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BSD 4_4_Lite1 release
[unix-history] / usr / src / usr.bin / split / split.c
diff --git a/usr/src/usr.bin/split/split.c b/usr/src/usr.bin/split/split.c
index 21ae529..198532b 100644 (file)
--- a/usr/src/usr.bin/split/split.c
+++ b/usr/src/usr.bin/split/split.c
@@ -1,248 +1,288 @@
 /*
 /*
- * Copyright (c) 1987, 1993
+ * Copyright (c) 1987, 1993, 1994
  *     The Regents of the University of California.  All rights reserved.
  *
  *     The Regents of the University of California.  All rights reserved.
  *
- * %sccs.include.redist.c%
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
  */
 
 #ifndef lint
 static char copyright[] =
  */
 
 #ifndef lint
 static char copyright[] =
-"@(#) Copyright (c) 1987, 1993\n\
+"@(#) Copyright (c) 1987, 1993, 1994\n\
        The Regents of the University of California.  All rights reserved.\n";
 #endif /* not lint */
 
 #ifndef lint
        The Regents of the University of California.  All rights reserved.\n";
 #endif /* not lint */
 
 #ifndef lint
-static char sccsid[] = "@(#)split.c    8.1 (Berkeley) %G%";
+static char sccsid[] = "@(#)split.c    8.2 (Berkeley) 4/16/94";
 #endif /* not lint */
 
 #include <sys/param.h>
 #endif /* not lint */
 
 #include <sys/param.h>
-#include <sys/file.h>
-#include <stdio.h>
+
 #include <ctype.h>
 #include <ctype.h>
+#include <err.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define DEFLINE        1000                    /* Default num lines per file. */
 
 
-#define DEFLINE        1000                    /* default num lines per file */
-#define ERR    -1                      /* general error */
-#define NO     0                       /* no/false */
-#define OK     0                       /* okay exit */
-#define YES    1                       /* yes/true */
+long    bytecnt;                       /* Byte count to split on. */
+long    numlines;                      /* Line count to split on. */
+int     file_open;                     /* If a file open. */
+int     ifd = -1, ofd = -1;            /* Input/output file descriptors. */
+char    bfr[MAXBSIZE];                 /* I/O buffer. */
+char    fname[MAXPATHLEN];             /* File name prefix. */
 
 
-static long    bytecnt,                /* byte count to split on */
-               numlines;               /* lines in each file */
-static int     ifd = ERR,              /* input file descriptor */
-               ofd = ERR;              /* output file descriptor */
-static short   file_open;              /* if a file open */
-static char    bfr[MAXBSIZE],          /* I/O buffer */
-               fname[MAXPATHLEN];      /* file name */
+void newfile __P((void));
+void split1 __P((void));
+void split2 __P((void));
+void usage __P((void));
 
