From 9d8085074991d5c0a42d6fc96a2d1a3ee918aad1 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 08:17:24 +0200 Subject: Adding upstream version 5.1. Signed-off-by: Daniel Baumann --- examples/loadables/cat.c | 122 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 examples/loadables/cat.c (limited to 'examples/loadables/cat.c') diff --git a/examples/loadables/cat.c b/examples/loadables/cat.c new file mode 100644 index 0000000..be99c4c --- /dev/null +++ b/examples/loadables/cat.c @@ -0,0 +1,122 @@ +/* + * cat replacement + * + * no options - the way cat was intended + */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with Bash. If not, see . +*/ + +#include +#include + +#include "builtins.h" +#include "shell.h" + +#ifndef errno +extern int errno; +#endif + +extern char *strerror (); +extern char **make_builtin_argv (); + +static int +fcopy(fd) +int fd; +{ + char buf[1024], *s; + int n, w, e; + + while (n = read(fd, buf, sizeof (buf))) { + w = write(1, buf, n); + if (w != n) { + e = errno; + write(2, "cat: write error: ", 18); + s = strerror(e); + write(2, s, strlen(s)); + write(2, "\n", 1); + return 1; + } + } + return 0; +} + +int +cat_main (argc, argv) +int argc; +char **argv; +{ + int i, fd, r; + char *s; + + if (argc == 1) + return (fcopy(0)); + + for (i = r = 1; i < argc; i++) { + if (argv[i][0] == '-' && argv[i][1] == '\0') + fd = 0; + else { + fd = open(argv[i], O_RDONLY, 0666); + if (fd < 0) { + s = strerror(errno); + write(2, "cat: cannot open ", 17); + write(2, argv[i], strlen(argv[i])); + write(2, ": ", 2); + write(2, s, strlen(s)); + write(2, "\n", 1); + continue; + } + } + r = fcopy(fd); + if (fd != 0) + close(fd); + } + return (r); +} + +int +cat_builtin(list) +WORD_LIST *list; +{ + char **v; + int c, r; + + v = make_builtin_argv(list, &c); + r = cat_main(c, v); + free(v); + + return r; +} + +char *cat_doc[] = { + "Display files.", + "", + "Read each FILE and display it on the standard output. If any", + "FILE is `-' or if no FILE argument is given, the standard input", + "is read.", + (char *)0 +}; + +struct builtin cat_struct = { + "cat", + cat_builtin, + BUILTIN_ENABLED, + cat_doc, + "cat [-] [file ...]", + 0 +}; -- cgit v1.2.3