/* $OpenBSD: lam.c,v 1.17 2015/01/16 06:40:09 deraadt Exp $ */ /* $NetBSD: lam.c,v 1.2 1994/11/14 20:27:42 jtc Exp $ */ /*- * Copyright (c) 1993 * The Regents of the University of California. All rights reserved. * * 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. 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. */ /* * lam - laminate files * Author: John Kunze, UCB */ #include /* NOFILE_MAX */ #include #include #include #include #include #include #define BIGBUFSIZ 5 * BUFSIZ struct openfile { /* open file structure */ FILE *fp; /* file pointer */ short eof; /* eof flag */ short pad; /* pad flag for missing columns */ char eol; /* end of line character */ char *sepstring; /* string to print before each line */ char *format; /* printf(3) style string spec. */ } input[NOFILE_MAX + 1]; /* last one is for the last -s arg. */ #define INPUTSIZE sizeof(input) / sizeof(*input) int numfiles; /* number of open files */ int nofinalnl; /* normally append \n to each output line */ char line[BIGBUFSIZ]; char *linep; void usage(void); char *gatherline(struct openfile *); void getargs(int, char *[]); char *pad(struct openfile *); int main(int argc, char *argv[]) { int i; /* Process arguments, set numfiles to file argument count. */ getargs(argc, argv); if (numfiles == 0) usage(); /* Concatenate lines from each file, then print. */ for (;;) { linep = line; /* * For each file that has a line to print, numfile is * incremented. Thus if numfiles is 0, we are done. */ numfiles = 0; for (i = 0; i < INPUTSIZE - 1 && input[i].fp != NULL; i++) linep = gatherline(&input[i]); if (numfiles == 0) exit(0); fputs(line, stdout); /* Print terminating -s argument. */ fputs(input[i].sepstring, stdout); if (!nofinalnl) putchar('\n'); } } void getargs(int argc, char *argv[]) { struct openfile *ip = input; char *p; int ch, P, S, F, T; size_t siz; P = S = F = T = 0; /* capitalized options */ while (optind < argc) { switch (ch = getopt(argc, argv, "+F:f:P:p:S:s:T:t:")) { case 'F': case 'f': F = (ch == 'F'); /* Validate format string argument. */ for (p = optarg; *p != '\0'; p++) if (!isdigit((unsigned char)*p) && *p != '.' && *p != '-') errx(1, "%s: invalid width specified", optarg); /* '%' + width + 's' + '\0' */ siz = p - optarg + 3; if ((p = realloc(ip->format, siz)) == NULL) err(1, NULL); snprintf(p, siz, "%%%ss", optarg); ip->format = p; break; case 'P': case 'p': P = (ch == 'P'); ip->pad = 1; break; case 'S': case 's': S = (ch == 'S'); ip->sepstring = optarg; break; case 'T': case 't': T = (ch == 'T'); if (strlen(optarg) != 1) usage(); ip->eol = optarg[0]; nofinalnl = 1; break; case -1: if (optind >= argc) break; /* to support "--" */ /* This is a file, not a flag. */ ++numfiles; if (numfiles >= INPUTSIZE) errx(1, "too many files"); if (strcmp(argv[optind], "-") == 0) ip->fp = stdin; else if ((ip->fp = fopen(argv[optind], "r")) == NULL) err(1, "%s", argv[optind]); ip->pad = P; if (ip->sepstring == NULL) ip->sepstring = S ? (ip-1)->sepstring : ""; if (ip->format == NULL) ip->format = (P || F) ? (ip-1)->format : "%s"; if (ip->eol == '\0') ip->eol = T ? (ip-1)->eol : '\n'; ip++; optind++; break; default: usage(); /* NOTREACHED */ } } ip->fp = NULL; if (ip->sepstring == NULL) ip->sepstring = ""; } char * pad(struct openfile *ip) { size_t n; char *lp = linep; n = strlcpy(lp, ip->sepstring, line + sizeof(line) - lp); lp += (n < line + sizeof(line) - lp) ? n : strlen(lp); if (ip->pad) { n = snprintf(lp, line + sizeof(line) - lp, ip->format, ""); if (n > 0) lp += (n < line + sizeof(line) - lp) ? n : strlen(lp); } return (lp); } /* * Grab line from file, appending to linep. Increments numfiles if file * is still open. */ char * gatherline(struct openfile *ip) { size_t n; char s[BUFSIZ]; char *p; char *lp = linep; char *end = s + BUFSIZ - 1; int c; if (ip->eof) return (pad(ip)); for (p = s; (c = fgetc(ip->fp)) != EOF && p < end; p++) if ((*p = c) == ip->eol) break; *p = '\0'; if (c == EOF) { ip->eof = 1; if (ip->fp == stdin) fclose(stdin); return (pad(ip)); } /* Something will be printed. */ numfiles++; n = strlcpy(lp, ip->sepstring, line + sizeof(line) - lp); lp += (n < line + sizeof(line) - lp) ? n : strlen(lp); n = snprintf(lp, line + sizeof(line) - lp, ip->format, s); if (n > 0) lp += (n < line + sizeof(line) - lp) ? n : strlen(lp); return (lp); } void usage(void) { extern char *__progname; fprintf(stderr, "usage: %s [-f min.max] [-p min.max] [-s sepstring] [-t c] file ...\n", __progname); exit(1); }