ANSI

[unix-history] / usr / src / usr.bin / ar / misc.c

/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Hugh Smith at The University of Guelph.
*
* %sccs.include.redist.c%
*/

#ifndef lint
static char sccsid[] = "@(#)misc.c      5.2 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <sys/errno.h>
#include <signal.h>
#include <dirent.h>
#include <unistd.h>
#include <stdio.h>
#include "archive.h"
#include "pathnames.h"

extern CHDR chdr;                       /* converted header */
extern char *archive;                   /* archive name */
char *tname = "temporary file";         /* temporary file "name" */

tmp()
{
       extern char *envtmp;
       sigset_t set, oset;
       static int first;
       int fd;
       char path[MAXPATHLEN];

       if (!first && !envtmp) {
               envtmp = getenv("TMPDIR");
               first = 1;
       }

       if (envtmp)
               (void)sprintf(path, "%s/%s", envtmp, _NAME_ARTMP);
       else
               bcopy(_PATH_ARTMP, path, sizeof(_PATH_ARTMP));
       
       sigemptyset(&set);
       sigaddset(&set, SIGHUP);
       sigaddset(&set, SIGINT);
       sigaddset(&set, SIGQUIT);
       sigaddset(&set, SIGTERM);
       (void)sigprocmask(SIG_BLOCK, &set, &oset);
       if ((fd = mkstemp(path)) == -1)
               error(tname);
       (void)unlink(path);
       (void)sigprocmask(SIG_SETMASK, &oset, (sigset_t *)NULL);
       return(fd);
}

/*
* files --
*      See if the current file matches any file in the argument list; if it
*      does, remove it from the argument list.
*/
files(argv)
       char **argv;
{
       register char **list;

       for (list = argv; *list; ++list)
               if (compare(*list)) {
                       for (; list[0] = list[1]; ++list);
                       return(1);
               }
       return(0);
}

char *
rname(path)
       char *path;
{
       register char *ind;

       return((ind = rindex(path, '/')) ? ind + 1 : path);
}

compare(dest)
       char *dest;
{
       char *rname();

       return(!strcmp(chdr.name, rname(dest)));
}

badfmt()
{
       errno = EFTYPE;
       error(archive);
}

error(name)
       char *name;
{
       (void)fprintf(stderr, "ar: %s: %s\n", name, strerror(errno));
       exit(1);
}