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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:21:29 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:21:29 +0000
commit29cd838eab01ed7110f3ccb2e8c6a35c8a31dbcc (patch)
tree63ef546b10a81d461e5cf5ed9e98a68cd7dee1aa /src/kash/main.c
parentInitial commit. (diff)
downloadkbuild-29cd838eab01ed7110f3ccb2e8c6a35c8a31dbcc.tar.xz
kbuild-29cd838eab01ed7110f3ccb2e8c6a35c8a31dbcc.zip
Adding upstream version 1:0.1.9998svn3589+dfsg.upstream/1%0.1.9998svn3589+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/kash/main.c')
-rw-r--r--src/kash/main.c494
1 files changed, 494 insertions, 0 deletions
diff --git a/src/kash/main.c b/src/kash/main.c
new file mode 100644
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--- /dev/null
+++ b/src/kash/main.c
@@ -0,0 +1,494 @@
+/* $NetBSD: main.c,v 1.48 2003/09/14 12:09:29 jmmv Exp $ */
+
+/*-
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Kenneth Almquist.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if 0
+#ifndef lint
+__COPYRIGHT("@(#) Copyright (c) 1991, 1993\n\
+ The Regents of the University of California. All rights reserved.\n");
+#endif /* not lint */
+#ifndef lint
+static char sccsid[] = "@(#)main.c 8.7 (Berkeley) 7/19/95";
+#else
+__RCSID("$NetBSD: main.c,v 1.48 2003/09/14 12:09:29 jmmv Exp $");
+#endif /* not lint */
+#endif
+
+#include <errno.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <locale.h>
+
+
+#include "shell.h"
+#include "main.h"
+#include "mail.h"
+#include "options.h"
+#include "output.h"
+#include "parser.h"
+#include "nodes.h"
+#include "expand.h"
+#include "eval.h"
+#include "jobs.h"
+#include "input.h"
+#include "trap.h"
+#include "var.h"
+#include "show.h"
+#include "memalloc.h"
+#include "error.h"
+#include "init.h"
+#include "mystring.h"
+#include "exec.h"
+#include "cd.h"
+#include "shinstance.h"
+
+#define PROFILE 0
+
+/*int rootpid;
+int rootshell;*/
+#ifdef unused_variables
+STATIC union node *curcmd;
+STATIC union node *prevcmd;
+#endif
+
+STATIC void read_profile(struct shinstance *, const char *);
+STATIC char *find_dot_file(struct shinstance *, char *);
+int main(int, char **, char **);
+SH_NORETURN_1 void shell_main(shinstance *, int, char **) SH_NORETURN_2;
+#ifdef _MSC_VER
+extern void init_syntax(void);
+#endif
+STATIC int usage(const char *argv0);
+STATIC int version(const char *argv0);
+
+/*
+ * Main routine. We initialize things, parse the arguments, execute
+ * profiles if we're a login shell, and then call cmdloop to execute
+ * commands. The setjmp call sets up the location to jump to when an
+ * exception occurs. When an exception occurs the variable "state"
+ * is used to figure out how far we had gotten.
+ */
+
+int
+#if K_OS == K_OS_WINDOWS && defined(SH_FORKED_MODE)
+real_main(int argc, char **argv, char **envp)
+#else
+main(int argc, char **argv, char **envp)
+#endif
+{
+ shinstance *psh;
+
+ /*
+ * Global initializations.
+ */
+ setlocale(LC_ALL, "");
+#ifdef _MSC_VER
+ init_syntax();
+#endif
+
+ /*
+ * Check for --version and --help.
+ */
+ if (argc > 1 && argv[1][0] == '-' && argv[1][1] == '-') {
+ if (!strcmp(argv[1], "--help"))
+ return usage(argv[0]);
+ if (!strcmp(argv[1], "--version"))
+ return version(argv[0]);
+ }
+
+ /*
+ * Create the root shell instance.
+ */
+ psh = sh_create_root_shell(argv, envp);
+ if (!psh)
+ return 2;
+ shthread_set_shell(psh);
+ shell_main(psh, argc, psh->orgargv);
+ /* Not reached. */
+ return 89;
+}
+
+SH_NORETURN_1 void
+shell_main(shinstance *psh, int argc, char **argv)
+{
+ struct jmploc jmploc;
+ struct stackmark smark;
+ volatile int state;
+ char *shinit;
+
+ state = 0;
+ if (setjmp(jmploc.loc)) {
+ /*
+ * When a shell procedure is executed, we raise the
+ * exception EXSHELLPROC to clean up before executing
+ * the shell procedure.
