diff options
author | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 12:33:43 +0000 |
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committer | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 12:33:43 +0000 |
commit | f9ab90d9d6d02989a075d0f0074496d5b1045e4b (patch) | |
tree | add7e996bac5289cdc55e6935750c352505560a9 /usr.bin/join | |
parent | be22b15ae2ff8d7fe06b6e14fddf0c5b444a95da (diff) | |
download | FreeBSD-src-f9ab90d9d6d02989a075d0f0074496d5b1045e4b.zip FreeBSD-src-f9ab90d9d6d02989a075d0f0074496d5b1045e4b.tar.gz |
BSD 4.4 Lite Usr.bin Sources
Diffstat (limited to 'usr.bin/join')
-rw-r--r-- | usr.bin/join/Makefile | 5 | ||||
-rw-r--r-- | usr.bin/join/join.1 | 206 | ||||
-rw-r--r-- | usr.bin/join/join.c | 582 |
3 files changed, 793 insertions, 0 deletions
diff --git a/usr.bin/join/Makefile b/usr.bin/join/Makefile new file mode 100644 index 0000000..3fa8629 --- /dev/null +++ b/usr.bin/join/Makefile @@ -0,0 +1,5 @@ +# @(#)Makefile 8.1 (Berkeley) 6/6/93 + +PROG= join + +.include <bsd.prog.mk> diff --git a/usr.bin/join/join.1 b/usr.bin/join/join.1 new file mode 100644 index 0000000..fa383c6 --- /dev/null +++ b/usr.bin/join/join.1 @@ -0,0 +1,206 @@ +.\" Copyright (c) 1990, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" This code is derived from software contributed to Berkeley by +.\" the Institute of Electrical and Electronics Engineers, Inc. +.\" +.\" 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. +.\" +.\" @(#)join.1 8.1 (Berkeley) 6/6/93 +.\" +.Dd June 6, 1993 +.Dt JOIN 1 +.Os +.Sh NAME +.Nm join +.Nd relational database operator +.Sh SYNOPSIS +.Nm join +.Oo +.Fl a Ar file_number | Fl v Ar file_number +.Oc +.Op Fl e Ar string +.Op Fl j Ar file_number field +.Op Fl o Ar list +.Bk -words +.Ek +.Op Fl t Ar char +.Op Fl \&1 Ar field +.Op Fl \&2 Ar field +.Ar file1 +.Ar file2 +.Sh DESCRIPTION +The join utility performs an ``equality join'' on the specified files +and writes the result to the standard output. +The ``join field'' is the field in each file by which the files are compared. +The first field in each line is used by default. +There is one line in the output for each pair of lines in +.Ar file1 +and +.Ar file2 +which have identical join fields. +Each output line consists of the join field, the remaining fields from +.Ar file1 +and then the remaining fields from +.Ar file2 . +.Pp +The default field separators are tab and space characters. +In this case, multiple tabs and spaces count as a single field separator, +and leading tabs and spaces are ignored. +The default output field separator is a single space character. +.Pp +Many of the options use file and field numbers. +Both file numbers and field numbers are 1 based, i.e. the first file on +the command line is file number 1 and the first field is field number 1. +The following options are available: +.Bl -tag -width Fl +.It Fl a Ar file_number +In addition to the default output, produce a line for each unpairable +line in file +.Ar file_number . +.It Fl e Ar string +Replace empty output fields with +.Ar string . +.It Fl o Ar list +The +.Fl o +option specifies the fields that will be output from each file for +each line with matching join fields. +Each element of +.Ar list +has the form +.Ql file_number.field , +where +.Ar file_number +is a file number and +.Ar field +is a field number. +The elements of list must be either comma (``,'') or whitespace separated. +(The latter requires quoting to protect it from the shell, or, a simpler +approach is to use multiple +.Fl o +options.) +.It Fl t Ar char +Use character +.Ar char +as a field delimiter for both input and output. +Every occurrence of +.Ar char +in a line is significant. +.It Fl v Ar file_number +Do not