Use err(3) instead of local redefinition.
This commit is contained in:
Philippe Charnier
parent
3fa69daee8
commit
a51024e289
@ -52,7 +52,7 @@
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.Op Ar utility Op Ar arguments ...
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.Sh DESCRIPTION
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The
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.Nm xargs
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.Nm
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utility reads space, tab, newline and end-of-file delimited arguments
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from the standard input and executes the specified
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.Ar utility
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@ -82,7 +82,7 @@ The options are as follows:
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.Bl -tag -width indent
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.It Fl 0
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Changes
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.Nm xargs
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.Nm
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to expect NUL
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(``\\0'')
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characters as seperators, instead of spaces and newlines.
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@ -126,7 +126,7 @@ Echo the command to be executed to standard error immediately before it
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is executed.
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.It Fl x
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Force
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.Nm xargs
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.Nm
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to terminate immediately if a command line containing
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.Ar number
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arguments will not fit in the specified (or default) command line length.
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@ -143,7 +143,7 @@ Undefined behavior may occur if
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reads from the standard input.
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.Pp
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The
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.Nm xargs
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.Nm
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utility exits immediately (without processing any further input) if a
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command line cannot be assembled,
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.Ar utility
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@ -151,22 +151,22 @@ cannot be invoked, an invocation of the utility is terminated by a signal
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or an invocation of the utility exits with a value of 255.
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.Pp
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The
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.Nm xargs
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.Nm
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utility exits with a value of 0 if no error occurs.
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If
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.Ar utility
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cannot be invoked,
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.Nm xargs
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.Nm
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exits with a value of 127.
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If any other error occurs,
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.Nm xargs
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.Nm
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exits with a value of 1.
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.Sh SEE ALSO
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.Xr echo 1 ,
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.Xr find 1
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.Sh STANDARDS
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The
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.Nm xargs
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.Nm
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utility is expected to be
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.St -p1003.2
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compliant.
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@ -35,32 +35,36 @@
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*/
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#ifndef lint
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static char copyright[] =
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static const char copyright[] =
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"@(#) Copyright (c) 1990, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)xargs.c 8.1 (Berkeley) 6/6/93";
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#endif
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static const char rcsid[] =
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"$Id$";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <err.h>
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#include <limits.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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#include <limits.h>
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#include "pathnames.h"
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int tflag, rval;
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int zflag;
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void err __P((const char *, ...));
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void run __P((char **));
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void usage __P((void));
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static void usage __P((void));
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int
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main(argc, argv, env)
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int argc;
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char **argv, **env;
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@ -95,7 +99,7 @@ main(argc, argv, env)
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case 'n':
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nflag = 1;
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if ((nargs = atoi(optarg)) <= 0)
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err("illegal argument count");
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errx(1, "illegal argument count");
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break;
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case 's':
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nline = atoi(optarg);
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@ -126,7 +130,7 @@ main(argc, argv, env)
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*/
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if (!(av = bxp =
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malloc((u_int)(1 + argc + nargs + 1) * sizeof(char **))))
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err("%s", strerror(errno));
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errx(1, "malloc");
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/*
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* Use the user's name for the utility as argv[0], just like the
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@ -159,10 +163,10 @@ main(argc, argv, env)
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*/
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nline -= cnt;
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if (nline <= 0)
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err("insufficient space for command");
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errx(1, "insufficient space for command");
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if (!(bbp = malloc((u_int)nline + 1)))
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err("%s", strerror(errno));
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errx(1, "malloc");
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ebp = (argp = p = bbp) + nline - 1;
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for (insingle = indouble = 0;;)
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@ -199,7 +203,7 @@ main(argc, argv, env)
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/* Quotes do not escape newlines. */
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arg1: if (insingle || indouble)
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err("unterminated quote");
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errx(1, "unterminated quote");
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arg2: *p = '\0';
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*xp++ = argp;
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@ -211,7 +215,7 @@ arg2: *p = '\0';
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*/
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if (xp == exp || p == ebp || ch == EOF) {
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if (xflag && xp != exp && p == ebp)
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err("insufficient space for arguments");
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errx(1, "insufficient space for arguments");
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*xp = NULL;
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run(av);
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if (ch == EOF)
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@ -237,7 +241,7 @@ arg2: *p = '\0';
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goto addch;
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/* Backslash escapes anything, is escaped by quotes. */
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if (!insingle && !indouble && (ch = getchar()) == EOF)
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err("backslash at EOF");
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errx(1, "backslash at EOF");
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/* FALLTHROUGH */
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default:
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addch: if (p < ebp) {
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@ -247,10 +251,10 @@ addch: if (p < ebp) {
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/* If only one argument, not enough buffer space. */
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if (bxp == xp)
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err("insufficient space for argument");
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errx(1, "insufficient space for argument");
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/* Didn't hit argument limit, so if xflag object. */
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if (xflag)
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err("insufficient space for arguments");
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errx(1, "insufficient space for arguments");
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*xp = NULL;
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run(av);
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@ -283,17 +287,16 @@ run(argv)
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noinvoke = 0;
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switch(pid = vfork()) {
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case -1:
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err("vfork: %s", strerror(errno));
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err(1, "vfork");
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case 0:
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execvp(argv[0], argv);
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(void)fprintf(stderr,
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"xargs: %s: %s\n", argv[0], strerror(errno));
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warn("%s", argv[0]);
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noinvoke = 1;
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_exit(1);
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}
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pid = waitpid(pid, &status, 0);
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if (pid == -1)
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err("waitpid: %s", strerror(errno));
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err(1, "waitpid");
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/* If we couldn't invoke the utility, exit 127. */
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if (noinvoke)
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exit(127);
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@ -304,39 +307,10 @@ run(argv)
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rval = 1;
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}
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void
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static void
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usage()
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{
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(void)fprintf(stderr,
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"usage: xargs [-0] [-t] [-n number [-x]] [-s size] [utility [argument ...]]\n");
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exit(1);
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}
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#if __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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void
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#if __STDC__
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err(const char *fmt, ...)
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#else
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err(fmt, va_alist)
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char *fmt;
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va_dcl
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#endif
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{
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va_list ap;
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#if __STDC__
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va_start(ap, fmt);
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#else
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va_start(ap);
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#endif
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(void)fprintf(stderr, "xargs: ");
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(void)vfprintf(stderr, fmt, ap);
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va_end(ap);
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(void)fprintf(stderr, "\n");
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exit(1);
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/* NOTREACHED */
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}
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