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authorCameron Katri <me@cameronkatri.com>2021-05-09 14:20:58 -0400
committerCameron Katri <me@cameronkatri.com>2021-05-09 14:20:58 -0400
commit5fd83771641d15c418f747bd343ba6738d3875f7 (patch)
tree5abf0f78f680d9837dbd93d4d4c3933bb7509599 /adv_cmds/ps/fmt.c
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Diffstat (limited to 'adv_cmds/ps/fmt.c')
-rw-r--r--adv_cmds/ps/fmt.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/adv_cmds/ps/fmt.c b/adv_cmds/ps/fmt.c
new file mode 100644
index 0000000..26ba3dc
--- /dev/null
+++ b/adv_cmds/ps/fmt.c
@@ -0,0 +1,132 @@
+/*-
+ * Copyright (c) 1992, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * 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.
+ * 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.
+ */
+
+#if 0
+#ifndef lint
+static char sccsid[] = "@(#)fmt.c 8.4 (Berkeley) 4/15/94";
+#endif
+#endif
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/bin/ps/fmt.c,v 1.34 2004/06/22 02:18:29 gad Exp $");
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+
+#include <err.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <vis.h>
+
+#include "ps.h"
+
+static char *cmdpart(char *);
+static char *shquote(char **);
+
+static char *
+shquote(char **argv)
+{
+ long arg_max;
+ static size_t buf_size;
+ size_t len;
+ char **p, *dst, *src;
+ static char *buf = NULL;
+
+ if (buf == NULL) {
+ if ((arg_max = sysconf(_SC_ARG_MAX)) == -1)
+ errx(1, "sysconf _SC_ARG_MAX failed");
+ if (arg_max >= LONG_MAX / 4 || arg_max >= (long)(SIZE_MAX / 4))
+ errx(1, "sysconf _SC_ARG_MAX preposterously large");
+ buf_size = 4 * arg_max + 1;
+ if ((buf = malloc(buf_size)) == NULL)
+ errx(1, "malloc failed");
+ }
+
+ if (*argv == NULL) {
+ buf[0] = '\0';
+ return (buf);
+ }
+ dst = buf;
+ for (p = argv; (src = *p++) != NULL; ) {
+ if (*src == '\0')
+ continue;
+ len = (buf_size - 1 - (dst - buf)) / 4;
+ strvisx(dst, src, strlen(src) < len ? strlen(src) : len,
+ VIS_NL | VIS_CSTYLE);
+ while (*dst != '\0')
+ dst++;
+ if ((buf_size - 1 - (dst - buf)) / 4 > 0)
+ *dst++ = ' ';
+ }
+ /* Chop off trailing space */
+ if (dst != buf && dst[-1] == ' ')
+ dst--;
+ *dst = '\0';
+ return (buf);
+}
+
+static char *
+cmdpart(char *arg0)
+{
+ char *cp;
+
+ return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0);
+}
+
+const char *
+fmt_argv(char **argv, char *cmd, size_t maxlen)
+{
+ size_t len;
+ char *ap, *cp;
+
+ if (argv == NULL || argv[0] == NULL) {
+ if (cmd == NULL)
+ return ("");
+ ap = NULL;
+ len = maxlen + 3;
+ } else {
+ ap = shquote(argv);
+ len = strlen(ap) + maxlen + 4;
+ }
+ cp = malloc(len);
+ if (cp == NULL)
+ errx(1, "malloc failed");
+ if (ap == NULL)
+ sprintf(cp, "[%.*s]", (int)maxlen, cmd);
+ else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0)
+ sprintf(cp, "%s (%.*s)", ap, (int)maxlen, cmd);
+ else
+ strcpy(cp, ap);
+ return (cp);
+}