2 * Copyright (c) 1988, 1989, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1988, 1989 by Adam de Boor
5 * Copyright (c) 1989 by Berkeley Softworks
8 * This code is derived from software contributed to Berkeley by
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21 * This product includes software developed by the University of
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39 * $DragonFly: src/usr.bin/make/shell.c,v 1.8 2005/05/20 11:47:22 okumoto Exp $
47 #include "pathnames.h"
51 static char *shellName = NULL; /* last component of shell */
52 char *shellPath = NULL; /* full pathname of executable image */
53 struct Shell *commandShell = NULL;
56 * Find a matching shell in 'shells' given its final component.
59 * A pointer to a Shell structure, or NULL if no shell with
60 * the given name is found.
63 ShellMatch(const char name[])
66 shell = emalloc(sizeof(struct Shell));
68 if (strcmp(name, "csh") == 0) {
70 * CSH description. The csh can do echo control by playing
71 * with the setting of the 'echo' shell variable. Sadly,
72 * however, it is unable to do error control nicely.
74 shell->name = strdup("csh");
75 shell->hasEchoCtl = TRUE;
76 shell->echoOff = strdup("unset verbose");
77 shell->echoOn = strdup("set verbose");
78 shell->noPrint = strdup("unset verbose");
79 shell->hasErrCtl = FALSE;
80 shell->errCheck = strdup("echo \"%s\"\n");
81 shell->ignErr = strdup("csh -c \"%s || exit 0\"");
82 shell->echo = strdup("v");
83 shell->exit = strdup("e");
85 } else if (strcmp(name, "sh") == 0) {
87 * SH description. Echo control is also possible and, under
88 * sun UNIX anyway, one can even control error checking.
91 shell->name = strdup("sh");
92 shell->hasEchoCtl = TRUE;
93 shell->echoOff = strdup("set -");
94 shell->echoOn = strdup("set -v");
95 shell->noPrint = strdup("set -");
97 shell->hasErrCtl = FALSE;
98 shell->errCheck = strdup("echo \"%s\"\n");
99 shell->ignErr = strdup("sh -c '%s || exit 0'\n");
101 shell->hasErrCtl = TRUE;
102 shell->errCheck = strdup("set -e");
103 shell->ignErr = strdup("set +e");
105 shell->echo = strdup("v");
106 shell->exit = strdup("e");
107 } else if (strcmp(name, "ksh") == 0) {
109 * KSH description. The Korn shell has a superset of
110 * the Bourne shell's functionality.
112 shell->name = strdup("ksh");
113 shell->hasEchoCtl = TRUE;
114 shell->echoOff = strdup("set -");
115 shell->echoOn = strdup("set -v");
116 shell->noPrint = strdup("set -");
117 shell->hasErrCtl = TRUE;
118 shell->errCheck = strdup("set -e");
119 shell->ignErr = strdup("set +e");
120 shell->echo = strdup("v");
121 shell->exit = strdup("e");
131 * Make a new copy of the shell structure including a copy of the strings
132 * in it. This also defaults some fields in case they are NULL.
135 * The function returns a pointer to the new shell structure.
137 static struct Shell *
138 JobCopyShell(const struct Shell *osh)
142 nsh = emalloc(sizeof(*nsh));
143 nsh->name = estrdup(osh->name);
145 if (osh->echoOff != NULL)
146 nsh->echoOff = estrdup(osh->echoOff);
149 if (osh->echoOn != NULL)
150 nsh->echoOn = estrdup(osh->echoOn);
153 nsh->hasEchoCtl = osh->hasEchoCtl;
155 if (osh->noPrint != NULL)
156 nsh->noPrint = estrdup(osh->noPrint);
160 nsh->hasErrCtl = osh->hasErrCtl;
161 if (osh->errCheck == NULL)
162 nsh->errCheck = estrdup("");
164 nsh->errCheck = estrdup(osh->errCheck);
165 if (osh->ignErr == NULL)
166 nsh->ignErr = estrdup("%s");
168 nsh->ignErr = estrdup(osh->ignErr);
170 if (osh->echo == NULL)
171 nsh->echo = estrdup("");
173 nsh->echo = estrdup(osh->echo);
175 if (osh->exit == NULL)
176 nsh->exit = estrdup("");
178 nsh->exit = estrdup(osh->exit);
184 * Free a shell structure and all associated strings.
187 JobFreeShell(struct Shell *sh)
204 * Given the line following a .SHELL target, parse the
205 * line as a shell specification. Returns FALSE if the
206 * spec was incorrect.
208 * Parse a shell specification and set up commandShell, shellPath appropriately.
211 * TRUE if the specification was correct. FALSE otherwise.
214 * commandShell points to a Shell structure (either predefined or
215 * created from the shell spec), shellPath is the full path of the
216 * shell described by commandShell, while shellName is just the
217 * final component of shellPath.
