1 /*- 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.proprietary.c% 6 */ 7 8 #ifndef lint 9 static char copyright[] = 10 "@(#) Copyright (c) 1983, 1993\n\ 11 The Regents of the University of California. All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)apply.c 8.1 (Berkeley) 06/06/93"; 16 #endif /* not lint */ 17 18 /* 19 * apply - apply a command to a set of arguments 20 * 21 * apply echo * == ls 22 * apply -2 cmp A1 B1 A2 B2 compares A's with B's 23 * apply "ln %1 /usr/fred/dir" * duplicates a directory 24 */ 25 #include <paths.h> 26 #include <stdio.h> 27 28 char *cmdp; 29 #define NCHARS 512 30 char cmd[512]; 31 char defargs=1; 32 #define DEFARGCHAR '%' 33 char argchar=DEFARGCHAR; 34 int nchars; 35 extern char *getenv(); 36 37 main(argc, argv) 38 char *argv[]; 39 { 40 register n; 41 while(argc>2 && argv[1][0]=='-'){ 42 if(argv[1][1]=='a'){ 43 argchar=argv[1][2]; 44 if(argchar=='\0') 45 argchar=DEFARGCHAR; 46 } else { 47 defargs = atoi(&argv[1][1]); 48 if(defargs < 0) 49 defargs = 1; 50 } 51 --argc; ++argv; 52 } 53 if(argc<2){ 54 fprintf(stderr, "usage: apply [-#] [-ac] cmd arglist\n"); 55 exit(1); 56 } 57 argc -= 2; 58 cmdp = argv[1]; 59 argv += 2; 60 while(n=docmd(argc, argv)){ 61 argc -= n; 62 argv += n; 63 } 64 } 65 char 66 addc(c) 67 char c; 68 { 69 if(nchars++>=NCHARS){ 70 fprintf(stderr, "apply: command too long\n"); 71 exit(1); 72 } 73 return(c); 74 } 75 char * 76 addarg(s, t) 77 register char *s, *t; 78 { 79 while(*t = addc(*s++)) 80 *t++; 81 return(t); 82 } 83 docmd(argc, argv) 84 char *argv[]; 85 { 86 register char *p, *q; 87 register max, i; 88 char gotit; 89 if(argc<=0) 90 return(0); 91 nchars = 0; 92 max = 0; 93 gotit = 0; 94 p = cmdp; 95 q = cmd; 96 while(*q = addc(*p++)){ 97 if(*q++!=argchar || *p<'1' || '9'<*p) 98 continue; 99 if((i= *p++-'1') > max) 100 max = i; 101 if(i>=argc){ 102 Toofew: 103 fprintf(stderr, "apply: expecting argument(s) after `%s'\n", argv[argc-1]); 104 exit(1); 105 } 106 q = addarg(argv[i], q-1); 107 gotit++; 108 } 109 if(defargs!=0 && gotit==0){ 110 if(defargs>argc) 111 goto Toofew; 112 for(i=0; i<defargs; i++){ 113 *q++ = addc(' '); 114 q = addarg(argv[i], q); 115 } 116 } 117 i = system(cmd); 118 if(i == 127){ 119 fprintf(stderr, "apply: no shell!\n"); 120 exit(1); 121 } 122 return(max==0? (defargs==0? 1 : defargs) : max+1); 123 } 124 system(s) 125 char *s; 126 { 127 int status, pid, w; 128 char *shell = getenv("SHELL"); 129 130 if ((pid = fork()) == 0) { 131 execl(shell ? shell : _PATH_BSHELL, "sh", "-c", s, 0); 132 _exit(127); 133 } 134 if(pid == -1){ 135 fprintf(stderr, "apply: can't fork\n"); 136 exit(1); 137 } 138 while ((w = wait(&status)) != pid && w != -1) 139 ; 140 if (w == -1) 141 status = -1; 142 return(status); 143 } 144