diff options
Diffstat (limited to 'src/os/unix/ngx_setproctitle.c')
-rw-r--r-- | src/os/unix/ngx_setproctitle.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/src/os/unix/ngx_setproctitle.c b/src/os/unix/ngx_setproctitle.c new file mode 100644 index 000000000..6ac87077f --- /dev/null +++ b/src/os/unix/ngx_setproctitle.c @@ -0,0 +1,143 @@ + +/* + * Copyright (C) Igor Sysoev + */ + + +#include <ngx_config.h> +#include <ngx_core.h> + + +#if (NGX_SETPROCTITLE_USES_ENV) + +/* + * To change the process title in Linux and Solaris we have to set argv[1] + * to NULL and to copy the title to the same place where the argv[0] points to. + * However, argv[0] may be too small to hold a new title. Fortunately, Linux + * and Solaris store argv[] and environ[] one after another. So we should + * ensure that is the continuous memory and then we allocate the new memory + * for environ[] and copy it. After this we could use the memory starting + * from argv[0] for our process title. + * + * The Solaris's standard /bin/ps does not show the changed process title. + * You have to use "/usr/ucb/ps -w" instead. Besides, the UCB ps dos not + * show a new title if its length less than the origin command line length. + * To avoid it we append to a new title the origin command line in the + * parenthesis. + */ + +extern char **environ; + +static char *ngx_os_argv_last; + +ngx_int_t ngx_init_setproctitle(ngx_log_t *log) +{ + char *p; + size_t size; + ngx_uint_t i; + + size = 0; + + for (i = 0; environ[i]; i++) { + size += ngx_strlen(environ[i]) + 1; + } + + if (!(p = ngx_alloc(size, log))) { + return NGX_ERROR; + } + + ngx_os_argv_last = ngx_os_argv[0]; + + for (i = 0; ngx_os_argv[i]; i++) { + if (ngx_os_argv_last == ngx_os_argv[i]) { + ngx_os_argv_last = ngx_os_argv[i] + ngx_strlen(ngx_os_argv[i]) + 1; + } + } + + for (i = 0; environ[i]; i++) { + if (ngx_os_argv_last == environ[i]) { + + size = ngx_strlen(environ[i]) + 1; + ngx_os_argv_last = environ[i] + size; + + ngx_cpystrn(p, environ[i], size); + environ[i] = p; + p += size; + } + } + + ngx_os_argv_last--; + + return NGX_OK; +} + + +void ngx_setproctitle(char *title) +{ + u_char *p; + +#if (SOLARIS) + + ngx_int_t i; + size_t size; + +#endif + + ngx_os_argv[1] = NULL; + + p = ngx_cpystrn((u_char *) ngx_os_argv[0], "nginx: ", + ngx_os_argv_last - ngx_os_argv[0]); + + p = ngx_cpystrn(p, (u_char *) title, ngx_os_argv_last - (char *) p); + +#if (SOLARIS) + + size = 0; + + for (i = 0; i < ngx_argc; i++) { + size += ngx_strlen(ngx_argv[i]) + 1; + } + + if (size > (size_t) ((char *) p - ngx_os_argv[0])) { + + /* + * ngx_setproctitle() is too rare operation so we use + * the non-optimized copies + */ + + p = ngx_cpystrn(p, (u_char *) " (", ngx_os_argv_last - (char *) p); + + for (i = 0; i < ngx_argc; i++) { + p = ngx_cpystrn(p, (u_char *) ngx_argv[i], + ngx_os_argv_last - (char *) p); + p = ngx_cpystrn(p, (u_char *) " ", ngx_os_argv_last - (char *) p); + } + + if (*(p - 1) == ' ') { + *(p - 1) = ')'; + } + } + +#endif + + if (ngx_os_argv_last - (char *) p) { + ngx_memset(p, NGX_SETPROCTITLE_PAD, ngx_os_argv_last - (char *) p); + } + + ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, + "setproctitle: \"%s\"", ngx_os_argv[0]); +} + + +#elif !defined(ngx_setproctitle) + +ngx_int_t ngx_init_setproctitle(ngx_log_t *log) +{ + return NGX_OK; +} + +void ngx_setproctitle(char *title) +{ +} + +#endif |