into.c File Reference

#include "rle_config.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <string.h>

Include dependency graph for into.c:

Go to the source code of this file.

Macros
#define	_XOPEN_SOURCE   /* For mkstemp */

Functions
void	main (int argc, char **argv)

Variables
static char	temp [] = "intoXXXXXX"
static char	buf [4096 +1]
short	forceflg

Macro Definition Documentation

#define _XOPEN_SOURCE   /* For mkstemp */

Definition at line 30 of file into.c.

Function Documentation

void main	(	int	argc,
		char **	argv
	)

Definition at line 52 of file into.c.

{
    char *cp;
    int c;
    FILE * outf;
    char iobuf[BUFSIZ];
    int size;

    /* Don't allow files named "-f" in order to catch common error */
    if (argc >= 2 && !strcmp(argv[1], "-f"))
    {
    forceflg++;
    argc--, argv++;
    }
    if (argc != 2)
    {
    fprintf(stderr, "Usage: into [ -f ] file\n");
    exit(1);
    }
    if (!forceflg && access(argv[1], 2) < 0 && errno != ENOENT)
    {
    fprintf(stderr, "into: ");
    perror(argv[1]);
    exit(1);
    }

    if ( (cp = rindex( argv[1], '/' )) != NULL )
    {
    c = *++cp;
    *cp = 0;
    strcpy( buf, argv[1] );
    *cp = c;
    strcat( buf, temp );
    }
    else
    strcpy( buf, temp );

    mkstemp( buf );

    if ( (outf = fopen( buf, "w" )) == NULL )
    {
    perror(buf);
    exit(1);
    }

    while ( (size = fread(iobuf, 1, sizeof iobuf, stdin)) != 0)
    fwrite(iobuf, 1, size, outf);

    if ( !forceflg && ftell(outf) == 0L )
    {
    fprintf( stderr, "into: empty output, \"%s\" not modified\n", argv[1]);
    unlink( buf );
    exit(1);
    }
    fflush(outf);
    if (ferror(outf))
    {
    fprintf(stderr, "into: %s, \"%s\" not modified\n",
        strerror(errno), argv[1]);
    unlink(buf);
    exit(1);
    }
    fclose( outf );

    if ( rename( buf, argv[1] ) < 0 )
    {
    fprintf(stderr, "into: rename(%s, %s): ", buf, argv[1]);
    perror("");
    }
    exit( 0 );
}

Variable Documentation

char buf[ 4096 +1]

static

Definition at line 46 of file into.c.

short forceflg

Definition at line 47 of file into.c.

char temp[] = "intoXXXXXX"

static

Definition at line 45 of file into.c.