chmod: Add SIGINFO handler
PR: 191884 Submitted by: Dan McGregor <dan.mcgregor at usask.ca> Reviewed by: mjg@ (earlier version)
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@ -32,7 +32,7 @@
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.\" @(#)chmod.1 8.4 (Berkeley) 3/31/94
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.\" $FreeBSD$
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.\"
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.Dd April 20, 2015
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.Dd January 7, 2017
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.Dt CHMOD 1
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.Os
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.Sh NAME
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@ -106,6 +106,16 @@ option is specified.
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In addition, these options override each other and the
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command's actions are determined by the last one specified.
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.Pp
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If
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.Nm
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receives a
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.Dv SIGINFO
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signal (see the
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.Cm status
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argument for
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.Xr stty 1 ) ,
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then the current filename as well as the old and new modes are displayed.
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.Pp
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Only the owner of a file or the super-user is permitted to change
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the mode of a file.
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.Sh EXIT STATUS
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@ -49,14 +49,24 @@ __FBSDID("$FreeBSD$");
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#include <fcntl.h>
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#include <fts.h>
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#include <limits.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static volatile sig_atomic_t siginfo;
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static void usage(void);
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static int may_have_nfs4acl(const FTSENT *ent, int hflag);
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static void
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siginfo_handler(int sig __unused)
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{
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siginfo = 1;
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}
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int
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main(int argc, char *argv[])
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{
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@ -125,6 +135,8 @@ done: argv += optind;
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if (argc < 2)
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usage();
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(void)signal(SIGINFO, siginfo_handler);
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if (Rflag) {
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if (hflag)
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errx(1, "the -R and -h options may not be "
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@ -192,10 +204,10 @@ done: argv += optind;
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&& !fflag) {
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warn("%s", p->fts_path);
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rval = 1;
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} else if (vflag) {
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} else if (vflag || siginfo) {
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(void)printf("%s", p->fts_path);
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if (vflag > 1) {
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if (vflag > 1 || siginfo) {
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char m1[12], m2[12];
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strmode(p->fts_statp->st_mode, m1);
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@ -207,6 +219,7 @@ done: argv += optind;
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newmode, m2);
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}
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(void)printf("\n");
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siginfo = 0;
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}
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}
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if (errno)
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