Defork execline

Signed-off-by: Laurent Bercot <ska@appnovation.com>

6 files changed, 57 insertions, 79 deletions

diff --git a/src/execline/background.c b/src/execline/background.c
index 7fefa1a..189e5c1 100644
--- a/src/execline/background.c
+++ b/src/execline/background.c
@@ -4,6 +4,7 @@
 #include <skalibs/types.h>
 #include <skalibs/sgetopt.h>
 #include <skalibs/strerr.h>
+#include <skalibs/cspawn.h>
 #include <skalibs/exec.h>
 
 #include <execline/execline.h>
@@ -15,6 +16,9 @@ int main (int argc, char const **argv, char const *const *envp)
   pid_t pid ;
   int argc1 ;
   int df = 0 ;
+  size_t i = 2 ;
+  char fmt[PID_FMT + 2] = "!=" ;
+
   PROG = "background" ;
   {
     subgetopt l = SUBGETOPT_ZERO ;
@@ -36,27 +40,9 @@ int main (int argc, char const **argv, char const *const *envp)
   if (argc1 + 1 == argc) df = 0 ;
   argv[argc1] = 0 ;
 
-  if (df)
-  {
-    pid = doublefork() ;
-    switch (pid)
-    {
-      case -1: strerr_diefu1sys(111, "doublefork") ;
-      case 0:
-        PROG = "background (grandchild)" ;
-        xexec0_e(argv, envp) ;
-    }
-  }
-  else
-  {
-    pid = el_spawn0(argv[0], argv, envp) ;
-    if (!pid) strerr_diefu2sys(111, "spawn ", argv[0]) ;
-  }
+  pid = df ? gcspawn(argv[0], argv, envp, 0, 0, 0) : cspawn(argv[0], argv, envp, 0, 0, 0) ;
+  if (!pid) strerr_diefu2sys(111, "spawn ", argv[0]) ;
   if (argc1 + 1 == argc) return 0 ;
-  {
-    char fmt[PID_FMT + 2] = "!=" ;
-    size_t i = 2 ;
-    i += pid_fmt(fmt+i, pid) ; fmt[i++] = 0 ;
-    xmexec_en(argv + argc1 + 1, envp, fmt, i, 1) ;
-  }
+  i += pid_fmt(fmt+i, pid) ; fmt[i++] = 0 ;
+  xmexec_en(argv + argc1 + 1, envp, fmt, i, 1) ;
 }
diff --git a/src/execline/pipeline.c b/src/execline/pipeline.c
index 00f4538..c68b912 100644
--- a/src/execline/pipeline.c
+++ b/src/execline/pipeline.c
@@ -6,8 +6,9 @@
 #include <skalibs/sgetopt.h>
 #include <skalibs/types.h>
 #include <skalibs/strerr.h>
-#include <skalibs/exec.h>
+#include <skalibs/cspawn.h>
 #include <skalibs/djbunix.h>
+#include <skalibs/exec.h>
 
