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fcd2465c DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
8 | char copyright[] = | |
9 | "@(#) Copyright (c) 1980 Regents of the University of California.\n\ | |
10 | All rights reserved.\n"; | |
11 | #endif not lint | |
12 | ||
13 | #ifndef lint | |
c6742a65 | 14 | static char sccsid[] = "@(#)apply.c 5.2 (Berkeley) %G%"; |
fcd2465c | 15 | #endif not lint |
8123553b KM |
16 | |
17 | /*%cc -s -O % | |
18 | * apply - apply a command to a set of arguments | |
19 | * | |
20 | * apply echo * == ls | |
21 | * apply -2 cmp A1 B1 A2 B2 compares A's with B's | |
22 | * apply "ln %1 /usr/fred/dir" * duplicates a directory | |
23 | */ | |
24 | #include <stdio.h> | |
25 | char *cmdp; | |
26 | #define NCHARS 512 | |
27 | char cmd[512]; | |
28 | char defargs=1; | |
29 | #define DEFARGCHAR '%' | |
30 | char argchar=DEFARGCHAR; | |
31 | int nchars; | |
fcf77ac5 SL |
32 | extern char *getenv(); |
33 | ||
8123553b KM |
34 | main(argc, argv) |
35 | char *argv[]; | |
36 | { | |
37 | register n; | |
38 | while(argc>2 && argv[1][0]=='-'){ | |
39 | if(argv[1][1]=='a'){ | |
40 | argchar=argv[1][2]; | |
41 | if(argchar=='\0') | |
42 | argchar=DEFARGCHAR; | |
43 | } else { | |
44 | defargs = atoi(&argv[1][1]); | |
45 | if(defargs < 0) | |
46 | defargs = 1; | |
47 | } | |
48 | --argc; ++argv; | |
49 | } | |
50 | if(argc<2){ | |
c6742a65 | 51 | fprintf(stderr, "usage: apply [-#] [-ac] cmd arglist\n"); |
8123553b KM |
52 | exit(1); |
53 | } | |
54 | argc -= 2; | |
55 | cmdp = argv[1]; | |
56 | argv += 2; | |
57 | while(n=docmd(argc, argv)){ | |
58 | argc -= n; | |
59 | argv += n; | |
60 | } | |
61 | } | |
62 | char | |
63 | addc(c) | |
64 | char c; | |
65 | { | |
66 | if(nchars++>=NCHARS){ | |
67 | fprintf(stderr, "apply: command too long\n"); | |
68 | exit(1); | |
69 | } | |
70 | return(c); | |
71 | } | |
72 | char * | |
73 | addarg(s, t) | |
74 | register char *s, *t; | |
75 | { | |
76 | while(*t = addc(*s++)) | |
77 | *t++; | |
78 | return(t); | |
79 | } | |
80 | docmd(argc, argv) | |
81 | char *argv[]; | |
82 | { | |
83 | register char *p, *q; | |
84 | register max, i; | |
85 | char gotit; | |
86 | if(argc<=0) | |
87 | return(0); | |
88 | nchars = 0; | |
89 | max = 0; | |
90 | gotit = 0; | |
91 | p = cmdp; | |
92 | q = cmd; | |
93 | while(*q = addc(*p++)){ | |
94 | if(*q++!=argchar || *p<'1' || '9'<*p) | |
95 | continue; | |
96 | if((i= *p++-'1') > max) | |
97 | max = i; | |
98 | if(i>=argc){ | |
99 | Toofew: | |
100 | fprintf(stderr, "apply: expecting argument(s) after `%s'\n", argv[argc-1]); | |
101 | exit(1); | |
102 | } | |
103 | q = addarg(argv[i], q-1); | |
104 | gotit++; | |
105 | } | |
106 | if(defargs!=0 && gotit==0){ | |
107 | if(defargs>argc) | |
108 | goto Toofew; | |
109 | for(i=0; i<defargs; i++){ | |
110 | *q++ = addc(' '); | |
111 | q = addarg(argv[i], q); | |
112 | } | |
113 | } | |
114 | i = system(cmd); | |
115 | if(i == 127){ | |
116 | fprintf(stderr, "apply: no shell!\n"); | |
117 | exit(1); | |
118 | } | |
119 | return(max==0? (defargs==0? 1 : defargs) : max+1); | |
120 | } | |
121 | system(s) | |
122 | char *s; | |
123 | { | |
124 | int status, pid, w; | |
125 | char *shell = getenv("SHELL"); | |
126 | ||
127 | if ((pid = fork()) == 0) { | |
128 | execl(shell ? shell : "/bin/sh", "sh", "-c", s, 0); | |
129 | _exit(127); | |
130 | } | |
131 | if(pid == -1){ | |
132 | fprintf(stderr, "apply: can't fork\n"); | |
133 | exit(1); | |
134 | } | |
135 | while ((w = wait(&status)) != pid && w != -1) | |
136 | ; | |
137 | if (w == -1) | |
138 | status = -1; | |
139 | return(status); | |
140 | } |