# 2.11BSD#431 - /usr/src/usr.bin/patch/util.c

##### Functions

    ask               X
    copy_file         X
    fatal             X
    fetchname         X
    ignore_signals    X
    makedirs          X
    move_file         X
    savestr           X
    say               X
    set_signals       X

       1: #include "EXTERN.h"
       2: #include "common.h"
       3: #include "INTERN.h"
       4: #include "util.h"
       5:
       6: /* Rename a file, copying it if necessary. */
       7:
       8: int
       9: move_file(from,to)
      10: char *from, *to;
      11: {
      12:     char bakname[512];
      13:     Reg1 char *s;
      14:     Reg2 int i;
      15:     Reg3 int fromfd;
      16:
      17:     /* to stdout? */
      18:
      19:     if (strEQ(to, "-")) {
      20: #ifdef DEBUGGING
      21:     if (debug & 4)
      22:         say2("Moving %s to stdout.\n", from);
      23: #endif
      24:     fromfd = open(from, 0);
      25:     if (fromfd < 0)
      26:         fatal2("patch: internal error, can't reopen %s\n", from);
      27:     while ((i=read(fromfd, buf, sizeof buf)) > 0)
      28:         if (write(1, buf, i) != 1)
      29:         fatal1("patch: write failed\n");
      30:     Close(fromfd);
      31:     return 0;
      32:     }
      33:
      34:     if (origprae) {
      35:         Strcpy (bakname, origprae);
      36:         Strcat(bakname, to);
      37:     } else {
      38:         Strcpy(bakname, to);
      39:         Strcat(bakname, origext?origext:ORIGEXT);
      40:     }
      41:     if (stat(to, &filestat) >= 0) { /* output file exists */
      42:     dev_t to_device = filestat.st_dev;
      43:     ino_t to_inode  = filestat.st_ino;
      44:     char *simplename = bakname;
      45:
      46:     for (s=bakname; *s; s++) {
      47:         if (*s == '/')
      48:         simplename = s+1;
      49:     }
      50:     /* find a backup name that is not the same file */
      51:     while (stat(bakname, &filestat) >= 0 &&
      52:         to_device == filestat.st_dev && to_inode == filestat.st_ino) {
      53:         for (s=simplename; *s && !islower(*s); s++) ;
      54:         if (*s)
      55:         *s = toupper(*s);
      56:         else
      57:         Strcpy(simplename, simplename+1);
      58:     }
      59:     while (unlink(bakname) >= 0) ;  /* while() is for benefit of Eunice */
      60: #ifdef DEBUGGING
      61:     if (debug & 4)
      62:         say3("Moving %s to %s.\n", to, bakname);
      63: #endif
      64:     if (link(to, bakname) < 0) {
      65:         say3("patch: can't backup %s, output is in %s\n",
      66:         to, from);
      67:         return -1;
      68:     }
      69:     while (unlink(to) >= 0) ;
      70:     }
      71: #ifdef DEBUGGING
      72:     if (debug & 4)
      73:     say3("Moving %s to %s.\n", from, to);
      74: #endif
      75:     if (link(from, to) < 0) {       /* different file system? */
      76:     Reg4 int tofd;
      77:
      78:     tofd = creat(to, 0666);
      79:     if (tofd < 0) {
      80:         say3("patch: can't create %s, output is in %s.\n",
      81:           to, from);
      82:         return -1;
      83:     }
      84:     fromfd = open(from, 0);
      85:     if (fromfd < 0)
      86:         fatal2("patch: internal error, can't reopen %s\n", from);
      87:     while ((i=read(fromfd, buf, sizeof buf)) > 0)
      88:         if (write(tofd, buf, i) != i)
      89:         fatal1("patch: write failed\n");
      90:     Close(fromfd);
      91:     Close(tofd);
      92:     }
      93:     Unlink(from);
      94:     return 0;
      95: }
      96:
      97: /* Copy a file. */
      98:
      99: void
     100: copy_file(from,to)
     101: char *from, *to;
     102: {
     103:     Reg3 int tofd;
     104:     Reg2 int fromfd;
     105:     Reg1 int i;
     106:
     107:     tofd = creat(to, 0666);
     108:     if (tofd < 0)
     109:     fatal2("patch: can't create %s.\n", to);
     110:     fromfd = open(from, 0);
     111:     if (fromfd < 0)
     112:     fatal2("patch: internal error, can't reopen %s\n", from);
     113:     while ((i=read(fromfd, buf, sizeof buf)) > 0)
     114:     if (write(tofd, buf, i) != i)
     115:         fatal2("patch: write (%s) failed\n", to);
     116:     Close(fromfd);
     117:     Close(tofd);
     118: }
     119:
     120: /* Allocate a unique area for a string. */
     121:
     122: char *
     123: savestr(s)
     124: Reg1 char *s;
     125: {
     126:     Reg3 char *rv;
     127:     Reg2 char *t;
     128:
     129:     if (!s)
     130:     s = "Oops";
     131:     t = s;
     132:     while (*t++);
     133:     rv = malloc((MEM) (t - s));
     134:     if (rv == Nullch) {
     135:     if (using_plan_a)
     136:         out_of_mem = TRUE;
     137:     else
     138:         fatal1("patch: out of memory (savestr)\n");
     139:     }
     140:     else {
     141:     t = rv;
     142:     while (*t++ = *s++);
     143:     }
     144:     return rv;
     145: }
     146:
     147: #if defined(lint) && defined(CANVARARG)
     148:
     149: /*VARARGS ARGSUSED*/
     150: say(pat) char *pat; { ; }
     151: /*VARARGS ARGSUSED*/
     152: fatal(pat) char *pat; { ; }
     153: /*VARARGS ARGSUSED*/
     154: ask(pat) char *pat; { ; }
     155:
     156: #else
     157:
     158: /* Vanilla terminal output (buffered). */
     159:
     160: void
     161: say(pat,arg1,arg2,arg3)
     162: char *pat;
     163: long arg1,arg2,arg3;
     164: {
     165:     fprintf(stderr, pat, arg1, arg2, arg3);
     166:     Fflush(stderr);
     167: }
     168:
     169: /* Terminal output, pun intended. */
     170:
     171: void                /* very void */
     172: fatal(pat,arg1,arg2,arg3)
     173: char *pat;
     174: long arg1,arg2,arg3;
     175: {
     176: #ifdef VOIDSIG
     177:     void my_exit();
     178: #else