 
+int
 main(argc, argv)
        int argc;
 main(argc, argv)
        int argc;
-       char **argv;
+       char *argv[];
 {
 {
-       register int cnt;
-       long atol();
-       char *strcpy();
-
-       for (cnt = 1; cnt < argc; ++cnt) {
-               if (argv[cnt][0] == '-')
-                       switch(argv[cnt][1]) {
-                       case 0:         /* stdin by request */
-                               if (ifd != ERR)
-                                       usage();
-                               ifd = 0;
-                               break;
-                       case 'b':       /* byte count split */
-                               if (numlines)
-                                       usage();
-                               if (!argv[cnt][2])
-                                       bytecnt = atol(argv[++cnt]);
+       int ch;
+       char *ep, *p;
+
+       while ((ch = getopt(argc, argv, "-0123456789b:l:")) != EOF)
+               switch (ch) {
+               case '0': case '1': case '2': case '3': case '4':
+               case '5': case '6': case '7': case '8': case '9':
+                       /*
+                        * Undocumented kludge: split was originally designed
+                        * to take a number after a dash.
+                        */
+                       if (numlines == 0) {
+                               p = argv[optind - 1];
+                               if (p[0] == '-' && p[1] == ch && !p[2])
+                                       numlines = strtol(++p, &ep, 10);
                                else
                                else
-                                       bytecnt = atol(argv[cnt] + 2);
-                               if (bytecnt <= 0) {
-                                       fputs("split: byte count must be greater than zero.\n", stderr);
-                                       usage();
-                               }
-                               break;
-                       default:
-                               if (!isdigit(argv[cnt][1]) || bytecnt)
-                                       usage();
-                               if ((numlines = atol(argv[cnt] + 1)) <= 0) {
-                                       fputs("split: line count must be greater than zero.\n", stderr);
-                                       usage();
-                               }
-                               break;
+                                       numlines =
+                                           strtol(argv[optind] + 1, &ep, 10);
+                               if (numlines <= 0 || *ep)
+                                       errx(1,
+                                           "%s: illegal line count.", optarg);
                        }
                        }
-               else if (ifd == ERR) {          /* input file */
-                       if ((ifd = open(argv[cnt], O_RDONLY, 0)) < 0) {
-                               perror(argv[cnt]);
-                               exit(1);
-                       }
-               }
-               else if (!*fname)               /* output file prefix */
-                       strcpy(fname, argv[cnt]);
-               else
+                       break;
+               case '-':               /* Undocumented: historic stdin flag. */
+                       if (ifd != -1)
+                               usage();
+                       ifd = 0;
+                       break;
+               case 'b':               /* Byte count. */
+                       if ((bytecnt = strtol(optarg, &ep, 10)) <= 0 ||
+                           *ep != '\0' && *ep != 'k' && *ep != 'm')
+                               errx(1, "%s: illegal byte count.", optarg);
+                       if (*ep == 'k')
+                               bytecnt *= 1024;
+                       else if (*ep == 'm')
+                               bytecnt *= 1048576;
+                       break;
+               case 'l':               /* Line count. */
+                       if (numlines != 0)
+                               usage();
+                       if ((numlines = strtol(optarg, &ep, 10)) <= 0 || *p)
+                               errx(1, "%s: illegal line count.", optarg);
+                       break;
+               default:
                        usage();
                        usage();
-       }
-       if (ifd == ERR)                         /* stdin by default */
+               }
+       argv += optind;
+       argc -= optind;
+
+       if (*argv != NULL)
+               if (ifd == -1) {                /* Input file. */
+                       if ((ifd = open(*argv, O_RDONLY, 0)) < 0)
+                               err(1, "%s", *argv);
+                       ++argv;
+               }
+       if (*argv != NULL)                      /* File name prefix. */
+               (void)strcpy(fname, *argv++);
+       if (*argv != NULL)
+               usage();
+
+       if (numlines == 0)
+               numlines = DEFLINE;
+       else if (bytecnt)
+               usage();
+
+       if (ifd == -1)                          /* Stdin by default. */
                ifd = 0;
                ifd = 0;
-       if (bytecnt)
+
+       if (bytecnt) {
                split1();
                split1();
-       if (!numlines)
-               numlines = DEFLINE;
+               exit (0);
+       }
        split2();
        exit(0);
 }
 
 /*
  * split1 --
        split2();
        exit(0);
 }
 
 /*
  * split1 --
- *     split by bytes
+ *     Split the input by bytes.
  */
  */
+void
 split1()
 {
 split1()
 {
-       register long bcnt;
-       register int dist, len;
-       register char *C;
+       long bcnt;
+       int dist, len;
+       char *C;
 
        for (bcnt = 0;;)
 
        for (bcnt = 0;;)
-               switch(len = read(ifd, bfr, MAXBSIZE)) {
+               switch (len = read(ifd, bfr, MAXBSIZE)) {
                case 0:
                case 0:
-                       exit(OK);
-               case ERR:
-                       perror("read");
-                       exit(1);
+                       exit(0);
+               case -1:
+                       err(1, "read");
+                       /* NOTREACHED */
                default:
                        if (!file_open) {
                                newfile();
                default:
                        if (!file_open) {
                                newfile();
-                               file_open = YES;
+                               file_open = 1;
                        }
                        if (bcnt + len >= bytecnt) {
                                dist = bytecnt - bcnt;
                                if (write(ofd, bfr, dist) != dist)
                        }
                        if (bcnt + len >= bytecnt) {
                                dist = bytecnt - bcnt;
                                if (write(ofd, bfr, dist) != dist)
-                                       wrerror();
+                                       err(1, "write");
                                len -= dist;
                                len -= dist;
-                               for (C = bfr + dist; len >= bytecnt; len -= bytecnt, C += bytecnt) {
+                               for (C = bfr + dist; len >= bytecnt;
+                                   len -= bytecnt, C += bytecnt) {
                                        newfile();
                                        newfile();
-                                       if (write(ofd, C, (int)bytecnt) != bytecnt)
-                                               wrerror();
+                                       if (write(ofd,
+                                           C, (int)bytecnt) != bytecnt)
+                                               err(1, "write");
                                }
                                if (len) {
                                        newfile();
                                        if (write(ofd, C, len) != len)
                                }
                                if (len) {
                                        newfile();
                                        if (write(ofd, C, len) != len)
-                                               wrerror();
-                               }
-                               else
-                                       file_open = NO;
+                                               err(1, "write");
+                               } else
+                                       file_open = 0;
                                bcnt = len;
                                bcnt = len;
-                       }
-                       else {
+                       } else {
                                bcnt += len;
                                if (write(ofd, bfr, len) != len)
                                bcnt += len;
                                if (write(ofd, bfr, len) != len)
-                                       wrerror();
+                                       err(1, "write");
                        }
                }
 }
 
