441 lines
9.3 KiB
C
441 lines
9.3 KiB
C
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#include "EXTERN.h"
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#include "common.h"
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#include "INTERN.h"
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#include "util.h"
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#include "backupfile.h"
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void my_exit();
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#ifndef HAVE_STRERROR
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static char *
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private_strerror (errnum)
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int errnum;
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{
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extern char *sys_errlist[];
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extern int sys_nerr;
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if (errnum > 0 && errnum <= sys_nerr)
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return sys_errlist[errnum];
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return "Unknown system error";
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}
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#define strerror private_strerror
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#endif /* !HAVE_STRERROR */
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/* Rename a file, copying it if necessary. */
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int
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move_file(from,to)
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char *from, *to;
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{
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char bakname[512];
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Reg1 char *s;
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Reg2 int i;
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Reg3 int fromfd;
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/* to stdout? */
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if (strEQ(to, "-")) {
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#ifdef DEBUGGING
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if (debug & 4)
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say2("Moving %s to stdout.\n", from);
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#endif
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fromfd = open(from, 0);
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if (fromfd < 0)
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pfatal2("internal error, can't reopen %s", from);
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while ((i=read(fromfd, buf, sizeof buf)) > 0)
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if (write(1, buf, i) != 1)
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pfatal1("write failed");
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Close(fromfd);
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return 0;
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}
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if (origprae) {
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Strcpy(bakname, origprae);
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Strcat(bakname, to);
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} else {
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#ifndef NODIR
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char *backupname = find_backup_file_name(to);
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if (backupname == (char *) 0)
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fatal1("out of memory\n");
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Strcpy(bakname, backupname);
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free(backupname);
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#else /* NODIR */
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Strcpy(bakname, to);
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Strcat(bakname, simple_backup_suffix);
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#endif /* NODIR */
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}
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if (stat(to, &filestat) == 0) { /* output file exists */
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dev_t to_device = filestat.st_dev;
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ino_t to_inode = filestat.st_ino;
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char *simplename = bakname;
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for (s=bakname; *s; s++) {
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if (*s == '/')
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simplename = s+1;
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}
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/* Find a backup name that is not the same file.
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Change the first lowercase char into uppercase;
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if that isn't sufficient, chop off the first char and try again. */
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while (stat(bakname, &filestat) == 0 &&
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to_device == filestat.st_dev && to_inode == filestat.st_ino) {
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/* Skip initial non-lowercase chars. */
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for (s=simplename; *s && !islower((unsigned char)*s); s++) ;
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if (*s)
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*s = toupper((unsigned char)*s);
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else
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Strcpy(simplename, simplename+1);
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}
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while (unlink(bakname) >= 0) ; /* while() is for benefit of Eunice */
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#ifdef DEBUGGING
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if (debug & 4)
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say3("Moving %s to %s.\n", to, bakname);
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#endif
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if (rename(to, bakname) < 0) {
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say4("Can't backup %s, output is in %s: %s\n", to, from,
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strerror(errno));
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return -1;
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}
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while (unlink(to) >= 0) ;
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}
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#ifdef DEBUGGING
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if (debug & 4)
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say3("Moving %s to %s.\n", from, to);
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#endif
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if (rename(from, to) < 0) { /* different file system? */
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Reg4 int tofd;
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tofd = creat(to, 0666);
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if (tofd < 0) {
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say4("Can't create %s, output is in %s: %s\n",
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to, from, strerror(errno));
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return -1;
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}
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fromfd = open(from, 0);
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if (fromfd < 0)
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pfatal2("internal error, can't reopen %s", from);
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while ((i=read(fromfd, buf, sizeof buf)) > 0)
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if (write(tofd, buf, i) != i)
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pfatal1("write failed");
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Close(fromfd);
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Close(tofd);
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}
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Unlink(from);
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return 0;
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}
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/* Copy a file. */
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void
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copy_file(from,to)
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char *from, *to;
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{
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Reg3 int tofd;
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Reg2 int fromfd;
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Reg1 int i;
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tofd = creat(to, 0666);
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if (tofd < 0)
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pfatal2("can't create %s", to);
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fromfd = open(from, 0);
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if (fromfd < 0)
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pfatal2("internal error, can't reopen %s", from);
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while ((i=read(fromfd, buf, sizeof buf)) > 0)
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if (write(tofd, buf, i) != i)
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pfatal2("write to %s failed", to);
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Close(fromfd);
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Close(tofd);
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}
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/* Allocate a unique area for a string. */
