BSD 4.4 Lite Usr.bin Sources

1 files changed, 234 insertions, 0 deletions

diff --git a/usr.bin/apply/apply.c b/usr.bin/apply/apply.c
new file mode 100644
index 0000000..a8634a9
--- /dev/null
+++ b/usr.bin/apply/apply.c
@@ -0,0 +1,234 @@
+/*-
+ * Copyright (c) 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry.
+ *
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)apply.c	8.4 (Berkeley) 4/4/94";
+#endif /* not lint */
+
+#include <sys/wait.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <paths.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+void	usage __P((void));
+int	system __P((const char *));
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	int ch, clen, debug, i, l, magic, n, nargs, rval;
+	char *c, *cmd, *p, *q;
+
+	debug = 0;
+	magic = '%';		/* Default magic char is `%'. */
+	nargs = -1;
+	while ((ch = getopt(argc, argv, "a:d0123456789")) != EOF)
+		switch (ch) {
+		case 'a':
+			if (optarg[1] != '\0')
+				errx(1,
+				    "illegal magic character specification.");
+			magic = optarg[0];
+			break;
+		case 'd':
+			debug = 1;
+			break;
+		case '0': case '1': case '2': case '3': case '4':
+		case '5': case '6': case '7': case '8': case '9':
+			if (nargs != -1)
+				errx(1,
+				    "only one -# argument may be specified.");
+			nargs = optopt - '0';
+			break;
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	if (argc < 2)
+		usage();
+
+	/*
+	 * The command to run is argv[0], and the args are argv[1..].
+	 * Look for %digit references in the command, remembering the
+	 * largest one.
+	 */
+	for (n = 0, p = argv[0]; *p != '\0'; ++p)
+		if (p[0] == magic && isdigit(p[1]) && p[1] != '0') {
+			++p;
+			if (p[0] - '0' > n)
+				n = p[0] - '0';
+		}
+
+	/*
+	 * If there were any %digit references, then use those, otherwise
+	 * build a new command string with sufficient %digit references at
+	 * the end to consume (nargs) arguments each time round the loop.
+	 * Allocate enough space to hold the maximum command.
+	 */
+	if ((cmd = malloc(sizeof("exec ") - 1 +
+	    strlen(argv[0]) + 9 * (sizeof(" %1") - 1) + 1)) == NULL)
+		err(1, NULL);
+		
+	if (n == 0) {
+		/* If nargs not set, default to a single argument. */
+		if (nargs == -1)
+			nargs = 1;
+
+		p = cmd;
+		p += sprintf(cmd, "exec %s", argv[0]);
+		for (i = 1; i <= nargs; i++)
+			p += sprintf(p, " %c%d", magic, i);
+
+		/*
+		 * If nargs set to the special value 0, eat a single
+		 * argument for each command execution.
+		 */
+		if (nargs == 0)
+			nargs = 1;
+	} else {
+		(void)sprintf(cmd, "exec %s", argv[0]);
+		nargs = n;
+	}
+
+	/*
+	 * Grab some space in which to build the command.  Allocate
+	 * as necessary later, but no reason to build it up slowly
+	 * for the normal case.
+	 */
+	if ((c = malloc(clen = 1024)) == NULL)
+		err(1, NULL);
+
+	/*
+	 * (argc) and (argv) are still offset by one to make it simpler to
+	 * expand %digit references.  At the end of the loop check for (argc)
+	 * equals 1 means that all the (argv) has been consumed.
+	 */
+	for (rval = 0; argc > nargs; argc -= nargs, argv += nargs) {
+		/*
+		 * Find a max value for the command length, and ensure
+		 * there's enough space to build it.
+		 */
+		for (l = strlen(cmd), i = 0; i < nargs; i++)
+			l += strlen(argv[i]);
+		if (l > clen && (c = realloc(c, clen = l)) == NULL)
+			err(1, NULL);
+
+		/* Expand command argv references. */
+		for (p = cmd, q = c; *p != '\0'; ++p)
+			if (p[0] == magic && isdigit(p[1]) && p[1] != '0')
+				q += sprintf(q, "%s", argv[(++p)[0] - '0']);
+			else
+				*q++ = *p;
+
+		/* Terminate the command string. */
+		*q = '\0';
+
+		/* Run the command. */
+		if (debug)
+			(void)printf("%s\n", c);
+		else
+			if (system(c))
+				rval = 1;
+	}
+
+	if (argc != 1)
+		errx(1, "expecting additional argument%s after \"%s\"",
+		    (nargs - argc) ? "s" : "", argv[argc - 1]);
+	exit(rval);
+}
+
+/*
+ * system --
+ * 	Private version of system(3).  Use the user's SHELL environment
+ *	variable as the shell to execute.
+ */
+int
+system(command)
+	const char *command;
+{
+	static char *name, *shell;
+	union wait pstat;
+	pid_t pid;
+	int omask;
+	sig_t intsave, quitsave;
+
+	if (shell == NULL) {
+		if ((shell = getenv("SHELL")) == NULL)
+			shell = _PATH_BSHELL;
+		if ((name = strrchr(shell, '/')) == NULL)
+			name = shell;
+		else
+			++name;
+	}
+	if (!command)		/* just checking... */
+		return(1);
+
+	omask = sigblock(sigmask(SIGCHLD));
+	switch(pid = vfork()) {
+	case -1:			/* error */
+		err(1, "fork");
+	case 0:				/* child */
+		(void)sigsetmask(omask);
+		execl(shell, name, "-c", command, NULL);
+		err(1, "%s", shell);
+	}
+	intsave = signal(SIGINT, SIG_IGN);
+	quitsave = signal(SIGQUIT, SIG_IGN);
+	pid = waitpid(pid, (int *)&pstat, 0);
+	(void)sigsetmask(omask);
+	(void)signal(SIGINT, intsave);
+	(void)signal(SIGQUIT, quitsave);
+	return(pid == -1 ? -1 : pstat.w_status);
+}
+
+void
+usage()
+{
+
+	(void)fprintf(stderr,
+	    "usage: apply [-a magic] [-0123456789] command arguments ...\n");
+	exit(1);
+}