mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
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a3d1ee10d1
This commit squashes several commits that remove:
unnecessary uname calls
`sh -c'
BUILT_INS and QUIET_BUILT_IN
They have no effect, and the `fixup-builtins' and `check-builtins.sh'
scripts don't even exist.
RUNTIME_PREFIX
It's currently never anything but unset, and it's apparently
only meaningful when Microsoft Windows is the operating system
(according to the source for git).
TEST_PROGRAMS
EXTRA_PROGRAMS
unused SHELL_PATH_SQ portions
unused test for V=2
useless exports
Only when `V' is undefined (that is, only when the value of `V'
is empty) is `export V' performed, which just has the effect of
placing the empty-valued variable `V' in the environment.
The only other script to make use of `V' is `Documentation/Makefile',
which only checks whether `V' is undefined (that is, whether the value
of `V' is empty); hence, the `export V' has no effect whatsoever.
Similarly, `export QUIET_GEN' is useless because it will only have
a non-empty value when `V' has an empty-value, and when `V' has
an empty-value, `QUIET_GEN' is always explicitly set in every
script in which it is used.
`DESTDIR' is only ever defined by the user via the environment
or the command line, both of which are automatically exported
to sub-make processes. Furthermore, no non-make sub-scripts
make use of `DESTDIR' as an environment variable.
No other scripts use `perfexec_instdir'.
unused QUIET_SUBDIR{0,1}
TAR and RPMBUILD
PTHREAD_LIBS
Maintainer's dist rules and commands
distclean target
Test suite coverage testing
PRINT_DIR and NO_SUBDIR
`configure' target
NO_CURL
@@PERF_VERSION@@ substitution
Without the sed command, all of the rule's commands can be reduced
to a single line that copies a file and sets the permissions properly
in the process.
`make test' echo line
template_instdir
PERF-BUILD-OPTIONS
double-colon rules
The use of double-colon rules seems misguided or vestigial git.
Essentially hard-coded $(SCRIPTS) expansion
Signed-off-by: Michael Witten <mfwitten@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
149 lines
2.7 KiB
C
149 lines
2.7 KiB
C
#include "cache.h"
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#include "exec_cmd.h"
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#include "quote.h"
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#include <string.h>
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#define MAX_ARGS 32
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static const char *argv_exec_path;
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static const char *argv0_path;
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const char *system_path(const char *path)
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{
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static const char *prefix = PREFIX;
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struct strbuf d = STRBUF_INIT;
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if (is_absolute_path(path))
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return path;
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strbuf_addf(&d, "%s/%s", prefix, path);
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path = strbuf_detach(&d, NULL);
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return path;
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}
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const char *perf_extract_argv0_path(const char *argv0)
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{
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const char *slash;
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if (!argv0 || !*argv0)
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return NULL;
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slash = argv0 + strlen(argv0);
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while (argv0 <= slash && !is_dir_sep(*slash))
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slash--;
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if (slash >= argv0) {
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argv0_path = strndup(argv0, slash - argv0);
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return argv0_path ? slash + 1 : NULL;
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}
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return argv0;
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}
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void perf_set_argv_exec_path(const char *exec_path)
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{
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argv_exec_path = exec_path;
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/*
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* Propagate this setting to external programs.
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*/
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setenv(EXEC_PATH_ENVIRONMENT, exec_path, 1);
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}
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/* Returns the highest-priority, location to look for perf programs. */
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const char *perf_exec_path(void)
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{
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const char *env;
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if (argv_exec_path)
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return argv_exec_path;
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env = getenv(EXEC_PATH_ENVIRONMENT);
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if (env && *env) {
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return env;
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}
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return system_path(PERF_EXEC_PATH);
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}
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static void add_path(struct strbuf *out, const char *path)
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{
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if (path && *path) {
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if (is_absolute_path(path))
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strbuf_addstr(out, path);
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else
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strbuf_addstr(out, make_nonrelative_path(path));
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strbuf_addch(out, PATH_SEP);
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}
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}
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void setup_path(void)
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{
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const char *old_path = getenv("PATH");
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struct strbuf new_path = STRBUF_INIT;
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add_path(&new_path, perf_exec_path());
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add_path(&new_path, argv0_path);
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if (old_path)
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strbuf_addstr(&new_path, old_path);
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else
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strbuf_addstr(&new_path, "/usr/local/bin:/usr/bin:/bin");
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setenv("PATH", new_path.buf, 1);
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strbuf_release(&new_path);
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}
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static const char **prepare_perf_cmd(const char **argv)
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{
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int argc;
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const char **nargv;
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for (argc = 0; argv[argc]; argc++)
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; /* just counting */
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nargv = malloc(sizeof(*nargv) * (argc + 2));
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nargv[0] = "perf";
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for (argc = 0; argv[argc]; argc++)
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nargv[argc + 1] = argv[argc];
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nargv[argc + 1] = NULL;
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return nargv;
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}
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int execv_perf_cmd(const char **argv) {
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const char **nargv = prepare_perf_cmd(argv);
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/* execvp() can only ever return if it fails */
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execvp("perf", (char **)nargv);
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free(nargv);
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return -1;
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}
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int execl_perf_cmd(const char *cmd,...)
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{
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int argc;
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const char *argv[MAX_ARGS + 1];
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const char *arg;
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va_list param;
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va_start(param, cmd);
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argv[0] = cmd;
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argc = 1;
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while (argc < MAX_ARGS) {
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arg = argv[argc++] = va_arg(param, char *);
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if (!arg)
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break;
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}
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va_end(param);
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if (MAX_ARGS <= argc)
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return error("too many args to run %s", cmd);
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argv[argc] = NULL;
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return execv_perf_cmd(argv);
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}
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