display the default output, but display a line for each unpairable +line in file +.Ar file_number . +The options +.Fl v Ar 1 +and +.Fl v Ar 2 +may be specified at the same time. +.It Fl 1 Ar field +Join on the +.Ar field Ns 'th +field of file 1. +.It Fl 2 Ar field +Join on the +.Ar field Ns 'th +field of file 2. +.El +.Pp +When the default field delimiter characters are used, the files to be joined +should be ordered in the collating sequence of +.Xr sort 1 , +using the +.Fl b +option, on the fields on which they are to be joined, otherwise +.Nm join +may not report all field matches. +When the field delimiter characters are specified by the +.Fl t +option, the collating sequence should be the same as +.Xr sort +without the +.Fl b +option. +.Pp +If one of the arguments +.Ar file1 +or +.Ar file2 +is ``-'', the standard input is used. +.Pp +The +.Nm join +utility exits 0 on success, and >0 if an error occurs. +.Sh COMPATIBILITY +For compatibility with historic versions of +.Nm join , +the following options are available: +.Bl -tag -width Fl +.It Fl a +In addition to the default output, produce a line for each unpairable line +in both file 1 and file 2. +.It Fl j1 Ar field +Join on the +.Ar field Ns 'th +field of file 1. +.It Fl j2 Ar field +Join on the +.Ar field Ns 'th +field of file 2. +.It Fl j Ar field +Join on the +.Ar field Ns 'th +field of both file 1 and file 2. +.It Fl o Ar list ... +Historical implementations of +.Nm join +permitted multiple arguments to the +.Fl o +option. +These arguments were of the form ``file_number.field_number'' as described +for the current +.Fl o +option. +This has obvious difficulties in the presence of files named ``1.2''. +.El +.Pp +These options are available only so historic shellscripts don't require +modification and should not be used. +.Sh STANDARDS +The +.Nm join +command is expected to be +.St -p1003.2 +compatible. +.Sh SEE ALSO +.Xr awk 1 , +.Xr comm 1 , +.Xr paste 1 , +.Xr sort 1 , +.Xr uniq 1 diff --git a/usr.bin/join/join.c b/usr.bin/join/join.c new file mode 100644 index 0000000..587fa84 --- /dev/null +++ b/usr.bin/join/join.c @@ -0,0 +1,582 @@ +/*- + * Copyright (c) 1991, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Steve Hayman of the Computer Science Department, Indiana University, + * Michiro Hikida and David Goodenough. + * + * 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[] = +"@(#) Copyright (c) 1991, 1993, 1994\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)join.c 8.3 (Berkeley) 4/16/94"; +#endif /* not lint */ + +#include <sys/param.h> + +#include <ctype.h> +#include <err.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +/* + * There's a structure per input file which encapsulates the state of the + * file. We repeatedly read lines from each file until we've read in all + * the consecutive lines from the file with a common join field. Then we + * compare the set of lines with an equivalent set from the other file. + */ +typedef struct { + char *line; /* line */ + u_long linealloc; /* line allocated count */ + char **fields; /* line field(s) */ + u_long fieldcnt; /* line field(s) count */ + u_long fieldalloc; /* line field(s) allocated count */ +} LINE; + +typedef struct { + FILE *fp; /* file descriptor */ + u_long joinf; /* join field (-1, -2, -j) */ + int unpair; /* output unpairable lines (-a) */ + int number; /* 1 for file 1, 2 for file 2 */ + + LINE *set; /* set of lines with same field */ + int pushbool; /* if pushback is set */ + u_long pushback; /* line on the stack */ + u_long setcnt; /* set count */ + u_long setalloc; /* set allocated count */ +} INPUT; +INPUT input1 = { NULL, 0, 0, 1, NULL, 0, 0, 0, }, + input2 = { NULL, 0, 0, 2, NULL, 0, 0, 0, }; + +typedef