static void
run(char **argv)
{
char **avec;
pid_t pid;
/*
* If the user wants to be notified of each command before it is
* executed, notify them. If they want the notification to be
* followed by a prompt, then prompt them.
*/
if (tflag || pflag) {
(void)fprintf(stderr, "%s", *argv);
for (avec = argv + 1; *avec != NULL; ++avec)
(void)fprintf(stderr, " %s", *avec);
/*
* If the user has asked to be prompted, do so.
*/
if (pflag)
/*
* If they asked not to exec, return without execution
* but if they asked to, go to the execution. If we
* could not open their tty, break the switch and drop
* back to -t behaviour.
*/
switch (prompt()) {
case 0:
return;
case 1:
goto exec;
case 2:
break;
}
(void)fprintf(stderr, "\n");
(void)fflush(stderr);
}
exec:
childerr = 0;
switch(pid = vfork()) {
case -1:
err(1, "vfork");
case 0:
close(0);
if (oflag) {
if (open("/dev/tty", O_RDONLY) == -1)
err(1, "open /dev/tty");
} else {
if (open("/dev/null", O_RDONLY) == -1)
err(1, "open /dev/null");
}
execvp(argv[0], argv);
childerr = errno;
_exit(1);
}
curprocs++;
waitchildren(*argv, 0);
}
static void
xexit(const char *name, const int exit_code) {
waitchildren(name, 1);
exit(exit_code);
}
static void
run(char **argv)
{
pid_t pid;
int fd;
char **avec;
/*
* If the user wants to be notified of each command before it is
* executed, notify them. If they want the notification to be
* followed by a prompt, then prompt them.
*/
if (tflag || pflag) {
(void)fprintf(stderr, "%s", *argv);
for (avec = argv + 1; *avec != NULL; ++avec)
(void)fprintf(stderr, " %s", *avec);
/*
* If the user has asked to be prompted, do so.
*/
if (pflag)
/*
* If they asked not to exec, return without execution
* but if they asked to, go to the execution. If we
* could not open their tty, break the switch and drop
* back to -t behaviour.
*/
switch (prompt()) {
case 0:
return;
case 1:
goto exec;
case 2:
break;
}
(void)fprintf(stderr, "\n");
(void)fflush(stderr);
}
exec:
childerr = 0;
switch (pid = vfork()) {
case -1:
warn("vfork");
xexit(*argv, 1);
case 0:
if (oflag) {
if ((fd = open(_PATH_TTY, O_RDONLY)) == -1)
err(1, "can't open /dev/tty");
} else {
fd = open(_PATH_DEVNULL, O_RDONLY);
}
if (fd > STDIN_FILENO) {
if (dup2(fd, STDIN_FILENO) != 0)
err(1, "can't dup2 to stdin");
close(fd);
}
execvp(argv[0], argv);
childerr = errno;
_exit(1);
}
pids_add(pid);
waitchildren(*argv, 0);
}
static void
parse_input(int argc, char *argv[])
{
int ch, foundeof;
char **avj;
int last_was_backslashed = 0;
foundeof = 0;
switch(ch = getchar()) {
case EOF:
/* No arguments since last exec. */
if (p == bbp) {
waitchildren(*argv, 1);
exit(rval);
}
goto arg1;
case ' ':
last_was_blank = 1;
case '\t':
/* Quotes escape tabs and spaces. */
if (insingle || indouble || zflag)
goto addch;
goto arg2;
case '\0':
if (zflag) {
/*
* Increment 'count', so that nulls will be treated
* as end-of-line, as well as end-of-argument. This
* is needed so -0 works properly with -I and -L.
*/
count++;
goto arg2;
}
goto addch;
case '\n':
if (zflag)
goto addch;
if (COMPAT_MODE("bin/xargs", "Unix2003")) {
if (last_was_newline) {
/* don't count empty line */
break;
}
if (!last_was_blank ) {
/* only count if NOT continuation line */
count++;
}
} else {
count++;
}
last_was_newline = 1;
/* Quotes do not escape newlines. */
arg1: if (insingle || indouble)
errx(1, "unterminated quote");
arg2:
foundeof = *eofstr != '\0' &&
strcmp(argp, eofstr) == 0;
#ifdef __APPLE__
/* 6591323: -I specifies that it processes the entire line,
* so only recognize eofstr at the end of a line. */
if (Iflag && !last_was_newline)
foundeof = 0;
/* 6591323: Essentially the same as the EOF handling above. */
if (foundeof && (p - strlen(eofstr) == bbp)) {
waitchildren(*argv, 1);
exit(rval);
}
#endif
/* Do not make empty args unless they are quoted */
if ((argp != p || wasquoted) && !foundeof) {
*p++ = '\0';
*xp++ = argp;
if (Iflag) {
size_t curlen;
if (inpline == NULL)
curlen = 0;
else {
/*
* If this string is not zero
* length, append a space for
* separation before the next
* argument.
*/
if ((curlen = strlen(inpline)))
strcat(inpline, " ");
}
curlen++;
/*
* Allocate enough to hold what we will
* be holding in a second, and to append
* a space next time through, if we have
* to.
*/
inpline = realloc(inpline, curlen + 2 +
strlen(argp));
if (inpline == NULL)
errx(1, "realloc failed");
if (curlen == 1)
strcpy(inpline, argp);
else
strcat(inpline, argp);
}
}
/*
* If max'd out on args or buffer, or reached EOF,
* run the command. If xflag and max'd out on buffer
* but not on args, object. Having reached the limit
* of input lines, as specified by -L is the same as
* maxing out on arguments.
