diff options
Diffstat (limited to 'bin/ps/fmt.c')
| -rw-r--r-- | bin/ps/fmt.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/bin/ps/fmt.c b/bin/ps/fmt.c new file mode 100644 index 000000000000..c89ea78d7373 --- /dev/null +++ b/bin/ps/fmt.c @@ -0,0 +1,139 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * 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. + * 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 +static char sccsid[] = "@(#)fmt.c 8.4 (Berkeley) 4/15/94"; +#endif +#endif + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#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, char *thread, 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) { + if (thread != NULL) { + asprintf(&ap, "%s/%s", cmd, thread); + sprintf(cp, "[%.*s]", (int)maxlen, ap); + free(ap); + } else + 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); +} |