Run clang-format on the whole tree
[lttng-tools.git] / src / common / utils.cpp
index 89ef0e54fd01714ea866c05dd2424cd1f21c26e5..71104c8e87868363f3fb8353860c6e5967c257af 100644 (file)
@@ -7,17 +7,9 @@
  */
 
 #define _LGPL_SOURCE
-#include <ctype.h>
-#include <fcntl.h>
-#include <grp.h>
-#include <inttypes.h>
-#include <limits.h>
-#include <pwd.h>
-#include <stdlib.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
+#include "defaults.hpp"
+#include "time.hpp"
+#include "utils.hpp"
 
 #include <common/common.hpp>
 #include <common/compat/directory-handle.hpp>
 #include <common/readwrite.hpp>
 #include <common/runas.hpp>
 #include <common/string-utils/format.hpp>
+
 #include <lttng/constant.h>
 
-#include "defaults.hpp"
-#include "time.hpp"
-#include "utils.hpp"
+#include <ctype.h>
+#include <fcntl.h>
+#include <grp.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <pwd.h>
+#include <stdlib.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
 
-#define PROC_MEMINFO_PATH               "/proc/meminfo"
-#define PROC_MEMINFO_MEMAVAILABLE_LINE  "MemAvailable:"
-#define PROC_MEMINFO_MEMTOTAL_LINE      "MemTotal:"
+#define PROC_MEMINFO_PATH             "/proc/meminfo"
+#define PROC_MEMINFO_MEMAVAILABLE_LINE "MemAvailable:"
+#define PROC_MEMINFO_MEMTOTAL_LINE     "MemTotal:"
 
 /* The length of the longest field of `/proc/meminfo`. */
-#define PROC_MEMINFO_FIELD_MAX_NAME_LEN        20
+#define PROC_MEMINFO_FIELD_MAX_NAME_LEN 20
 
 #if (PROC_MEMINFO_FIELD_MAX_NAME_LEN == 20)
 #define MAX_NAME_LEN_SCANF_IS_A_BROKEN_API "19"
@@ -47,7 +48,7 @@
 #error MAX_NAME_LEN_SCANF_IS_A_BROKEN_API must be updated to match (PROC_MEMINFO_FIELD_MAX_NAME_LEN - 1)
 #endif
 
-#define FALLBACK_USER_BUFLEN 16384
+#define FALLBACK_USER_BUFLEN  16384
 #define FALLBACK_GROUP_BUFLEN 16384
 
 /*
@@ -217,7 +218,7 @@ int utils_create_pid_file(pid_t pid, const char *filepath)
 
        LTTNG_ASSERT(filepath);
 
-       fd = open(filepath, O_CREAT | O_WRONLY, S_IRUSR |S_IWUSR | S_IRGRP | S_IROTH);
+       fd = open(filepath, O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
        if (fd < 0) {
                PERROR("open file %s", filepath);
                ret = -1;
@@ -229,7 +230,8 @@ int utils_create_pid_file(pid_t pid, const char *filepath)
                PERROR("fdopen file %s", filepath);
                ret = -1;
                if (close(fd)) {
-                       PERROR("Failed to close `%s` file descriptor while handling fdopen error", filepath);
+                       PERROR("Failed to close `%s` file descriptor while handling fdopen error",
+                              filepath);
                }
 
                goto error;
@@ -265,8 +267,7 @@ int utils_create_lock_file(const char *filepath)
        LTTNG_ASSERT(filepath);
 
        memset(&lock, 0, sizeof(lock));
-       fd = open(filepath, O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR |
-               S_IRGRP | S_IWGRP);
+       fd = open(filepath, O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
        if (fd < 0) {
                PERROR("open lock file %s", filepath);
                fd = -1;
@@ -284,8 +285,7 @@ int utils_create_lock_file(const char *filepath)
        ret = fcntl(fd, F_SETLK, &lock);
        if (ret == -1) {
                PERROR("fcntl lock file");
-               ERR("Could not get lock file %s, another instance is running.",
-                       filepath);
+               ERR("Could not get lock file %s, another instance is running.", filepath);
                if (close(fd)) {
                        PERROR("close lock file");
                }
@@ -317,8 +317,7 @@ int utils_mkdir(const char *path, mode_t mode, int uid, int gid)
                goto end;
        }
        ret = lttng_directory_handle_create_subdirectory_as_user(
-                       handle, path, mode,
-                       (uid >= 0 || gid >= 0) ? &creds : NULL);
+               handle, path, mode, (uid >= 0 || gid >= 0) ? &creds : NULL);
 end:
        lttng_directory_handle_put(handle);
        return ret;
@@ -345,8 +344,7 @@ int utils_mkdir_recursive(const char *path, mode_t mode, int uid, int gid)
                goto end;
        }
        ret = lttng_directory_handle_create_subdirectory_recursive_as_user(
-                       handle, path, mode,
-                       (uid >= 0 || gid >= 0) ? &creds : NULL);
+               handle, path, mode, (uid >= 0 || gid >= 0) ? &creds : NULL);
 end:
        lttng_directory_handle_put(handle);
        return ret;
@@ -357,32 +355,39 @@ end:
  *
  * Return 0 on success or else a negative value.
  */
-int utils_stream_file_path(const char *path_name, const char *file_name,
-               uint64_t size, uint64_t count, const char *suffix,
-               char *out_stream_path, size_t stream_path_len)
+int utils_stream_file_path(const char *path_name,
+                          const char *file_name,
+                          uint64_t size,
+                          uint64_t count,
+                          const char *suffix,
+                          char *out_stream_path,
+                          size_t stream_path_len)
 {
        int ret;
        char count_str[MAX_INT_DEC_LEN(count) + 1] = {};
        const char *path_separator;
 
