1 /* $OpenBSD: lam.c,v 1.14 2009/10/27 23:59:39 deraadt Exp $ */ 2 /* $NetBSD: lam.c,v 1.2 1994/11/14 20:27:42 jtc Exp $ */ 3 4 /*- 5 * Copyright (c) 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * lam - laminate files 35 * Author: John Kunze, UCB 36 */ 37 38 #include <sys/param.h> 39 40 #include <ctype.h> 41 #include <err.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 #define BIGBUFSIZ 5 * BUFSIZ 47 48 struct openfile { /* open file structure */ 49 FILE *fp; /* file pointer */ 50 short eof; /* eof flag */ 51 short pad; /* pad flag for missing columns */ 52 char eol; /* end of line character */ 53 char *sepstring; /* string to print before each line */ 54 char *format; /* printf(3) style string spec. */ 55 } input[NOFILE_MAX + 1]; /* last one is for the last -s arg. */ 56 #define INPUTSIZE sizeof(input) / sizeof(*input) 57 58 int numfiles; /* number of open files */ 59 int nofinalnl; /* normally append \n to each output line */ 60 char line[BIGBUFSIZ]; 61 char *linep; 62 63 void usage(void); 64 char *gatherline(struct openfile *); 65 void getargs(int, char *[]); 66 char *pad(struct openfile *); 67 68 int 69 main(int argc, char *argv[]) 70 { 71 int i; 72 73 /* Process arguments, set numfiles to file argument count. */ 74 getargs(argc, argv); 75 if (numfiles == 0) 76 usage(); 77 /* Concatenate lines from each file, then print. */ 78 for (;;) { 79 linep = line; 80 /* 81 * For each file that has a line to print, numfile is 82 * incremented. Thus if numfiles is 0, we are done. 83 */ 84 numfiles = 0; 85 for (i = 0; i < INPUTSIZE - 1 && input[i].fp != NULL; i++) 86 linep = gatherline(&input[i]); 87 if (numfiles == 0) 88 exit(0); 89 fputs(line, stdout); 90 /* Print terminating -s argument. */ 91 fputs(input[i].sepstring, stdout); 92 if (!nofinalnl) 93 putchar('\n'); 94 } 95 } 96 97 void 98 getargs(int argc, char *argv[]) 99 { 100 struct openfile *ip = input; 101 char *p; 102 int ch, P, S, F, T; 103 size_t siz; 104 105 P = S = F = T = 0; /* capitalized options */ 106 while (optind < argc) { 107 switch (ch = getopt(argc, argv, "F:f:P:p:S:s:T:t:")) { 108 case 'F': case 'f': 109 F = (ch == 'F'); 110 /* Validate format string argument. */ 111 for (p = optarg; *p != '\0'; p++) 112 if (!isdigit(*p) && *p != '.' && *p != '-') 113 errx(1, "%s: invalid width specified", 114 optarg); 115 /* '%' + width + 's' + '\0' */ 116 siz = p - optarg + 3; 117 if ((p = realloc(ip->format, siz)) == NULL) 118 err(1, NULL); 119 snprintf(p, siz, "%%%ss", optarg); 120 ip->format = p; 121 break; 122 case 'P': case 'p': 123 P = (ch == 'P'); 124 ip->pad = 1; 125 break; 126 case 'S': case 's': 127 S = (ch == 'S'); 128 ip->sepstring = optarg; 129 break; 130 case 'T': case 't': 131 T = (ch == 'T'); 132 if (strlen(optarg) != 1) 133 usage(); 134 ip->eol = optarg[0]; 135 nofinalnl = 1; 136 break; 137 case -1: 138 if (optind >= argc) 139 break; /* to support "--" */ 140 /* This is a file, not a flag. */ 141 ++numfiles; 142 if (numfiles >= INPUTSIZE) 143 errx(1, "too many files"); 144 if (strcmp(argv[optind], "-") == 0) 145 ip->fp = stdin; 146 else if ((ip->fp = fopen(argv[optind], "r")) == NULL) 147 err(1, "%s", argv[optind]); 148 ip->pad = P; 149 if (ip->sepstring == NULL) 150 ip->sepstring = S ? (ip-1)->sepstring : ""; 151 if (ip->format == NULL) 152 ip->format = (P || F) ? (ip-1)->format : "%s"; 153 if (ip->eol == '\0') 154 ip->eol = T ? (ip-1)->eol : '\n'; 155 ip++; 156 optind++; 157 break; 158 default: 159 usage(); 160 /* NOTREACHED */ 161 } 162 } 163 ip->fp = NULL; 164 if (ip->sepstring == NULL) 165 ip->sepstring = ""; 166 } 167 168 char * 169 pad(struct openfile *ip) 170 { 171 size_t n; 172 char *lp = linep; 173 174 n = strlcpy(lp, ip->sepstring, line + sizeof(line) - lp); 175 lp += (n < line + sizeof(line) - lp) ? n : strlen(lp); 176 if (ip->pad) { 177 n = snprintf(lp, line + sizeof(line) - lp, ip->format, ""); 178 if (n > 0) 179 lp += (n < line + sizeof(line) - lp) ? n : strlen(lp); 180 } 181 return (lp); 182 } 183 184 /* 185 * Grab line from file, appending to linep. Increments numfiles if file 186 * is still open. 187 */ 188 char * 189 gatherline(struct openfile *ip) 190 { 191 size_t n; 192 char s[BUFSIZ]; 193 char *p; 194 char *lp = linep; 195 char *end = s + BUFSIZ - 1; 196 int c; 197 198 if (ip->eof) 199 return (pad(ip)); 200 for (p = s; (c = fgetc(ip->fp)) != EOF && p < end; p++) 201 if ((*p = c) == ip->eol) 202 break; 203 *p = '\0'; 204 if (c == EOF) { 205 ip->eof = 1; 206 if (ip->fp == stdin) 207 fclose(stdin); 208 return (pad(ip)); 209 } 210 /* Something will be printed. */ 211 numfiles++; 212 n = strlcpy(lp, ip->sepstring, line + sizeof(line) - lp); 213 lp += (n < line + sizeof(line) - lp) ? n : strlen(lp); 214 n = snprintf(lp, line + sizeof(line) - lp, ip->format, s); 215 if (n > 0) 216 lp += (n < line + sizeof(line) - lp) ? n : strlen(lp); 217 return (lp); 218 } 219 220 void 221 usage(void) 222 { 223 extern char *__progname; 224 225 fprintf(stderr, 226 "usage: %s [-f min.max] [-p min.max] [-s sepstring] [-t c] file ...\n", 227 __progname); 228 exit(1); 229 } 230