+ */
+ switch (psh->exception) {
+ case EXSHELLPROC:
+ psh->rootpid = /*getpid()*/ psh->pid;
+ psh->rootshell = 1;
+ psh->minusc = NULL;
+ state = 3;
+ break;
+
+ case EXEXEC:
+ psh->exitstatus = psh->exerrno;
+ break;
+
+ case EXERROR:
+ psh->exitstatus = 2;
+ break;
+
+ default:
+ break;
+ }
+
+ if (psh->exception != EXSHELLPROC) {
+ if (state == 0 || iflag(psh) == 0 || ! psh->rootshell)
+ exitshell(psh, psh->exitstatus);
+ }
+ reset(psh);
+ if (psh->exception == EXINT
+#if ATTY
+ && (! attyset(psh) || equal(termval(psh), "emacs"))
+#endif
+ ) {
+ out2c(psh, '\n');
+ flushout(&psh->errout);
+ }
+ popstackmark(psh, &smark);
+ FORCEINTON; /* enable interrupts */
+ if (state == 1)
+ goto state1;
+ else if (state == 2)
+ goto state2;
+ else if (state == 3)
+ goto state3;
+ else
+ goto state4;
+ }
+ psh->handler = &jmploc;
+ psh->rootpid = /*getpid()*/ psh->pid;
+ psh->rootshell = 1;
+#ifdef DEBUG
+#if DEBUG == 2
+ debug(psh) = 1;
+#endif
+ opentrace(psh);
+ trputs(psh, "Shell args: "); trargs(psh, argv);
+#endif
+
+ init(psh);
+ setstackmark(psh, &smark);
+ procargs(psh, argc, argv);
+ if (argv[0] && argv[0][0] == '-') {
+ state = 1;
+ read_profile(psh, "/etc/profile");
+state1:
+ state = 2;
+ read_profile(psh, ".profile");
+ }
+state2:
+ state = 3;
+ if (sh_getuid(psh) == sh_geteuid(psh) && sh_getgid(psh) == sh_getegid(psh)) {
+ if ((shinit = lookupvar(psh, "ENV")) != NULL && *shinit != '\0') {
+ state = 3;
+ read_profile(psh, shinit);
+ }
+ }
+state3:
+ state = 4;
+ if (sflag(psh) == 0 || psh->minusc) {
+ static int sigs[] = {
+ SIGINT, SIGQUIT, SIGHUP,
+#ifdef SIGTSTP
+ SIGTSTP,
+#endif
+ SIGPIPE
+ };
+#define SIGSSIZE (sizeof(sigs)/sizeof(sigs[0]))
+ unsigned i;
+
+ for (i = 0; i < SIGSSIZE; i++)
+ setsignal(psh, sigs[i]);
+ }
+
+ if (psh->minusc)
+ evalstring(psh, psh->minusc, 0);
+
+ if (sflag(psh) || psh->minusc == NULL) {
+state4: /* XXX ??? - why isn't this before the "if" statement */
+ cmdloop(psh, 1);
+ }
+ exitshell(psh, psh->exitstatus);
+ /* NOTREACHED */
+}
+
+
+/*
+ * Read and execute commands. "Top" is nonzero for the top level command
+ * loop; it turns on prompting if the shell is interactive.
+ */
+
+void
+cmdloop(struct shinstance *psh, int top)
+{
+ union node *n;
+ struct stackmark smark;
+ int inter;
+ int numeof = 0;
+
+ TRACE((psh, "cmdloop(%d) called\n", top));
+ setstackmark(psh, &smark);
+ for (;;) {
+ if (psh->pendingsigs)
+ dotrap(psh);
+ inter = 0;
+ if (iflag(psh) && top) {
+ inter = 1;
+ showjobs(psh, psh->out2, SHOW_CHANGED);
+ chkmail(psh, 0);
+ flushout(&psh->errout);
+ }
+ n = parsecmd(psh, inter);
+ /* showtree(n); DEBUG */
+ if (n == NEOF) {
+ if (!top || numeof >= 50)
+ break;
+ if (!stoppedjobs(psh)) {
+ if (!Iflag(psh))
+ break;
+ out2str(psh, "\nUse \"exit\" to leave shell.\n");
+ }
+ numeof++;
+ } else if (n != NULL && nflag(psh) == 0) {
+ psh->job_warning = (psh->job_warning == 2) ? 1 : 0;
+ numeof = 0;
+ evaltree(psh, n, 0);
+ }
+ popstackmark(psh, &smark);
+ setstackmark(psh, &smark);
+ if (psh->evalskip == SKIPFILE) {
+ psh->evalskip = 0;
+ break;
+ }
+ }
+ popstackmark(psh, &smark);
+}
+
+
+
+/*
+ * Read /etc/profile or .profile. Return on error.
+ */
+
+STATIC void
+read_profile(struct shinstance *psh, const char *name)
+{
+ int fd;
+ int xflag_set = 0;
+ int vflag_set = 0;
+
+ INTOFF;
+ if ((fd = shfile_open(&psh->fdtab, name, O_RDONLY, 0)) >= 0)
+ setinputfd(psh, fd, 1);
+ INTON;
+ if (fd < 0)
+ return;
+ /* -q turns off -x and -v just when executing init files */
+ if (qflag(psh)) {
+ if (xflag(psh))
+ xflag(psh) = 0, xflag_set = 1;
+ if (vflag(psh))
+ vflag(psh) = 0, vflag_set = 1;
+ }
+ cmdloop(psh, 0);
+ if (qflag(psh)) {
+ if (xflag_set)
+ xflag(psh) = 1;
+ if (vflag_set)
+ vflag(psh) = 1;
+ }
+ popfile(psh);
+}
+
+
+
+/*
+ * Read a file containing shell functions.
