals.h" #include "pathname.h" int cat_mode; static u8 hex_buf[16]; static int hex_fill; static u32 hex_offset; cat_hex_flush() { int i, c; printf("%08X: ", hex_offset); for (i = 0; i < 16; i++) { if (i < hex_fill) printf("%02X ", hex_buf[i]); else fputs(" ", stdout); if (i == 7 || i == 15) putchar(' '); } for (i = 0; i < hex_fill; i++) { c = hex_buf[i]; if (c < ' ' || c > '~') c = '.'; putchar(c); } putchar('\n'); } cat_hex_byte(inb) { hex_buf[hex_fill++] = inb; if (hex_fill >= 16) { cat_hex_flush(); hex_offset += hex_fill; hex_fill = 0; } } void cat_chunk(ch) struct chunkinfo *ch; { u8 *p; int c; if (!ch->len) return; switch (cat_mode) { case 0: write(1, ch->start, ch->len); return; case 1: for (p = ch->start; p < ch->end; p++) { c = *p; if (c >= ' ' && c <= '~' || c == '\n') putchar(c); else { if (c & 0x80) { putchar('M'); putchar('-'); c &= 0x7F; } putchar('^'); if (c == 0x7F) putchar('?'); else putchar(c + '@'); } } return; case 2: for (p = ch->start; p < ch->end; p++) cat_hex_byte(*p); return; } } void cat_finish() { switch (cat_mode) { case 1: putchar('\n'); return; case 2: if (hex_fill) cat_hex_flush(); return; } } static void segment_cat_callback(inf, opaque) struct inode_info *inf; u_long opaque; { struct chunkinfo chi; size_extra_chunk(inf, &chi); cat_chunk(&chi); } cmd_cat(argc, argv) char **argv; { extern int optind; int c, headino; struct inode_info *inf; struct chunkinfo chi; optind = 0; while ((c = getopt(argc, argv, "hv")) != EOF) switch (c) { case 'h': cat_mode = 2; continue; case 'v': cat_mode = 1; continue; default: usage: fprintf(stderr, "usage: cat [-v|-h] pathname\n"); exit(1); } if (argc != optind + 1) goto usage; read_ffs_image(); find_inode_block(); alloc_inode_table(); find_root_inode(); headino = find_pathname(argv[optind]); inf = inode_info[headino]; switch (inf->type) { case 0xE1: case 0xF1: break; case 0xF2: fprintf(stderr, "error: the requested object is a directory\n"); exit(1); case 0xF3: fprintf(stderr, "error: the requested object is a symlink; use readlink instead of cat\n"); exit(1); default: fprintf(stderr, "error: unexpected object type %02X\n", inf->type); exit(1); } size_head_chunk(inf, &chi); cat_chunk(&chi); iterate_seg_file(headino, segment_cat_callback, 0L, 0, 0); cat_finish(); exit(0); } cmd_catino(argc, argv) char **argv; { extern int optind; int c, headino; struct inode_info *inf; struct chunkinfo chi; optind = 0; while ((c = getopt(argc, argv, "hv")) != EOF) switch (c) { case 'h': cat_mode = 2; continue; case 'v': cat_mode = 1; continue; default: usage: fprintf(stderr, "usage: catino [-v|-h] ino\n"); exit(1); } if (argc != optind + 1) goto usage; headino = strtoul(argv[optind], 0, 16); read_ffs_image(); find_inode_block(); alloc_inode_table(); if (!validate_inode(headino)) { fprintf(stderr, "catino: specified inode number is invalid\n"); exit(1); } inf = inode_info[headino]; switch (inf->type) { case 0x00: case 0xE1: case 0xF1: case 0xF3: break; case 0xF2: fprintf(stderr, "error: the requested object is a directory\n"); exit(1); default: fprintf(stderr, "error: unexpected object type %02X\n", inf->type); exit(1); } if (!inf->len) { fprintf(stderr, "error: requested inode has been reclaimed\n"); exit(1); } if (!validate_obj_name(headino, 0)) { fprintf(stderr, "error: no valid name at the beginning of the requested seghead chunk\n"); exit(1); } size_head_chunk(inf, &chi); cat_chunk(&chi); iterate_seg_file(headino, segment_cat_callback, 0L, !inf->type, 0); cat_finish(); exit(0); }