struct { + u_long filenum; /* file number */ + u_long fieldno; /* field number */ +} OLIST; +OLIST *olist; /* output field list */ +u_long olistcnt; /* output field list count */ +u_long olistalloc; /* output field allocated count */ + +int joinout = 1; /* show lines with matched join fields (-v) */ +int needsep; /* need separator character */ +int spans = 1; /* span multiple delimiters (-t) */ +char *empty; /* empty field replacement string (-e) */ +char *tabchar = " \t"; /* delimiter characters (-t) */ + +int cmp __P((LINE *, u_long, LINE *, u_long)); +void fieldarg __P((char *)); +void joinlines __P((INPUT *, INPUT *)); +void obsolete __P((char **)); +void outfield __P((LINE *, u_long, int)); +void outoneline __P((INPUT *, LINE *)); +void outtwoline __P((INPUT *, LINE *, INPUT *, LINE *)); +void slurp __P((INPUT *)); +void usage __P((void)); + +int +main(argc, argv) + int argc; + char *argv[]; +{ + INPUT *F1, *F2; + int aflag, ch, cval, vflag; + char *end; + + F1 = &input1; + F2 = &input2; + + aflag = vflag = 0; + obsolete(argv); + while ((ch = getopt(argc, argv, "\01a:e:j:1:2:o:t:v:")) != EOF) { + switch (ch) { + case '\01': /* See comment in obsolete(). */ + aflag = 1; + F1->unpair = F2->unpair = 1; + break; + case '1': + if ((F1->joinf = strtol(optarg, &end, 10)) < 1) + errx(1, "-1 option field number less than 1"); + if (*end) + errx(1, "illegal field number -- %s", optarg); + --F1->joinf; + break; + case '2': + if ((F2->joinf = strtol(optarg, &end, 10)) < 1) + errx(1, "-2 option field number less than 1"); + if (*end) + errx(1, "illegal field number -- %s", optarg); + --F2->joinf; + break; + case 'a': + aflag = 1; + switch(strtol(optarg, &end, 10)) { + case 1: + F1->unpair = 1; + break; + case 2: + F2->unpair = 1; + break; + default: + errx(1, "-a option file number not 1 or 2"); + break; + } + if (*end) + errx(1, "illegal file number -- %s", optarg); + break; + case 'e': + empty = optarg; + break; + case 'j': + if ((F1->joinf = F2->joinf = + strtol(optarg, &end, 10)) < 1) + errx(1, "-j option field number less than 1"); + if (*end) + errx(1, "illegal field number -- %s", optarg); + --F1->joinf; + --F2->joinf; + break; + case 'o': + fieldarg(optarg); + break; + case 't': + spans = 0; + if (strlen(tabchar = optarg) != 1) + errx(1, "illegal tab character specification"); + break; + case 'v': + vflag = 1; + joinout = 0; + switch (strtol(optarg, &end, 10)) { + case 1: + F1->unpair = 1; + break; + case 2: + F2->unpair = 1; + break; + default: + errx(1, "-v option file number not 1 or 2"); + break; + } + if (*end) + errx(1, "illegal file number -- %s", optarg); + break; + case '?': + default: + usage(); + } + } + argc -= optind; + argv += optind; + + if (aflag && vflag) + errx(1, "the -a and -v options are mutually exclusive"); + + if (argc != 2) + usage(); + + /* Open the files; "-" means stdin. */ + if (!strcmp(*argv, "-")) + F1->fp = stdin; + else if ((F1->fp = fopen(*argv, "r")) == NULL) + err(1, "%s", *argv); + ++argv; + if (!strcmp(*argv, "-")) + F2->fp = stdin; + else if ((F2->fp = fopen(*argv, "r")) == NULL) + err(1, "%s", *argv); + if (F1->fp == stdin && F2->fp == stdin) + errx(1, "only one input file may be stdin"); + + slurp(F1); + slurp(F2); + while (F1->setcnt && F2->setcnt) { + cval = cmp(F1->set, F1->joinf, F2->set, F2->joinf); + if (cval == 0) { + /* Oh joy, oh rapture, oh beauty divine! */ + if (joinout) + joinlines(F1, F2); + slurp(F1); + slurp(F2); + } else if (cval < 0) { + /* File 1 takes the lead... */ + if (F1->unpair) + joinlines(F1, NULL); + slurp(F1); + } else { + /* File 2 takes the lead... */ + if (F2->unpair) + joinlines(F2, NULL); + slurp(F2); + } + } + + /* + * Now that one of the files is used up, optionally