     179:     int my_exit();
     180: #endif
     181:
     182:     say(pat, arg1, arg2, arg3);
     183:     my_exit(1);
     184: }
     185:
     186: /* Get a response from the user, somehow or other. */
     187:
     188: void
     189: ask(pat,arg1,arg2,arg3)
     190: char *pat;
     191: long arg1,arg2,arg3;
     192: {
     193:     int ttyfd;
     194:     int r;
     195:     bool tty2 = isatty(2);
     196:
     197:     Sprintf(buf, pat, arg1, arg2, arg3);
     198:     Fflush(stderr);
     199:     write(2, buf, strlen(buf));
     200:     if (tty2) {             /* might be redirected to a file */
     201:     r = read(2, buf, sizeof buf);
     202:     }
     203:     else if (isatty(1)) {       /* this may be new file output */
     204:     Fflush(stdout);
     205:     write(1, buf, strlen(buf));
     206:     r = read(1, buf, sizeof buf);
     207:     }
     208:     else if ((ttyfd = open("/dev/tty", 2)) >= 0 && isatty(ttyfd)) {
     209:                     /* might be deleted or unwriteable */
     210:     write(ttyfd, buf, strlen(buf));
     211:     r = read(ttyfd, buf, sizeof buf);
     212:     Close(ttyfd);
     213:     }
     214:     else if (isatty(0)) {       /* this is probably patch input */
     215:     Fflush(stdin);
     216:     write(0, buf, strlen(buf));
     217:     r = read(0, buf, sizeof buf);
     218:     }
     219:     else {              /* no terminal at all--default it */
     220:     buf[0] = '\n';
     221:     r = 1;
     222:     }
     223:     if (r <= 0)
     224:     buf[0] = 0;
     225:     else
     226:     buf[r] = '\0';
     227:     if (!tty2)
     228:     say1(buf);
     229: }
     230: #endif /* lint */
     231:
     232: /* How to handle certain events when not in a critical region. */
     233:
     234: void
     235: set_signals(reset)
     236: int reset;
     237: {
     238: #ifndef lint
     239: #ifdef VOIDSIG
     240:     void my_exit();
     241:     static void (*hupval)(),(*intval)();
     242: #else
     243:     int my_exit();
     244:     static int (*hupval)(),(*intval)();
     245: #endif
     246:
     247:     if (!reset) {
     248:     hupval = signal(SIGHUP, SIG_IGN);
     249:     if (hupval != SIG_IGN)
     250: #ifdef VOIDSIG
     251:         hupval = my_exit;
     252: #else
     253:         hupval = (int(*)())my_exit;
     254: #endif
     255:     intval = signal(SIGINT, SIG_IGN);
     256:     if (intval != SIG_IGN)
     257: #ifdef VOIDSIG
     258:         intval = my_exit;
     259: #else
     260:         intval = (int(*)())my_exit;
     261: #endif
     262:     }
     263:     Signal(SIGHUP, hupval);
     264:     Signal(SIGINT, intval);
     265: #endif
     266: }
     267:
     268: /* How to handle certain events when in a critical region. */
     269:
     270: void
     271: ignore_signals()
     272: {
     273: #ifndef lint
     274:     Signal(SIGHUP, SIG_IGN);
     275:     Signal(SIGINT, SIG_IGN);
     276: #endif
     277: }
     278:
     279: /* Make sure we'll have the directories to create a file. */
     280:
     281: void
     282: makedirs(filename,striplast)
     283: Reg1 char *filename;
     284: bool striplast;
     285: {
     286:     char tmpbuf[256];
     287:     Reg2 char *s = tmpbuf;
     288:     char *dirv[20];
     289:     Reg3 int i;
     290:     Reg4 int dirvp = 0;
     291:
     292:     while (*filename) {
     293:     if (*filename == '/') {
     294:         filename++;
     295:         dirv[dirvp++] = s;
     296:         *s++ = '\0';
     297:     }
     298:     else {
     299:         *s++ = *filename++;
     300:     }
     301:     }
     302:     *s = '\0';
     303:     dirv[dirvp] = s;
     304:     if (striplast)
     305:     dirvp--;
     306:     if (dirvp < 0)
     307:     return;
     308:     strcpy(buf, "mkdir");
     309:     s = buf;
     310:     for (i=0; i<=dirvp; i++) {
     311:     while (*s) s++;
     312:     *s++ = ' ';
     313:     strcpy(s, tmpbuf);
     314:     *dirv[i] = '/';
     315:     }
     316:     system(buf);
     317: }
     318:
     319: /* Make filenames more reasonable. */
     320:
     321: char *
     322: fetchname(at,strip_leading,assume_exists)
     323: char *at;
     324: int strip_leading;
     325: int assume_exists;
     326: {
     327:     char *s;
     328:     char *name;
     329:     Reg1 char *t;
     330:     char tmpbuf[200];
     331:
     332:     if (!at)
     333:     return Nullch;
     334:     s = savestr(at);
     335:     for (t=s; isspace(*t); t++) ;
     336:     name = t;
     337: #ifdef DEBUGGING
     338:     if (debug & 128)
     339:     say4("fetchname %s %d %d\n",name,strip_leading,assume_exists);
     340: #endif
     341:     if (strnEQ(name, "/dev/null", 9))   /* so files can be created by diffing */
     342:     return Nullch;          /*   against /dev/null. */
     343:     for (; *t && !isspace(*t); t++)
     344:     if (*t == '/')
     345:         if (--strip_leading >= 0)
     346:         name = t+1;
     347:     *t = '\0';
     348:     if (name != s && *s != '/') {
     349:     name[-1] = '\0';
     350:     if (stat(s, &filestat) && filestat.st_mode & S_IFDIR) {
     351:         name[-1] = '/';
     352:         name=s;
     353:     }
     354:     }
     355:     name = savestr(name);
     356:     Sprintf(tmpbuf, "RCS/%s", name);
     357:     free(s);
     358:     if (stat(name, &filestat) < 0 && !assume_exists) {
     359:     Strcat(tmpbuf, RCSSUFFIX);
     360:     if (stat(tmpbuf, &filestat) < 0 && stat(tmpbuf+4, &filestat) < 0) {
     361:         Sprintf(tmpbuf, "SCCS/%s%s", SCCSPREFIX, name);
     362:         if (stat(tmpbuf, &filestat) < 0 && stat(tmpbuf+5, &filestat) < 0) {
     363:         free(name);
     364:         name = Nullch;
     365:         }
     366:     }
     367:     }
     368:     return name;
     369: }