-       if (path_name && (path_name[0] == '\0' ||
-                       path_name[strlen(path_name) - 1] == '/')) {
+       if (path_name && (path_name[0] == '\0' || path_name[strlen(path_name) - 1] == '/')) {
                path_separator = "";
        } else {
                path_separator = "/";
        }
 
-       path_name = path_name ? : "";
-       suffix = suffix ? : "";
+       path_name = path_name ?: "";
+       suffix = suffix ?: "";
        if (size > 0) {
-               ret = snprintf(count_str, sizeof(count_str), "_%" PRIu64,
-                               count);
+               ret = snprintf(count_str, sizeof(count_str), "_%" PRIu64, count);
                LTTNG_ASSERT(ret > 0 && ret < sizeof(count_str));
        }
 
-       ret = snprintf(out_stream_path, stream_path_len, "%s%s%s%s%s",
-                       path_name, path_separator, file_name, count_str,
-                       suffix);
+       ret = snprintf(out_stream_path,
+                      stream_path_len,
+                      "%s%s%s%s%s",
+                      path_name,
+                      path_separator,
+                      file_name,
+                      count_str,
+                      suffix);
        if (ret < 0 || ret >= stream_path_len) {
                ERR("Truncation occurred while formatting stream path");
                ret = -1;
@@ -407,7 +412,7 @@ int utils_stream_file_path(const char *path_name, const char *file_name,
  *
  * @return 0 on success, -1 on failure.
  */
-int utils_parse_size_suffix(const char * const str, uint64_t * const size)
+int utils_parse_size_suffix(const char *const str, uint64_t *const size)
 {
        int ret;
        uint64_t base_size;
@@ -513,7 +518,7 @@ end:
  *
  * @return 0 on success, -1 on failure.
  */
-int utils_parse_time_suffix(char const * const str, uint64_t * const time_us)
+int utils_parse_time_suffix(char const *const str, uint64_t *const time_us)
 {
        int ret;
        uint64_t base_time;
@@ -627,18 +632,18 @@ static inline unsigned int fls_u32(uint32_t x)
        int r;
 
        asm("bsrl %1,%0\n\t"
-               "jnz 1f\n\t"
-               "movl $-1,%0\n\t"
-               "1:\n\t"
-               : "=r" (r) : "rm" (x));
+           "jnz 1f\n\t"
+           "movl $-1,%0\n\t"
+           "1:\n\t"
+           : "=r"(r)
+           : "rm"(x));
        return r + 1;
 }
 #define HAS_FLS_U32
 #endif
 
 #if defined(__x86_64) && defined(__LP64__)
-static inline
-unsigned int fls_u64(uint64_t x)
+static inline unsigned int fls_u64(uint64_t x)
 {
        long r;
 
@@ -646,15 +651,15 @@ unsigned int fls_u64(uint64_t x)
            "jnz 1f\n\t"
            "movq $-1,%0\n\t"
            "1:\n\t"
-           : "=r" (r) : "rm" (x));
+           : "=r"(r)
+           : "rm"(x));
        return r + 1;
 }
 #define HAS_FLS_U64
 #endif
 
 #ifndef HAS_FLS_U64
-static __attribute__((unused))
-unsigned int fls_u64(uint64_t x)
+static __attribute__((unused)) unsigned int fls_u64(uint64_t x)
 {
        unsigned int r = 64;
 
@@ -839,8 +844,7 @@ size_t utils_get_current_time_str(const char *format, char *dst, size_t len)
        ret = strftime(dst, len, format, timeinfo);
        DIAGNOSTIC_POP
        if (ret == 0) {
-               ERR("Unable to strftime with format %s at dst %p of len %zu", format,
-                               dst, len);
+               ERR("Unable to strftime with format %s at dst %p of len %zu", format, dst, len);
        }
 
        return ret;
@@ -888,19 +892,16 @@ int utils_get_group_id(const char *name, bool warn, gid_t *gid)
 
                ret = lttng_dynamic_buffer_set_size(&buffer, new_len);
                if (ret) {
-                       ERR("Failed to grow group info buffer to %zu bytes",
-                                       new_len);
+                       ERR("Failed to grow group info buffer to %zu bytes", new_len);
                        ret = -1;
                        goto error;
                }
        }
        if (ret) {
                if (ret == ESRCH) {
-                       DBG("Could not find group file entry for group name '%s'",
-                                       name);
+                       DBG("Could not find group file entry for group name '%s'", name);
                } else {
-                       PERROR("Failed to get group file entry for group name '%s'",
-                                       name);
+                       PERROR("Failed to get group file entry for group name '%s'", name);
                }
 
