3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
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9 * modification, are permitted provided that the following conditions
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15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
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20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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39 static char sccsid[] = "@(#)apply.c 8.4 (Berkeley) 4/4/94";
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
46 #include <sys/types.h>
60 static int exec_shell(const char *, char *, char *);
61 static void usage(void);
64 main(int argc, char *argv[]) {
65 int ch, debug, i, magic, n, nargs, offset, rval;
66 size_t clen, cmdsize, l;
67 char *c, *cmd, *name, *p, *q, *shell, *slashp, *tmpshell;
70 magic = '%'; /* Default magic char is `%'. */
72 while ((ch = getopt(argc, argv, "a:d0123456789")) != -1)
75 if (optarg[1] != '\0')
77 "illegal magic character specification");
83 case '0': case '1': case '2': case '3': case '4':
84 case '5': case '6': case '7': case '8': case '9':
87 "only one -# argument may be specified");
100 * The command to run is argv[0], and the args are argv[1..].
101 * Look for %digit references in the command, remembering the
104 for (n = 0, p = argv[0]; *p != '\0'; ++p)
105 if (p[0] == magic && isdigit(p[1]) && p[1] != '0') {
112 * Figure out the shell and name arguments to pass to execl()
113 * in exec_shell(). Always malloc() shell and just set name
114 * to point at the last part of shell if there are any backslashes,
115 * otherwise just set it to point at the space malloc()'d. If
116 * SHELL environment variable exists, replace contents of
120 tmpshell = getenv("SHELL");
121 shell = (tmpshell != NULL) ? strdup(tmpshell) : strdup(_PATH_BSHELL);
123 err(1, "strdup() failed");
124 slashp = strrchr(shell, '/');
125 name = (slashp != NULL) ? slashp + 1 : shell;
128 * If there were any %digit references, then use those, otherwise
129 * build a new command string with sufficient %digit references at
130 * the end to consume (nargs) arguments each time round the loop.
131 * Allocate enough space to hold the maximum command. Save the
132 * size to pass to snprintf().
134 cmdsize = sizeof(EXEC) - 1 + strlen(argv[0])
135 + 9 * (sizeof(" %1") - 1) + 1;
136 if ((cmd = malloc(cmdsize)) == NULL)
140 /* If nargs not set, default to a single argument. */
145 offset = snprintf(cmd, cmdsize, EXEC "%s", argv[0]);
146 if ((size_t)offset >= cmdsize)
147 err(1, "snprintf() failed");
150 for (i = 1; i <= nargs; i++) {
151 offset = snprintf(p, cmdsize, " %c%d", magic, i);
152 if ((size_t)offset >= cmdsize)
153 err(1, "snprintf() failed");
159 * If nargs set to the special value 0, eat a single
160 * argument for each command execution.
165 offset = snprintf(cmd, cmdsize, EXEC "%s", argv[0]);
166 if ((size_t)offset >= cmdsize)
167 err(1, "snprintf() failed");
172 * Grab some space in which to build the command. Allocate
173 * as necessary later, but no reason to build it up slowly
174 * for the normal case.
176 if ((c = malloc(clen = 1024)) == NULL)
180 * (argc) and (argv) are still offset by one to make it simpler to
181 * expand %digit references. At the end of the loop check for (argc)
182 * equals 1 means that all the (argv) has been consumed.
184 for (rval = 0; argc > nargs; argc -= nargs, argv += nargs) {
186 * Find a max value for the command length, and ensure
187 * there's enough space to build it.
189 for (l = strlen(cmd), i = 0; i < nargs; i++)
190 l += strlen(argv[i+1]);
191 if (l > clen && (c = realloc(c, clen = l)) == NULL)
194 /* Expand command argv references. */
195 for (p = cmd, q = c; *p != '\0'; ++p)
196 if (p[0] == magic && isdigit(p[1]) && p[1] != '0') {
197 offset = snprintf(q, l, "%s",
198 argv[(++p)[0] - '0']);
199 if ((size_t)offset >= l)
200 err(1, "snprintf() failed");
206 /* Terminate the command string. */
209 /* Run the command. */
211 (void)printf("%s\n", c);
213 if (exec_shell(c, shell, name))
218 errx(1, "expecting additional argument%s after \"%s\"",
219 (nargs - argc) ? "s" : "", argv[argc - 1]);
228 * Execute a shell command using passed use_shell and use_name
232 exec_shell(const char *command, char *use_shell, char *use_name)
236 sig_t intsave, quitsave;
238 if (!command) /* just checking... */
241 omask = sigblock(sigmask(SIGCHLD));
242 switch(pid = vfork()) {
246 (void)sigsetmask(omask);
247 execl(use_shell, use_name, "-c", command, (char *)NULL);
248 warn("%s", use_shell);
251 intsave = signal(SIGINT, SIG_IGN);
252 quitsave = signal(SIGQUIT, SIG_IGN);
253 pid = waitpid(pid, &pstat, 0);
254 (void)sigsetmask(omask);
255 (void)signal(SIGINT, intsave);
256 (void)signal(SIGQUIT, quitsave);
257 return(pid == -1 ? -1 : pstat);
264 (void)fprintf(stderr,
265 "usage: apply [-a magic] [-d] [-0123456789] command arguments ...\n");