#include #include #include #include #include #include #include #include #include "subcmd-util.h" #include "exec-cmd.h" #include "subcmd-config.h" #define MAX_ARGS 32 #define PATH_MAX 4096 static const char *argv_exec_path; static const char *argv0_path; void exec_cmd_init(const char *exec_name, const char *prefix, const char *exec_path, const char *exec_path_env) { subcmd_config.exec_name = exec_name; subcmd_config.prefix = prefix; subcmd_config.exec_path = exec_path; subcmd_config.exec_path_env = exec_path_env; } #define is_dir_sep(c) ((c) == '/') static int is_absolute_path(const char *path) { return path[0] == '/'; } static const char *get_pwd_cwd(void) { static char cwd[PATH_MAX + 1]; char *pwd; struct stat cwd_stat, pwd_stat; if (getcwd(cwd, PATH_MAX) == NULL) return NULL; pwd = getenv("PWD"); if (pwd && strcmp(pwd, cwd)) { stat(cwd, &cwd_stat); if (!stat(pwd, &pwd_stat) && pwd_stat.st_dev == cwd_stat.st_dev && pwd_stat.st_ino == cwd_stat.st_ino) { strlcpy(cwd, pwd, PATH_MAX); } } return cwd; } static const char *make_nonrelative_path(const char *path) { static char buf[PATH_MAX + 1]; if (is_absolute_path(path)) { if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX) die("Too long path: %.*s", 60, path); } else { const char *cwd = get_pwd_cwd(); if (!cwd) die("Cannot determine the current working directory"); if (snprintf(buf, PATH_MAX, "%s/%s", cwd, path) >= PATH_MAX) die("Too long path: %.*s", 60, path); } return buf; } char *system_path(const char *path) { char *buf = NULL; if (is_absolute_path(path)) return strdup(path); astrcatf(&buf, "%s/%s", subcmd_config.prefix, path); return buf; } const char *extract_argv0_path(const char *argv0) { const char *slash; if (!argv0 || !*argv0) return NULL; slash = argv0 + strlen(argv0); while (argv0 <= slash && !is_dir_sep(*slash)) slash--; if (slash >= argv0) { argv0_path = strndup(argv0, slash - argv0); return argv0_path ? slash + 1 : NULL; } return argv0; } void set_argv_exec_path(const char *exec_path) { argv_exec_path = exec_path; /* * Propagate this setting to external programs. */ setenv(subcmd_config.exec_path_env, exec_path, 1); } /* Returns the highest-priority location to look for subprograms. */ char *get_argv_exec_path(void) { char *env; if (argv_exec_path) return strdup(argv_exec_path); env = getenv(subcmd_config.exec_path_env); if (env && *env) return strdup(env); return system_path(subcmd_config.exec_path); } static void add_path(char **out, const char *path) { if (path && *path) { if (is_absolute_path(path)) astrcat(out, path); else astrcat(out, make_nonrelative_path(path)); astrcat(out, ":"); } } void setup_path(void) { const char *old_path = getenv("PATH"); char *new_path = NULL; char *tmp = get_argv_exec_path(); add_path(&new_path, tmp); add_path(&new_path, argv0_path); free(tmp); if (old_path) astrcat(&new_path, old_path); else astrcat(&new_path, "/usr/local/bin:/usr/bin:/bin"); setenv("PATH", new_path, 1); free(new_path); } static const char **prepare_exec_cmd(const char **argv) { int argc; const char **nargv; for (argc = 0; argv[argc]; argc++) ; /* just counting */ nargv = malloc(sizeof(*nargv) * (argc + 2)); nargv[0] = subcmd_config.exec_name; for (argc = 0; argv[argc]; argc++) nargv[argc + 1] = argv[argc]; nargv[argc + 1] = NULL; return nargv; } int execv_cmd(const char **argv) { const char **nargv = prepare_exec_cmd(argv); /* execvp() can only ever return if it fails */ execvp(subcmd_config.exec_name, (char **)nargv); free(nargv); return -1; } int execl_cmd(const char *cmd,...) { int argc; const char *argv[MAX_ARGS + 1]; const char *arg; va_list param; va_start(param, cmd); argv[0] = cmd; argc = 1; while (argc < MAX_ARGS) { arg = argv[argc++] = va_arg(param, char *); if (!arg) break; } va_end(param); if (MAX_ARGS <= argc) { fprintf(stderr, " Error: too many args to run %s\n", cmd); return -1; } argv[argc] = NULL; return execv_cmd(argv); } 20space:mode:
authorZach Ploskey <zach@ploskey.com>2017-01-22 00:47:19 -0800
committerAndy Shevchenko <andriy.shevchenko@linux.intel.com>2017-01-22 12:47:06 +0200
commitcfee5d63767b2e7997c1f36420d008abbe61565c (patch)
treec66a512525d224f9675c33a8d156e0f058db1de6 /tools/perf/Documentation
parent5a00b6c2438460b870a451f14593fc40d3c7edf6 (diff)
platform/x86: ideapad-laptop: handle ACPI event 1
On Ideapad laptops, ACPI event 1 is currently not handled. Many models log "ideapad_laptop: Unknown event: 1" every 20 seconds or so while running on battery power. Some convertible laptops receive this event when switching in and out of tablet mode. This adds and additional case for event 1 in ideapad_acpi_notify to call ideapad_input_report(priv, vpc_bit), so that the event is reported to userspace and we avoid unnecessary logging. Fixes bug #107481 (https://bugzilla.kernel.org/show_bug.cgi?id=107481) Fixes bug #65751 (https://bugzilla.kernel.org/show_bug.cgi?id=65751) Signed-off-by: Zach Ploskey <zach@ploskey.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'tools/perf/Documentation')