 /*
  * split2 --
                        }
                }
 }
 
 /*
  * split2 --
- *     split by lines
+ *     Split the input by lines.
  */
  */
+void
 split2()
 {
 split2()
 {
-       register char *Ce, *Cs;
-       register long lcnt;
-       register int len, bcnt;
+       long lcnt;
+       int len, bcnt;
+       char *Ce, *Cs;
 
        for (lcnt = 0;;)
 
        for (lcnt = 0;;)
-               switch(len = read(ifd, bfr, MAXBSIZE)) {
+               switch (len = read(ifd, bfr, MAXBSIZE)) {
                case 0:
                        exit(0);
                case 0:
                        exit(0);
-               case ERR:
-                       perror("read");
-                       exit(1);
+               case -1:
+                       err(1, "read");
+                       /* NOTREACHED */
                default:
                        if (!file_open) {
                                newfile();
                default:
                        if (!file_open) {
                                newfile();
-                               file_open = YES;
+                               file_open = 1;
                        }
                        for (Cs = Ce = bfr; len--; Ce++)
                                if (*Ce == '\n' && ++lcnt == numlines) {
                                        bcnt = Ce - Cs + 1;
                                        if (write(ofd, Cs, bcnt) != bcnt)
                        }
                        for (Cs = Ce = bfr; len--; Ce++)
                                if (*Ce == '\n' && ++lcnt == numlines) {
                                        bcnt = Ce - Cs + 1;
                                        if (write(ofd, Cs, bcnt) != bcnt)
-                                               wrerror();
+                                               err(1, "write");
                                        lcnt = 0;
                                        Cs = Ce + 1;
                                        if (len)
                                                newfile();
                                        else
                                        lcnt = 0;
                                        Cs = Ce + 1;
                                        if (len)
                                                newfile();
                                        else
-                                               file_open = NO;
+                                               file_open = 0;
                                }
                        if (Cs < Ce) {
                                bcnt = Ce - Cs;
                                if (write(ofd, Cs, bcnt) != bcnt)
                                }
                        if (Cs < Ce) {
                                bcnt = Ce - Cs;
                                if (write(ofd, Cs, bcnt) != bcnt)
-                                       wrerror();
+                                       err(1, "write");
                        }
                }
 }
 
 /*
  * newfile --
                        }
                }
 }
 
 /*
  * newfile --
- *     open a new file
+ *     Open a new output file.
  */
  */
+void
 newfile()
 {
        static long fnum;
 newfile()
 {
        static long fnum;
-       static short defname;
+       static int defname;
        static char *fpnt;
 
        static char *fpnt;
 
-       if (ofd == ERR) {
-               if (fname[0]) {
-                       fpnt = fname + strlen(fname);
-                       defname = NO;
-               }
-               else {
+       if (ofd == -1) {
+               if (fname[0] == '\0') {
                        fname[0] = 'x';
                        fpnt = fname + 1;
                        fname[0] = 'x';
                        fpnt = fname + 1;
-                       defname = YES;
+                       defname = 1;
+               } else {
+                       fpnt = fname + strlen(fname);
+                       defname = 0;
                }
                ofd = fileno(stdout);
        }
        /*
                }
                ofd = fileno(stdout);
        }
        /*
-        * hack to increase max files; original code just wandered through
+        * Hack to increase max files; original code wandered through
         * magic characters.  Maximum files is 3 * 26 * 26 == 2028
         */
 #define MAXFILES       676
        if (fnum == MAXFILES) {
         * magic characters.  Maximum files is 3 * 26 * 26 == 2028
         */
 #define MAXFILES       676
        if (fnum == MAXFILES) {
-               if (!defname || fname[0] == 'z') {
-                       fputs("split: too many files.\n", stderr);
-                       exit(1);
-               }
+               if (!defname || fname[0] == 'z')
+                       errx(1, "too many files.");
                ++fname[0];
                fnum = 0;
        }
        fpnt[0] = fnum / 26 + 'a';
        fpnt[1] = fnum % 26 + 'a';
        ++fnum;
                ++fname[0];
                fnum = 0;
        }
        fpnt[0] = fnum / 26 + 'a';
        fpnt[1] = fnum % 26 + 'a';
        ++fnum;
-       if (!freopen(fname, "w", stdout)) {
-               fprintf(stderr, "split: unable to write to %s.\n", fname);
-               exit(ERR);
-       }
+       if (!freopen(fname, "w", stdout))
+               err(1, "%s", fname);
 }
 
 }
 
-/*
- * usage --
- *     print usage message and die
- */
+void
 usage()
 {
 usage()
 {
-       fputs("usage: split [-] [-#] [-b byte_count] [file [prefix]]\n", stderr);
-       exit(1);
-}
-
-/*
- * wrerror --
- *     write error
- */
-wrerror()
-{
-       perror("split: write");
+       (void)fprintf(stderr,
+"usage: split [-b byte_count] [-l line_count] [file [prefix]]\n");
        exit(1);
 }
        exit(1);
 }
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.