#### Defined functions

ask defined in line 188; used 9 times

- in /usr/src/usr.bin/patch/util.h line 34-37(4), 49-52(4), 70

copy_file defined in line 99; used 2 times

- in /usr/src/usr.bin/patch/pch.c line 1074
- in /usr/src/usr.bin/patch/util.h line 67

fatal defined in line 171; used 9 times

- in /usr/src/usr.bin/patch/util.h line 38-41(4), 53-56(4), 69

fetchname defined in line 321; used 9 times

- in /usr/src/usr.bin/patch/pch.c line 183, 192, 317-321(3), 342-347(3)
- in /usr/src/usr.bin/patch/util.h line 65

ignore_signals defined in line 270; used 3 times

- in /usr/src/usr.bin/patch/patch.c line 277
- in /usr/src/usr.bin/patch/pch.c line 1115
- in /usr/src/usr.bin/patch/util.h line 73

makedirs defined in line 281; used 2 times

- in /usr/src/usr.bin/patch/inp.c line 91
- in /usr/src/usr.bin/patch/util.h line 74

move_file defined in line 8; used 4 times

- in /usr/src/usr.bin/patch/patch.c line 279, 315
- in /usr/src/usr.bin/patch/pch.c line 1116
- in /usr/src/usr.bin/patch/util.h line 66

savestr defined in line 122; used 33 times

- in line 334, 355
- in /usr/src/usr.bin/patch/patch.c line 153, 383-392(3), 439
- in /usr/src/usr.bin/patch/pch.c line 175, 182, 265-272(4), 324-333(5), 340, 350-357(4), 497, 562, 611, 623, 645, 764, 778, 796, 810
- in /usr/src/usr.bin/patch/util.h line 71

say defined in line 160; used 10 times

- in line 182
- in /usr/src/usr.bin/patch/util.h line 30-33(4), 45-48(4), 68

set_signals defined in line 234; used 4 times

- in /usr/src/usr.bin/patch/patch.c line 144, 318
- in /usr/src/usr.bin/patch/pch.c line 1122
- in /usr/src/usr.bin/patch/util.h line 72

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