output any + * remaining lines from the other file. + */ + if (F1->unpair) + while (F1->setcnt) { + joinlines(F1, NULL); + slurp(F1); + } + if (F2->unpair) + while (F2->setcnt) { + joinlines(F2, NULL); + slurp(F2); + } + exit(0); +} + +void +slurp(F) + INPUT *F; +{ + LINE *lp, *lastlp, tmp; + size_t len; + int cnt; + char *bp, *fieldp; + + /* + * Read all of the lines from an input file that have the same + * join field. + */ + F->setcnt = 0; + for (lastlp = NULL;; ++F->setcnt, lastlp = lp) { + /* + * If we're out of space to hold line structures, allocate + * more. Initialize the structure so that we know that this + * is new space. + */ + if (F->setcnt == F->setalloc) { + cnt = F->setalloc; + F->setalloc += 50; + if ((F->set = realloc(F->set, + F->setalloc * sizeof(LINE))) == NULL) + err(1, NULL); + memset(F->set + cnt, 0, 50 * sizeof(LINE)); + } + + /* + * Get any pushed back line, else get the next line. Allocate + * space as necessary. If taking the line from the stack swap + * the two structures so that we don't lose space allocated to + * either structure. This could be avoided by doing another + * level of indirection, but it's probably okay as is. + * but it's probably okay as is. + */ + lp = &F->set[F->setcnt]; + if (F->pushbool) { + tmp = F->set[F->setcnt]; + F->set[F->setcnt] = F->set[F->pushback]; + F->set[F->pushback] = tmp; + F->pushbool = 0; + continue; + } + if ((bp = fgetln(F->fp, &len)) == NULL) + return; + if (lp->linealloc <= len + 1) { + lp->linealloc += MAX(100, len + 1); + if ((lp->line = + realloc(lp->line, lp->linealloc)) == NULL) + err(1, NULL); + } + memmove(lp->line, bp, len); + + /* Replace trailing newline, if it exists. */ + if (bp[len - 1] == '\n') + lp->line[len - 1] = '\0'; + else + lp->line[len] = '\0'; + bp = lp->line; + + /* Split the line into fields, allocate space as necessary. */ + lp->fieldcnt = 0; + while ((fieldp = strsep(&bp, tabchar)) != NULL) { + if (spans && *fieldp == '\0') + continue; + if (lp->fieldcnt == lp->fieldalloc) { + lp->fieldalloc += 50; + if ((lp->fields = realloc(lp->fields, + lp->fieldalloc * sizeof(char *))) == NULL) + err(1, NULL); + } + lp->fields[lp->fieldcnt++] = fieldp; + } + + /* See if the join field value has changed. */ + if (lastlp != NULL && cmp(lp, F->joinf, lastlp, F->joinf)) { + F->pushbool = 1; + F->pushback = F->setcnt; + break; + } + } +} + +int +cmp(lp1, fieldno1, lp2, fieldno2) + LINE *lp1, *lp2; + u_long fieldno1, fieldno2; +{ + if (lp1->fieldcnt < fieldno1) + return (lp2->fieldcnt < fieldno2 ? 0 : 1); + if (lp2->fieldcnt < fieldno2) + return (-1); + return (strcmp(lp1->fields[fieldno1], lp2->fields[fieldno2])); +} + +void +joinlines(F1, F2) + INPUT *F1, *F2; +{ + int cnt1, cnt2; + + /* + * Output the results of a join comparison. The output may be from + * either file 1 or file 2 (in which case the first argument is the + * file from which to output) or from both. + */ + if (F2 == NULL) { + for (cnt1 = 0; cnt1 < F1->setcnt; ++cnt1) + outoneline(F1, &F1->set[cnt1]); + return; + } + for (cnt1 = 0; cnt1 < F1->setcnt; ++cnt1) + for (cnt2 = 0; cnt2 < F2->setcnt; ++cnt2) + outtwoline(F1, &F1->set[cnt1], F2, &F2->set[cnt2]); +} + +void +outoneline(F, lp) + INPUT *F; + LINE *lp; +{ + int cnt; + + /* + * Output a single line from one of the files, according to the + * join rules. This happens when we are writing unmatched single + * lines. Output empty fields in the right places. + */ + if (olist) + for (cnt = 0; cnt < olistcnt; ++cnt) { + if (olist[cnt].filenum == F->number) + outfield(lp, olist[cnt].fieldno, 0); + else + outfield(lp, 0, 1); + } + else + for (cnt = 0; cnt < lp->fieldcnt; ++cnt) + outfield(lp, cnt, 0); + (void)printf("\n"); + if (ferror(stdout)) + err(1, "stdout"); + needsep = 0; +} + +void +outtwoline(F1, lp1, F2, lp2) + INPUT *F1, *F2; + LINE *lp1, *lp2; +{ + int cnt; + + /* Output a pair of lines according to the join list (if any). */ + if (olist) + for (cnt = 0; cnt < olistcnt; ++cnt) + if (olist[cnt].filenum == 1) + outfield(lp1, olist[cnt].fieldno, 0); + else /* if (olist[cnt].filenum == 2) */ + outfield(lp2, olist[cnt].fieldno, 0); + else { + /* + * Output the join field, then the remaining fields from F1 + * and F2. + */ + outfield(lp1, F1->joinf, 0); + for (cnt = 0; cnt < lp1->fieldcnt; ++cnt) + if (F1->joinf != cnt) + outfield(lp1, cnt, 0); + for (cnt = 0; cnt < lp2->fieldcnt; ++cnt) + if (F2->joinf != cnt) + outfield(lp2, cnt, 0); + } + (void)printf("\n"); + if (ferror(stdout)) + err(1, "stdout"); + needsep = 0; +} + +void +outfield(lp, fieldno, out_empty) + LINE *lp; + u_long fieldno; + int out_empty; +{ + if (needsep++) + (void)printf("%c", *tabchar); + if (!ferror(stdout)) + if (lp->fieldcnt < fieldno || out_empty) { + if (empty != NULL) + (void)printf("%s", empty); + } else { + if (*lp->fields[fieldno] == '\0') + return; + (void)printf("%s", lp->fields[fieldno]); + } + if (ferror(stdout)) + err(1, "stdout"); +} + +/* + * Convert an output list argument "2.1, 1.3, 2.4" into an array of output + * fields. + */ +void +fieldarg(option) + char *option; +{ + u_long fieldno; + char *end, *token; + + while ((token = strsep(&option, " \t")) != NULL) { + if (*token == '\0') + continue; + if (token[0] != '1' && token[0] != '2' || token[1] != '.') + errx(1, "malformed -o option field"); + fieldno = strtol(token + 2, &end, 10); + if (*end) + errx(1, "malformed -o option field"); + if (fieldno == 0) + errx(1, "field numbers are 1 based"); + if (olistcnt == olistalloc) { + olistalloc += 50; + if ((olist = realloc(olist, + olistalloc * sizeof(OLIST))) == NULL) + err(1, NULL); + } + olist[olistcnt].filenum = token[0] - '0'; + olist[olistcnt].fieldno = fieldno - 1; + ++olistcnt; + } +} + +void +obsolete(argv) + char **argv; +{ + int len; + char **p, *ap, *t; + + while ((ap = *++argv) != NULL) { + /* Return if "--". */ + if (ap[0] == '-' && ap[1] == '-') + return; + switch (ap[1]) { + case 'a': + /* + * The original join allowed "-a", which meant the + * same as -a1 plus -a2. POSIX 1003.2, Draft 11.2 + * only specifies this as "-a 1" and "a -2", so we + * have to use another option flag, one that is + * unlikely to ever be used or accidentally entered + * on the command line. (Well, we could reallocate + * the argv array, but that hardly seems worthwhile.) + */ + if (ap[2] == '\0') + ap[1] = '\01'; + break; + case 'j': + /* + * The original join allowed "-j[12] arg" and "-j arg". + * Convert the former to "-[12] arg". Don't convert + * the latter since getopt(3) can handle it. + */ + switch(ap[2]) { + case '1': + if (ap[3] != '\0') + goto jbad; + ap[1] = '1'; + ap[2] = '\0'; + break; + case '2': + if (ap[3] != '\0') + goto jbad; + ap[1] = '2'; + ap[2] = '\0'; + break; + case '\0': + break; + default: +jbad: errx(1, "illegal option -- %s", ap); + usage(); + } + break; + case 'o': + /* + * The original join allowed "-o arg arg". + * Convert to "-o arg -o arg". + */ + if (ap[2] != '\0') + break; + for (p = argv + 2; *p; ++p) { + if (p[0][0] != '1' && + p[0][0] != '2' || p[0][1] != '.') + break; + len = strlen(*p); + if (len - 2 != strspn(*p + 2, "0123456789")) + break; + if ((t = malloc(len + 3)) == NULL) + err(1, NULL); + t[0] = '-'; + t[1] = 'o'; + memmove(t + 2, *p, len + 1); + *p = t; + } + argv = p - 1; + break; + } + } +} + +void +usage() +{ + (void)fprintf(stderr, "%s%s\n", + "usage: join [-a fileno | -v fileno ] [-e string] [-1 field] ", + "[-2 field]\n [-o list] [-t char] file1 file2"); + exit(1); +} |