From 5fd83771641d15c418f747bd343ba6738d3875f7 Mon Sep 17 00:00:00 2001 From: Cameron Katri Date: Sun, 9 May 2021 14:20:58 -0400 Subject: Import macOS userland adv_cmds-176 basic_cmds-55 bootstrap_cmds-116.100.1 developer_cmds-66 diskdev_cmds-667.40.1 doc_cmds-53.60.1 file_cmds-321.40.3 mail_cmds-35 misc_cmds-34 network_cmds-606.40.1 patch_cmds-17 remote_cmds-63 shell_cmds-216.60.1 system_cmds-880.60.2 text_cmds-106 --- shell_cmds/which/which.1 | 85 +++++++++++++++++++++++++++ shell_cmds/which/which.c | 146 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 231 insertions(+) create mode 100644 shell_cmds/which/which.1 create mode 100644 shell_cmds/which/which.c (limited to 'shell_cmds/which') diff --git a/shell_cmds/which/which.1 b/shell_cmds/which/which.1 new file mode 100644 index 0000000..d0f2fcb --- /dev/null +++ b/shell_cmds/which/which.1 @@ -0,0 +1,85 @@ +.\" Manpage Copyright (c) 1995, Jordan Hubbard +.\" +.\" 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 FreeBSD Project +.\" its contributors. +.\" 4. Neither the name of the FreeBSD Project 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 CONTRIBUTOR ``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 CONTRIBUTOR 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. +.\" +.\" $FreeBSD: head/usr.bin/which/which.1 267773 2014-06-23 08:23:05Z bapt $ +.\" +.Dd December 13, 2006 +.Dt WHICH 1 +.Os +.Sh NAME +.Nm which +.Nd "locate a program file in the user's path" +.Sh SYNOPSIS +.Nm +.Op Fl as +.Ar program ... +.Sh DESCRIPTION +The +.Nm +utility +takes a list of command names and searches the path for each executable +file that would be run had these commands actually been invoked. +.Pp +The following options are available: +.Bl -tag -width indent +.It Fl a +List all instances of executables found (instead of just the first one +of each). +.It Fl s +No output, just return 0 if all of the executables are found, or 1 if +some were not found. +.El +.Pp +Some shells may provide a builtin +.Nm +command which is similar or identical to this utility. +Consult the +.Xr builtin 1 +manual page. +.Sh SEE ALSO +.Xr builtin 1 , +.Xr csh 1 , +.Xr find 1 , +.Xr locate 1 , +.Xr whereis 1 +.Sh HISTORY +The +.Nm +command first appeared in +.Fx 2.1 . +.Sh AUTHORS +.An -nosplit +The +.Nm +utility was originally written in Perl and was contributed by +.An Wolfram Schneider Aq Mt wosch@FreeBSD.org . +The current version of +.Nm +was rewritten in C by +.An Daniel Papasian Aq Mt dpapasia@andrew.cmu.edu . diff --git a/shell_cmds/which/which.c b/shell_cmds/which/which.c new file mode 100644 index 0000000..7e9d662 --- /dev/null +++ b/shell_cmds/which/which.c @@ -0,0 +1,146 @@ +/** + * Copyright (c) 2000 Dan Papasian. 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. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + */ + +#include + +__FBSDID("$FreeBSD: head/usr.bin/which/which.c 227245 2011-11-06 18:50:26Z ed $"); + +#include +#include + +#include +#include +#include +#include +#include + +static void usage(void); +static int print_matches(char *, char *); + +static int silent; +static int allpaths; + +int +main(int argc, char **argv) +{ + char *p, *path; + ssize_t pathlen; + int opt, status; + + status = EXIT_SUCCESS; + + while ((opt = getopt(argc, argv, "as")) != -1) { + switch (opt) { + case 'a': + allpaths = 1; + break; + case 's': + silent = 1; + break; + default: + usage(); + break; + } + } + + argv += optind; + argc -= optind; + + if (argc == 0) + usage(); + + if ((p = getenv("PATH")) == NULL) + exit(EXIT_FAILURE); + pathlen = strlen(p) + 1; + path = malloc(pathlen); + if (path == NULL) + err(EXIT_FAILURE, NULL); + + while (argc > 0) { + memcpy(path, p, pathlen); + + if (strlen(*argv) >= FILENAME_MAX || + print_matches(path, *argv) == -1) + status = EXIT_FAILURE; + + argv++; + argc--; + } + + exit(status); +} + +static void +usage(void) +{ + + (void)fprintf(stderr, "usage: which [-as] program ...\n"); + exit(EXIT_FAILURE); +} + +static int +is_there(char *candidate) +{ + struct stat fin; + + /* XXX work around access(2) false positives for superuser */ + if (access(candidate, X_OK) == 0 && + stat(candidate, &fin) == 0 && + S_ISREG(fin.st_mode) && + (getuid() != 0 || + (fin.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) != 0)) { + if (!silent) + printf("%s\n", candidate); + return (1); + } + return (0); +} + +static int +print_matches(char *path, char *filename) +{ + char candidate[PATH_MAX]; + const char *d; + int found; + + if (strchr(filename, '/') != NULL) + return (is_there(filename) ? 0 : -1); + found = 0; + while ((d = strsep(&path, ":")) != NULL) { + if (*d == '\0') + d = "."; + if (snprintf(candidate, sizeof(candidate), "%s/%s", d, + filename) >= (int)sizeof(candidate)) + continue; + if (is_there(candidate)) { + found = 1; + if (!allpaths) + break; + } + } + return (found ? 0 : -1); +} + -- cgit v1.2.3-56-ge451