gno/usr.bin/sort/initdisksort.c

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1996-01-28 00:52:48 +00:00
#ifdef __CCFRONT__
#include <14:pragma.h>
#endif
#define DSORT
#include "common.h"
#include <stdlib.h>
#include <unistd.h>
#define OPENMODE "w+" /* the mode for create/read/write */
static char *errstring1="initdisksort: couldn't get temp name";
static char *errstring2="initdisksort: couldn't open temp file";
/*
* int initdisksort(void);
*
* Pre: None.
*
* Post: Returns 0 on success, -1 on failure.
* On success:
* file1 through file4 are initialized as temp file names.
* fp1 through fp4 are open file pointers for file1 ... file4.
*
* Uses Globals:
* fp1, fp2, fp3, fp4
* file1, file2, file3, file4,
* v_flag
*/
int initdisksort(void) {
/*
* Get the names for the temp files -- this is ponderous but necessary
*/
if ((file1 = tempnam(tpath1,"dsort")) == NULL) {
if (v_flag) perror(errstring1);
return -1;
}
if ((file2 = tempnam(tpath2,"dsort")) == NULL) {
if (v_flag) perror(errstring1);
free(file1);
return -1;
}
if ((file3 = tempnam(tpath3,"dsort")) == NULL) {
if (v_flag) perror(errstring1);
free(file1);
free(file2);
return -1;
}
if ((file4 = tempnam(tpath4,"dsort")) == NULL) {
if (v_flag) perror(errstring1);
free(file1);
free(file2);
free(file3);
return -1;
}
/*
* Open the temp files -- again ponderous but necessary
*/
if ((fp1 = fopen(file1,OPENMODE))==NULL) {
if (v_flag) perror(errstring2);
free(file1);
free(file2);
free(file3);
free(file4);
return -1;
}
if ((fp2 = fopen(file2,OPENMODE))==NULL) {
if (v_flag) perror(errstring2);
unlink(file1);
free(file1);
free(file2);
free(file3);
free(file4);
return -1;
}
if ((fp3 = fopen(file3,OPENMODE))==NULL) {
if (v_flag) perror(errstring2);
unlink(file1);
unlink(file2);
free(file1);
free(file2);
free(file3);
free(file4);
return -1;
}
if ((fp4 = fopen(file4,OPENMODE))==NULL) {
if (v_flag) perror(errstring2);
unlink(file1);
unlink(file2);
unlink(file3);
free(file1);
free(file2);
free(file3);
free(file4);
return -1;
}
return 0;
}