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char *
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savestr(s)
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Reg1 char *s;
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{
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Reg3 char *rv;
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Reg2 char *t;
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if (!s)
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s = "Oops";
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t = s;
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while (*t++);
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rv = malloc((MEM) (t - s));
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if (rv == Nullch) {
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if (using_plan_a)
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out_of_mem = TRUE;
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else
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fatal1("out of memory\n");
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}
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else {
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t = rv;
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while ((*t++ = *s++));
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}
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return rv;
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}
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#if defined(lint) && defined(CANVARARG)
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/*VARARGS ARGSUSED*/
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say(pat) char *pat; { ; }
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/*VARARGS ARGSUSED*/
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fatal(pat) char *pat; { ; }
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/*VARARGS ARGSUSED*/
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pfatal(pat) char *pat; { ; }
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/*VARARGS ARGSUSED*/
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ask(pat) char *pat; { ; }
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#else
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/* Vanilla terminal output (buffered). */
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void
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say(pat,arg1,arg2,arg3)
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char *pat;
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long arg1,arg2,arg3;
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{
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fprintf(stderr, pat, arg1, arg2, arg3);
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Fflush(stderr);
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}
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/* Terminal output, pun intended. */
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void /* very void */
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fatal(pat,arg1,arg2,arg3)
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char *pat;
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long arg1,arg2,arg3;
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{
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fprintf(stderr, "patch: **** ");
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fprintf(stderr, pat, arg1, arg2, arg3);
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my_exit(1);
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}
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/* Say something from patch, something from the system, then silence . . . */
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void /* very void */
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pfatal(pat,arg1,arg2,arg3)
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char *pat;
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long arg1,arg2,arg3;
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{
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int errnum = errno;
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fprintf(stderr, "patch: **** ");
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fprintf(stderr, pat, arg1, arg2, arg3);
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fprintf(stderr, ": %s\n", strerror(errnum));
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my_exit(1);
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}
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/* Get a response from the user, somehow or other. */
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int
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ask(pat,arg1,arg2,arg3)
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char *pat;
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long arg1,arg2,arg3;
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{
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int ttyfd;
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int r;
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bool tty2 = isatty(2);
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Sprintf(buf, pat, arg1, arg2, arg3);
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Fflush(stderr);
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write(2, buf, strlen(buf));
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if (tty2) { /* might be redirected to a file */
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r = read(2, buf, sizeof buf);
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}
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else if (isatty(1)) { /* this may be new file output */
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Fflush(stdout);
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write(1, buf, strlen(buf));
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r = read(1, buf, sizeof buf);
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}
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else if ((ttyfd = open("/dev/tty", 2)) >= 0 && isatty(ttyfd)) {
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/* might be deleted or unwriteable */
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write(ttyfd, buf, strlen(buf));
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r = read(ttyfd, buf, sizeof buf);
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Close(ttyfd);
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}
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else if (isatty(0)) { /* this is probably patch input */
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Fflush(stdin);
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write(0, buf, strlen(buf));
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r = read(0, buf, sizeof buf);
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}
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else { /* no terminal at all--default it */
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buf[0] = '\n';
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buf[1] = 0;
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say1(buf);
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return 0; /* signal possible error */
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}
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if (r <= 0)
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buf[0] = 0;
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else
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buf[r] = '\0';
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if (!tty2)
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say1(buf);
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if (r <= 0)
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return 0; /* if there was an error, return it */
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else
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return 1;
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}
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#endif /* lint */
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/* How to handle certain events when not in a critical region. */
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void
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set_signals(reset)
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int reset;
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{
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#ifndef lint
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static RETSIGTYPE (*hupval)(),(*intval)();
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if (!reset) {
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hupval = signal(SIGHUP, SIG_IGN);
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if (hupval != SIG_IGN)
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hupval = (RETSIGTYPE(*)())my_exit;
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intval = signal(SIGINT, SIG_IGN);
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if (intval != SIG_IGN)
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intval = (RETSIGTYPE(*)())my_exit;
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}
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Signal(SIGHUP, hupval);
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Signal(SIGINT, intval);
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#endif
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}
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/* How to handle certain events when in a critical region. */
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void
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ignore_signals()
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{
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#ifndef lint
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Signal(SIGHUP, SIG_IGN);
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Signal(SIGINT, SIG_IGN);
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#endif
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}
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/* Make sure we'll have the directories to create a file.
