touch.c File Reference

#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <sys/utime.h>
#include <io.h>
#include <fcntl.h>
#include <getopt.h>
#include <various.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

Include dependency graph for touch.c:

Go to the source code of this file.

Macros
#define	DEFFILEMODE   S_IWRITE
#define	ATOI2(ar)   ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;

Functions
int rw	__P ((char *, struct stat *, int))
void stime_arg1	__P ((char *, time_t *))
void stime_arg2	__P ((char *, int, time_t *))
void usage	__P ((void))
int	main (int argc, char *argv[])
void	stime_arg1 (char *arg, time_t *tvp)

Variables
char	copyright []
char *	__progname

Macro Definition Documentation

ATOI2

#define ATOI2

(

ar

)

((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;

Definition at line 197 of file touch.c.

DEFFILEMODE

#define DEFFILEMODE   S_IWRITE

Definition at line 58 of file touch.c.

Function Documentation

__P() [1/4]

int rw __P

(

(char *, struct stat *, int)

)

__P() [2/4]

void stime_file __P

(

(char *, time_t *)

)

__P() [3/4]

void stime_arg2 __P

(

(char *, int, time_t *)

)

__P() [4/4]

void usage __P

(

(void)

)

main()

int main	(	int argc	,
		char *	argv[]
	)

hosttype.c Copyright (C) 2002 by Brian Palmer brian.nosp@m.p@sg.nosp@m.inet..nosp@m.com

Definition at line 78 of file touch.c.

{
    struct stat sb;
    time_t tv[2];
    int aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset;
    char *p;
    struct utimbuf utb;

    __progname = argv[0];

    aflag = cflag = fflag = mflag = timeset = 0;
    time(&tv[0]);

    while ((ch = getopt(argc, argv, "acfmr:t:")) != EOF)
        switch(ch) {
        case 'a':
            aflag = 1;
            break;
        case 'c':
            cflag = 1;
            break;
        case 'f':
            fflag = 1;
            break;
        case 'm':
            mflag = 1;
            break;
        case 'r':
            timeset = 1;
            stime_file(optarg, tv);
            break;
        case 't':
            timeset = 1;
            stime_arg1(optarg, tv);
            break;
        case '?':
        default:
            usage();
        }
    argc -= optind;
    argv += optind;

    /* Default is both -a and -m. */
    if (aflag == 0 && mflag == 0)
        aflag = mflag = 1;

    /*
     * If no -r or -t flag, at least two operands, the first of which
     * is an 8 or 10 digit number, use the obsolete time specification.
     */
    if (!timeset && argc > 1) {
        (void)strtol(argv[0], &p, 10);
        len = p - argv[0];
        if (*p == '\0' && (len == 8 || len == 10)) {
            timeset = 1;
            stime_arg2(argv[0], len == 10, tv);
        }
    }

    /* Otherwise use the current time of day. */
    if (!timeset)
        tv[1] = tv[0];

    if (*argv == NULL)
        usage();

    for (rval = 0; *argv; ++argv) {
        /* See if the file exists. */
        if (stat(*argv, &sb)) {
            if (!cflag) {
                /* Create the file. */
                fd = _open(*argv,
                    O_WRONLY | O_CREAT, DEFFILEMODE);
                if (fd == -1 || fstat(fd, &sb) || _close(fd)) {
                    rval = 1;
                    warn("%s", *argv);
                    continue;
                }

                /* If using the current time, we're done. */
                if (!timeset)
                    continue;
            } else
                continue;
        }

        if (!aflag)
            tv[0] = sb.st_atime;
        if (!mflag)
            tv[1] = sb.st_mtime;

        /* Try utime. */
        utb.actime = tv[0];
        utb.modtime = tv[1];
        if (!utime(*argv, &utb))
            continue;

        /* If the user specified a time, nothing else we can do. */
        if (timeset) {
            rval = 1;
            warn("%s", *argv);
        }

        /*
         * System V and POSIX 1003.1 require that a NULL argument
         * set the access/modification times to the current time.
         * The permission checks are different, too, in that the
         * ability to write the file is sufficient.  Take a shot.
         */
         if (!utime(*argv, NULL))
            continue;

        /* Try reading/writing. */
        if (rw(*argv, &sb, fflag))
            rval = 1;
    }
    return rval;
}

stime_arg1()

void stime_arg1	(	char *	arg,
		time_t *	tvp
	)

Definition at line 200 of file touch.c.

Referenced by main().

Variable Documentation

__progname

char* __progname

Definition at line 68 of file touch.c.

Referenced by main(), verr(), verrx(), vwarn(), and vwarnx().

copyright

char copyright[]

Initial value:

=
"@(#) Copyright (c) 1993 Regents of the University of California.\n\
 All rights reserved.\n"

Definition at line 40 of file touch.c.