                ret = -1;
@@ -931,8 +932,7 @@ error:
  * of elements in the long_options array. Returns NULL if the string's
  * allocation fails.
  */
-char *utils_generate_optstring(const struct option *long_options,
-               size_t opt_count)
+char *utils_generate_optstring(const struct option *long_options, size_t opt_count)
 {
        int i;
        size_t string_len = opt_count, str_pos = 0;
@@ -1020,8 +1020,7 @@ static const char *get_man_bin_path(void)
        return DEFAULT_MAN_BIN_PATH;
 }
 
-int utils_show_help(int section, const char *page_name,
-               const char *help_msg)
+int utils_show_help(int section, const char *page_name, const char *help_msg)
 {
        char section_string[8];
        const char *man_bin_path = get_man_bin_path();
@@ -1043,15 +1042,13 @@ int utils_show_help(int section, const char *page_name,
         * be installed outside /usr, in which case its man pages are
         * not located in the default /usr/share/man directory.
         */
-       ret = execlp(man_bin_path, "man", "-M", MANPATH,
-               section_string, page_name, NULL);
+       ret = execlp(man_bin_path, "man", "-M", MANPATH, section_string, page_name, NULL);
 
 end:
        return ret;
 }
 
-static
-int read_proc_meminfo_field(const char *field, uint64_t *value)
+static int read_proc_meminfo_field(const char *field, uint64_t *value)
 {
        int ret;
        FILE *proc_meminfo;
@@ -1062,7 +1059,7 @@ int read_proc_meminfo_field(const char *field, uint64_t *value)
                PERROR("Failed to fopen() " PROC_MEMINFO_PATH);
                ret = -1;
                goto fopen_error;
-        }
+       }
 
        /*
         * Read the contents of /proc/meminfo line by line to find the right
@@ -1072,8 +1069,9 @@ int read_proc_meminfo_field(const char *field, uint64_t *value)
                uint64_t value_kb;
 
                ret = fscanf(proc_meminfo,
-                               "%" MAX_NAME_LEN_SCANF_IS_A_BROKEN_API "s %" SCNu64 " kB\n",
-                               name, &value_kb);
+                            "%" MAX_NAME_LEN_SCANF_IS_A_BROKEN_API "s %" SCNu64 " kB\n",
+                            name,
+                            &value_kb);
                if (ret == EOF) {
                        /*
                         * fscanf() returning EOF can indicate EOF or an error.
@@ -1149,8 +1147,7 @@ int utils_change_working_directory(const char *path)
                         */
                        DBG("Working directory \"%s\" is not writable", path);
                } else {
-                       PERROR("Failed to check if working directory \"%s\" is writable",
-                                       path);
+                       PERROR("Failed to check if working directory \"%s\" is writable", path);
                }
        }
 
@@ -1204,7 +1201,8 @@ end_loop:
                } else {
                        *uid = p.pw_uid;
                        DBG("Lookup of tracker UID/VUID: name '%s' maps to uid %" PRId64,
-                                       user_name, (int64_t) *uid);
+                           user_name,
+                           (int64_t) *uid);
                        ret_val = LTTNG_OK;
                }
                break;
@@ -1222,8 +1220,7 @@ end:
        return ret_val;
 }
 
-enum lttng_error_code utils_group_id_from_name(
-               const char *group_name, gid_t *gid)
+enum lttng_error_code utils_group_id_from_name(const char *group_name, gid_t *gid)
 {
        struct group g, *gres;
        int ret;
@@ -1269,7 +1266,8 @@ end_loop:
                } else {
                        *gid = g.gr_gid;
                        DBG("Lookup of tracker GID/GUID: name '%s' maps to gid %" PRId64,
-                                       group_name, (int64_t) *gid);
+                           group_name,
+                           (int64_t) *gid);
                        ret_val = LTTNG_OK;
                }
                break;
@@ -1287,8 +1285,7 @@ end:
        return ret_val;
 }
 
-int utils_parse_unsigned_long_long(const char *str,
-               unsigned long long *value)
+int utils_parse_unsigned_long_long(const char *str, unsigned long long *value)
 {
        int ret;
        char *endptr;
@@ -1303,15 +1300,15 @@ int utils_parse_unsigned_long_long(const char *str,
        if (errno != 0) {
                /* Don't print an error; allow the caller to log a better error. */
                DBG("Failed to parse string as unsigned long long number: string = '%s', errno = %d",
-                               str, errno);
+                   str,
+                   errno);
                ret = -1;
                goto end;
        }
 
        /* Not the end of the string or empty string. */
        if (*endptr || endptr == str) {
-               DBG("Failed to parse string as unsigned long long number: string = '%s'",
-                               str);
+               DBG("Failed to parse string as unsigned long long number: string = '%s'", str);
                ret = -1;
                goto end;
        }
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