 #include <execline/execline.h>
 
@@ -16,7 +17,18 @@
 
 int main (int argc, char const **argv, char const *const *envp)
 {
+  cspawn_fileaction fa[2] =
+  {
+    [0] = { .type = CSPAWN_FA_CLOSE },
+    [1] = { .type = CSPAWN_FA_MOVE }
+  } ;
+  pid_t pid ;
+  int p[2] ;
+  int argc1 ;
   int df = 0, w = 0 ;
+  size_t i = 2 ;
+  char fmt[PID_FMT + 2] = "!=" ;
+
   PROG = "pipeline" ;
   {
     subgetopt l = SUBGETOPT_ZERO ;
@@ -34,42 +46,21 @@ int main (int argc, char const **argv, char const *const *envp)
     }
     argc -= l.ind ; argv += l.ind ;
   }
-  {
-    pid_t pid ;
-    int fd ;
-    int argc1 = el_semicolon(argv) ;
-    if (argc1 >= argc) strerr_dief1x(100, "unterminated block") ;
-    if (argc1 + 1 == argc) strerr_dief1x(100, "empty remainder") ;
-    argv[argc1] = 0 ;
-    if (df)
-    {
-      int p[2] ;
-      if (pipe(p) < 0) strerr_diefu1sys(111, "create pipe") ;
-      pid = doublefork() ;
-      switch (pid)
-      {
-        case -1: strerr_diefu1sys(111, "doublefork") ;
-        case 0:
-          PROG = "pipeline (grandchild)" ;
-          fd_close(p[w]) ;
-          if (fd_move(!w, p[!w]) < 0) strerr_diefu1sys(111, "fd_move") ;
-          xexec0_e(argv, envp) ;
-      }
-      fd_close(p[!w]) ;
-      fd = p[w] ;
-    }
-    else
-    {
-      pid = el_spawn1(argv[0], argv, envp, &fd, !w) ;
-      if (!pid) strerr_diefu2sys(111, "spawn ", argv[0]) ;
-    }
-    if (fd_move(w, fd) < 0) strerr_diefu1sys(111, "fd_move") ;
-    if (w == fd) uncoe(fd) ;
-    {
-      char fmt[PID_FMT + 2] = "!=" ;
-      size_t i = 2 ;
-      i += pid_fmt(fmt+i, pid) ; fmt[i++] = 0 ;
-      xmexec_en(argv + argc1 + 1, envp, fmt, i, 1) ;
-    }
-  }
+
+  argc1 = el_semicolon(argv) ;
+  if (!argc1) strerr_dief1x(100, "empty block") ;
+  if (argc1 >= argc) strerr_dief1x(100, "unterminated block") ;
+  if (argc1 + 1 == argc) strerr_dief1x(100, "empty remainder") ;
+  argv[argc1] = 0 ;
+  if (pipe(p) == -1) strerr_diefu1sys(111, "create pipe") ;
+  fa[0].x.fd = p[w] ;
+  fa[1].x.fd2[0] = !w ;
+  fa[1].x.fd2[1] = p[!w] ;
+  pid = df ? gcspawn(argv[0], argv, envp, 0, fa, 2) : cspawn(argv[0], argv, envp, 0, fa, 2) ;
+  if (!pid) strerr_diefu2sys(111, "spawn ", argv[0]) ;
+  fd_close(p[!w]) ;
+  if (fd_move(w, p[w]) == -1) strerr_diefu1sys(111, "fd_move") ;
+  if (w == p[w]) uncoe(w) ;
+  i += pid_fmt(fmt+i, pid) ; fmt[i++] = 0 ;
+  xmexec_en(argv + argc1 + 1, envp, fmt, i, 1) ;
 }
diff --git a/src/libexecline/deps-lib/execline b/src/libexecline/deps-lib/execline
index e896f2f..a1f7c74 100644
--- a/src/libexecline/deps-lib/execline
+++ b/src/libexecline/deps-lib/execline
@@ -9,7 +9,7 @@ el_popenv.o
 el_pushenv.o
 el_semicolon.o
 el_spawn0.o
-el_spawn1.o
+el_gspawn0.o
 el_substandrun.o
 el_substandrun_str.o
 el_substitute.o
@@ -24,3 +24,4 @@ exlsn_main.o
 exlsn_free.o
 exlp.o
 -lskarnet
+${SPAWN_LIB}
diff --git a/src/libexecline/el_gspawn0.c b/src/libexecline/el_gspawn0.c
new file mode 100644
index 0000000..d6e0d3a
--- /dev/null
+++ b/src/libexecline/el_gspawn0.c
@@ -0,0 +1,16 @@
+/* ISC license. */
+
+#include <skalibs/cspawn.h>
+
+#include <execline/config.h>
+#include <execline/execline.h>
+
+pid_t el_gspawn0 (char const *prog, char const *const *argv, char const *const *envp)
+{
+  if (!argv[0])
+  {
+    static char const *const newargv[3] = { EXECLINE_BINPREFIX "exit", "0", 0 } ;
+    return gcspawn(newargv[0], newargv, envp, 0, 0, 0) ;
+  }
+  else return gcspawn(prog, argv, envp, 0, 0, 0) ;
+}
diff --git a/src/libexecline/el_spawn0.c b/src/libexecline/el_spawn0.c
index d4265a4..d397557 100644
--- a/src/libexecline/el_spawn0.c
+++ b/src/libexecline/el_spawn0.c
@@ -12,5 +12,5 @@ pid_t el_spawn0 (char const *prog, char const *const *argv, char const *const *e
     static char const *const newargv[3] = { EXECLINE_BINPREFIX "exit", "0", 0 } ;
     return cspawn(newargv[0], newargv, envp, 0, 0, 0) ;
   }
-  else return cspawn(prog, argv, envp, 0, 0, 00) ;
+  else return cspawn(prog, argv, envp, 0, 0, 0) ;
 }
diff --git a/src/libexecline/el_spawn1.c b/src/libexecline/el_spawn1.c
deleted file mode 100644
index d9a7f87..0000000
--- a/src/libexecline/el_spawn1.c
+++ /dev/null
@@ -1,16 +0,0 @@
-/* ISC license. */
-
-#include <skalibs/cspawn.h>
-
-#include <execline/config.h>
-#include <execline/execline.h>
-
-pid_t el_spawn1 (char const *prog, char const *const *argv, char const *const *envp, int *fd, int w)
-{
-  if (!argv[0])
-  {
-    static char const *const newargv[3] = { EXECLINE_BINPREFIX "exit", "0", 0 } ;
-    return child_spawn1_pipe(newargv[0], newargv, 0, fd, w) ;
-  }
-  else return child_spawn1_pipe(prog, argv, envp, fd, w) ;
-}