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Sourcecode: safecat version File versions

writefile.c

/* Copyright (c) 2000, Len Budney. See COPYING for details. */
#include "env.h"
#include "stralloc.h"
#include "strerr.h"
#include "subfd.h"
#include "substdio.h"
#include "writefile.h"
#include <errno.h>
#include <unistd.h>

extern stralloc tmppath;

/* ****************************************************************** */
void writefile(int fd) {
  char inbuf[512];
  char outbuf[512];
  char *dtline;
  char *rpline;
  substdio ssin;
  substdio ssout;

  /* Prepare substdio buffers for reading and writing. */
  substdio_fdbuf(&ssin,read,0,inbuf,sizeof(inbuf));
  substdio_fdbuf(&ssout,write,fd,outbuf,sizeof(outbuf));

  /* Print DTLINE and RPLINE, if supplied. */
  dtline = env_get("DTLINE");
  rpline = env_get("RPLINE");
  if (dtline && rpline) {
    if(substdio_puts(&ssout,rpline) == -1) goto fail;
    if(substdio_puts(&ssout,dtline) == -1) goto fail;
  }

  /* Copy stdin to the output file, watching the return values each time. */
  if (substdio_copy(&ssout,&ssin) < 0) goto fail;
  if (substdio_flush(&ssout) == -1) goto fail;

  /* The file is copied. */
  return;

 fail:
  unlink(tmppath.s);
  strerr_die2x(111,"safecat: fatal: ","unable to copy standard input");
}
/* ****************************************************************** */

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