+ */
+
+void
+readcmdfile(struct shinstance *psh, char *name)
+{
+ int fd;
+
+ INTOFF;
+ if ((fd = shfile_open(&psh->fdtab, name, O_RDONLY, 0)) >= 0)
+ setinputfd(psh, fd, 1);
+ else
+ error(psh, "Can't open %s", name);
+ INTON;
+ cmdloop(psh, 0);
+ popfile(psh);
+}
+
+
+
+/*
+ * Take commands from a file. To be compatible we should do a path
+ * search for the file, which is necessary to find sub-commands.
+ */
+
+
+STATIC char *
+find_dot_file(struct shinstance *psh, char *basename)
+{
+ char *fullname;
+ const char *path = pathval(psh);
+
+ /* don't try this for absolute or relative paths */
+ if (strchr(basename, '/'))
+ return basename;
+
+ while ((fullname = padvance(psh, &path, basename)) != NULL) {
+ if (shfile_stat_isreg(&psh->fdtab, fullname) > 0) {
+ /*
+ * Don't bother freeing here, since it will
+ * be freed by the caller.
+ */
+ return fullname;
+ }
+ stunalloc(psh, fullname);
+ }
+
+ /* not found in the PATH */
+ error(psh, "%s: not found", basename);
+ /* NOTREACHED */
+ return NULL;
+}
+
+int
+dotcmd(struct shinstance *psh, int argc, char **argv)
+{
+ psh->exitstatus = 0;
+
+ if (argc >= 2) { /* That's what SVR2 does */
+ char * const savedcommandname = psh->commandname;
+ int const savedcommandnamemalloc = psh->commandnamemalloc;
+ char *fullname;
+ struct stackmark smark;
+
+ setstackmark(psh, &smark);
+ fullname = find_dot_file(psh, argv[1]);
+ setinputfile(psh, fullname, 1);
+ psh->commandname = fullname;
+ psh->commandnamemalloc = 0;
+ cmdloop(psh, 0);
+ popfile(psh);
+ psh->commandname = savedcommandname;
+ psh->commandnamemalloc = savedcommandnamemalloc;
+ popstackmark(psh, &smark);
+ }
+ return psh->exitstatus;
+}
+
+
+int
+exitcmd(struct shinstance *psh, int argc, char **argv)
+{
+ if (stoppedjobs(psh))
+ return 0;
+ if (argc > 1)
+ psh->exitstatus = number(psh, argv[1]);
+ exitshell(psh, psh->exitstatus);
+ /* NOTREACHED */
+ return 1;
+}
+
+
+STATIC const char *
+strip_argv0(const char *argv0, unsigned *lenp)
+{
+ const char *tmp;
+
+ /* skip the path */
+ for (tmp = strpbrk(argv0, "\\/:"); tmp; tmp = strpbrk(argv0, "\\/:"))
+ argv0 = tmp + 1;
+
+ /* find the end, ignoring extenions */
+ tmp = strrchr(argv0, '.');
+ if (!tmp)
+ tmp = strchr(argv0, '\0');
+ *lenp = (unsigned)(tmp - argv0);
+ return argv0;
+}
+
+STATIC int
+usage(const char *argv0)
+{
+ unsigned len;
+ argv0 = strip_argv0(argv0, &len);
+
+ fprintf(stdout,
+ "usage: %.*s [-aCefnuvxIimqVEb] [+aCefnuvxIimqVEb] [-o option_name]\n"
+ " [+o option_name] [command_file [argument ...]]\n"
+ " or: %.*s -c [-aCefnuvxIimqVEb] [+aCefnuvxIimqVEb] [-o option_name]\n"
+ " [+o option_name] command_string [command_name [argument ...]]\n"
+ " or: %.*s -s [-aCefnuvxIimqVEb] [+aCefnuvxIimqVEb] [-o option_name]\n"
+ " [+o option_name] [argument ...]\n"
+ " or: %.*s --help\n"
+ " or: %.*s --version\n",
+ len, argv0, len, argv0, len, argv0, len, argv0, len, argv0);
+ return 0;
+}
+
+STATIC int
+version(const char *argv0)
+{
+ unsigned len;
+ strip_argv0(argv0, &len);
+
+ fprintf(stdout,
+ "%.*s - kBuild version %d.%d.%d (r%u)\n",
+ len, argv0,
+ KBUILD_VERSION_MAJOR, KBUILD_VERSION_MINOR, KBUILD_VERSION_PATCH, KBUILD_SVN_REV);
+ return 0;
+}
+
+
+/*
+ * Local Variables:
+ * c-file-style: bsd
+ * End:
+ */