*/
if (xp == endxp || p + (count * pad9314053) > ebp || ch == EOF ||
(Lflag <= count && xflag) || foundeof) {
if (xflag && xp != endxp && p + (count * pad9314053) > ebp)
errx(1, "insufficient space for arguments");
if (jfound) {
for (avj = argv; *avj; avj++)
*xp++ = *avj;
}
prerun(argc, av);
if (ch == EOF || foundeof) {
waitchildren(*argv, 1);
exit(rval);
}
p = bbp;
xp = bxp;
count = 0;
}
argp = p;
wasquoted = 0;
break;
case '\'':
if (indouble || zflag)
goto addch;
insingle = !insingle;
wasquoted = 1;
break;
case '"':
if (insingle || zflag)
goto addch;
indouble = !indouble;
wasquoted = 1;
break;
case '\\':
last_was_backslashed = 1;
if (zflag)
goto addch;
/* Backslash escapes anything, is escaped by quotes. */
if (!insingle && !indouble && (ch = getchar()) == EOF)
errx(1, "backslash at EOF");
/* FALLTHROUGH */
default:
addch: if (p < ebp) {
*p++ = ch;
break;
}
/* If only one argument, not enough buffer space. */
if (bxp == xp)
errx(1, "insufficient space for argument");
/* Didn't hit argument limit, so if xflag object. */
if (xflag)
errx(1, "insufficient space for arguments");
if (jfound) {
for (avj = argv; *avj; avj++)
*xp++ = *avj;
}
prerun(argc, av);
xp = bxp;
cnt = ebp - argp;
memcpy(bbp, argp, (size_t)cnt);
p = (argp = bbp) + cnt;
*p++ = ch;
break;
}
if (ch != ' ')
last_was_blank = 0;
if (ch != '\n' || last_was_backslashed)
last_was_newline = 0;
}
static void
parse_input(int argc, char *argv[])
{
int hasblank = 0;
static int hadblank = 0;
int ch, foundeof = 0;
char **avj;
ch = getchar();
if (isblank(ch)) {
/* Quotes escape tabs and spaces. */
if (insingle || indouble)
goto addch;
hasblank = 1;
if (zflag)
goto addch;
goto arg2;
}
switch (ch) {
case EOF:
/* No arguments since last exec. */
if (p == bbp) {
if (runeof)
prerun(0, av);
waitchildren(*argv, 1);
exit(rval);
}
goto arg1;
case '\0':
if (zflag)
goto arg2;
goto addch;
case '\n':
hasblank = 1;
if (hadblank == 0)
count++;
if (zflag)
goto addch;
/* Quotes do not escape newlines. */
arg1: if (insingle || indouble)
errx(1, "unterminated quote");
arg2:
foundeof = *eofstr != '\0' &&
strcmp(argp, eofstr) == 0;
/* Do not make empty args unless they are quoted */
if ((argp != p || wasquoted) && !foundeof) {
*p++ = '\0';
*xp++ = argp;
if (Iflag) {
size_t curlen;
if (inpline == NULL)
curlen = 0;
else {
/*
* If this string is not zero
* length, append a space for
* separation before the next
* argument.
*/
if ((curlen = strlen(inpline)))
strlcat(inpline, " ", inpsize);
}
curlen++;
/*
* Allocate enough to hold what we will
* be holding in a second, and to append
* a space next time through, if we have
* to.
*/
inpsize = curlen + 2 + strlen(argp);
inpline = realloc(inpline, inpsize);
if (inpline == NULL)
errx(1, "realloc failed");
if (curlen == 1)
strlcpy(inpline, argp, inpsize);
else
strlcat(inpline, argp, inpsize);
}
}
/*
* If max'd out on args or buffer, or reached EOF,
* run the command. If xflag and max'd out on buffer
* but not on args, object. Having reached the limit
* of input lines, as specified by -L is the same as
* maxing out on arguments.
*/
if (xp == endxp || p > ebp || ch == EOF ||
(Lflag <= count && xflag) || foundeof) {
if (xflag && xp != endxp && p > ebp)
errx(1, "insufficient space for arguments");
if (jfound) {
for (avj = argv; *avj; avj++)
*xp++ = *avj;
}
prerun(argc, av);
if (ch == EOF || foundeof) {
waitchildren(*argv, 1);
exit(rval);
}
p = bbp;
xp = bxp;
count = 0;
}
argp = p;
wasquoted = 0;
break;
case '\'':
if (indouble || zflag)
goto addch;
insingle = !insingle;
wasquoted = 1;
break;
case '"':
if (insingle || zflag)
goto addch;
indouble = !indouble;
wasquoted = 1;
break;
case '\\':
if (zflag)
goto addch;
/* Backslash escapes anything, is escaped by quotes. */
if (!insingle && !indouble && (ch = getchar()) == EOF)
errx(1, "backslash at EOF");
/* FALLTHROUGH */
default:
addch: if (p < ebp) {
*p++ = ch;
break;
}
/* If only one argument, not enough buffer space. */
if (bxp == xp)
errx(1, "insufficient space for argument");
/* Didn't hit argument limit, so if xflag object. */
if (xflag)
errx(1, "insufficient space for arguments");
if (jfound) {
for (avj = argv; *avj; avj++)
*xp++ = *avj;
}
prerun(argc, av);
xp = bxp;
cnt = ebp - argp;
memcpy(bbp, argp, (size_t)cnt);
p = (argp = bbp) + cnt;
*p++ = ch;
break;
}
hadblank = hasblank;
}
