diff options
Diffstat (limited to 'toys')
| -rw-r--r-- | toys/posix/xargs.c | 50 |
1 files changed, 33 insertions, 17 deletions
diff --git a/toys/posix/xargs.c b/toys/posix/xargs.c index d25a2e3f..e23d14c4 100644 --- a/toys/posix/xargs.c +++ b/toys/posix/xargs.c @@ -5,28 +5,28 @@ * See http://opengroup.org/onlinepubs/9699919799/utilities/xargs.html * * TODO: Rich's whitespace objection, env size isn't fixed anymore. + * TODO: -x Exit if can't fit everything in one command + * TODO: -L Max number of lines of input per command -USE_XARGS(NEWTOY(xargs, "^I:E:L#ptxrn#<1s#0[!0E]", TOYFLAG_USR|TOYFLAG_BIN)) +USE_XARGS(NEWTOY(xargs, "^I:E:ptrn#<1s#0[!0E]", TOYFLAG_USR|TOYFLAG_BIN)) config XARGS bool "xargs" default y help - usage: xargs [-ptxr0] [-s NUM] [-n NUM] [-L NUM] [-E STR] COMMAND... + usage: xargs [-0prt] [-s NUM] [-n NUM] [-E STR] COMMAND... Run command line one or more times, appending arguments from stdin. If command exits with 255, don't launch another even if arguments remain. - -s Size in bytes per command line - -n Max number of arguments per command -0 Each argument is NULL terminated, no whitespace or quote processing - #-p Prompt for y/n from tty before running each command - #-t Trace, print command line to stderr - #-x Exit if can't fit everything in one command - #-r Don't run command with empty input - #-L Max number of lines of input per command - -E stop at line matching string + -E Stop at line matching string + -n Max number of arguments per command + -p Prompt for y/n from tty before running each command + -r Don't run command with empty input + -s Size in bytes per command line + -t Trace, print command line to stderr config XARGS_PEDANTIC bool "TODO xargs pedantic posix compatability" @@ -41,7 +41,7 @@ config XARGS_PEDANTIC #include "toys.h" GLOBALS( - long s, n, L; + long s, n; char *E, *I; long entries, bytes; @@ -134,6 +134,8 @@ void xargs_main(void) // Loop through exec chunks. while (data || !done) { + int doit = 1; + TT.entries = 0; TT.bytes = bytes; @@ -163,6 +165,8 @@ void xargs_main(void) break; } + if (TT.entries == 0 && FLAG(r)) continue; + // Accumulate cally thing if (data && !TT.entries) error_exit("argument too long"); @@ -176,13 +180,25 @@ void xargs_main(void) for (dtemp = dlist; dtemp; dtemp = dtemp->next) handle_entries(dtemp->data, out+entries); - if (!(pid = XVFORK())) { - xclose(0); - open("/dev/null", O_RDONLY); - xexec(out); + if (FLAG(p) || FLAG(t)) { + int i; + + for (i = 0; out[i]; ++i) fprintf(stderr, "%s ", out[i]); + if (FLAG(p)) { + fprintf(stderr, "?"); + doit = yesno(0); + } else fprintf(stderr, "\n"); + } + + if (doit) { + if (!(pid = XVFORK())) { + xclose(0); + open("/dev/null", O_RDONLY); + xexec(out); + } + waitpid(pid, &status, 0); + status = WIFEXITED(status) ? WEXITSTATUS(status) : WTERMSIG(status)+127; } - waitpid(pid, &status, 0); - status = WIFEXITED(status) ? WEXITSTATUS(status) : WTERMSIG(status)+127; // Abritrary number of execs, can't just leak memory each time... while (dlist) { |