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If `striplast' is TRUE, ignore the last element of `filename'. */
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void
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makedirs(filename,striplast)
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Reg1 char *filename;
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bool striplast;
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{
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char tmpbuf[256];
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Reg2 char *s = tmpbuf;
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char *dirv[20]; /* Point to the NULs between elements. */
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Reg3 int i;
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Reg4 int dirvp = 0; /* Number of finished entries in dirv. */
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/* Copy `filename' into `tmpbuf' with a NUL instead of a slash
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between the directories. */
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while (*filename) {
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if (*filename == '/') {
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filename++;
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dirv[dirvp++] = s;
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*s++ = '\0';
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}
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else {
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*s++ = *filename++;
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}
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}
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*s = '\0';
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dirv[dirvp] = s;
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if (striplast)
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dirvp--;
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if (dirvp < 0)
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return;
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strcpy(buf, "mkdir");
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s = buf;
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for (i=0; i<=dirvp; i++) {
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struct stat sbuf;
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if (stat(tmpbuf, &sbuf) && errno == ENOENT) {
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while (*s) s++;
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*s++ = ' ';
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strcpy(s, tmpbuf);
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}
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*dirv[i] = '/';
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}
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if (s != buf)
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system(buf);
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}
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/* Make filenames more reasonable. */
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char *
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fetchname(at,strip_leading,assume_exists)
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char *at;
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int strip_leading;
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int assume_exists;
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{
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char *fullname;
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char *name;
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Reg1 char *t;
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char tmpbuf[200];
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int sleading = strip_leading;
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if (!at)
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return Nullch;
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while (isspace((unsigned char)*at))
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at++;
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#ifdef DEBUGGING
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if (debug & 128)
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say4("fetchname %s %d %d\n",at,strip_leading,assume_exists);
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#endif
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if (strnEQ(at, "/dev/null", 9)) /* so files can be created by diffing */
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return Nullch; /* against /dev/null. */
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name = fullname = t = savestr(at);
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/* Strip off up to `sleading' leading slashes and null terminate. */
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for (; *t && !isspace((unsigned char)*t); t++)
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if (*t == '/')
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if (--sleading >= 0)
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name = t+1;
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*t = '\0';
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/* If no -p option was given (957 is the default value!),
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we were given a relative pathname,
|
||
|
|
and the leading directories that we just stripped off all exist,
|
||
|
|
put them back on. */
|
||
|
|
if (strip_leading == 957 && name != fullname && *fullname != '/') {
|
||
|
|
name[-1] = '\0';
|
||
|
|
if (stat(fullname, &filestat) == 0 && S_ISDIR (filestat.st_mode)) {
|
||
|
|
name[-1] = '/';
|
||
|
|
name=fullname;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
name = savestr(name);
|
||
|
|
free(fullname);
|
||
|
|
|
||
|
|
if (stat(name, &filestat) && !assume_exists) {
|
||
|
|
char *filebase = basename(name);
|
||
|
|
int pathlen = filebase - name;
|
||
|
|
|
||
|
|
/* Put any leading path into `tmpbuf'. */
|
||
|
|
strncpy(tmpbuf, name, pathlen);
|
||
|
|
|
||
|
|
#define try(f, a1, a2) (Sprintf(tmpbuf + pathlen, f, a1, a2), stat(tmpbuf, &filestat) == 0)
|
||
|
|
if ( try("RCS/%s%s", filebase, RCSSUFFIX)
|
||
|
|
|| try("RCS/%s%s", filebase, "")
|
||
|
|
|| try( "%s%s", filebase, RCSSUFFIX)
|
||
|
|
|| try("SCCS/%s%s", SCCSPREFIX, filebase)
|
||
|
|
|| try( "%s%s", SCCSPREFIX, filebase))
|
||
|
|
return name;
|
||
|
|
free(name);
|
||
|
|
name = Nullch;
|
||
|
|
}
|
||
|
|
|
||
|
|
return name;
|
||
|
|
}
|
||
|
|
|
||
|
|
char *
|
||
|
|
xmalloc (size)
|
||
|
|
unsigned size;
|
||
|
|
{
|
||
|
|
register char *p = (char *) malloc (size);
|
||
|
|
if (!p)
|
||
|
|
fatal("out of memory");
|
||
|
|
return p;
|
||
|
|
}
|