220 * A shell specification consists of a .SHELL target, with dependency
221 * operator, followed by a series of blank-separated words. Double
222 * quotes can be used to use blanks in words. A backslash escapes
223 * anything (most notably a double-quote and a space) and
224 * provides the functionality it does in C. Each word consists of
225 * keyword and value separated by an equal sign. There should be no
226 * unnecessary spaces in the word. The keywords are as follows:
227 * name Name of shell.
228 * path Location of shell. Overrides "name" if given
229 * quiet Command to turn off echoing.
230 * echo Command to turn echoing on
231 * filter Result of turning off echoing that shouldn't be
233 * echoFlag Flag to turn echoing on at the start
234 * errFlag Flag to turn error checking on at the start
235 * hasErrCtl True if shell has error checking control
236 * check Command to turn on error checking if hasErrCtl
237 * is TRUE or template of command to echo a command
238 * for which error checking is off if hasErrCtl is
240 * ignore Command to turn off error checking if hasErrCtl
241 * is TRUE or template of command to execute a
242 * command so as to ignore any errors it returns if
243 * hasErrCtl is FALSE.
246 Job_ParseShell(const char line[])
252 Boolean fullSpec = FALSE;
253 struct Shell newShell;
256 memset(&newShell, 0, sizeof(newShell));
260 * Parse the specification by keyword but skip the first word
262 brk_string(&aa, line, TRUE);
264 for (argc = aa.argc - 1, argv = aa.argv + 1; argc != 0; argc--, argv++)
269 * Split keyword and value
271 if ((eq = strchr(*argv, '=')) == NULL) {
272 Parse_Error(PARSE_FATAL, "missing '=' in shell "
273 "specification keyword '%s'", *argv);
279 if (strcmp(*argv, "path") == 0) {
281 } else if (strcmp(*argv, "name") == 0) {
283 } else if (strcmp(*argv, "quiet") == 0) {
284 newShell.echoOff = eq;
286 } else if (strcmp(*argv, "echo") == 0) {
287 newShell.echoOn = eq;
289 } else if (strcmp(*argv, "filter") == 0) {
290 newShell.noPrint = eq;
292 } else if (strcmp(*argv, "echoFlag") == 0) {
295 } else if (strcmp(*argv, "errFlag") == 0) {
298 } else if (strcmp(*argv, "hasErrCtl") == 0) {
299 newShell.hasErrCtl = (*eq == 'Y' || *eq == 'y' ||
300 *eq == 'T' || *eq == 't');
302 } else if (strcmp(*argv, "check") == 0) {
303 newShell.errCheck = eq;
305 } else if (strcmp(*argv, "ignore") == 0) {
306 newShell.ignErr = eq;
309 Parse_Error(PARSE_FATAL, "unknown keyword in shell "
310 "specification '%s'", *argv);
317 * Some checks (could be more)
320 if ((newShell.echoOn != NULL) ^ (newShell.echoOff != NULL))
321 Parse_Error(PARSE_FATAL, "Shell must have either both "
322 "echoOff and echoOn or none of them");
324 if (newShell.echoOn != NULL && newShell.echoOff)
325 newShell.hasEchoCtl = TRUE;
330 * If no path was given, the user wants one of the pre-defined
331 * shells, yes? So we find the one s/he wants with the help of
332 * ShellMatch and set things up the right way. shellPath
333 * will be set up by Job_Init.
335 if (newShell.name == NULL) {
336 Parse_Error(PARSE_FATAL,
337 "Neither path nor name specified");
341 if ((sh = ShellMatch(newShell.name)) == NULL) {
342 Parse_Error(PARSE_FATAL, "%s: no matching shell",
350 * The user provided a path. If s/he gave nothing else
351 * (fullSpec is FALSE), try and find a matching shell in the
352 * ones we know of. Else we just take the specification at its
353 * word and copy it to a new location. In either case, we need
354 * to record the path the user gave for the shell.
356 path = estrdup(path);
357 if (newShell.name == NULL) {
358 /* get the base name as the name */
359 if ((newShell.name = strrchr(path, '/')) == NULL) {
360 newShell.name = path;
367 if ((sh = ShellMatch(newShell.name)) == NULL) {
368 Parse_Error(PARSE_FATAL,
369 "%s: no matching shell", newShell.name);
375 sh = JobCopyShell(&newShell);
381 /* set the new shell */
382 JobFreeShell(commandShell);
385 shellName = commandShell->name;
394 commandShell = ShellMatch(DEFSHELLNAME);
397 * Both the absolute path and the last component
398 * must be set. The last component is taken from the 'name'
399 * field of the default shell description pointed-to by
400 * commandShell. All default shells are located in
403 shellName = commandShell->name;
404 shellPath = str_concat(