1 /* $NetBSD: lam.c,v 1.8 2011/09/04 20:28:09 joerg Exp $ */ 2 3 /*- 4 * Copyright (c) 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)lam.c 8.1 (Berkeley) 6/6/93"; 41 #endif 42 __RCSID("$NetBSD: lam.c,v 1.8 2011/09/04 20:28:09 joerg Exp $"); 43 #endif /* not lint */ 44 45 /* 46 * lam - laminate files 47 * Author: John Kunze, UCB 48 */ 49 50 #include <ctype.h> 51 #include <err.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 56 #define MAXOFILES 20 57 #define BIGBUFSIZ 5 * BUFSIZ 58 59 struct openfile { /* open file structure */ 60 FILE *fp; /* file pointer */ 61 short eof; /* eof flag */ 62 short pad; /* pad flag for missing columns */ 63 char eol; /* end of line character */ 64 const char *sepstring; /* string to print before each line */ 65 const char *format; /* printf(3) style string spec. */ 66 } input[MAXOFILES]; 67 68 static int morefiles; /* set by getargs(), changed by gatherline() */ 69 static int nofinalnl; /* normally append \n to each output line */ 70 static char line[BIGBUFSIZ]; 71 static char *linep; 72 73 __dead static void error(const char *, const char *); 74 static char *gatherline(struct openfile *); 75 static void getargs(char *[]); 76 static char *pad(struct openfile *); 77 78 int 79 main(int argc, char *argv[]) 80 { 81 struct openfile *ip; 82 83 getargs(argv); 84 if (!morefiles) 85 error("lam - laminate files", ""); 86 for (;;) { 87 linep = line; 88 for (ip = input; ip->fp != NULL; ip++) 89 linep = gatherline(ip); 90 if (!morefiles) 91 exit(0); 92 fputs(line, stdout); 93 fputs(ip->sepstring, stdout); 94 if (!nofinalnl) 95 putchar('\n'); 96 } 97 } 98 99 static void 100 getargs(char *av[]) 101 { 102 struct openfile *ip = input; 103 char *p, *c; 104 static char fmtbuf[BUFSIZ]; 105 char *fmtp = fmtbuf; 106 int P, S, F, T; 107 108 P = S = F = T = 0; /* capitalized options */ 109 while ((p = *++av) != NULL) { 110 if (*p != '-' || !p[1]) { 111 if (++morefiles >= MAXOFILES) 112 errx(1, "too many input files"); 113 if (*p == '-') 114 ip->fp = stdin; 115 else if ((ip->fp = fopen(p, "r")) == NULL) 116 errx(1, "open %s", p); 117 ip->pad = P; 118 if (!ip->sepstring) 119 ip->sepstring = (S ? (ip-1)->sepstring : ""); 120 if (!ip->format) 121 ip->format = ((P || F) ? (ip-1)->format : "%s"); 122 if (!ip->eol) 123 ip->eol = (T ? (ip-1)->eol : '\n'); 124 ip++; 125 continue; 126 } 127 c = ++p; 128 switch (tolower((unsigned char) *c)) { 129 case 's': 130 if (*++p || (p = *++av)) 131 ip->sepstring = p; 132 else 133 error("Need string after -%s", c); 134 S = (*c == 'S' ? 1 : 0); 135 break; 136 case 't': 137 if (*++p || (p = *++av)) 138 ip->eol = *p; 139 else 140 error("Need character after -%s", c); 141 T = (*c == 'T' ? 1 : 0); 142 nofinalnl = 1; 143 break; 144 case 'p': 145 ip->pad = 1; 146 P = (*c == 'P' ? 1 : 0); 147 /* FALLTHROUGH */ 148 case 'f': 149 F = (*c == 'F' ? 1 : 0); 150 if (*++p || (p = *++av)) { 151 fmtp += strlen(fmtp) + 1; 152 if (fmtp >= fmtbuf + sizeof(fmtbuf)) 153 errx(1, "no more format space"); 154 /* restrict format string to only valid width formatters */ 155 if (strspn(p, "-.0123456789") != strlen(p)) 156 errx(1, "invalid format string `%s'", p); 157 if (snprintf(fmtp, fmtbuf + sizeof(fmtbuf) - fmtp, "%%%ss", p) 158 >= fmtbuf + sizeof(fmtbuf) - fmtp) 159 errx(1, "no more format space"); 160 sprintf(fmtp, "%%%ss", p); 161 ip->format = fmtp; 162 } 163 else 164 error("Need string after -%s", c); 165 break; 166 default: 167 error("What do you mean by -%s?", c); 168 break; 169 } 170 } 171 ip->fp = NULL; 172 if (!ip->sepstring) 173 ip->sepstring = ""; 174 } 175 176 static char * 177 pad(struct openfile *ip) 178 { 179 char *lp = linep; 180 181 strlcpy(lp, ip->sepstring, line + sizeof(line) - lp); 182 lp += strlen(lp); 183 if (ip->pad) { 184 snprintf(lp, line + sizeof(line) - lp, ip->format, ""); 185 lp += strlen(lp); 186 } 187 return (lp); 188 } 189 190 static char * 191 gatherline(struct openfile *ip) 192 { 193 char s[BUFSIZ]; 194 int c; 195 char *p; 196 char *lp = linep; 197 char *end = s + sizeof(s) - 1; 198 199 if (ip->eof) 200 return (pad(ip)); 201 for (p = s; (c = fgetc(ip->fp)) != EOF && p < end; p++) 202 if ((*p = c) == ip->eol) 203 break; 204 *p = '\0'; 205 if (c == EOF) { 206 ip->eof = 1; 207 if (ip->fp == stdin) 208 fclose(stdin); 209 morefiles--; 210 return (pad(ip)); 211 } 212 strlcpy(lp, ip->sepstring, line + sizeof(line) - lp); 213 lp += strlen(lp); 214 snprintf(lp, line + sizeof(line) - lp, ip->format, s); 215 lp += strlen(lp); 216 return (lp); 217 } 218 219 static void 220 error(const char *msg, const char *s) 221 { 222 warnx(msg, s); 223 fprintf(stderr, 224 "\nUsage: lam [ -[fp] min.max ] [ -s sepstring ] [ -t c ] file ...\n"); 225 if (strncmp("lam - ", msg, 6) == 0) 226 fprintf(stderr, "Options:\n\t%s\t%s\t%s\t%s\t%s", 227 "-f min.max field widths for file fragments\n", 228 "-p min.max like -f, but pad missing fragments\n", 229 "-s sepstring fragment separator\n", 230 "-t c input line terminator is c, no \\n after output lines\n", 231 "Capitalized options affect more than one file.\n"); 232 exit(1); 233 } 234
Indexes created Sat Sep 20 22:09:52 GMT 2025