2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
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14 * notice, this list of conditions and the following disclaimer.
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22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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65 #include "myhistedit.h"
70 struct jmploc main_handler;
71 int localeisutf8, initial_localeisutf8;
73 static void reset(void);
74 static void cmdloop(int);
75 static void read_profile(const char *);
76 static char *find_dot_file(char *);
79 * Main routine. We initialize things, parse the arguments, execute
80 * profiles if we're a login shell, and then call cmdloop to execute
81 * commands. The setjmp call sets up the location to jump to when an
82 * exception occurs. When an exception occurs the variable "state"
83 * is used to figure out how far we had gotten.
87 main(int argc, char *argv[])
90 * As smark is accessed after a longjmp, it cannot be a local in main().
91 * The C standard specifies that the values of non-volatile local
92 * variables are unspecified after a jump if modified between the
95 static struct stackmark smark, smark2;
99 (void) setlocale(LC_ALL, "");
102 if (setjmp(main_handler.loc)) {
103 if (state == 0 || iflag == 0 || ! rootshell ||
105 exitshell(exitstatus);
107 if (exception == EXINT)
109 popstackmark(&smark);
110 FORCEINTON; /* enable interrupts */
120 handler = &main_handler;
123 trputs("Shell args: "); trargs(argv);
129 setstackmark(&smark);
130 setstackmark(&smark2);
131 procargs(argc, argv);
137 if (argv[0] && argv[0][0] == '-') {
139 read_profile("/etc/profile");
143 read_profile("${HOME-}/.profile");
145 read_profile("/etc/suid_profile");
149 if (!privileged && iflag) {
150 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
152 read_profile(shinit);
161 popstackmark(&smark2);
163 evalstring(minusc, sflag ? 0 : EV_EXIT);
166 if (sflag || minusc == NULL) {
169 exitshell(exitstatus);
182 * Read and execute commands. "Top" is nonzero for the top level command
183 * loop; it turns on prompting if the shell is interactive.
190 struct stackmark smark;
194 TRACE(("cmdloop(%d) called\n", top));
195 setstackmark(&smark);
202 showjobs(1, SHOWJOBS_DEFAULT);
207 /* showtree(n); DEBUG */
209 if (!top || numeof >= 50)
211 if (!stoppedjobs()) {
214 out2fmt_flush("\nUse \"exit\" to leave shell.\n");
217 } else if (n != NULL && nflag == 0) {
218 job_warning = (job_warning == 2) ? 1 : 0;
222 popstackmark(&smark);
223 setstackmark(&smark);
225 if (evalskip == SKIPRETURN)
230 popstackmark(&smark);
240 * Read /etc/profile or .profile. Return on error.
244 read_profile(const char *name)
247 const char *expandedname;
248 int oflags = O_RDONLY | O_CLOEXEC;
253 expandedname = expandstr(name);
254 if (expandedname == NULL)
257 if ((fd = open(expandedname, oflags)) >= 0)
269 * Read a file containing shell functions.
273 readcmdfile(const char *name, int verify)
275 setinputfile(name, 1, verify);
283 * Take commands from a file. To be compatible we should do a path
284 * search for the file, which is necessary to find sub-commands.
289 find_dot_file(char *basename)
293 const char *path = pathval();
296 /* don't try this for absolute or relative paths */
297 if( strchr(basename, '/'))
300 while ((fullname = padvance(&path, &opt, basename)) != NULL) {
301 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
303 * Don't bother freeing here, since it will
304 * be freed by the caller.
314 dotcmd(int argc, char **argv)
316 char *filename, *fullname;
319 error("missing filename");
324 * Because we have historically not supported any options,
325 * only treat "--" specially.
327 filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1];
329 fullname = find_dot_file(filename);
330 setinputfile(fullname, 1, -1 /* verify */);
331 commandname = fullname;
339 exitcmd(int argc, char **argv)
344 exitshell(number(argv[1]));
346 exitshell_savedstatus();